6γ3 ΦΩΤΟΒΟΛΤΑΙΚΑ ΦΤΙΑΞΟ ΜΟΝΟΣ ΣΟΥ EG
6γ3 ΦΩΤΟΒΟΛΤΑΙΚΑ ΦΤΙΑΞΟ ΜΟΝΟΣ ΣΟΥ EG
6γ3 ΦΩΤΟΒΟΛΤΑΙΚΑ ΦΤΙΑΞΟ ΜΟΝΟΣ ΣΟΥ EG
ΦΩΤΟΒΟΛΤΑΙΚΗ ΤΕΧΝΟΛΟΓΙΑ
Copyright 2010
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Novel of NON DEEP REALITY – FANTASY PRODUCT
По цене
LIAPIS Panagiotis
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Author LIAPIS Panagiotis
Title
Addr K. Varnali 12 15121 Pine Athens
Tel 210-6149149
Mob. 6937097443
E-mail real_estate_liapis@yahoo.gr
SUPPLY 210.8065618 6937097443
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developed from the Greek National Nuclear epistimoina C. Gkiolva. The creations of
the Plan "Arrow" (sound rule) and the sound "Artemis", as are sources on the web are
presented in detail below in relation to biological warfare aircraft from the US-spray
from chemical and microbial air over cities. Trying to minimize the harmful effects that
using genetics Industry, extensive fires, building new towns in the concentration camps
of D Reich, apply geostrategic implementation plan new war in the Balkans because of
Kosovo, where the project "Blue Ray" at the upcoming mayhem by the end of 01/2010
will chrisimopoiithoun new weapons bass Police with physical effects of radiation on the
human organism KARKINOUS
By Price
LIAPIS Panagiotis
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CAUTION - SIGNIFICANT MARKINGS TO READER
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Photovoltaic technology is the direct conversion of sunlight into electrical
voltage, which guarantee the generation of electricity.
Photovoltaics convert sunlight directly into electricity, ie not mediate
mechanical, thermal or chemical conversion steps. This occurs in
semiconductors with specific contaminants or coatings, which are processed
to become solar cells.
A photovoltaic system consists essentially of solar modules and an inverter in
the event of a grid system or a battery charge regulator in the case of
autonomous systems.
Use standard mainly cells from crystalline silicon. Within the slices are cut from
a crystal (monocrystalline) or from a solid piece, consisting of many crystals
(polycrystalline). Then follow various stages of production until they reach the
solar cell. The solar cell thin film coated onto glass in a vacuum, achieving this
way the cell has one-thirtieth the thickness of the crystalline solar cell
The solar cells are electrically connected and placed permanently in solar
modules, which protect the solar cells on the weather. Solar modules are
offered in a variety of shapes, sizes and amount of power for every application.
The photovoltaic modules are provided with or without aluminum frame and
are usually on the front side with a special solar glass and rear synthetic
membrane, however, made on both sides with glass. Specific modules opens
new avenues for interesting architectural approaches
The inverters convert the direct current produced in the solar system
compatible with the AC. The inverter is analyzing the electric grid and feeds
electricity to the proper frequency of the network. In this way, help to stabilize
the electricity grid. These inverters usually have interfaces (communication
interfaces) for remote control and on-aposaseos control facility
Charge controllers set up to use the electricity produced in solar TENA
autonomous system for charging batteries or to supply directly to consumers.
When there is sunshine, the regulator takes power from the battery
The photovoltaic (PV) components convert the energy of the visible spectrum
of sunlight into electricity. This transformation is directly inside the solar cell
with only consumable item sunlight and produce direct current (DC) able to
power any device AL. The first part of the word photovoltaic comes from the
word light, while the second is in honor of the Italian physicist Alessandro Volta
(1745-1827), a pioneer in the study of electricity and known to the public from
the development of electric batteries zinc - copper ( Zn - Cu) with an
electrolyte of sulfuric acid (H2SO4).
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three categories. Depending on the process open to the material from their
cells made of amorphous, monocrystalline and polycrystalline silicon.
The monocrystalline silicon cells require very high raw material purity and the
highest conversion efficiency of solar radiation to electricity, but have the
highest market price. The monocrystalline cells produced chopping a single
crystal (thickness cell 1 / 3 to 1 / 2 mm), a large single crystal ingots, which
has developed at temperatures around 1400 ° C, which is a very expensive
process. The silicon must be very high purity and has a perfect crystal
structure. Such solar cells have the highest efficiency, ie higher percentage of
converting solar energy into electricity. The yield of around 18% -23%,
meaning that solar radiation is 700 Wh / m ² on the day it will produce for the
specific day 120 Wh / m ² to 160 Wh / m ²
The polycrystalline cells are cheaper because they are based on a simple
production method, but with less efficiency compared to monocrystalline. The
polycrystalline cells are made with a casting process where molten silicon is
poured into an industrial to a form where it is formatted. Then cut the
gkofretes.Dedomenou that polycrystalline cells are made by casting is
considerably cheaper to produce, but not both profitable and monocrystalline.
This lower efficiency, ranging between 13% and 15%, due to defects in the
crystal structure as a result of casting process. Just as the ancient Egyptians
and Sumerians in the pyramids, only this the "casting" was called "plastering"
the you caught; Understand why the pyramids outside plaster; FOR YOU TO
DO ENERGEIAKOUS collectors
Amorphous silicon (a-Si)
The amorphous silica used in the manufacturing cell in the form of thin film.
These cells have the lowest efficiency, but of particular interest in specialized
applications, as indicated below.
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Cells in the form of thin film made from other materials such as copper
diseliniouchos Indian (CuInSe2), the cadmium telluride (CdTe) and arsenious
gallium (GaAs). This technology allows the application of solar cells on
inexpensive substrates such as plastics and glass and used to replace key
components of existing or new construction. The amorphous silicon, one of the
thin-film technologies (thin film technology), is made by depositing silicon onto
a glass substrate by a reactive gas such as silane (SiH4). It has a crystalline
structure and thickness (2-3 mm) is particularly smaller than the crystalline
form of silicon (200-500 mm). From manufacturing point of view is simpler and
therefore cheaper, but its performance is comparatively smaller ranges
between 4% and 11%. However, it is good even in absence of sunlight. The
amorphous silicon solar cells are a reddish-brown hue, almost black, and a
surface composed of narrow, long strips. The efficiency of amorphous silicon
photovoltaic between 4% and 11%, depending on the technology and
materials used in the solar cell is a key component of the generation of energy
from the sun and deliver, in optimum conditions, power 1,5 W to 0,5 V. The
performance of the cell decreases with increasing temperature and increasing
the angle of incident solar radiation. The cells combined electrically, forming
the smallest commercially usable standalone unit, the photovoltaic panel. The
cells, which form the framework installed and encapsulated in a suitable
material, usually plastic polymer, to ensure good electrical insulation and to
provide the necessary protection against the weather (rain, hail, frost, low
temperatures). The modules are based on appropriate databases
differentiated according to application. Thus constructed from simple building
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to contain a frame on a roof, complex monitoring devices to track the sun two
axes.
The most common one photovoltaic voltage is 12 V, which is sufficient for
charging common battery. The modules are joined together either in series or
parallel, as if designed to increase the voltage or current, forming the
photovoltaic arrays. Combining the two links found in large production
systems. For the protection of cells and frames, and the flow of electricity in
the circuit be installed blocking diodes and bypass diodes.
The compact solar power systems are a useful and easy solution for the needs
of remote settlements in the network or housing. Necessarily accompanied by
an energy storage medium (usually battery). The compact combination of solar
and wind systems have the advantage of producing energy from wind in the
dark hours of 24 hours. And are accompanied by a means of storing energy.
The compact hybrid systems usually do not require storage (batteries),
producing energy from ntizelogennitria installed during the hours the sun is
absent and / or air exorthologikopoioun installed capacity of solar and / or wind
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farms.
In the interconnected power grid systems can save the cost of alternative
production while, as long as there is excess power, the system administrator
(DESMIE or PPC) buys the excess energy Since the production of renewable
energy varies considerably hourly, daily and seasonal fluctuations, the storage
in interconnected systems facilitate a better correlation between supply and
demand.
The need for conversion produced by photovoltaic cells HVDC (DC) to
Alternating Current (AC) specified voltage and frequency or the AC power
supply devices, or interconnection with the grid, makes it imperative to
interference power electronics for above conversion and check the parameters
of the produced electricity. The most common equipment consists of inverters
DC / AC controllers charging batteries, devices to prevent overload and short
circuits and electronic units continuous monitoring and control station and data
at remote locations.
Apart from the above three types of solar cells from silicon available in the
global market, and efforts are conducted on the use and other factors (either
alone or in combination) such as gallium arsenide (GaAs), cadmium sulphide
(CdS), indium phosphide ( InP). Also of great interest are the solar cells very
thin-film copper-indium-gallium-diselenide, which have higher efficiency (8-
13%) than that of amorphous silicon. Finally, a completely new technology is
an innovative product spheral solar, based on material that is expected to start
being built in 2004. Unlike conventional solar cells, the new material is not
deposited on a rigid silicon base, but made thousands of dirt cheap silicon
beads (made of silicon residues resulting from the industry of computer chips),
trapped between two sheets of aluminum
Each bead acts as an independent tiny solar cell, absorbing sunlight and
converting it into electricity. The aluminum sheets give the material physical
strength necessary to enable it to be flexible and lightweight, while playing the
role of electrical contact. The area filled bubbles that create the beads allows
much greater absorption of sunlight, giving the material efficiency of 11%. The
inventors of support that can cover any shaped surface, greatly increasing the
places where they can produce electricity and giving architects the opportunity
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to design buildings with curves can be fitted with solar panels needed without
even closer to construction support them as the picture above.
One characteristic of photovoltaic cells is that their performance is affected by
the temperature developed in the available solar radiation. This effect varies
with the type of PV. Overall efficiency is changed in relation to the temperature
of solar as the figure below
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prolonged use.
_ Output: connection cable with water-protected plug connector.
Cells thin-film
Technical Information Duennschicht-UGR084720 2.0 1 / 7
Technology Units
The SMA inverters offer an appropriate solution for each unit
Along with conventional photovoltaic units marketed recently in the market
more often cell technologies, and advanced versions of common units. At the
same time, innovative technologies such as thin-film units and cell contact in
the rear
offer benefits over time, for example, reduced production costs, shorter times
return energy or very high efficiency. We must always observe that certain
technologies should be operated only under certain conditions. For this
reason, in the use of photovoltaic units should be observed by the
manufacturer's installation instructions. Due to the large supply of different
topologies, handling conversions SMA (in conjunction with the corresponding
set of earth) is highly flexible and available to each unit a
optimal device. In addition, we maintain close contact with manufacturers
units, so we can easily adapt to current installation instructions.
Technical Information Optimal operation of photovoltaic generators of new
technology SMA Solar Technology AG 2 / 7
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NR), the phenomenon of polarization prevented from the outset.
• If the generator is grounded or has been, likely due to the provisional
application of high negative voltage on the defective unit back to its original
state and / or return of the cells. The exact process of regeneration will be
conducted in consultation with the manufacturer of the units. However, the
revitalization of the units does not prevent the recurrence of the phenomenon.
In this case serves only to positive ground
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preventing erosion doubt. This measure should be a priority.
• An alternative measure is to seal the edges of the unit. Thereby preventing
the ingress of moisture and the process of erosion is moving to the second
level.
• Favourable effect also has the potential to reduce leakage by increasing the
distance between the units and earthed structures (eg the unit). The two
phenomena described are directly related to the capacity of the generator, in
this case it means the voltage of the generator to the ground. Unlike the
voltage of photovoltaic units (between positive and negative association) in the
design of the facility was given little attention to the trend towards the ground.
Therefore, this trend may be different depending on the topology of the
converters (see chart "Dynamic Generator Sunny Boys").
Technical Information Optimal operation of photovoltaic generators of new
technology SMA Solar Technology AG 4 / 7
However, the choice of a particular converter topology does not in itself
prevent the problems already mentioned. Only through the (extra) a grounding
pole can determine the direction of the field throughout the photovoltaic
generator and consequently to prevent erosion TCO and / or the phenomenon
of polarization.
Remedies
The structure of the units should be examined in detail before designing the
facility. With a maximum leakage current over 50 mA should be chosen with
an SMA inverter topology and the corresponding reduced leakage current. In
this case the ideal is a Sunny Boy inverter, because the galvanic isolation
prevents leakage current in the network. But the types of inverter series TL-HC
with the topology of the Quiet-Rail is particularly relevant, because in this
current window is needed for the operation is extremely low. When using other
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Sunny Boy must be guaranteed from the design phase of the installation that
could deactivate a protection switch RCD / FI. Moreover, a threshold required
to activate 300 mA according to standards VDE, presents no problem.
Technical Information Grounding the generator: easy and simple to set ground
SMA SMA Solar Technology AG 5 / 7
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photovoltaic units to the environment. The photovoltaic panels can be easily
earthed only in conjunction with grounding kit. To this end grounded one of the
connections of the generator through a security (the picture shows
schematically a positive ground) to continue to ensure the safety and
supervision of the generator insulation. This internationally recognized (and
partly required) earth can only be placed with little handles on each Sunny Boy
with a transformer.
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"Investigation of Degradation
Aspects of Field Deployed Photovoltaic Modules "; National Center for
Photovoltaics and Solar Program
Review Meeting, 24.-26.03.2003, Denver / Colorado; NREL/CD-520-33586, S.
958.
To help you in choosing the right converter for each type of unit, we have
assembled here the most important instructions for you:
1. Check if the manufacturer of photovoltaic units to provide guidance for
grounding the generator or the converter topology used.
Example: The company recommends Sunpower solar panels from units with
type A-300 cells to positive ground connection. The right choice: Sunny Boy
with adapter kit and a good grounding. See Chapter 2.1 on page 2.
2. If the manufacturer of photovoltaic units provides specifications for using the
products, then we recommend that you select the converter according to the
characteristics of photovoltaic units listed here.
Example: The unit thin membrane cells from cadmium telluride and / or
amorphous silicon is usually used as a substrate (substrat) on the structure of
a cell glass plate coated with TCO. The right choice: Sunny Boy with adapter
kit and a negative ground. See Chapter 2.2 on page 3.
Example: Flexible thin film cells is commonly used as a substrate (substrat) a
carrier film of stainless steel. The right choice: Sunny Boy inverter with or
without transformer topology Quiet-Rail (Sunny Boy xxxxTL-HC). See Chapter
2.3 on page 4.
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Φωτογραφίες φωτοβολταϊκού
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In the next photo, it seems a
photovoltaic element without
wires, one with wires stuck on the
front side and a PV element from the
back side (the wires are shown in
3rd PV component protruding
from the front / side of blue: the
back look no further bogged down
cables. This will be done later).
In the next photo looks all our
information ready for the
interconnection between them.
The length of each section
kalodiotainias is such that it
reaches the back of the next solar
cell to be tagged, as shown in
photos.
In the last photo with PV data below shows the way in which interlinked:
The two wires will go from the top of the 1st cell in the bottom of the
2nd. The more cables the 2nd cell on the bottom of 3. The cables on the
3rd cell in the bottom of the 4th, etc.
In the photo below I have made 3 cells in series and simply shows the
front side and once from behind. This column eat PV data turns 3 x 0,6
= 1,8 Volt. At the end of the column has 6 cells in series, and there are 6
such batteries in photovoltaic panels (a total of 36 PV-modules).
Tests and measurements
The photovoltaic panel as shown in the photo below is ready. The
construction went very well and his performance even better!
I tried (in September at 16:00 noon) and the yield was very high and the
upper limit of the specification: 21,6 Voc and 4.9 A! That is 106 Watt!
Under load the power is certainly a little lower ... The glass that we use
and this will cause some small loss, depending on the thickness and
type.
Anyone who wants to create his own happy to help, although it is not
difficult!
Anyone who has purchased the cells and preparing to begin
construction, can be opened by-step guide with detailed information
step by step how a manufactured panel.
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more!
The guide is in two parts and requires that you have already purchased
photovoltaic cells (cells) and kalodiotainia interface and got in front of
you, ready to begin construction. Otherwise, the guide looks tricky, but it
is not!
• Part 1: Preparation of photovoltaic modules and the interface between
them (this page).
• Part 2: Integration of photovoltaic panels and possible improvements
or additions.
Watch the video here and construction of photovoltaics.
Preparation of PV CELLS
1. With a small screwdriver, very lightly just scrape the two white lines
on the front drivers-side of each photovoltaic cell on which to stick the
kalodiotainies. So do the lines (or small square boxes) on the back of all
the hives. We just scrape out much, only what you need to leave some
white paint and reveal little silver underneath.
Connect both KALODIOTAINIAS IN PHOTOVOLTAIC KYPSELES
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1. Clean with some liquid solder (liquid flux, paste-like solder but fat liquid /
sold by stores electronic equipment) line on which to stick the kalodiotainia.
2. Align with one hand a piece kalodiotainias on the left bar. We keep the
kalodiotainia in place with fingers or a katsavidaki. Half will be at the white line
on the cell and the other half would be hanging down freely. Begin bonding
with the soldering iron to start from the middle of the cell as above and then
bogged down starting from the middle and down. We do the same in the 2nd
row right.
3. This will stick with kalodiotainies, currently only the front (blue) side of the
cell and 36 cells.
4. When stuck between 2 kalodiotainies only in front of ALL cells, we get 4 of
these cells, the Turn upside down and stick the same way two other
kalodiotainies the back side but in the opposite direction!
5. So we end cell 32 kalodiotainies only the front side and another 4 cell
kalodiotainies and front and back (see next photo, like the cell - which is itself,
in the upper-right side of photography and has kalodiotainies the front and
back side).
The next two photos seem a mold that I have made from plywood to keep
aligned cells and helps the solder. This is optional, just an idea. The small
crosses that appear are used by craftsmen who install tiles.
When you run out of solder, place the plexiglass over the back and using half
the person I'll go upside down so the cells to find their final position, as shown
in next photo.
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Repeat the same with a second piece of
coarse kalodiotainias length 25 cm, to
continue the circuit (negative-positive)
from 2nd to 3rd column in the top panel
(ie connect a series of negative-positive
cells on the 2nd and 3rd column).
Repeat the same third part coarse
kalodiotainias length 25 cm, to continue
the circuit (negative-positive) from the
3rd to 4th and last column at the bottom
of the panel (ie connect a series of
positive-negative cells in the lower 3rd
and 4th column). Finally, again with
pieces of coarse kalodiotainias length
of about 30 cm, we get the outputs +
and - panel.
1. Sticking cables up surplus in the first
cell of the 1st column on the thick
kalodiotainia, which continues at
outside a hole in the back of the panel.
This is the positive (+).
2. Sticking cables up surplus over the
cell column of 4 in thick kalodiotainia,
which continues after the other outside
hole on the back panel. This is the negative (-).
Raise just a few cells in the 1st and 4th column and place them underneath a
small drop of silicone and leave them to stick on the back panel. Also sticking
kalodiotainies and thicker on the back panel with an epoxy glue or strong glue
now. With care not to push the cells and break.
The insulation of Photovoltaic panels
Now finished with photovoltaic cells, we can put the front window.
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To avoid touching the glass of weight over the cells and break down, stick to
the 4 corners of the 4 small plastic washers (or something similar) 2 mm thick
(2mm) to keep the required distance when you put the glass.
Spread transparent silicone (coat thickness of about half a centimeter) around
on the Plexiglas and place very carefully over the glass to stick. Leave it that
way for at least 6 hours without the move to stick well.
External cables
Open in a plastic waterproof electrical box two holes and pass the two thick
kalodiotainies emerging from the panel there. You stick this box back panel
with lots of silicone to prevent water from entering behind him.
Open this box and two holes down and pass the wires will go to battery. The
tie and a knot on the inside of the box that they can not be pulled out of the
holes. The link to kalodiotainies panel (positive kalodiotainia with a cable and
the other negative). We make sure that there is no case to ever touch the
panel kalodiotainies two together (short circuit)! Insulate the electrical box with
silicone wherever they could get nero.Afto was. The photovoltaic panels are
finished! Because the interior panels is trapped air, it may create under certain
weather droplets of moisture may cause long term rust-cell connections. There
are three different solutions, as follows:
1. The smaller the distance between the back and front glass, the less air, so
the better. So if we leave a minimum gap between front and rear back glass
(eg one or two millimeters), and thus minimize and blur that can occur a few
days.
2. To completely eliminate the problem of moisture, there is a liquid silicone
Sylgard 184 (sold in some specialty stores chemical species, or order from
abroad). We can place cells in the glass (and not to stick on the back panel)
and pouring the back (silver) cells with this viscous liquid after a few hours and
hardens substantially encapsulates cells and protects so the air.
3. Finally, another very professional solution is this: After placing the cells in a
Mosque, go to a mosque and ask him to shut us like double glazed windows
with aluminum perimeter. In two windows and put a special material that
absorbs moisture, so not obscure double glazed windows in homes.
Aluminium, however, is not necessary. For aesthetic reasons we can stick
around aluminum film.
For any one to charge a battery panels properly without being destroyed must,
however, a charge controller.
To operate from the battery devices that require 230V, requires an inverter
230V, which converts the 12V battery to 230V. There are expensive inverter to
produce clean sine (like current PPC) and Modified sine inverter (not as
"clean" power, but good to work correctly most devices). If a friend wants to
create such a panel 90W happy to help. I have secured a few cells at a very
low price.
The cost is EUR 36 145.00 2 cells, about 1.5 per Watt, when the
corresponding commercial panels can be overcome and 5.00 per Watt.
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Are 20m kalodiotainias to 20.00 euros.
Panagiotis LIAPIS
PHOTOVOLTAICS
27
. Letter written in the year 2070
Some consider it excessive. We live in 2070 but to know ...
We are in year 2070. I am 50 years old but look 85. I have many problems
because I drink very little water. I think it remains for me a long time now.
Today, I am one of the most elderly in the society I live. I remember when I
was 5 years old, there were many trees in the parks, houses had beautiful
gardens could be underneath the shower about an hour. Now we use towels
with mineral oil to be washed.
• Before all women exhibit the beautiful hair. Now, should shave her head to
keep it clean without using water.
• Before, my father washed the car with the hose. Today is strictly prohibited
by law such use.
• Remember that there were many ads saying CAUTION WATER, but nobody
paid attention. People believed that water is inexhaustible.
Today, all rivers, dams, lakes and aquifers are irreversibly polluted or dried.
The surrounding landscape is no longer merely a vast desert. Gastrointestinal
infections, skin and urinary tract injuries are the leading causes of death.
The industry is paralyzed, and the unemployment rate is extremely high. The
seawater desalination plants is the main area of employment.
Give workers drinking water instead of salary. The attacks on a jerry of water
is constant through the deserted streets.
The diet is 80% synthetic.
• Before, recommended to drink 8 glasses of water a day. Today, I can only
drink half a glass.
• Because we can not wash our clothes, we throw, which increases the volume
of garbage.
• go back to using tanks as the last century because the sewers do not work
anymore because of lack of water.
People are faced with fear: their bodies are sickly, wrinkled from dehydration,
pligiasmena caused by ultraviolet radiation can no longer filter the air because
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of the ozone hole.
Because of dry skin, a young woman 20 years is 40. Scientists are doing
research, but there is no solution in sight. We can not construct water ...
Oxygen has also been reduced due to lack of trees, which reduces the
intellectual level of the younger generations.
The morphology of spermatozoa of a large number of people has changed,
which makes many births of children affected by failure of mutations and
malformations.
The government requires us to pay for the air we breathe, 137 m3 per person
per day. Those who can not pay expelled from the "ventilated areas" that are
equipped with gigantic mechanical lungs that work with solar energy.
• The air is not very good, but at least we can breathe.
• The average age is 35 years.
• Some countries succeeded in preserving vegetation islands with clean
running water. These zones are closely supervised by the army.
• Water has become a rare species, a priceless treasure, much more than gold
or diamonds. But here, there are no trees because it hardly ever rains. And
when it starts to rain, it falls rather than acid rain.
• No longer seasons due to climate change (global warming) from human
activities in the 20th century that pollute the environment.
But we predict that they should take care of our environment, but nobody did
anything.
When my daughter asks me to narrate how it was when I was young, telling of
how the forest was beautiful.
By talking about the rain, flowers, pleasure to swim and fish in rivers and lakes
and to drink as much water as you want! And for the health of people ...
By asking:
- Dad! Because there is no more water?
So I have a lump in my throat ...
I can not stop me I feel guilty because I belong to the generation that
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completed the destruction of the environment, not taking seriously the
numerous warnings.
I am the last generation that could change the course of things, but decided
otherwise.
Today our children are paying dearly ...
Frankly, I believe that life on that land will be from now on because of
environmental destruction has arrived at a point where no return.
How would you like to go back and somehow I did not understand the whole
human race ... At the moment we can still do something to save our planet!
-----
About this letter to those who can! You will only be the minimum for the
awakening of global consciousness and the need to save water.
This one is not a game, it is already our reality. Do it for your children. And if
you have not yet, maybe one day have.
Do not leave a legacy to hell ... Let them life!
Reproduced: www.iqsolarpower.com
By Price
LIAPIS Panagiotis
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Active Solar Systems
The "heart" of an active solar system is the solar collector, typically mounted
on the roof or the roof of a house. The collector captures the sun's rays to
produce heat. Then this heat is transferred to the place to be stored or
consumed. When exposed to sunlight, a black surface is heated more easily
(strongly absorb solar radiation) than a white surface (where we have reflected
much of the sun).
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Passive Solar Systems
The man has long been understood that it can build the house in such a way
as to utilize the sun as much as possible for heating in winter, and be
protected from this kalokairi.Ta homes in the Cyclades, where Plenty of sun
and little vegetation, is white to reflect sunlight.
The buildings include the passive solar design and construction
legontaivioklimatika ktiria.As see how we can implement some of these
systems for space heating:
By placing large windows on the south side of a building permit, in winter,
solar radiation can pass into space and the thermanei.Taftochrona using
insulation and ensuring there are no cracks, preventing the heat to escape.
Using also suitable materials for the walls and floor, which absorbed tassel
and store heat from sunlight during the day, we can get back this heat at night,
that we need more!
Electricity from the Sun
Apart from the direct use or storage of solar energy as heat, it is possible to
turn and electricity. This transformation is called photovoltaic effect. This
phenomenon occurs in certain materials are more expensive, unfortunately,
which have the capacity to generate electricity when fotizontaiTaftochrona
using heat and making sure there are no cracks, preventing the heat to
escape. Using also suitable materials for the walls and floor, which absorbed
tassel and store heat from sunlight during the day, we can get back this heat at
night, that we need more!
Electricity from the Sun
Apart from the direct use or storage of solar energy as heat, it is possible to
turn and electricity. This transformation is called photovoltaic effect. This
phenomenon occurs in certain materials are more expensive, unfortunately,
which have the capacity to generate electricity when illuminated
Small pieces of these materials (solar cells) or with multiple arrays (solar
panels) can supply electrical appliances and recharging electric accumulators
(batteries) only by solar energy. Solar cells are on the calculators we use in
watches, etc.
Wind power
The wind, as long has found the man is a great source of energy, the
exploitation of which could in an economical and environmentally friendly way
to offer important solutions to meet the energy needs.
The energy of wind, wind (Aeolus was the "manager" of the winds in ancient
Greek), utilized nowadays increasingly often in areas where strong winds
blow, producing electricity
Wind energy sectorsNon wind is essentially the kinetic energy of wind, whose
primary source is the sun again. The sun warming the air masses, forces them
to move upward while the other takes place cooler. Thus the movement of air
masses creates wind.
59
Or hydraulic-hydro
Like all bodies to move, so water from melting ice and snow or rain that fell at
high altitudes, have energy and descend to lower areas. However, when the
descent is from many points and still not be easy or possible to use this.
Reservoir
Biomass
The primitive man to heat and cook, use the energy (heat) from the burning
wood. Until now, many poor rural populations, especially in Africa, India and
Latin America to keep warm, cook and lit primarily wood, crop residues (straw,
wood shavings, worthless fruit or seeds) and animal wastes (manure , fat
animals, trash fish). But the residents of developed countries (mainly in rural
areas) using wood, wood chips and residues of wood processing and
pyrinoxylo (from olive stones) in increasing quantities for energy purposes,
mainly for heating.
Biomass in a glasshouse in Crete
All these materials, directly or indirectly from the vegetable world, as part of
the waste and garbage (food scraps, paper), cities and industries, and is
known as biomass for the entire humanity a significant quantity source.
Geothermal energy
Groundwater when going through these rocks heated and the temperature can
reach up to 350 degrees. The idea of holding this energy spurt came from the
large quantity of hot water or steam, or just hot air (geothermal fluids) in many
parts of the world. In still other areas which do not have this privilege, are
drilling deeper, where there are geothermal fluids.
PROPER USE AND SAVING ENERGY
METHODS OF USE SOSTIS ENERGY TO DO AND ECONOMY IN FUEL
AND MONEY
In developed countries, as in our country, there is an incredible waste of
energy, and the "civilized" man consumes more and more goods. So do not
realize that fossil fuels (which uses more) will end soon and that the use of
incurring more and more the world (mainly carbon dioxide) with devastating
effects on the environment and ultimately our own lives.
You children are tomorrow's citizens will live in the future effects of energy
dissipation of large, need to understand and apply the following simple rules,
and so that the fuel last longer and the environment are protected.
HEAT INSULATION
Motivate your parents to put double glazing and insulate the roof and the roof
of the pilot.
If there are cracks around doors and windows close them with an insulating
material.
HEATING
60
On sunny winter days, open windows to let in sun in your home.
On cold winter nights close the shutters of the windows and curtains to keep
the heat inside your home.
On cold winter nights are best wearing a warm sweater rather than rising over
heating.
AIR CONDITIONING - DROSISMOS
When using the air conditioner in the windows and doors should be closed.
On warm summer days the shutters of the windows should be closed to avoid
the sun enters your home.
Your summer nights open doors and windows to ventilate - and-cool your
home.
LIGHTING
Always turn off the lights when there is someone in the room.
During the day open the windows and curtains to the sun illuminate your
home.
Turn the water heater only when needed hot water and do not
afinoumesynecheia lit.
Motivate your parents to buy a solar water heater, where the sun warms the
water they need.
REFRIGERATOR - FREEZER
Before you open the fridge We want to think about what parome valome or in
the refrigerator.
Anoigome the refrigerator door less often as we can, and do not ever keep it
open too long.
61
ELECTRIC KITCHEN
Always close the screen of a computer by clicking the appropriate button and
did not leave on standby (with the little LED lit).
GAMES
When we go or we get from school by car, we invite our classmates and others
to come with us!
Motivate your parents can agree between them that each time the car takes
you or you get out of school is filled with friends and classmates.
Motivate your parents to drive correctly and avoid high speeds and braking
sharply.
is essentially the kinetic energy of wind, whose primary source is the sun
again. The sun warming the air masses, forces them to move upward while the
other takes place cooler. Thus the movement of air masses creates wind.
Or hydraulic-hydro
Like all bodies to move, so water from melting ice and snow or rain that fell at
high altitudes, have energy and descend to lower areas. However, when the
descent is from many points and still not easy or possible to use this.
Reservoir
Biomass
The primitive man to heat and cook, use the energy (heat) from the burning
wood. Until now, many poor rural populations, especially in Africa, India and
Latin America to keep warm, cook and lit primarily wood, crop residues (straw,
wood shavings, worthless fruit or seeds) and animal wastes (manure , fat
animals, trash fish). But the residents of developed countries (mainly in rural
areas) using wood, wood chips and residues of wood processing and
62
pyrinoxylo (from olive stones) in increasing quantities for energy purposes,
mainly for heating.
Biomass in a glasshouse in Crete
All these materials, directly or indirectly from the vegetable world, as part of
the waste and garbage (food scraps, paper), cities and industries, and is
known as biomass for the entire humanity a significant quantity source.
Geothermal energy
Groundwater when going through these rocks heated and the temperature can
reach up to 350 degrees. The idea of holding this energy spurt came from the
large quantity of hot water or steam, or just hot air (geothermal fluids) in many
parts of the world. In still other areas which do not have this privilege, are
drilling deeper, where there are geothermal fluids.
PROPER USE AND SAVING ENERGY
METHODS OF USE SOSTIS ENERGY TO DO AND ECONOMY IN FUEL
AND MONEY
In developed countries, as in our country, there is an incredible waste of
energy, and the "civilized" man consumes more and more goods. So do not
realize that fossil fuels (which uses more) will end soon and that the use of
incurring more and more the world (mainly carbon dioxide) with devastating
effects on the environment and ultimately our own lives.
You children are tomorrow's citizens will live in the future effects of energy
dissipation of large, need to understand and apply the following simple rules,
and so that the fuel last longer and the environment are protected.
HEAT INSULATION
Motivate your parents to put double glazing and insulate the roof and the roof
of the pilot.
If there are cracks around doors and windows close them with an insulating
material.
HEATING
On cold winter nights close the shutters of the windows and curtains to keep
the heat inside your home.
On cold winter nights are best wearing a warm sweater rather than rising over
heating.
AIR CONDITIONING - DROSISMOS
When using the air conditioner in the windows and doors should be closed.
63
On warm summer days the shutters of the windows should be closed to avoid
the sun enters your home.
Your summer nights open doors and windows to ventilate - and-cool your
home.
LIGHTING
Always turn off the lights when there is someone in the room.
During the day open the windows and curtains to the sun illuminate your
home.
64
have brilliant PRESENT AND FUTURE IN DEVELOPING COUNTRIES, AND
NOT ONLY. Disadvantaged stability to strong winds and CONDITIONS IN
LOW ILIOFANEIAS. Fails to maintain on much the heat inside to cook
SKEFOS, WHICH IS WITHIN THE BAG OR inverted glass bowl, particularly
when the Sun disappears behind the clouds for a long time.
Parabolic and semi cylindrical OVENS
Parabolic solar oven are convex, concave Records, often resembles a large
plate, where Solar radiation is reflected and concentrated in one place, where
the cook SKEFOS FOUNDED. THE ADVANTAGE IS THAT THEIR dishes
cooked almost as fast and at SYMVATIKOUS ILEKTRIKOUS FOURNOUS.
DISADVANTAGES AS can allocate THE DIFFICULTIES IN THE
CONSTRUCTION AND THE ADJUSTMENTS TO OFTEN TO THE COURSE
OF THE SUN SO to focus properly. THERE IS ALSO the possibility of causing
burns or TRAFMATISMOUS eyes, IF NOT USED CORRECTLY, WITH
ATTENTION AND KEEPING SAFETY RULES. THE semi cylindrical solar
oven is essential Half drum with appropriate Shaped the inside, OF to have
ANAKLASTIKES PROPERTIES.
65
ΦΤΙΑΞΤΟ ΜΟΝΟΣ ΣΟΥ
66
http://el.list-of-
companies.org/Details/10178348/China/himin_solar_energy_group/
67
Abstract
A thin-film flexible solar cells built on a plastic substrate
includes a p-cadmium telluride layer of cadmium sulphide and
n-type layer sputter deposited on a plastic substrate at a
temperature low enough to avoid damaging or melting the
plastic and to minimize crystallization of cadmium telluride. A
transparent conductive oxide layer covered with a network of
bus line has been deposited over the n-type layer. A back
contact layer of conductive metal is deposited beneath the p-
type layer and above the current collection circuit. The
semiconductor layers may be amorphous or polycrystalline
structure
Other References
68
• Espinoza-Beltran, F. J., Influence Of The Substrate Temperature On
The Structure And Surface Roughness Of Cd0.18 Sb0.64 Te0.18 films, Journal
of Materials Science, 32:3201-3205 (1997)
• Fukuda, Mitsuo, "Optical Semiconductor Devices," John Wiley &
Sons, Inc. (1999)
• Gessert, T. A., Development Of rf Sputtered, Cu-Doped ZnTe for
Use as a Contact Interface Layer to p-CdTe, Journal of Electronic
Materials, vol. 24(10):1443-1449 (1995)
• Quirk, Michael and Serda, Julina, Semiconductor Manufacturing
Technology, Prentice-Hall, Inc. Upper Saddle River, New Jersey 07458
(2001)
• Tomita, Yasuhiro, Carrier Transport Properties of Sputter-Deposited
CdS/CdTe Heterojunction, Jpn. J. Appl. Phys., vol. 32:1923-1928 (1993)
• Tomita, Yasuhiro, Properties of Sputter Deposited CdS/CdTe
Heterojunction Photodiode, Jpn. J. Appl. Phys., vol. 33:3383-3388 (1994)
• Tomita, Yasuhiro, X-Ray Imaging Camera Tube Using Highly
Sensitive CdTe Photoconductive Film, SPIE, vol. 2173:153-160 (1994)
• Tomita, Uasuhiro, "X-Ray Imaging Camera Tube Using Sputter-
Deposited CdTe/CdS Heterojunction," IEEE Transactions on Electron
Devices, vol. 33(2):315-319 (1993)
• Xiao, Hong, "Introduction to Semiconductor Manufacturing
Technology," Prentice-Hall Inc., Upper Saddle River, New Jersey 07458
(2001)
• Zapata-Torres, M., "Large Grain Size CdTe Films Grown On Glass
Substrates At Low Temperature," J. Vac. Sci. Techn., A 13(6):2994-2996
(Nov./Dec. 1995)
• Zelaya, O., "Large Grain Size CdTe Films Grown On Glass
Substrates," J. Appl. Phys., 63(2):410-413 (Jan. 15, 1988)
• "Solar Engery Online--sputtering,"
http://wire0.ises.org/wire/glossary.../
ceb6530bcd4d7713c125664e00453059!OpenDocumen, Printed May 15,
2001
• "Absorption Coefficient," http://wire0.ises.org/wire/glossary.../
d338eda3f810b1a0c125664b004d89e0!OpenDocumen, Printed May 15,
2001
• "Intrinsic Semiconductor," http://wire0.ises.org/wire/glossary.../
e0397d4ef1cec125664e00448402!OpenDocumen, Printed May 15, 2001
• "Band Gap Energy (eg)," http://wire0.ises.org/wire/glossary.../
fbe42f37e6d7d7c1c125664c0055e79c!OpenDocumen, Printed May 15,
2001
• "Substrate," http://wire0.ises.org/wire/glossary.../
9b4895480f002393c125664e0045353b!OpenDocumen, Printed May 15,
2001
69
• Superstate, http://wire0.ises.org/wire/glossary.../
f481898dfb6ccc569ac125664e00453918!OpenDocumen, Printed May 15,
2001
• "What is Photovoltaics?" http://www.daystartech.com/whatpv.htm,
Printed Feb. 20, 2001
• ".oe butted.Solar Cell Manufacturing Technology,"
http://www.nedo.go.jp/3color-e/shinene/taiyo-1.html, Printed Feb. 20,
2001
• "NREL Achieves World Record Performance For Thin Film Solar
Cell Technology," http://www.nrel.gov/hot-stuff/press/thinfilm.html,
Printed Feb. 20, 2001
• "World-Record Solar Cell A Step Closer To Cheap Solar Energy,"
http://www.nrel.gov/hot-stuff/press/999world.html, Printed Feb. 20, 2001
• "Material And Device Development,"
http://www.nrel.gov/ncpv/cadmium.html, Printed Feb. 20, 2001
• "Manufacturing and Deployment,"
http://www.nrel.gov/ncpv/cdteteam.html, Printed Feb. 20, 2001
• "Thin Films: Past, Present, Future,"
http://www.nrel.gov/ncpv/documents/thinfilm.html, Printed Feb. 20, 20
70
•
71
72
73
74
75
Thin film solar cell and production method therefor
A method for producing a thin film-solar cell having a thin film-active layer in a
graphite sheet substrate includes the steps of adhering two sheets of graphite
together, forming a thin semiconductor films acting as active layers for the
second main surface two sheets of graphite, which separates the two graphite
sheets from each other. In this structure, the stress caused by a difference in
rates of expansion between the top sheet and the semiconductor thin film has
been canceled by the stress caused by a difference in expansion rates
between the lowest and package semiconductor thin film. Therefore, curvature
of the substrate is prevented under which the next steps of the process easy
out. Moreover, the number of products per unit time is doubled, thereby
increasing productivity
DESCRIPTION An object of this invention is to provide an inexpensive thin film
solar cells with high efficiency and reliability that are produced in a simple
process and a method for producing both thin film solar cells.
It is another object of this invention provides a method for continuously
producing a thin film semiconductor device used after being separated from a
substrate.
It is yet another object of this invention to provide a very reliable method for
connecting a plurality of solar cells with high mechanical strength in a simple
and highly reliable components of solar cells produced with the method.
Other objects and advantages of the present invention will appear from the
detailed description given below.
It should be understood, however, that the detailed description and specific
incarnations given as a guide only various changes and modifications in the
spirit and scope of the invention will appear to those skilled in the art from this
detailed description.
According to a first aspect of the present invention, a method for producing a
thin film solar cell, a graphite sheet substrate is heated directly by heating high
frequency, while a thin film is formed on the substrate. Therefore, the substrate
is heated by high performance do not damage the substrate.
According to a second aspect of the present invention, a method for producing
a thin film solar cell and a graphite sheet substrate beltlike passes
successively through the chambers of reaction, a thin film semiconductor
active layer formed on a substrate, a cap layer, as as a layer of silicon oxide or
silicon nitride layer, then formed in the thin film semiconductor active layer and
the thin film semiconductor active layer is melted and recrystallized to increase
76
the diameter of crystal grains of the semiconductor active layer and covered
with a mattress cover . Therefore there is a thin film is encapsulated
Soluble precursor to poly (cyanoterephthalydene) and method of preparation
The above described problems and others are substantially solved and the
above purposes and others are realized in a method of preparing PPV
derivatives including ...
Complementary junction heterostructure field-effect transistor
It is a primary object of the present invention to obviate the problems of the
prior art complimentary III-V field-effect transistors. Another object of the
present ...
Magnetic field sensor on elemental semiconductor substrate with electric field
reduction means
It is, therefore, an object of this invention to provide a magnetic field sensor of
an indium antimonide film or indium arsenide film supported on an
elemental ...
Method of preparing InSb thin film
An object of the present invention is to provide a method of preparing an InSb
thin film, which can form an InSb thin film having high mobility on a surface of
the ...
Organometallic fluorescent complex polymers for light emitting applications
The above described problems and others are at least partially solved and the
above purposes are realized by a method for the preparation of a fluorescent
complex ...
Method and apparatus for manufacturing semi-insulation GaAs monocrystal
Accordingly, it is the object of the present invention to provide a method of
manufacturing a semi-insulation GaAs monocrystal by controlling carbon
concentration during ...
Semiconductor luminous element with light reflection and focusing
configuration
OF THE INVENTION FIG. 1 (a) shows a cross section of semiconductor
luminous element A, a surface-emitting element which is a first preferred
embodiment of this ...
Hydro-air renewable power system
To achieve the foregoing and other objects, and in accordance with the
purposes of the present invention, as embodied and broadly described herein,
the apparatus of this ...
Electrodes comprising conductive perovskite-seed layers for perovskite
dielectrics
As used herein, the term "high-dielectric-constant" means a dielectric constant
greater than about 50 at device operating temperature. As used herein the
term "...
Nitride based semiconductor device and manufacture thereof
It is an object of the present invention to address the above problems and
provide a nitride semiconductor device, in particular a semiconductor light
77
emitting device ...
http://www.nrel.gov/technologytransfer/ip/search_ip.php/solar
The Patent Description & Claims data below is from USPTO Patent
Application 20090214763, Preparation of thin film for solar cell using paste.
78
0017727 filed on Feb. 27, 2008, all of which is incorporated herein by
reference in its entireties for all purposes.
FIELD OF THE INVENTION
The present invention relates to a method for preparing a CIS (Copper-Indium-
Selenide)-based or CIGS (Copper-Indium-Gallium-Selenide)-based thin film
for a light absorption layer of a solar cell.
BACKGROUND OF THE INVENTION
79
paste or ink that you are using no toxic gases or selenium H2Se. According to
the present invention, if there is a method for preparing a CI (G) S-based thin
film, comprising the steps of:
• (2) Se added to the precursor mixture or a mixture of oxide and adding the
mixture in an aqueous or alcohol solvent to obtain a paste
And
• (3) coating the paste on a substrate and heating the coated substrate in an
inert atmosphere or reducing gas. The present invention also provides a CI (G)
S-based thin film
The method of the present invention using a paste does not require the use of
vacuum equipment and minimizes the loss of raw materials and hence
production costs are low. Moreover, the method of the present invention does
not employ toxic fumes or gases H2Se Se, so that the manufacturing process
safe. Besides, this method can be applied to various types of substrates, and
is easy to check the voltage and current of solar cells obtained by controlling
the band gap energy by adjusting the composition of raw materials
This application claims priority from Korean patent application No. 10-2008-
0017727 filed on Feb. 27, 2008, all of which is incorporated herein by
reference in its entireties for all purposes.
FIELD OF THE INVENTION
The present invention relates to a method for preparing a CI (G) S-based thin
film, CIS (copper-indium-selenide)-based or CIGS (copper indium-gallium-
selenide-)-based thin film on a light absorption layer of solar cells.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other objects and features of the present invention will appear from
the following description of the invention, when taken in conjunction with the
accompanying drawings, which are respectively:
FIG. 1: an example of the method for the preparation of CI (G) S-based thin
film of the present invention;
FIG. 2: a standard XRD oxide CIGS (CuInGaO4) prepared in Example 1
FIG. 3: XRD diagram of the CIGS thin film prepared in Example 1
FIG. 4: XRD diagram of the CIGS thin film prepared in Example 2
FIG. 5: XRD diagram of the CIGS thin film prepared in Example 3
FIG. 6: XRD diagram of the CIGS thin film prepared in Example 4.
DETAILED DESCRIPTION OF THE INVENTION
Henceforth, CI (G) refers to a copper or copper-indium-gallium-indium, and CI
(G) S-mentioned copper-indium selenide and copper indium-gallium-selenide-.
The inventive method for preparing a CI (G) S-based thin film using a paste or
80
ink will be explained with reference to FIG. 1.
In the first stage of the method in accordance with the present invention, the
precursors of Cu, In, Ga and optionally mixed to prepare a CI (G) a mixture of
precursor (100), and optionally the mixture is heated to obtain CI (G) oxide the
mixture (101). The mole ratio of precursors Cu, Ga In and used in this step is
1:0.5:0 to 1:2:2, preferably 1:0.8:0.8 to 1:1.2:1.2.
The precursors of Cu, Ga and In can be any corresponding hydroxide, nitrate,
sulfate, acetate, chloride, acetylacetonate, formate, or oxide. The metal
precursors are mixed preferably in the form suspended in water or alcohol with
a pH of less than 10 or preferably 4 to 9.
The optional heat treatment of the precursor mixture can be conducted at a
temperature of 500 to 900 ° C., preferably 650 με approximately 800 ° C after
drying the mixture at room temperature.
In the second stage of the method in accordance with the present invention,
the CI (G) a precursor mixture or a mixture of oxides prepared in the first step
is mixed with Se precursor to receive CI (G) S precursor mixture (102, 103),
which added to an aqueous, alcohol, soda or glycol solvents and stirred to
prepare CI (G) S paste or ink (105). The mole ratio of CI (G) a precursor
mixture or a mixture of oxide and Se precursor used in this step is 1:0.5 to 1:2.
The CI (G) S precursor mixture prepared by the process 102 or 103 may be
81
heated to obtain CI (G) S powder (104). The heat treatment is conducted
preferably in a reducing atmosphere at temperature of 200 με around 700 ° C,
preferably 350 με 550 ° C. The CI (G) S powder of the present invention can
be dispersed in a solvent with optional dispersion agent and / or binder for the
preparation of CI (G) S paste.
In the third step of the method in accordance with the present invention, the
paste or ink prepared in the above step is coated with a substrate, and the
investment has been heat treated to obtain CI (G) S-based thin film (106) . The
substrate can be any material which is conductive and stable at 300 ° C. or
larger, eg, ITO (Indium Tin Oxide) or FTO (fluorine-doped Tin Oxide) glass,
metal foil, metal plate or conductive polymer material.
The coating of the paste or ink may be carried out by conventional means, for
example, using a method of coating with spaoula, screen coating, spin coating,
spray coating or paint coating. The thickness of the coating can be in the
range of 0.5 to 10 micrometers.
The thermal treatment of pulp and the ink coating can be carried out under an
inert gas and / or reducing gas atmosphere, preferably H2/Ar mixed gas,
temperature of 200 με around 700 ° C, preferably 350 to 550 ° C.
The thermal treatment of pulp and the ink coating can be made in ambient
atmosphere at 100 to 400 ° C followed by heat treatment under an inert gas
and / or reducing gas atmosphere above3 to 6 feature that peaks (112) and
(220) / (204) of CIGS is dominant, which shows that CIGS thin film and powder
were CIGS.
Although the invention has been described in relation to these specific
incarnations should be recognized that various modifications and changes
may be made to the invention by a qualified professional who also fall within
the scope of the invention as defined by the requirements attached
Patent Claims The Patent Description & Claims data below from USPTO
Patent Application 20090214763, Preparation of thin film solar cells using
paste.
What is required are:
1. A method for preparing a CIS (copper-indium-selenide)-based or CIGS
(copper indium-gallium-selenide-)-based thin film on a light absorption layer of
solar cells, comprising the steps of:
(1) mixing precursors of Cu and In, optionally with a precursor of G'A to obtain
a mixture, and optionally heating the mixture to obtain a mixture of oxides
(2) Se added to the precursor mixture or a mixture of oxide and adding the
mixture in an aqueous or alcohol solvent to obtain a paste
(3) coating the paste on a substrate and heating the coated substrate in an
inert atmosphere or reducing gas.
82
3. The method of claim 1, where the precursors of Cu, In and Ga optionally
mixed in a molar ratio of 1:0.5:0 to 1:2:2.
6. The method of claim 1, where the heat treatment in step (1) conducted at a
temperature of 500 to 900 ° C.
7. The method of claim 1, which are the precursors of Cu, In, Ga and
optionally mixed with water and avoid alcohol in step (1), optionally, a pH 10 or
below.
11. The method of claim 9, where the substrate is ethyl cellulose, palmitic acid,
polyethylene glycol, polypropylene glycol, polypropylene carbonate, or mixture
thereof.
12. The method of claim 1, which contains a sulfur compound added yet in
step (1) or (2).
13. The method of claim 12, where the sulfur-containing compound is H2S,
RSH (where R is alkyl or carboxyalkyl), thioacetamide or Na2S.
14. The method of claim 1, where one or more elements selected from the
group consisting of Na, K, Ni, P, As, Sb, Bi and added further as a dopant in
step (1) or (2).
15. The method of claim 1, where the coating in step (3) is the method of
coating blade doctor, screen coating, spin coating, spray coating or paint
coating.
83
16. The method of claim 1, where the heat treatment in step (3) conducted at a
temperature of 200 to 700 ° C.
17. The method of claim 1, where the reduction of gas in step (3) is hydrogen
gas.
18. The method of claim 1, where the heat treatment in step (3), carried out at
room temperature at 100 to 400 ° C followed by heat treatment under an inert
atmosphere or reducing gas.
19. The method of claim 1, where the thickness of the coating obtained in step
(3) is about 0.5 to 10 micrometers.
20. A CIS based or based on CIGS thin film prepared by the method of claim
1.
22. A CIS based or based on CIGS powder prepared by the method of claim
21
84
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Sintering/Alloying by One-directional Reverse Illumination
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Solutions of Si in Cu/Al Solvent
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Hydrogen Content, Hydrogenated Amorphous Silicon at High
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Technique
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• U.S. Patent 6,239,354 - Electrical Isolation of Component Cells in
Monolithically Interconnected Modules
• U.S. Patent 6,332,967 - Electro-deposition of Superconductor Oxide
Films
• U.S. Patent 6,859,297 - Electrochromic Counter Electrode
• U.S. Patent 6,441,942 - Electrochromic Projection and Writing
Device
• U.S. Patent 5,377,037 - Electrochromic-Photovoltaic Film for Light-
Sensitive Control of Optical Transmittance
• U.S. Patent 5,356,839 - Enhanced Quality Thin Film
Cu(In,Ga)Se.sub.2 for Semiconductor Device Applications by Vapor-
Phase Recrystallization
85
• U.S. Patent 5,429,985 - Fabrication of Optically Reflecting Ohmic
Contacts for Semiconductor Devices
• U.S. Patent 5,342,453 - Heterojunction Solar Cell
• U.S. Patent 5,316,593 - Heterojunction Solar Cell with Passivated
Emitter Surface
• U.S. Patent 6,908,782 - High Carrier Concentration P-Type
Transparent Conducting Oxide Films
• U.S. Patent 5,897,331 - High Efficiency Low Cost Thin Film Silicon
Solar Cell Design and Method For Making
• U.S. Patent 6,201,261 - High Efficiency, Low Cost, Thin Film
Silicon Solar Cell Design and Method For Making
• U.S. Patent 5,426,061 - Impurity Gettering in Semiconductors
• U.S. Patent 5,897,715 - Interdigitalized Photovoltaic Power
Conversion Device
• U.S. Patent 6,281,035 - Ion-Beam Treatment to Prepare Surfaces of
p-CdTe Films
• U.S. Patent 6,815,736 - Isoelectronic Co-doping
• U.S. Patent 6,300,557 - Low-Band Gap Double-Heterostructure
InAsP/GaInAs Photovoltaic Converters
• U.S. Patent 6,852,371 - Metal processing for impurity gettering in
silicon
• U.S. Patent 4,942,299 - Method and Apparatus for Differential
Spectroscopic Atomic Imaging Using Scanning Tunneling Microscopy
• U.S. Patent 7,122,736 - Method and Apparatus for Fabricating a
Thin-Film Solar Cell Utilizing a Hot Wire Chemical Vapor Deposition
Technique
• U.S. Patent 5,304,534 - Method and Apparatus for Forming High-
Critical-Temperatures Superconducting Layers on Flat and/or Elongated
Substrates
• U.S. Patent 6,441,896 - Method and Apparatus for Measuring
Spatial Uniformity of Radiation
• U.S. Patent 5,426,569 - Method and Apparatus for Simulating
Atmospheric Absorption of Solar Energy Due to Water Vapor and
CO.sub.2
• U.S. Patent 7,300,890 - Method and apparatus for forming
conformal SiN.sub.x films
• U.S. Patent 6,713,400 - Method for Improving the Stability of
Amorphous Silicon
• U.S. Patent 5,047,112 - Method for Preparing Homogeneous Single
Crystal Ternary III-V Alloys
• U.S. Patent 5,627,081 - Method for Processing Silicon Solar Cells
86
• U.S. Patent 5,441,897 - Method of Fabricating High-Efficiency
Cu(In, Ga)Se.sub.2 Thin Films for Solar Cells
• U.S. Patent 6,787,385 - Method of Preparing Nitrogen Containing
Semiconductor Material
• U.S. Patent 5,487,792 - Molecular Assemblies as Protective Barriers
and Adhesion Promotion Interlayer
• U.S. Patent 5,391,896 - Monolithic Multi-Color Light
Emission/Detection Device
• U.S. Patent 5,322,572 - Monolithic Tandem Solar Cell
• U.S. Patent 5,019,177 - Monolithic Tandem Solar Cells
• U.S. Patent 6,281,426 - Multi-Junction, Monolithic Solar Cell Using
Low-Band-Gap Materials Lattice-Matched to GaAs or Ge
• Trademark 7,309,832 - Multi-junction solar cell device
• U.S. Patent 7,229,498 - Nanostructures Produced by Phase-
Separation during Growth of (III-V).sub.1-x(IV.sub.2).sub.x Alloys
• U.S. Patent 7,179,665 - Optical Method for Determining the Doping
Depth Profile in Silicon
• U.S. Patent 5,577,157 - Optical Processing Furnace with Quartz
Muffle and Diffuser Plate
• U.S. Patent 5,452,396 - Optical Processing Furnace with Quartz
Muffle and Diffuser Plate
• U.S. Patent 6,275,295 - Optical System for Determining Physical
Characteristics of a Solar Cell
• U.S. Patent 6,436,305 - Passivating Etchants for Metallic Particles
• U.S. Patent 5,922,142 - Photovoltaic Devices Comprising Cadmium
Stannate Transparent Conducting Films and Method for Making
• U.S. Patent 6,169,246 - Photovoltaic Devices Comprising Zinc
Stannate Buffer Layer and Method for Making
• U.S. Patent 6,458,254 - Plasma and Reactive Ion Etchning to
Prepare OHMIC Contacts
• U.S. Patent 5,976,614 - Preparation of CuInSe.sub.2 Precursors
Films and Powders by Electroless Deposition
• U.S. Patent 5,785,837 - Preparation of Transparent Conductors,
Ferroelectric Memory Materials and Ferrites
• U.S. Patent 5,711,803 - Preparation of a Semiconductor Thin Film
• U.S. Patent 6,137,048 - Process for Fabricating Polycrystalline
Semiconductor Thin-Film Solar Cells, and Cells Produced Thereby
• U.S. Patent 6,281,098 - Process for Polycrystalline Film Silicon
Growth
• U.S. Patent 5,541,118 - Process for Producing Cadmium Sulfide on
a Cadmium Telluride Surface
87
• U.S. Patent 6,518,086 - Processing Approach Towards The
Formation Of Thin-Film CU(IN,GA)SE2
• U.S. Patent 5,731,031 - Production of Films and Powders for
Semiconductor Device Applications
• U.S. Patent 6,369,603 - Radio Frequency Coupling Apparatus and
Method for Measuring Minority Carrier Lifetimes in Semiconductor
Materials
• U.S. Patent 6,251,183 - Rapid Low-Temperature Epitaxial Growth
Using a Hot-Element Assisted Chemical Vapor Deposition Process
• U.S. Patent 7,329,554 - Reactive Codoping of GaAlInP Compound
Semiconductors
• U.S. Patent 5,436,204 - Recrystallization Method to Selenization of
Thin-Film Cu(In,Ga)Se.sub.2 for Semiconductor Device Applications
• U.S. Patent 6,984,263 - Shallow Melt Apparatus for Semicontinuous
Czochralski Crystal Growth
• U.S. Patent 5,376,185 - Single-Junction Solar Cells with the Optium
Band Gap for Terrestrial Concentrator Applications
• U.S. Patent 6,872,378 - Solar Thermal Aerosol Flow Reaction
Process
• U.S. Patent 7,033,570 - Solar-Thermal Fluid-Wall Reaction
Processing
• U.S. Patent 6,126,740 - Solution Synthesis of Mixed-Metal
Chalcogenide Nanoparticles and Spray Deposition of Precursor Films
• U.S. Patent 7,067,850 - Stacked Switchable Element and Diode
Combination
• U.S. Patent 5,384,653 - Stand-Alone Photovoltaic (PV) Powered
Electrochromic Window
• U.S. Patent 4,963,949 - Substrate Structures for InP-Based Devices
• U.S. Patent 5,785,769 - Substrate for Thin Silicon Solar Cells
• U.S. Patent 5,401,331 - Substrate for Thin Silicon Solar Cells
• U.S. Patent 5,581,346 - System for Characterizing Semiconductor
Materials and Photovoltaic Device
• U.S. Patent 5,757,474 - System for Charactrizing Semiconductor
Materials and Photovoltaic Devices Through Calibration
• U.S. Patent 5,588,995 - System for Monitoring the Growth of
Crystalline Films on Stationary Substrates
• U.S. Patent 6,221,495 - Thin Transparent Conducting Films of
Cadmium Stannate
• U.S. Patent 7,053,294 - Thin-Film Solar Cell Fabricated on a
Flexible Metallic Substrate
• U.S. Patent 7,109,818 - Tunable Circuit for Tunable Capacitor
Devices
88
• U.S. Patent 5,166,761 - Tunnel-Junction Multiple Wavelength
Light-Emitting Diodes
• U.S. Patent 5,747,099 - Two Chamber Reaction Furnace
• U.S. Patent 6,820,509 - Ultra-Accelerated Natural Sunlight
Exposure Testing Facilities
• U.S. Patent 5,909,632 - Use of Separate ZnTe Interface Layers to
Form OHMIC Contacts to p-CdTe Films
• U.S. Patent 5,712,187 - Variable Temperature Semiconductor Film
Deposition
• U.S. Patent 5,882,412 - Vertical Two Chamber Reaction Furnace
• U.S. Patent 7,095,050 - Voltage-Matched, Monolithic, Multi-Band-
Gap Devices
• U.S. Patent 7,095,050 - Voltage-Matched, Monolithic, Multi-Band-
Gap Devices
• U.S. Patent 7,238,912 - Wafer Characteristics via Reflectometry and
Wafer Processing Apparatus and Method
• U.S. Patent 7,179,677 - ZnO/Cu(InGa)Se, Solar Cells Prepared by
Vapor Phase Zn Doping
89
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92
hi
min solar energy group
The Iimin Solar Energy Group Solar Energy, Ltd Dezhou Chaina, founded in
1995, is a large private limited liability company integrating R & D,
manufacturer and marketing. The company has approx. 330ha area of land,
4,000 staff members operating Dezhou and more than 50,000 workers
nationally. According to statistics from 2004, Himin Group produced 1 million
units / sets the product and became the largest solar energy product
manufacturing base and clean energy supplier in the world. The company was
among the top 30 private companies in terms of taxation, one of the top 5
93
brands of the influence of home appliances throughout the country and the
exclusive "Chinese famous brand" in the solar energy industry was measured
signal of RMB5.1 billion yuan.
The group has dozens of existing and branches in the country and abroad,
such as solar water heater factory, vacuum tubes of plants, plant electronics,
win-pin power savings glass company, solar business, the construction
business section, ECS business services The solar real estate company,
Nanjing Electronic Research Institute, Central Research Institute, Europe R &
D center, etc.
The group has recently launched four national projects under the project 863,
which is nearly 200 patents, established independent intellectual property and
entered into photovoltaics, winpin energy saving glass, building integration of
solar energy and other sectors to produce solar water heater, heating vacuum
collecting tubes, large solar water heating system, Dongguan domestic water
heating center and similar product lines that have won dozens of national
awards.
The Group has invested 1 billion Yuan in the construction of "international
environmental friendly Energy Saving Demonstration Zone" and "Chinese
Solar Energy Demonstration City", the projects are implemented, including
several buildings incorporating solar energy, solar energy park, solar energy
Testing Center, Chinese college renewable resources, solar energy stage, the
solar photovoltaic applications and solar energy museum, etc. After completion
of the project team will become the center of the world solar cooling mode,
power generation, desalination of sea water, photo - thermal and photovoltaic
full recovery, world-class R & D and testing, manufacture and distribution of
scientific publication. In terms of core technology and R & D, the Group has
signed agreements with the Fraunhofer Institute and the University of Sydney
and began regular strategy will Himin R & D public perception of the core.
The Group has granted the title of "key new high-tech enterprise under the
National Programme Lens" and has four national projects within the project
and 863 national allowance with interest. Dr. Zhang Qichu, the "king of film
coating in the world, has participated in Himin Solar let the smooth cooperation
between Himin and the world of technology candidates. The Chinese
Academy of Sciences Laboratory Himin Solar Energy and State of residence
and domicile Environment Engineering Institute established jointly Solar
Architecture Integration Technology Research Institute in Beijing. and called
the first scientific and technical conference which highlighted Himin core
competitiveness. During the 4th China International Exhibition Residence
Industry, Himin solar building heat sink end won the prize technology and
product innovation issued by the Ministry of Public Works, which was the first
product to ever win such a title.
The Chinese Academy of Sciences Himin Solar Energy Laboratory has
successfully performed the experiment of sunlight and solar heat collection
94
and solar energy air-condition introduced three-high "solar core technology is
a world leader in Australia for the production of three high-vacuum tubes (anti-
high temperature, low temperature and high shielding efficiency).
Basic legal foundation for the development and deployment of clean energy is
the Law for RES / Renewable Energy Law (REL), valid from 1/1/2006.
An interesting feature is that it provides for the imposition of penalties for non-
compliance of which will contribute to better implementation.
The main objective of REL is the commercialization of new energy sources,
making them able to compete directly with conventional energy. Specifically,
the REL is designed to create:
- Conditions for development of RES market
- Financial system.
- Demarcation of the boundaries of private and state responsibility programs
RES
The basic principles of REL forms the combination of national and
international practice. In China there are already some cities (such as
Guanzhou) with significant experience in new forms of energy.
However, the experience is relatively small and require the assistance of
countries with a tradition of expertise in specific subject, such as the USA and
European countries.
O REL emphasis on specific training objectives, both at central government
level and at provincial level. These goals should identify prospects - potential
development of renewable energy per province, installation costs, sales prices.
Especially in terms of sales prices, renewable energy has the special feature
that the initial investment cost is high, gradually, however, reduced
manufacturing costs and create economies of scale and, therefore, the prices
should be adjusted accordingly. Furthermore, the REL provides government
financial support for renewable energy is a new form of energy that needs
government boost. In particular, it required special government funds:
development research for the development of New Energy in the border areas
of China, adopting preferential policies to reduce the cost of investment,
measures to encourage entrepreneurship in the energy sector policies
96
removing existing barriers, etc. However, the effective implementation of REL,
required: 12 training texts implementation by relevant Chinese authorities,
which have not yet completed.
- At local government level, introduce necessary legislative framework derived
under REL, which will facilitate the development of RES, as it puts the
necessary mechanisms for simplifying procedures, encouraging the
involvement of non-state actors., evaluating the enforcement activities of REL,
etc.
- Conducting a feasibility study of market and industry RES in the provinces of
China. - Allocation of responsibilities between central government and local
governments.
The REL is considered to be too general and does not contain the required
specific provisions to enable the immediate application. We have possibly
improved in word processing and the Law issue clarifying rules. As China is
still a basic law regulating the issues of development and management of
energy, is expected to be a significant contribution of the adoption of a new
Law on Energy, the process which began in 2006, without, however, has yet to
determine years of its adoption by the National Assembly (National People's
Congress).
Under the draft Law, the term "energy" includes both conventional energy
(fossil fuels like coal and crude oil, natural gas, electricity, hydro, nuclear) and
RES (Solar, wind, geothermal, photovoltaic, etc.). Objectives of the passage of
the Energy Law is to create an effective regulatory framework for the
development, operation and management of various energy sources and
support energy security of China by providing a streamlined system of stable
and inexpensive energy supply. In terms of policies, enact legislation, in
preference:
- The gradual replacement of fossil fuels from RES
- The use of high performance clean energy and low carbon emissions,
replacing high emissions. The draft law provides that the competent body for
the formulation of national energy strategy as the Council of State, in the long
term 20-30 years, adjusted for energy policy every five years depending on the
developments and needs of the country, while main body of the national
energy policy and market regulation RES the National Energy Authority.
Although not yet adopted the new Law on Energy, National Energy Authority
was established by the State Council, in July 2008. The draft Law also
provides for the establishment of independent province by Departments on
energy, which under the Local Government on the management of energy
issues at the local level. Because the area of energy is of paramount
importance to national interests and security for government control of "key
areas of energy," without specifying further term. In practice, government
control is:
- Approval by the National Energy Authority business plans (projects) on
97
development and exploitation of energy sources that are considered essential
to the national security, such as oil, natural gas, nuclear
- Especially for the construction and operation of nuclear power stations, the
approval of the State Council
- Projects involving the development and operation of hydro and ocean energy
must be approved by the National Energy Authority at the central level and
local authorities operations scheduled to be established at provincial level
- Projects involving the development and exploitation of solar, wind or bio-
energy must be approved by the Local Authorities Energy is expected to be
established at provincial level.
Moreover, foreign investment in the energy sector are subject to restrictions
as government control, participation of Chinese partner (the required type of
company is typically the Joint Shareholders Company), special permits, etc.
The vote in the Energy Act provides for a comprehensive guide to foreign
investment in the energy sector, which should indicate the favorable policies to
encourage foreign investment in clean energy.
INTERNATIONAL PV market
With unprecedented growth driven by the global photovoltaic market in recent
years, particularly through the programs of three countries that are the
barometer for the development of this technology: Germany, Japan and the
U.S.. New dynamic players such as China and Spain are currently entering the
game, with new production units and comprehensive measures to support and
encourage
solar electricity. For the sixth consecutive year, the international photovoltaic
industry shows growth rates close to 50%, showing that development is not a
cyclical event, but a substantial progress fueled by generous aid policies of the
produced solar electricity. In 2005, the photovoltaic industry had an increase of
44% of volume sales, 50% to 149% revenue and profits. The demand today is
more than twice the
supply. The major problem has arisen in the last two years (the inability to
obtain sufficient raw material, high purity silicon) seems to be finally settled.
Many new units already under construction worldwide and at the end of 2008,
quadrupling the available raw material for production of photovoltaic. From that
year estimated that prices will get back something like the traditional case for
decades (and not applied the last two years due to lack of sufficient stock).
The following table summarizes the expected trends in 2010 (Photon
Consulting, September 2007).
100
Ηλιακός χαρτοφύλακας
JUICE BAG ES300 - Ηλιακό σακίδιο
MESSENGER πλάτης JUICE Ηλιακό σακίδιο
BAG ES100 - JUICE BAG ES200 -
209.00€ DAYPACK
BACK PACK
229.00€ 189.00€
The Power pockets are ideal for portable solar power for all the needs of
outdoor activities. Built with technology thin film, providing an excellent
solution for excursions, hiking, camping, outdoor sports and outdoor activities
requiring lightweight and flexible portable energy in life. With Power Pocket
charge the batteries your electronic pocket devices: mobile phones, PDA /
Smart Phones, MP3/MP4, iPod, game consoles, digital cameras ... wherever
you are! Keep one in the glove box of your car, put it on Fri-Bruges and keep
the battery charged when your car is immobilized for long periods. The uses
are endless! Folded fit comfortably in your purse or your jacket! The Power
Pocket of 6,5 W is the lightest in its class weighing just 200g while the 12W
Power Pocket weighs only 360gr!
The Autonomous Solar Kit is a complete energy system offered ready with
instructions in Greek and requires no installation expertise, easily placed
anywhere thanks to the clever construction and can be applied anywhere
where you want. It is very easy to install - each kit includes photovoltaic
101
panels, a charge controller, two to six fluorescent fixtures * light flashes,
night rectifier for radio *, converter voltage 220 Volt devices * (eg television),
cable connector for charging mobile, all cables, accessories and installation
instructions. The user only has to buy and add to the system one or more
batteries (depending on the Kit).
Is the solution to provide the basic functioning of electricity in houses,
warehouses, garages, agriculture and animal husbandry facilities, etc. the
power of the sun.
Photovoltaics even though they are the cleanest source of energy today, are a
major obstacle to overcome. Their performance on the percentage of solar
102
radiation can convert into electricity. Current photovoltaic traded have a yield
of between 13-15% approximately. Although significant progress compared to
photovoltaics, which were built 60 years ago (which had just touched yield 6%)
still have not managed to get the maximum efficiency.
To date, many attempts have been made to increase performance to become
a profitable and reliable energy source. Therefore tested various materials and
methods that each element can receive as much as possible sunlight, and
materials that reduce resistance to the transfer of power produced to raise as
much as possible performance. Also made considerable efforts to reduce the
cost of solar to become more accessible to the public.
The UNSW ARC Photovoltaic Centre of Excellence managed to "win" the title
for more efficient solar cell, through the revision of international standards
against which measured the performance of photovoltaics. An understanding
of the weather, and change the colors contained in the spectrum of solar light
during the day, led to a climate model which is an assessment of the cell,
changing both the yield up to now had several companies .
The most favored of all came the UNSW ARC Photovoltaic Centre of
Excellence and this reason that, the cells that produce absorb more light in the
range of blue (which makes more energy content than the other colors of the
spectrum), which according new standards gives a stunning performance of
25%. The yield is really high as it is 6% above the most efficient photovoltaic
today closer than anyone on the threshold of 29% which is the theoretical
maximum of classical photovoltaic silicon. All companies that manufacture
solar panels increased the performance (due to new calibration) but not so
much. Besides the high efficiency of the blue, something similar happens with
the red, but the company needs to develop different techniques to try to
exploit. The company plans to promote directly the photovoltaic market in the
first embodiment after further improvements. The development of photovoltaic
systems to have higher returns, it is necessary nevertheless be combined with
a reliable and relatively inexpensive method of storing excess energy so they
can give energy and night. This would increase their efficiency and
simultaneously made them widely accepted since it might be based there for
the exclusive supply of electric power. So far there have been some
remarkable efforts to save energy from the sun but still a long time to be able
to provide a comprehensive and affordable solution.
About Nanosolar reveals the machine that prints solar.
103
7 months ago here in Medgreece, we had mentioned a company that was to
revolutionize the field of photovoltaics. Then we wrote that the company had
as its goal the following year (ie year) progressed to a larger production. And
finally happened. The Nanosolar has a machine built, which can and prints
(looks like the printing presses that print newspapers), about 30-33 meters
with flexible solar panels per minute. Innovation is the largest field of
photovoltaics is one of the most important steps in the production of cheap
panels, flexible, economical and great posotita.Ta Panel Nasnosolar
economically because instead of using silicon using a mixture of other
materials with which produce a light-sensitive "ink", and "printed on the foil
from the printing machine. The innovation of Nanosolar awarded by Popular
Science magazine as the green innovation chronias.Symfona the company
printing the rate may increase more than 30 meters per minute.
What is the goal of the company? To construct solar panels, which have cost
under $ 3 per W, and be able to invest them with the exterior surfaces of
buildings and homes in order to operate the building to allow more solar
energy. Important advantage: the PV will be virtually invisible, unlike now, and
very oikonomikotera.Parakato, you can see a video machine that prints solar
panels, which cost more than 1.5 million dollars ....
Artificial islands of power to solve the energy problem.
With the pace of ever-increasing energy consumption in the world, the
resources have started running out (oil and fossil fuels in general), which
inevitably leads to higher prices and difficult problems solved. The Western
world is the growing appetite for energy slowly drains the planet and the future
seems rosy, unfortunately. The only solution then is to turn human energy
which is (as we regard them) renewable. Solar, wind, energy from the waves,
geothermal, etc. The green energy sources are even now remain largely
unexplored, although the technology around them in recent years has made
significant progress even in sources which are not idea that we can take
advantage of before. Hence the idea of artificial islands power. The architect
Dominic Michaelis, his son Alex Michaelin, and Trevor Cooper-Chadwick,
developed an idea to bring various ways of exploiting renewable energy
sources in an artificial island that will operate independently and can produce
up to 250 MW ( !) energy. This technique called OTEC (Ocean Thermal
Energy Conversion) and consists of the use of solar energy, wind energy and
also stored in the waters of the ocean in the form of temperature difference.
104
What does last?
In some areas of the ocean, the temperature difference between sea surface
and the water is deep, it is up to 20 degrees Celsius (about 29 degrees to the
surface and about 5 degrees deep). This temperature difference operating
system. In general the system works as follows: The hot water from the sea
used to heat a quantity of liquid ammonia is in a closed container. Ammonia is
converted into gas and "inflated" by initiating a generator which is beginning to
produce electricity. Then cold water from the depths of the sea used to cool
the ammonia again and the cycle repeated. In this way the artificial islands that
will shape the hexagon (to be connected like cells) will produce energy from
wind, sun and sea. It has been estimated that about 50,000 such islands could
meet the needs of the world's energy, and moreover could be used as
desalination plants, and a byproduct of the process is desalinated water
(drinking). The best (which I left it last) is that the project will be implemented
later this year, the company Virgin Earth Challenge. The whole project except
that it seems feasible (since the technology to implement the already exist),
seems to have a bright future and may be the answer to the energy problem in
the future
Green ... solar plants.
The solar circulating is true that not so attractive in appearance. Of course we
care more than once usually placed on the roof of the house, and give us free
energy. Also, by far the solar circulating (at least most) was flat structures
destined for stable placement. But since the flexible solar panels have
appeared all changed ... The solar panels can now find a bunch of new
applications because of their flexibility. A collaboration between Mitsubishi
Corp. of Tokki Corp. and AIST (Japan's National Institute of Advanced
Industrial Science and Technology) has led to the creation of an organic
photovoltaic minutes which can get that shape you want and cut into that
shape you want. The novelty is that color is green (as opposed to the far solar
which should be dark). These solar panels are intended to be used anywhere
appearance is important. Whether this is a building which decorated with
plants such as the photograph or a piece of clothing to be integrated
photovoltaics. For this reason (because it is intended to be used in places
where it can be easily damaged) manufacturers have overlap with a thin layer
of a plastic which protects it from water, oxygen and other stresses. It is worth
mentioning that each sheet from the "green" plant has an area equal to 7.5
105
square centimeters, which means that only 8 leaves reached 60 cm square
area.
Innovation: artificial "leaves" from an artificial plant, producing electricity.
A few days ago we put a vote Medgreece, to gather views on how you see the
implementation of renewable energy in the future. Among the possible
answers was one that indicated a combination of different sources. Today in
this article we present a new approach to energy production from renewable
sources. And what they could do better, apart from something that is inspired
by nature itself? Those who see in the picture and look like little pieces of
paper glued to the table is GROW. What is this? It is a breakthrough in
renewable energy sources, which owes its paternity to a group of designers
named SMIT (Sustainably Minded Interactive Technology). It consists of
several small solar panels, which are pliable and lightweight. The panels are
held in place by an artificial "stalk" (one from a distance on a building like ivy
leaves. They can cover large areas of a building, feeding it with power from the
sun without the heavy, bulky solar panels that we knew until now. As the wind
blows, the "leaves" and swing through small piezoelectric generators situated
at the base of the stems produce energy from wind. It is a structure which
combines both energies in harmony, without the use of wind turbines and solar
panels that are as awkward constructions. sygkkrimeno Although the Project
has been implemented and operated, we've still got 1-2 years to exit the
market. What struck me out of shape is possible (my thought but I find logic) to
begin to place such "sheets" at home and when you want, without major
expense may extend the area of getting new cards and adding them to the
original system. Also this would be practicable and finally in an apartment if
has a balcony that is orientated towards the sun (again my own thinking, rather
than anything else, I say this not to misinform the reader that words are the
designers).
107
way of delivering water.
Warm your home yourself without electricity or fuel consumption!
This invention is something that everyone can with little effort to build and
succeed in a cheap heating without being influenced by current or burners. Of
course, the whole construction has some limitations, for example, can yield
only when it is sunny. But here in Greece believe that the sun is not lacking.
The invention therefore operates much like work and the solar water heater
which decorates every terrace house in Greece. It uses a box which means it
has a surface which is black and does not reflect solar radiation (such as solar
water heater), and a fan from a computer which is powered by a small solar
panel. The result according to the inventor, is that cool air enters the box and
heated by the black surface and then blown into the house. According to him
managed to raise the temperature in a room of 12 degrees Celsius to 29 only
with this system, while outside there was a temperature of 10 degrees Celsius
is certainly significant temperature increase achieved. The truth is, however,
that the materials for the construction is nothing exotic, and do not cost much.
The solar panel guess it is more expensive, but 1st) does not need a big one
and it takes only a small fan, and 2nd) he managed to raise the ambient
temperature by several degrees, would actually make extinction soon. This
system is environmentally friendly and economical. The extra good thing is
that can be manufactured in that size we want, but the fact that it works
automatically, ie when it has enough sunshine and of course stops at night
(sadly ....)
Self Powered Furnace Solar Box
(C) G. Forrest Cook 2002
This work can be powered by a solar kit CirKits power circuit.
(Photo 1) Solar furnace installed in an exterior door
(Figure 1) Expanded layout parts
(Photo 3) Warm air exits from the gate at the top
(Photo 2) The fan pushes cold air into the entrance at the bottom.
This project involves the construction of a robust solar box oven (Photo 1).
With the continuous increase in the price of natural gas and heating oil, the
project becomes more attractive. The assembly of the original materials that I
had been going around my workshop. It is suitable for heating up a small room
or detached shed. I use the microwave to heat my garage that needs to chill a
large enough cold sunny days. It is possible to scale this project up to any
size. A longer version of this furnace can be used to add a lot of supplemental
heat a home.
At night, solar furnace will cause heat loss due to downward convection of cold
air inside the box. This inference can be reduced significantly by bringing the
port of entry to the level of the outlet port with a pipe-right corner. SA formed
the passage of air will cause cold air trapped at the bottom of the box at night.
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Specifications
Rated Voltage: 12VDC
Operating Current: 200MA (depending on the fan)
Heat output: depending on the size of the box, the equivalent of a few hundred
watts when the box is in full sun. Some items such was the solar oven. On a
sunny day with 10 degree C ambient temperature, the furnace was able to
increase the indoor air garage 12 degrees C to 29 ° C. The fan rating air flow
is 30 cubic feet per minute at full speed.
Theory
This is an autonomous and self-powered device. Sun shining black metal
collector plate is absorbed and converted into heat. Sun shines on the solar
panel array powers the blower, which pushes cold air into the bottom frame
(photo 2). The cold air rises as it passes over the plate collector, then the
warmed air exits from the top of the frame (Photo 3). The insulation on the
back of the box prevents the loss of heat from the cold side.
The electronics in this project is quite simple (Figure 2). The array panels
provide enough power to run a 12V fan on the computer. The capacitor
smooths the electrical connection to the fan, so that interruptions to the light
source does not produce sudden changes in engine speed. This should
increase the lifetime of the bearing fan. When there is enough sunlight to heat
the part, there is generally some sunlight to operate the fan. No electrical
controls are necessary. An effective control system fan can be achieved using
a differential temperature control circuit, this would require a solar-charged
12V battery and a charge controller such as PV SCC3. The difference in
temperature control will insure that the fan does not work when the furnace
does not produce useful heat. A big advantage of the system, such that control
may be configured to open when the temperature of the air box is a specific
number of degrees warmer than the room air. This allows the furnace to the air
output is significantly higher than the inside air and the fan only works
intermittantly
Construction
Size depends on the materials you use, consider the space you have to mount
the box and the materials you have at hand. My position is about 2,5 "x 4".
Construct a wooden box out of wood, 2x6, I used a table saw to reduce the 3 /
8 "deep slots near the front edge of the 2x6 box sides. This creates a loophole
for the panel glass to slide into. Screw 2x6 pieces together to form the box.
Surplus shower door, will also make an excellent team of glass as it comes
with an aluminum frame and is made of safety glass. The shower door could
be installed in front of the frame 2x6 and sealed with silicone adhesive. Cut
collection plate to fit inside the box. The collector plate should be about 2
"smaller than the inside of the box, so that air can move up and down and up.
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(Figure 1) The color should be painted flat black, high temperature stove paint
is a good choice. Paint both sides of the collector plate for best results.
Bend the two metal rods in a square shape of U, should keep the metal
collection plate inside the box, so the collector plate is a vacuum both the front
and back. The U bars should fit comfortably in the sides of the box. I placed
the bar in a vise and hammered two sides of a 90 degree bend. Drill four 5 / 64
"holes in each bar, 2 holes for connecting the collector plate and 2 holes for
screwing the bar inside the frame 2x6. The collector plate is connected to the
bar 4 U sheet metal screws. The bars U attached to the inside of the box with
4 screws 2x6 wood.
A 2x2 framework should be shaped in a double H (Fig. 1), its purpose is to act
as a spacer between the back panel and metal plate collector. Screw the 2x2
part inside the box 2x6. In the original version, my 2x2 part narrower than the
box, to match the slope of the rod ends U.
Cut the metal back panel to fit just inside the box 2x6. Using a jig saw, cut
holes in the top and bottom center of the rear panel metal for the conductors
pass. Screw the back panel metal into the back of the frame 2x2.
Cut fiberglass insulation to fit between the rear panel and metal back of the
box 2x6. Cut holes in the fiberglass for the two conductors. Cut the plywood
back panel to cover the bottom of the box 2x6. Cut holes for the 2 pipes on the
back panel. Fiberglass insulation is harmful to the lungs. The insulation should
either be sealed by the state of the air with a silicone adhesive, or a different
type of solid styrofoam as insulation should be used. Disassemble the frame,
color all the pieces of wood deck water seal type. Clean and paint the plate
collector in the black, let it bake in the sun. Reassemble all the painted parts.
Apply a drop of silicone caulk around the edge of the glass panels to keep
water and cold air from leaking in the box.
Install the 2 metal pipes into the holes on the back of the box. The pipelines
will have to go in the box as the metal back panel. Insert the 12V fan on the
back of the lower pipeline. The pipeline can be cut along with a scrap of tin,
about 1 "deep. The resulting sheets of metal shall be scattered and boring to
match the fan mounting holes. Place the fan at the end of the pipeline.
Launch actions are specific to your installation. I installed the framework for an
external wooden doors and cut holes in the door for the conductors pass.
Insulated ducts should be used if the pipelines must pass through an area of
cool air. Put solar panels on top of the box, or somewhere that it takes lots of
sun through the day. The groups used were surplus amorphous form, I glued
them to a panel board fiber with caulk silicone rubber, and mounted the panel
on the top of the box oven.
A joint VW / Audi battery maintainer solar panel is also suitable for use in this
project. These panels are available on eBay for about $ 20, one or two of them
could work very well for this project. Wire the solar panels parallel to each
other, the fan and the capacitor. All positive results associated with all the
negative leads connected together. Attach the wire crosses of wire nuts.
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Alignment
The point of the oven with the South if you live in a climate of the North. If you
can, place the box in the corner to face directly toward the sun at midday
during the winter months. In some cases, the vertical mounting position is the
only option, useful heat will be generated as the box is in full sun.
In my installation, the package is mounted vertically and stressed that it is in
the South West. The furnace starts later in the day than if it had been south,
but will rise rapidly and provide more heat later in the day.
Use:
Just let it run, if the sun shines on the box, warm air generated by the top
conductor. I use the microwave to heat my garage through different seasons
cold, warms up nicely an otherwise cool the house. This position can pay for
itself over time by reducing your utility bills and increase comfort.
During the summer months, when extra heat is desired, the front glass of the
solar oven will be covered with a reflective surface such as a piece of plywood
or metal. The cover should be white to reflect the sun. The fan can be
disconnected to save his longevity.
Parts
2x 12V/150ma polysilicon or amorphous solar panels
1x 12VDC 4 "computer fan, about 200MA using the current
1x Finger Guard fan (optional, but recommended)
1x 1000uF 25V electrolytic capacitors
2x wire nuts
10 feet of # 20 stranded wire hookup
1x clear glass, 3 / 8 "tempered glass is recommended
2x6 lumber for the time frame
2x2 lumber for the internal spacer under
plywood or press board for the return
Corrugated steel roofing material
2 pieces of 1 / 8 "x 1 / 2" mild steel bars, spacers fence lines work well.
flat black paint for the team, collector metals, high temperature paint is best
deck water seal type pieces of wood
1 tube of silicone caulk
fiberglass or high temperature solid insulation
2x 8 "long 4" diameter metal pipe
Additional screws
Parts Sources
The mechanical parts can be purchased from a local hardware / building
supply store
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CirKits Links to Alternative Energy Web Sites
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Photovoltaics in our homes - 2 Output
Before you begin installation procedures solar house must be wondering why it
wants to install. If the answer is just a profit then it belongs to the long-term
investors. 25000 € investing today to get a total of 15-20 years back their
money plus 5-10000 € after depreciation. If the answer is the environment it is
romantic and rather wealthy and I propose that NATO ykolous more ways to
spend their money green. The correct answer (if any) is for both. Let us see
what to do someone who really cares.
1. Do not rush. Let's get the law, look at the application, let's look at the
incentives just calmly and see.
2. Good market research. Very good market research. Prices play very
carefully and wants to specifications, warranty, warranty conditions, the
uncontrolled costs and who put (inverter, insulation, wiring method, etc.).
Buying over the internet from abroad should not be ruled out if we have
someone to install. But again caution.
3. If you have a house (residence or holiday) congratulations if you have the
surface and the money. If you are building Forget it. Here they can not find the
owners of the gas will come for photovoltaics?
4. Do not think small decay times will promise you a number. We do not know
if and how much will increase the purchase price of the PPC.
5. If you combine investment with other forms of saving. But we must see what
the law include those ..
Photovoltaics in our homes
And suddenly we became Germany. Filled newspapers articles about the new
incentives will the government for the installation of small solar homes and
paperless resale of electricity in the first DEI.As see what the guy says and
then we'll suggest some practical steps in the opinion I akolouthisete.Apo the
Nation: "The new program is for power systems up to 10 KW and a
guaranteed sales price of generated power to the grid at 55 cents / kWh. H
average investment for installing a solar system 5 KW to 80 sq.m . a roof costs
around EUR 25000-27000.
The return on investment for the installation will be done in 7-8 years, but the
parties should, bearing in mind the extra work (eg insulation) and maintenance
costs, to calculate depreciation at 12 to 15 years, according to players market.
Besides, experience in solar buildings shows that periodically needed money
for repairs to roofs due to leakage and must not exclude the possibility serious
damage to the panel in one of the most frequent extreme weather events. You
should also take into account that in the next 25 years the "gap" of the selling
price at the PPC households will ever diminish in relation to the guaranteed
price.
In each case, however, hardly an investor may get lost by installing a small
solar system, however, provide significant gains in the long term. To connect
the PPC will be installed a new clock with a double gauge for measuring the
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output power and low energy absorbed by the inverter at night and any
accompanying equipment (eg cameras, alarms). H measurement of the
energy is at the same time it's consumed. H statement made by the PPC or
other licensed supplier, which for this purpose acting on behalf of electricity
consumption of the property on credit record.
4. Series gets the approval of small-scale work by the Town Planning. The
terms will be defined in a circular YPEXODE, but the issue of the approval
should be made in 5 days.
5. Then you need to ensure the financing of investment (through a bank loan).
7. Oloklironetai install equipment from the engineering company. The cost per
KW to reach 5,000 euros less.
8. Signing the contract of sale with the local office of PPC marketing within 15
days.
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A solar power 1 Kw has a maximum annual production of 1.300 kWh, but that
covers only 1/5- 1 / 3 of current needs in an average household of 4 people in
a house 100 square meters, and the average consumption is estimated at
5.000-7.000 kWh per year. This means that for the average household needs
to be installed plant at least 5 kW, which costs 25,000 euros (only the panel)
and occupies 80 square meters terrace. Theoretically the maximum of which
can yield a revenue of PV power 1 KW to sell at 55 minutes / KWh is 750
euros per year. But PPC will purchase and credit to the consumer-producer
excess electricity will be getting, the difference between output and power
consumption. The difference is credited to the beneficiary and will be paid
through bank accounts. "From the New"
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7 APARTMENT IN OLD WITHOUT REGULATION, HOW CAN be installed
photovoltaic?
Again practically unanimous decision of the General Assembly or by written
agreement of all co-owners of the building.
11 TAX MATTERS.
The low power photovoltaic ensure that the generated energy equivalent to
that required to meet the energy needs of the owner of the solar system.
Consequently, there are, for the main solar system, tax liabilities for the
disposal of such energy to the grid. The citizen-consumer producer will have
no tax or insurance requirement (open book, invoicing, insurance, etc.) or a
trader or not.
14 THE COST?
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All costs are included in the so-called cost per installed kW which is about
5,000 per kW (and with good market research can be reduced to 4.000 per
kW). The only costs not included in that amount is the likely cost to insure the
equipment against sabotage, etc. It should be noted that in most cases the
equipment is covered by a guarantee of more than 10 years.
Of the total investment proposals, the lion's share collected by the Crete, in
1300 Applications for investments of 80 kilowatts each. Then followed the
Rhodes with 230 projects for power 100 kW each and Lesvos with 225
investment of 70 kilowatts each. In Kos filed a total of 85 exemptions for power
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100 kW each and 74 also in Chios same power each. In Kalymnos submitted
27 projects in Leros and 12 for power 100 kW each.
For the circle has not yet advanced applications, while according to
information in photovoltaic development program in non-interconnected
islands are expected to open in the summer.
Since the degree of realization of these investments, but also expected in the
next phases of the development of photovoltaic, will determine the relationship
between the Greek islands with "green energy", since the development of wind
left behind.
Meanwhile, it remains open the installer of photovoltaic roofs, and the
expected legislation be postponed until after the elections. "
It would be nice to be stirring than those who get permits and investments that
ultimately implemented. And after how long after the final authorization ends
lining and falls paradaki for which all the farmers they became "investors".
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In countries like Greece, the debate is not about technology but about
how ladosoume countless departments to get permission in
advance. After that it will sell the license to someone so great
I think it's time to demand from the State prompt, clear
procedures in all our dealings. It is wrong and the incompetence
of some interest to delay and turned back across the country.
The Ai-Stratis will be "green" island
It was unofficially known for 2-3 weeks Ai-Stratis is the first
island to be made-pilot-green. If you hit the "Green Island"
project will follow the Nisyros and Tilos, site works on a
commercial scale, as announced by the Minister of Development
Mr. Hatzidakis.
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transport of electric bikes and cars. The study of the Santa army
will be completed in May while power generation from renewable
sources will be installed by year's end, even if needed, as Mr
Hatzidakis-regulation to accelerate the procedures. He noted that
since 2004 has tripled the installed capacity of RES plants in the
country, from 430 to 1350 megawatts. The project involves the
PPC, especially with its subsidiary PPC - Renewable Energy,
National Technical University, CRES and University of the
Aegean. Coordinator will be PPC - Renewable. The Ai-Stratis
chosen for pilot implementation of renewable sources for two
reasons: First is a small island with few residents (fewer than
250) and low consumption (the average daily consumption is
1,500 megawatt hours, while the peak is less than 280 kilowatts) .
Second was a place of exile and the government wants to convert
it into a symbol for the new season. So the summer will be the
notices for the next "green islands" on the basis and have
expressed interest by then local Arches.To project cost is
estimated at 10 million and will be covered by the General
Secretariat of Research - Technology.
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strong local government and the famous American economist
Jeremy Rifkin. In order to pull the world from the "era of twilight,
as he describes the years that use fossil fuels and nuclear
technology, the Cold War, Rifkin argues that the 5,000,000
inhabitants of Sicily can open a new path based on intense and
small-scale use of renewable energy. The basic idea is that every
consumer of electricity will be simultaneously output via the new
buildings that use renewable sources and is the least intensive.
The new energy plan presented in Sicily at Palermo at the
weekend by Jeremy Rifkin and Raphael Lombardo, powerful and
nationalist governor. The 64chronos Rifkin explained for one
hour at a drift of humanity to the environment if they are directly
katastrofiektos radical changes and adopt programs that use the
sun, wind, waves and biomass and hydrogen to store electricity.
"If you create a self-sufficient energy Sicily, perhaps we can
create a self-contained world," said Rifkin.
Why chosen Sicily? Console Angelo, director of the Foundation
on Economic Trends, which made the Rifkin and headquartered
in Brussels, told the newspaper «Financial Times," appears as
the main reason the sun - "all solar technology companies
consider Sicily as an untapped market that can invest quickly.
The energy plan foresees the investment of $ 5 billion over the
next 5 years, which will come mainly from the European Union.
But if you ask any Sicilian, I will answer: "I will never make them,
ever. It is just words. " And then you lift your shoulders and
added: "The Mafia". Indeed, in a bid to expand its range of
business activities of the Mafia is "green." The police recently
arrested 8 businessmen and local officials were preparing to
"launder" money by building a wind farm. The commander
Lombardo admits that a "green" Mafia is "a risk we face." Sicily,
he adds, "We need a cultural revolution."
"Obama has available, but not design • Europe has a plan, but no
money!"
"Sicily may be the flagship of a new industrial revolution," says
Jeremy Rifkin, American economist and adviser to the European
Commission on energy issues. With the agreement of several
leaders, including German Chancellor Angela Merkel. San
Antonio, Texas, and some cities in Europe say they are close to
adopt his vision, despite that some utilities, but supporters of
Obama's initiative for renewable sources believe that his ideas
have no basis.
Inside the financial crisis, Rifkin fears that governments will
spend a lot of money trying to save "old" industries such as
automakers that produce cars powered by oil and nuclear
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industry, leaving little investment in new technology. His own
vision of providing sufficient energy buildings, which will sell the
energy they generate back to the main system and contradicts
the idea of big central power plants that collect solar energy and
wind energy, which supports Obama. "Obama is available but
has no plan, while the EU have the plan but the missing money,
"observes.
Toyota has announced that the next generation Prius car will be optionally
installed on the roof solar panels to be used for the fan that cools the car when
it stopped. So stop the problem of hot entry in the car is parked in the sun.
This discovery is important because it shows us how far we are from the actual
use of solar cars. Even to put a big manufacturer of solar panels on the car will
not be able to raise only 10% of the distance can be traveled without
reloading. And it is doubtful whether consumers want to see the panels
installed.
10 MW PV plant in China
It is the largest unit but no mention about to have the necessary scale size in
mind when he speaks of photovoltaic modules and their cost.
On 20 March the Chinese government will announce which company wins the
tender for the construction of a 10 MW power generation using photovoltaics.
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The plant will be built in Dunhuang voriodytikis province of Gansu. There were
36 Chinese and German companies 1 1 from Denmark. The cost is estimated
at 500,000,000 Yuan (1 € = 8.85 Yuan) approximately 57.000.000 €. The area
will occupy the new facility is 1,000,000 square meters is 1000 acres and
construction will be completed in 18 months. The energy production is
estimated at 16.37 million kilowatts a year.
Papers on Chinese manufacturers of photovoltaic
According to the latest figures from the manufacturers of photovoltaic panels,
the global economic crisis has already hit the Chinese construction industry.
Of the 350 companies / manufacturers of about 250 (or 70%) have suspended
the construction of new panels. Of course this is not the major players in the
market but for smaller manufacturers based on their competitiveness in cheap
labor alone. Falling paragelion the last 2 months was long enough to cause
this crisis. Of course, serious manufacturers will benefit greatly increase the
market share katechoun.I average price of photovoltaic panels in Europe
during the month of January is 4.61 € / Watt panels for 125 Watt-peak. It is the
third month in a row that the average decline (from 4.72 € / Watt in October).
Power of Wind
So now I knew the battery chargers use a small photovoltaic solar energy. But
now that the wind was in fashion and began diaofores companies putting out
products that exploit the need to express the world ecologically. So the
American company K2 is a little time to take off the market a battery charger
and small device that works with solar but also wind. The product costs about
100 dollars.
This summer the islands, and very windy, it will be possible to charge the
gadjet it. Those who go on holiday will be placed under the air conditioner.
Retrieve at least one part of the energy we spend.
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What investments go in 2009
Energy investments despite the crisis found fertile ground because of the
failure or inability of PPC to launch new investment. Thus:
In thermal power going three major investments and is expected to start even
mias.rokeitai for units of the shape ELPE - Edison - ELLAKTOR the Endesa
Hellas and Terna Gdf Suez. These units are currently undergoing construction
and is expected to be completed either by the end of 2009 or the first half of
2010. While following the green light by the Central Archaeological Council,
due to start, and the fourth unit from Enelco.
2) Renewable Energy:
a) Wind Energy: Selected investments made or planned in the area of
renewable energy is the park ELLAKTOR Kefalonia power 27-28MW, the
expansion of the park's Edf also Kefalonia from 30 to 40MW, but expansion of
the park by the Panachaikon 35 to 50MW.
The owners go and cover the absence of the state. At what cost to the
Greeks?
Posted on Energy at 8:00 PM 0 comments
Tags wind farms, renewable energy, electric power, gas, solar
Happy New Year with good news for those in the solar
2009 will be a very good year for those who want to install photovoltaic
systems. The solar industry will become a victim of its success. Sales growth
has led to a plethora ASH & oversupply of photovoltaic production. While
demand will reach 2009, 4.2 GW (from 3.8 in 2008) production capacity will
reach 11.1 GW from 7.7 GW to 2008. To 2008 production has already
exceeded the demand, but in 2009 this oversupply is expected to drop prices
by 4.20 $ / MW is currently at around 2.50-2.75 $ / MW while the average price
this year will fall to 3.10 $ / MW. Prices will begin to return, the end of 2010.
Falling prices will push too many producers, while not impossible to stop the
production of some manufacturers primarily in China and Taiwan. On the other
hand is expected to increase significantly and the demand for new facilities.
Figures from the company iSupply.
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The largest photovoltaic thin film plant in USA
About First Solar completed installation of the largest solar module thin film
(Aniline Point) in America for the company Sempra Generation. The
installation of 10 MW size built in Nevada (Boulder City) next to a factory
producing electricity from natural gas from Sempra Generation. The latter
intends to grow the facility to 60 MW. The unit now starts the operation of
generating 23 GW-hours per year. The facility consists of 167,000 solar
modules.
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New permits for photovoltaic
According to the newspaper "Times", the Energy Regulatory
Authority (RAE) has issued permits authorized thus far electricity
production from photovoltaic stations, total capacity 400 MW in
total claims that exceed a force of 3.500 MW, adding that he
recently completed evaluation requests for the installation of
small photovoltaic Crete, less than 150 KW: H RAE 1300 granted
exemption permits to install solar panels on the island the total
power 105 MW. As we know, by 2020 20% of energy consumption
should come from renewable sources, according to the plan in
Brussels. Recently renewed this commitment diavevevaioseis of
the European Commission that will be affected by food crops to
produce energy crops and biofuel production should be done by
first lignocellulosic yles.Mechri now produce electricity from
renewable sources have been permits for facilities total power
7.465 MW. H overwhelming majority for wind farms have not been
implemented because currently in operation is about 1.000MW by
wind. Much of permits for projects that have implemented risk
revoked. The Regulatory Authority for Energy has withdrawn
production licenses currently in effect for 668 MW.
Solar project in Greece CPV technology
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The system SF-1100S-CPV
These days, Greece has shown in international media about the events and
losses and the negative impact of economic crisis. A news report released
yesterday makes us think a bit positive and hope for the future. The first solar
project in Greece using the technology of radiation concentrated photovoltaics
(CPV) cause the company SolFocus and Samara group, as indicated in a
statement the two groups. Because of this project, SolFocus will expand its
operations in Europe, which are based in Madrid, creating a subsidiary in
Greece. Creating multiple facilities, the overall systems development of
SolFocus will have a total capacity of 1.6 megawatts of power (MWp). The
system SF-1100S, which was implemented recently have frameworks with
unprecedented efficiency to 25%, which is the highest efficiency photovoltaic
systems in use today. During the first year of production, the entire plant has
the capacity to meet the energy demands of a small town about 2,500
residents, while avoiding the emission of 2800 tonnes of carbon dioxide (CO2).
The installation of the systems will begin in spring 2009 and the first power
generation until the summer of that year. The design of the SolFocus CPV
system uses a reflective surface to collect sunlight for 500 small but highly
efficient solar cells. The system SolFocus 1100S uses about one-thousandth
of the active, expensive solar cell material, compared to traditional photovoltaic
systems. Moreover, the cells used in the system (CPV) of SolFocus has twice
the performance compared to traditional silicon cells. On a sunny country like
Greece, this scale efficiency translates into very high energy, which will
accelerate the progress of solar energy equation with energy produced by
fossil fuels. The SolFocus completes the modules concentrated radiation
(CPV) with advanced tracking solar position, continuously aligns the provision
of frameworks to direct sunlight throughout the course of the day. The
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possibility of accurate solar tracking system SolFocus 1100S, leading to
energy production to meet the ideal peak demand periods such as summer
afternoon. The partnership follows the announcement of such cooperation with
SolFocus EMPE Solar, which provides for implementation of that technology
development and deployment of total power 10 MW in Spain and is expected
to be the largest installation of photovoltaic systems concentrated radiation
(CPV) in Europe. The parameters that determine the time interval is large
(amount of investment, location, technology, etc.). The data in Table
roerchontai study by Stanford professor, Mark Jacobsen.
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It should be noted that according to the study, these data apply to major
countries (U.S., Germany, Japan). In Greece, must add one plus years
and has to deal with incompetence, indifference and corruption of the
Greek government.
Market Share of Photovoltaic Companies
The diagram below fainetia market share of leading manufacturers of
photovoltaic cells in 2007. As can be seen from the market is not
monopolized by a manufacturer, but many smaller companies that
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occupy 40% of the market.
Photovoltaics worldwide
The diagram below shows the evolution of installed systems worldwide
sfotovoltaikon. How to develop the path of - is really expensive - solar
amid financial crisis is unknown.
Many talk about reducing the growth of systems especially if oil prices
fall further. My personal opinion is that decisions at the global level have
been taken long ago. The world wants to leave the oil and dirty energy
sources to check a few and gain even less. Whether it is the solar
solution and think especially if the price is not reduced or increased
performance. But this like many others was a way forward and should
not bedefomaste by economic crisis or the oil price fluctuations. To
recall only the very oldest statements of former oil minister of Saudi
Arabia: 'The Stone Age did not come to an end because we had a lack of
stones, and the oil age will not come to an end because we have a lack
of oil . ' (Ahmed Zaki Yamani) Despite the economic crisis but the U.S.
has new financial incentives and tax breaks for renewable energy. The
encouragement of their use should be systematic here.
European record for solar efficiency
The Fraunhofer Institute for Solar Energy Systems (ISE) in Freiburg,
Germany, has achieved a new European record efficiency solar cells,
39.7% (very close to world record 40.8% reached in August by the
National Renewable Energy Laboratory U.S. Department of Energy). The
previous European record was 37.6% of its own since July.
The photovoltaic material is, like the U.S., triple link (triple junction) and
the structure consists of more than 30 layers (including Ga0.35In0.65P,
Ga0.83In0.17As and Ge) deposited by metal-organic chemical vapor
deposition vapor (metal-organic chemical vapor deposition OCVD) on a
substrate Germaniou.Ta results obtained from the European Programme
Fullspectrum.Prepei be noted that these returns are measured in ideal
conditions but on the continuous record showing the progress on the
field.
Solar energy mobile phone batteries, mp3, ipod. Scenario 1: Imagine you
are lost in a wilderness, and urgently want to contact someone.
The phone does not have signal (I said, is desert). You walk for a
long time until you find one that would have a better signal. And
when you find, finds that mobile phone battery left!
Scenario 2: You're holidays (or work) and see a landscape that you
want to be photographed for long memory (or publication). You
take your digital camera, but disappointed after he discovers that
the battery is pesmeni.Tha could think of other scenarios too, but
there's the issue. Solar charger here present I made for fun and not
get lost in fear no gully and stay out of batteries (cell phone,
flashlight, camera, etc.) is just another great gadget to show my
friends. And who knows, may eventually need it in no blackout
PPC!
The construction of solar photovoltaic charger
It was very easy and does not need many words are clear and the
photos. I used a wallet and two by solar cells (or solar cells) of
amorphous silicon used in the manufacture Make yourself a solar
panel. (Eventually these photovoltaic cells are small miracles of
technology. Always take care to have enough in the cupboard,
because I always run out of ideas for ... gadgets solar energy - and
these cells are suitable for such experiments). Link them together
(positive power of one to the other positive and negative one with
the other negative). Each one gives approximately 4,5 volt and
100mA no load, so this way I have a combination that will finally
give some 3,7 volt and 180mA when connected to a load, eg a
mobile phone with empty battery. That should say to charge
batteries for a while to 3,6 volt (eg 3 AA batteries, AAA, C or D, a
mobile phone battery 3,6 volt, or other device compatible with
these features - radio, mp3 player, ipod-type electronic devices,
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etc.). I will not charge you, but we do need a load! Stuck on the
cardboard and those stuck on the inside of the wallet. I opened two
holes to discrete output cables so elegant. The cables can be
wrapped in the pouch wallet entering the money. They use all
kinds of plugs. For example, buy a cheap car charger, cut the plug
that goes to the cigarette lighter and connect the bare wires in two
more cables pulling out the charger.
Optional but helpful:
1. A short passage from electronics store, connected to the
positive cable to prevent discharging the battery when there is
sunshine.
2. Little rubber, leather or thick cloth around the solar cells to
come into contact and wear when you close the wallet.
Solar Power: Important notes
To charge a typical mobile phone battery (about 800mAI) just to
make 2-3 calls emergency, enough 15-20 minutes of sunshine.
1. This photovoltaic charger for emergencies and not to fully
charge the battery and every day.
2. Every mobile phone or other device has its own built-in charging
circuit that may not allow direct charging from the solar charger
(you will probably need to get out the battery from the device to
the charge that the solar charger).
Construction costs
1. The purses, 1 million.
2. Two amorphous silicon solar cells, 7 million.
Total 8 million.
Improvements
I could use multiple wallet (credit card) that opens on more levels
(or an oblong piece of leather or cloth) and use 4 or more solar
cells for more Volt or mA (recommended: 8 CIS for 7,4 V and
360mA ) for a complete battery charging mobile, mp3, etc. 2-3
hours. The thick cover of a book and put 4 solar cells on one side
and the same number to another (connected in series in each set
of four cells, while both 4ades between them) in order to build one
- impressive in form and function - Portable foldable solar panel
tabloid, who would be able to charge even 12 volt batteries with
180mA time! Fold panels sold such expensive on the market.
Check this once folded solar panel construction with the new
much stronger monocrystalline cells. Even with such a cell can
you make the above a small solar charger even 5 times stronger! I
recommend for those who are not electronic.
"Projects survival after natural disasters"
Recent years have dramatically increased the factors that can lead
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to a crisis that will affect a small or large extent how we live, or
even short term:
Environmental degradation, climate change, global warming,
energy crisis, oil prices, asymmetric threats, terrorism,
earthquakes, floods, fires, strikes or any major damage to the
power grid and electricity current it is some of the factors that may
affect the lifestyle to even the very survival of us if we find
unprepared. The recent fires and a few years ago a large
earthquake are two examples of the need to be prepared to face
the consequences following from such disasters. The upcoming
(or already started?) Financial crisis may affect oil, energy,
electricity and elsewhere. Usually, the problems we must face to
do with the stream, drinking water and cooking, lighting,
communications and transport. Under plans survive without power
after natural disasters will be continuously added new articles to
answer exactly these needs. More specifically, how can the solar
electricity from photovoltaics to help in this direction.
Solar electric bicycle!
Bike solar electricity! You may have seen and the presentation I made in TV
channels and newspapers. This article describes an easy and economic
transformation of an ordinary bicycle electric bicycle powered by solar energy,
with power from the electricity network, as well as a regular bike. Answers to
the problem of movement where there is no possibility of using other modes
(eg lack of fuel or inaccessible roads).
Here you see how easily converted an ordinary bicycle, as moving as a normal
bicycle, but with electricity as help!
My goal from the outset was not to remove features a bike:
The rider must pedal clicks, otherwise we go to buy a bike ... The solar cycle
will only have to assist the rider to be able to make longer journeys and not
afraid of climbs.
The second objective was to me the electric bike light and beautiful. I think I
got it! You will judge ...
The conversion to electric bike
The conversion to solar electric bike was very easy: buy abroad a ready
conversion kit that includes everything you need:
1. The front wheel in the center who has built a 250W motor that drives the
wheel of electricity (see photo).
2. The regulator controls the speed of the motor, the brake when he isolation,
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etc., I put a small bag under the saddle.
3. Handles the steering wheel that replaces the bike (the right function as the
"accelerator" to motorbikes to regulate the speed).
4. Brake handles that replaces the bike: When you brake, the motor and
isolate it stops moving the solar bicycle.
As shown in the photographs, the placement of this is easy for someone to
"catch his hands."
Otherwise it could help a cycling.
1. Unscrew the front wheel and said the position of the new wheel that has a
built-in motor.
2. Unscrew the brake handle and said the new ones.
3. Find a convenient spot to place the compact controller (eg a saddle bag or
grilled).
4. We connect all the cables (from the motor, brakes and "throttle ¨) to the
controller, depending on their color (the written instructions were clear and
easy).
Finally, we join the two wires, positive and negative (red and black,
respectively), the control over their respective poles of the batteries located in
a small box behind the grill. The batteries are 12V and three lead 13AI, closed
type, such as those who have bikes. They can be recharged with the charger
from a simple electrical socket PPC, but with solar photovoltaic panels.
Providing range of around 40 km at normal routes with a few climbs and helps
the rider to pedal a bit, especially at the start from zero (because there is
greater power consumption). I could use smaller and lighter batteries (eg
example, 7.5 AH) to half size and varos.I an array of 30 small rechargeable
battery nickel 8a The. As they say with cordless rechargeable vacuum cleaner
and tools (but it is better but quite expensive).
Walking by the solar bike
Anyone who makes a trip once with an electric bike, it never comes back again
in a simple bike ... The feeling is amazing! While you continue to do normal
cycling, not very tired, no sweat, you feel clean and refreshed many kilometers
you did. It is like a motorbike, bicycle remains. Just where did before 5 km 15
now do without thinking, so exercised and more. It's like you have with you a
professional racing cyclist invisible who stands with you pedal! Especially on
climbs is very important. Also, you feel more energetic security. It accelerates
much faster from zero, and develops and higher speeds on the road (up to 35
kilometers per hour straight at light pedal) to adjust to the traffic requirements.
And looking and all amazing! Finally, you have an instrument if necessary, to
move somewhere where there is no other way (for example, inaccessible
roads, fuel shortages, etc.).
The technical characteristics and cost of converting to electric bike
The motor is 36V - 250W and needs no maintenance (it is with permanent
magnets). The 250W is the average power that turns a professional cyclist
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during a race. The batteries are three 12voltes connected in series (plus to the
other alternately) to give the 36V wants the motor. The capacity should be at
least 7AI to have a range of around 15-20 km a day. I put 13AI, but have more
weight and volume. 7AI with the extra weight the bike is about 12 pounds, but
do not feel as you move. If it was the most expensive nickel, the weight would
be around just 5 pounds. In normal use would be permanently almost 3 years
before needing replacement. The final cost was when I made 377 euros for the
conversion kit (now are a little cheaper). The batteries cost about 15 euros (7.5
AH) and 30 Euros (13AI) each (need three).
Charging by solar energy (photovoltaic)
In my balcony I put 3 small PV of 20 Watt / p. I have taken some steps to wire
the ground and allow the electric bike to charge it after each use. The
photovoltaic panels are quite small so I can get them and me (fit in a large
briefcase). But it is better to get with me if I want security small charger,
despite a large portfolio ...
Can I remove the box with batteries and take it with me to recharge at home
and a wall (or the PV).
To fully charge the batteries enough 7AI 2.5 -3 hours in the charger or a power
breakfast (5-6 hours) the sun. Where it is completely empty. If the trip was our
example only 7-8 km, will take half the time to fully recharge it again. The
electric bicycle requested by the organizers of the exhibition EnergyRes as
one of the main exhibits and the reaction of visitors who tried it was
impressive! In the photo right next to the electric bike in the solar car ...
Solar oven
• The solar oven to cook anything!
• The solar oven: Or else the solar oven. This article describes the easy (and
very popular) build a small solar oven made from wood, which will be able to
cook any meal as a conventional oven, with the difference that it would have
no electricity, only a little sunshine (even in winter)! Moreover, it can convert to
drinking water, water that normally would not be appropriate (even seawater).
Here we see that built a solar oven, that is a very simple and inexpensive
structure which can cook any food or boiling water, only with solar energy and
without electricity. The solar oven is a commercial version and abroad, which
sold for around 200 Euros. Us would cost us less than 30 euros!
The oven can be set at a temperature of 200 degrees Celsius for cooking. But
the food could be cooked and with much lower temperature, just twice a year.
It has been shown that all foods are cooked at temperatures over 100
degrees. The solar oven temperatures from 110-140 degrees, depending on
the sunlight.
How to develop such temperatures, the solar oven?
By leaving the details to be seen, we can say that the solar oven is essentially
an insulated box with glass lid. The solar radiation penetrates the glass and
converted into heat which is trapped within the bulk of the inside of the box,
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constantly increasing temperature (global warming). In about 45 minutes has
reached 100 degrees, which is the boiling point of water. The solar oven does
not need continuous sunshine: Just the sun appears for 30 minutes every
hour, let there be sunny the rest of the time. Also, the solar oven does not
need high temperatures. You can cook even if the snow settles and the
temperature is 2 degrees. Long as there is sunshine. It is obviously reasonable
to expect that the months of November through February will be fewer suitable
days for the solar oven, than the rest of the year.
What made the solar oven
The construction is very easy, while the cost of materials does not exceed 30
euros. Even under conditions may also be less than 5 Euro!
1. First order from a carpenter finished two wooden boxes as in the photo on
the left. One box should be slightly smaller than the other so that the little box
to fit inside the large, leaving about 3 cm gap from the sides and bottom. This
gap will fill with crumpled pieces of newspaper for insulation.
2. From a glass crafts order a piece of glass thickness 5 mm, with dimensions
such as to cover the entire top of the large external box (like a cap).
3. Cover interior walls of the small box with foil to reflect the light does not
reach directly to the pot cooking on it by the reflection (photo on right). Keep
the glue we use is non-toxic at high temperatures. On the basis of internal
small box, place a piece of sheet metal or dark.
4. Place a tape of foam (like that used for insulation in windows) around the
upper part of the two boxes that touches the glass. Beware of the possible
leakage of air out of little box when mounted on the window.
5. Finally, we make (like a cap) and a reflector made of wood and tin foil,
which reflects more light in the solar oven for even greater efficiency.
A slight tilt toward the sun increases the efficiency. The container must have
lid and made of metal and dark, preferably black. Also, not very big (barely
able to contain the food). If you want an economical and handy solar cooker,
we can use cardboard boxes and instead cap glass, a transparent plastic
sheet oven (sold in supermarkets). The performance and durability of the oven
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but it will be much lower.
The test of the solar oven
The test was in April with an outside temperature about 23 degrees C and
sunny. The digital thermometer, as shown in the pictures below, shows the
inside of the oven 139 degrees C! The burger was baked well in about 90
minutes, and the sausages that followed! The next day I prepared a steak,
which, because it was quite thick, baked in about 3 hours. General chunks,
potatoes and beans need more time, while the thin pieces of meat, pasta (rice,
pasta in a little water) and vegetables like considerably less time.
Solar air heater - Heating without power!
Solar space heating application - Solar Heater
The construction will show you here, you can warm a room in winter (the days
can be cold but it is sunny, even in part). PV is not suitable for heating a
space, because the conversion of solar energy electricity and then again
convert electrical energy into heat means huge losses, making the solution of
photovoltaic inefficient. Here however, we will convert solar energy directly to
heat, warming the air.
The solar air heater (solar heater) is very easy to manufacture and very cheap!
To me it cost about 30 euros in materials and 2 hours of my time!
This will see here is very small and because of this small area is suitable for a
small space like a small store a small camper, etc. (If you put two such
panels).
Building but in the larger (and / or placing more) and can heat as larger
spaces.
For example, here is a collector is 50cm wide and 100cm in height, is an area
of 0.5 m
A room for example 10 m needs 1 / 5 of the surface collector, ie 2 m solar
collectors like this cooler.
So for an area 10 m will make a solar air heater (collector) with an area four
times greater than 0.5 m, ie a manifold with dimensions 2 m high, 1 meter in
width (2 m).
For a space of 20 sq.m. will make 2 panels 2 feet tall by 1 meter width each.
Construction
As shown in the picture above, we construct (or We order prepared by a
carpenter) a frame the size we want, depending on the square meters that we
want to heat (see above). In front of a glass place (in sticking around with clear
silicone).
The distance from the wood back to the front window should be about 7 cm
per 1 meter of the collector. There will be heated air from the sun. The ratio of
height to width of the collector should be about 2:1. On the back there should
be two openings, one downstairs and one upstairs. Underneath it gets cold
and the air will exit from the top opening heat (hot air is lighter than cold, so it
goes and finds out of the top opening). The next photo shows the exposures. I
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did at the beginning of the cycle experiment, but it is preferable to a
rectangular shape as in the following
:
The amount of slit inlet and outlet flow is approximately 6 cm on each measure
of the collector. If for example the height of the collector is 2 meters, then each
slot should have a height of about 12 cm and a width approximately the width
of the collector. As said, the hot air will go out with pressure alone, without
using fan from the upper outlet as shown in the representation of napkins I
made the following illustration. The collector is placed outside the wall of the
space we want to heat. Open a hole in the wall which communicates with the
lower opening of the collector and insulate the gaps that there are no leaks.
Or joined with a pipe, thus creating an air duct. From here it gets cold air
space. Do the same for the top opening of the collector and the wall of our
field. From there it will return the heated air is now back inside, warming the.
Designed to prevent the reverse at night and cools the space, hang a thin
plastic sheet on the top exit. Because it is light, the pressure of the hot air
outlet to push so we did not cut off the path of air. At night there is no air
movement, the plastic visor falls and closes the exit. I figured out (with several
complex calculations that are not present), that this structure we achieve
approximately 1.000 BTU per square meter collector. That is, with a collector
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area of 2 m win every day (from 10:00 to 16:00) over 10.000 BTU in free heat!
4 m win over 20.000 BTU. Not bad ...
And then the benefit is larger if we consider that when you get the sun and turn
on a radiator, stove or electric heater, they will just have to keep an already
warm cozy and not the heat from 13 degrees to 19 (this implies a significant
fuel economy or power).
The solar air heater can reach an area of 13-14 degrees Celsius temperature
of 19-20 degrees Celsius in two hours.
Oi first tests
The first trial began in January, on a sunny day, not exactly but with enough
sun. The outdoor temperature was just above 15 degrees Celsius (digital
thermometer behind the collector shows 18.4 because there the air
temperature is affected by the same collector).
I left the sink for 30 minutes in the sun. With a digital thermometer (and this
DIY) to measure the inlet temperature of cold air and it was 18.4.
Counted immediately after the outlet temperature of hot air was 50.4 degrees
Celsius!
The solar air heater raised the temperature of air in his entire 32 degrees in
seconds!
So even works very efficiently. His performance certainly went a bit after I
hung and stretched a black metal screen (like that put in windows for insects)
into the box and halfway from the back as tzami.Epeidi is black and metal,
heats up and quickly transmits its heat to air passing over and the next as he
goes up to find the exit onto the frame.
Applications
The applications are many: a small scale can heat a small space like a
caravan, a small workshop or garage k.lp.Se large scale, we can imagine the
entire south side of a house "dressed" with such collectors who will give
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100,000 BTU per day indoors, warming the day and saving fuel in the
afternoon (because when put into operation the heater, the space is already at
room temperature).
Because construction costs are low, the damping is too fast. In terms of
aesthetics, if done right job, the result is beautiful. What appears is a black
glass surface, where it would otherwise appear as the wall behind the glass
panels. There are ways of storing heat supplied by the solar collector. But add
in complexity and will not go into here. Indicative only: The warm air of the
cooler can be directed onto a large diameter column filled with water. The
water will warm up much, but it slowly releases the heat it until late in the
evening after sunset.
Solar garden lights (not only)
That illuminate normal, not like the others ...!
This month I wanted to make solar garden lights! Not like these solar lighting
trade are looking to see if it is lit ...! These trade using one or more led lights
but they are only suitable for decorative lighting, not functional.
The "lights" led have evolved over the years, so I looked for someone who is
strong and with the least possible power consumption.
I ended up in the press led luxeon 1W. One Watt may seem little but is not!
One luxeon led more than 10 times brighter than usual led.
Thus, the brightness of 8 lights will be similar like we had almost 100 of the
simple solar lights!
Such a super-led not just to replace the small led to a typical solar garden
light, why would not it supported the electronic circuit or the battery.
But better! Anyway I do not like the shape and quality of these cheap solar
lighting.
Here we will make a conversion kit that can be put into any luminaire as
normal outdoor lighting powered by the power of PPC.
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Only with this conversion kit will not need cables to the garden or watch the
installation of electricity, nor would we have monthly bills or will need 2,000
euros for the electrical and material!
It will be a conversion kit that could find application in other uses:
1. Lighting billboard advertising
2. Lights on the balcony
3. Indoor Lighting (warehouse, small room, Light Box, etc).
Construction
The only materials needed are:
1. The powerful luxeon led 1W
2. A three compartment three batteries with rechargeable batteries 2000-
3000mA
3. Two small photovoltaic panelakia almost 6V
4. A bracket of the photovoltaic (I used a wall bracket for a small speaker, but
would do and a simple wooden pasalaki or a small piece of sheet metal)
5. An electronic kyklomataki - night sensor 3,6 V
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As shown in the photo above, assembly is easy:
1. The two outer wires of the board go in positive and negative terminals of the
battery.
2. The two internal wires of the board go to their respective poles led.
3. The positive and negative power of the photovoltaic go to the respective
poles of the battery to charge it from the sun.
When I say battery, I mean a three compartment three batteries with
rechargeable AA batteries of 1,2 V (with a capacity of at least 2.000AI).
I put them all in a waterproof plastic electrical box, which had opened a small
hole for projecting the photoresists of the electronic circuit board (PCB) and
another one to come out the wires going to the lamp and led to PV.
The board - night sensor, the photoresists understands the darkness to
automatically turn on the lamp. Similarly understands and daylight to turn off
the light.
The sensor night was the hardest part, after the market offered only to 12V,
while the kit needs to 3,6 V. Okay, just looked and found how to convert a
kyklomataki 12V to 3,6 V (once I get some time to convert some friends and
not electronic) ...
The photograph shows the final installation. The box containing the light kit
fastened to the back of the photovoltaic element. The lamp led light coming
into the outer space from a hole that opened at the top, as shown in next photo
(the kit could be put in and the light for not shown). Insulation gaps with
silicone to protect from rain.
His performance is more than adequate, and illuminate for many hours at
night, those were the peak hours of sunshine a day and a bit more!
Performance of photovoltaic
Photovoltaic panels convert only a fraction of solar energy into electricity. How
big is this figure depends on the type of photovoltaic cells. The so-called single
crystal components have the greatest return (convert up to 17% of solar
energy into electricity). The polycrystalline data are slightly lower yield (13%
-15%), but cheaper than monocrystalline. There are so-called "amorphous"
consisting of a single area and not interconnected photovoltaic cells as above.
They have a lower yield (5% -10%) but are cheaper. Just need a larger
surface to give the same effect in monocrystalline or polycrystalline solar
panels.
Available solar energy photovoltaic
The sun provides over 1000 Watt per square meter. Thus, a photovoltaic
dimensions one meter width and height of one meter (ie one square meter) will
produce around 160 Watt hour consists of a monocrystalline solar cells, about
140 Watt per hour consists of a polycrystalline solar cells and about 80 Watt
per hour if, for example amorphous silicon.
A photovoltaic rated maximum power 100 Wp output turns around and 20 Volt
5 Ampere (20X5 = 100). We can connect what we photovoltaic panels in
series or parallel, to achieve the supply voltage (volt), amperage (ampere) and
of course the total power (watt) that we have in our system.
Example: connected solar
If we have 10 solar panels power 100Wp each, connected in series will have a
total voltage of about 200V 5A and intensity. Associate will also have overall
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trend of about 20V and intensity 50a. In both cases, the total capacity is 1.000
Watt / p. That is, 5 hours of intense sunshine a day, will pay 5.000 Watt / hours
per day, or else 5KWh.
Photovoltaic systems connected in series mean when we connect with each
other, connecting the positive power output of one panel to the negative of the
other, that alternatively the + to - etc.
Connected together is when we connect the positive cable to output a panel
with the following positive and negative output cable to the negative the next.
Series is summed only the voltage (the volt), while only the summed intensity
(the ampere).
The photovoltaic panels typically connect in series for higher voltage (volt)
when it comes to syndedethoun to the electricity network. Although intended
for autonomous system with accumulators (batteries), then the required
voltage is dependent on batteries. If the voltage of the batteries is 12V, then
connect the solar parallel (the voltage stays constant and multiply the
Ampere).
Sunlight in Greece
A PV system rated 1 KWp (for example, 10 solar panels 100Wp each) returns
to Greece from about 1.150 KWh (northern Greece) to 1.450 KWh (southern
Greece) year. In Attica, the Cyclades and the Dodecanese islands around the
1.300-1350 KWh. To find the average daily output of a solar panel, we tend to
multiply its rated power for 5.
Thus, a solar panel rated 100Wp, estimated daily take 500Wh (0,5 KWh) on
average. It is obvious that in the summer, the average yield will be higher than
the average production in winter (July or August is almost double than in
December or January)
Battery charge controllers
What is it and how the regulators battery charging
The charge is a simple electronic device to ensure proper charging of the
batteries (battery) of the photovoltaic system. Controls the charging process
and stops charging when it finds that the battery is fully charged. Otherwise
there would be a serious risk of damaging the battery. Since the batteries tend
to be discharged out even if no power to any device, charge controller shall
automatically resume the process of charging the battery if it finds that the
trend has fallen below the level of full load.
Many charge controllers have a slot on the connecting electrical devices that
we want to switch over to battery. So have the additional capability to interrupt
the operation of electrical appliances when they discover that the battery is
almost completely emptied, shielding her again in this way complete discharge
would lead to its destruction.
Select the correct charge regulator
The size of the charge controller depends on the size of PV will connect on it.
Must outweigh the total intensity in Ampere photovoltaics. If, for example,
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rated in Ampere of PV is 10A, you must choose a 12A charge regulator.
It should also be suitable for the voltage of the photovoltaic system. If the PV
earn a total voltage 12V, select control for photovoltaic 12V. If our solar earn
overall trend 24V, select control for photovoltaic 24V.
It is good to predict for the future. If we have to expand our solar system with
more solar panels in the future, then it is advisable to choose a larger charge
controller to cover future needs.
Voltage converter (inverter)
Converter voltage: 12V DC Convert (DC) to 220V alternating (AC) power
The inverter (can see them referred to as inverter or converter) is a device that
converts DC (DC) current of the PV system into alternating (AC) power 220V.
So can we supply the solar battery system, all household appliances require
220 Volt.
The inverter or converter 220V is a double wire (positive - negative) over the
poles of the battery. It usually has one or two sockets as sockets that have
walls of our house, on which we connect devices that require 220V, directly or
using πολύμπριζο or balanteza.Den matter how many devices will connect at
the same time, enough power for all devices operating at the same time not to
exceed the allowable power inverter - converter voltage. So if you have an
inverter 200W (200 Watt), can operate while a television 60W, a ventilator
40W, a 60W laptop and lamps economy 40W total power.
A good converter will shut down if you accidentally connect a device Watt
more than it can afford, thus protecting our appliances. The same would make
a good quality inverter if it finds that it is almost empty battery There inverter
from 50W to 10.000W. Usually we use inverter from 150W to 1.200W
depending of course on our needs. A small solar system back-up for power
failure may be served by an inverter 300W, but a large photovoltaic system
that covers all the daily needs for a whole house will want to inverter over
4.000W.
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Inverter with modified and inverter with pure sine
The inverter can be divided into modified sine inverter (modified
sine-wave) and pure sine inverter (pure / true sine-wave). A
converter with modified sine, is cheaper than one with pure sine
and is suitable for most devices. But consumes up to 20% more
battery power than a pure sine inverter. Moreover, in TVs and
sound systems of poor quality will hear a slight hum. On the other
hand, the only downside with the pure sine inverter is their price,
after three to four times more expensive than a counterpart with
modified sine. If you have sensitive electronic devices, it is good to
use for those with pure sine inverter.
The devices operate with motors (eg refrigerator) to require a
moment (when you start the motor) multiple Watt (eg five times or
more) than their normal function. This is something we need to
know when choosing the converter to select a greater effect on the
overall (nominal) Watt of devices that operate simultaneously.
Cost - Prices inverter
A modified sine inverter 300W will cost around 50 euros, and a
300W inverter with pure sine has cost around 200 euros.
The price of a modified sine inverter 1200W is approximately 200
euros, while the price of an inverter 1200W with pure sine is
approximately 800. The prices certainly are indicative because they
depend on the quality of construction, origin, brand converter, etc.
Photovoltaics: prices for all equipment
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Also, practical method of calculating consumption and small size
PV system for Spring, Summer and Autumn.
Note: The prices for photovoltaic and other equipment at the end
of this article.
First you must calculate the consumption of each appliance.
Suppose then that we have 3 lamps economy 15W (a 15W energy
saving bulb is equivalent to an incandescent lamp of 60W) and a
TV 14 ".
A 15 watt bulb economy consumes 15 watts per hour. In 4 hours 60
watt / hours (4 hours X 15 watts). Three such lamps 4 hours each
one, using a total of 180 watt / hours (3 lamps x 4 hours x 15
watts). A 14-inch TV consumes about 40 watts an hour, consume
in 5 hours, 200 Watt / hours (5 hours x 40 watts). Similarly we can
calculate the consumption of other devices and finally aggregate
the consumption to find the total consumption of the system
(consumption of each device is usually printed on some of the
device or on the feeder / transformer).
So the bulbs and TV will consume a total of 380 watts / hours each
day.
Calculating sized photovoltaic panels
To find the correct size of the required initial solar divide this
number by 5, those conventional and, on average, so the useful
hours of sunshine. So we have about 380 / 5 = 75Wp power
requirement of the photovoltaic (if you want to calculate and
November to February would be dividing by 3).
Calculation size battery (accumulator 12V)
Similarly, to find the right size battery (accumulator 12V), multiply
by 2 the least (to not empty completely each day and reduce the
battery life). So 380CH2 = 800 watt / hours the required capacity of
the battery. Since the battery capacity indicated in Ah (ampere
hours), divide the battery voltage (12 volts): 800/12 = about 65Ah.
The larger this size, the better. We do not use a car battery, but
battery (battery) closed, deep discharge.
Finally, increasing the size of the PV and battery by 25% to predict
and losses will inevitably have the system. This results in PV
around 90Wp and battery over 80Ah. All this for a photovoltaic
system for a day. If we can predict about 2 days of complete cloud
almost doubles the size of the PV and battery reached above.
The inverter (inverter) 220V
If the equipment is our 12 volt to connect on the battery (or
rymthisti charge, if such a possibility). If you want some devices
use 220-volt inverter (inverter) 220V. Its size depends on the total
watts for appliances that operate simultaneously (in mind that
153
appliances with motors, such as in refrigerators can pull instantly
when booting up to 10 times more watts than the names of so
choose correspondingly large inverter). Inverter are so-called
modified sine and pure sine relatively expensive as PPC (or
higher).
This is a practical method for calculating both small photovoltaic
systems that can make everyone. In older systems, what we have a
professional approach to analytical study.
Photovoltaic systems, photovoltaic systems Prices
Prices for PV systems vary depending on the price list for each
company. In general, however, prices for photovoltaic panels is
one of about 4.5 up to 5.0 per Wp power (eg panel 50Wp 250
million). The acquisition of several panels, and the price falls
below the 4.0 per Wp.
The price of a battery deep discharge is slightly lower than 2.0 per
Ah capacity. So a deep discharge battery (Deep Cycle) 100A
capacity costs around 180 euros. The values of an inverter and a
charge controller is considerably lower than those of solar and
battery (battery).
Prices regulators begin charging 25 euros for small panels and can
be overcome and EUR 100 if they are to support more panels.
There are charge controllers with advanced features that costs a
lot more. The price of an inverter 300 Watt modified sine is about
50 euros and a 1.500 Watt about 150 euros (the pure sine inverter
cost 3 to 4 times more).
How do I calculate the demand for electricity?
A simple way of calculating the power consumption and size of a
photovoltaic system.
Each device has more of a small tag that lists the power
consumption of the device. For example, a 21-inch TV can write
220 volt and 0.5 Amps (A). This means you can consume 220 x 0,5
= 110 Watt. Some devices may display only and not 220 volt amps.
In this case, it will report directly watt. In the previous example will
create 220 volt and 110 watt.
This means that more electrical appliance will consume in a fully
operational 110 watt per hour to operate. In practice it may
consume less, if, for example, works with low brightness and low
volume.
Step 1: Saving Energy
An Example of are light bulbs. A light bulbs of 60 watt, such as
those that most use for lighting the premises, consumes 60 watt
hours for each operation. This means that if we have 5 such lamps
operate on average 6 hours 24 hours each one, then the
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consumption will be 5 X 6 X 60 = 1.800 Wh 24 hours.
Compared to incandescent economy of 15 watt (which is
"attached" as the common incandescent bulbs of 60 watt) have 5 X
6 X 15 = 450 Wh, ie an economy 1.350 watt per 24 hours. When
designing a photovoltaic system, the main and first thing which
needs to start is to examine the potential for energy savings.
Step 2: Calculation of consumption
1. Multiply the Watt each device by the number of hours they will
work.
2. The sum of all those of the products will be our total daily
consumption in Wh.
3. Because there are no leaks in our system and hidden
consumption of appliances that are not calculated (eg devices that
consume electricity even closed or on hold), multiply the previous
total by 1.5.
So, if after these 3 steps we conclude that we need a total for all of
our components 600 Wh per 24 hours, you must install a
photovoltaic system (panels - panels - solar power) and battery
(batteries) that can provide us at least 600 Wh per day.
155
our needs. The bigger the better for battery life.
So if we calculate that we need 600 Wh 24 hours, we choose
syssoretes with double capacity (1.200 Wh), ie at least 12 volt
100Ah to have an independence day.
Usually but provides for 5 days with no sunshine, so multiply the
previous value at 5: 100Ah X 5 = 500Ah at 12 volt (or 24 volt and
250Ah).
Note:
When a device requires a 220 volt - 1 A and use a 12 volt inverter
220 volt (inverter) to operate from the battery, then pull 18.33 D
battery, not 1A, as the 220 watt in operation alternating current
(220v X 1A = 220 watt) translated into 12 volt X 18,33 A (= 220 watt)
when operating with inverter (inverter) and power from battery 12
volt. Where applicable and when used battery 24 volt, which will
"grab" A 9.16 (24v X 9,16 = 220 watt).
As the use of inverter (inverter) involve the loss of 10% to 20% of
final consumption will be higher than indicated in full operation.
Step 4: Calculate the size of solar panels.
So if we reach the size of batteries (battery), then there only
remains to calculate the size of solar panels that will be able to
charge batteries. A solar panel 50 watt / p nominal (per hour
sunshine) will give a day with 5 hours of sunshine (eg April) 250
watt / h in theory (because losses will be 10% to 20% less) and in
days with 7 hours of sunlight (eg July) 350 watt / h.
To charge completely empty battery (theoretically, because we will
never be completely empty as we said above) and the 12 volt 100
Ah (1.200 watt / h) will have 4 days in April and 3 days in July. If
you install such solar panels, three of 50 watt / p each one (or one
of 150 watt / p), then you need a day in July and nearly two days in
April.
When designing a large photovoltaic system for your home, it is
our basis for the worst scenario is the winter sunshine hours
(average), which for Greece is the 3 hours a day (in December). If
you are planning a holiday to visit only in summer (May to
September), hours of sunshine that count is 6 (M). Thus, the
previous example we calculated that we consume 600Wh 24 hours,
we need solar power panels 600 / 3 = 200Wp to our cover winter
and summer. If we want to cover only the summer, we would need
solar panels total power 600 / 6 = 100Wp. In this case we would
need even smaller batteries, since summer is not necessary
autonomy for 5 days without sunshine calculated in step 3
EXAMPLE
PV Practice
156
Holiday home, caravan, mobile homes, cottage, warehouse, boat
So we have one site (eg cottage, caravan, mobile homes, cottage,
warehouse, boat etc.) that you visit every weekend and want to
have light bulbs with 3 to 5 hours daily, a TV for 4 hours a day and
a small refrigerator to keep cold water, soft drinks, food, etc.
The lights and television on solar power
In solar energy applications try to use economy of lamps 12 volt,
not 220. Fed directly from the batteries so we have minimal losses.
If you use lamps with 220V inverter will have lost up to 20%.
To illuminate for 5 hours with 3 12V-15W fluorescent work
simultaneously (15 Watt lamps for 3 to 5 hours) we 225Wh.
The TV is having 220 volt, will be powered by inverter 220V. A 21-
inch TV with small claims. 60W for 4 hours is 240Wh day. Total 465
Wh.
Inverter is a device that converts direct current from batteries
(rechargeable batteries) to alternating current of 220 volt, so we
can link up and we supply electrical appliances using alternating
current 220 volt - like that of PPC.
The refrigerator
The refrigerator is the energy-hungry appliances, after the cooker,
electric water heater and air conditioner. So we use gas stove,
solar heater and fan, respectively. He has great power
consumption as the motor operates in several hours a day, trying
to maintain a low temperature inside.
It should not be open often and for too long the refrigerator door.
They should also check that seal well and have worn out plastic
door. Finally, it is important to be in a place not facing the sun and
away from sources of heat. Of course it should be and the energy
class "A" for lower power consumption.
In this instance, our requirements in relation to the fridge is small,
so use a small refrigerator, for example 60W. If the motor to work
10 hours a day, will consume 10 hours at 60W, is set 600Wh (600
Watt x Hours).
Whenever you start the motor, some would require multiple instant
Watt by name. So for a refrigerator of 60W, we are well ahead
inverter 60 watt, which raises starting and running motors.
It is advisable to opt for a separate, independent solar power
system for the refrigerator and another inverter, solar battery and
other devices.
Accumulators (batteries)
For 24 hours autonomy, we need accumulators (batteries) to
provide about 1000 Wh (eg 12v and 80Ah) for lighting and TV
(465Wh for 2 to avoid completely discharged batteries to withstand
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several years) and inverter 150W.
Depending on the refrigerator 60W batteries need to supply
(consumption and cooler 600Wh there for 2) 1200Wh (eg 12v and
100Ah) and good quality inverter, 300 watt continuous operation
with 600 watt option for small spaces.
In this way, enough energy to power with electricity and other
widgets (such as radios, mobile phones etc).
The photovoltaic panels
The size of PV depends on how often and for how many days will
run this.
In this example, we visit the site once a week for 24 hours, so even
a small solar panel enough time to recharge their batteries during
the period of absence of 6 days. Otherwise, we should at least
replenish the consumption of each day:
By M.O. 5 hours of intense sunshine of the day (eg April), we
would need solar power overall 2000 / 5 = 400Wp. to replenish the
consumption of cargo every day.
But because we are not there every day, we will collect solar that is
required for a 24-hour electricity, during the 6 days of our absence.
So we divide by 6 and we need a total capacity of photovoltaic
panels around 70Wp. Thus, we get a solar panel 40 Wp for the
refrigerator and another one the same for other devices.
If you visit the above site in summer, then our reach and an even
smaller photovoltaic (eg 30Wp) because in the summer sunshine is
more than 5 hours. If you visit the above site and winter, then we
need more solar (eg 70Wp) because the winter there is sunshine
for 3 hours a day (avg).
Prices (cost) PV system
The above solar system, with charge controllers, cables, etc. cost
less than € 1,000 without installation. Details:
• Two photovoltaic panels 35-40 Wp, price 450-550 euros.
• Two charge controllers, 12 volt - 5 A, costs about 50 euros.
• Two batteries (battery) 12V - 100 Ah, suitable for solar energy
applications (deep discharge) price of around 350-400 euros.
• Two inverter 220V, 150-300 W cost around 100-150 euros.
Make a good market research and price comparison of
photovoltaic and batteries (batteries), because the prices of PV in
Greece "play" a lot of online store to online store and Greek solar
company to another European company fotovoltaikon.Gia to have
autonomy 2-3 days without sunshine, it doubles the size of these
batteries and solar and / or add a small generator fuel (for greater
certainty in the winter or fail in any part of the solar system).
Backup solar system
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Stored solar energy for hard times!
We have all experienced: Sudden blackout! And then we see that there are
candles in the house. And if you are not able to find matches or lighters in the
dark. But where is the lens! It has batteries?
In the next blackout we are prepared. The best way is to have a hierarchy of
our needs before the power failure.
• What equipment will need to work (lights, computers, television, radio, etc.)?
• In what areas (kitchen, living room, storage, etc.)?
• For how many hours or days?
So we will be able to configure the size of the photovoltaic system and
batteries that will be needed. The next step is to calculate the consumption of
these loads.
A backup system of photovoltaic panels can be very economical if you stick to
basic needs such as lighting 2-3 rooms, a small television, a radio and a fan.
A backup system of photovoltaic panels composed of
• the solar collector or solar panels
• the regulator load accumulator (battery)
• The accumulator (battery)
• optional inverter (inverter) 12, 24 or 48 volt to 220 volt.
The facility safely done by an electrician although it will not pose any problem
for someone with rudimentary knowledge of electrical engineering.
Such a solar backup system could also be portable for use in car, boat,
camping or allou.Ftiax it yourself: Portable power generator low-cost solar
panels!
Calculating your needs correctly, the next blackout could own your house has
light, cordless telephone, television, microwave and toaster with neighbors to
wonder as we stumble ... looking for batteries for the camera! Where
applicable to the case of a generalized black out that can hold many hours or
days!
Table ROI PV
Gross investment income per year before tax
Prices for this guide investment in photovoltaic solar energy was calculated
assuming that the value of the MWh shall be adjusted by 2.4% per annum for
a plant which gives 160 MWh per year.
The total cost of such a facility is approximately 850,000 euros (2007 prices)
has been calculated without any subsidy would reduce the price by about half.
It includes operating and related costs, reducing the efficiency of photovoltaic
cells and taxes.
Thus, the 1st year revenue will be approximately 72,000 Euros, the 2nd year
approximately 73,728 Euros, etc. The 25th year will give (with the above
simplifications) and a total of 127,212.99 euros in 25 years would have
accumulated (without reinvestment), almost 2.5 million.
159
Because you are operating expenses and taxes, net earnings would be
roughly say about half of the above. So we see that (with the current price of
photovoltaic and present performance) without subsidy investment would
perform poorly. With a lower purchase price even kWh would be completely
asymfori.Syntoma but we will see solar cells with greater efficiency and lower
costs. And the cost of generating energy through conventional means rising
constantly for a bright future for fotovoltaika.Den is no coincidence that the
major oil companies (BP, Shell, etc.) are the current leaders in research,
production and promotion of photovoltaics.
Investing PV
Instructions for the investment program in solar energy
1. We pay the price of megawatt hours (ie 450 euros).
2. The performance of each resident in KWp KWh per year (in Greece 1150-
1450 KWh per year).
3. The ratio of operating costs per month, total revenue per month. Do not
forget to add our business and to pay operating. If for example the cost is
40,000 and income 100,000 then the rate is 40%, so we introduce the number
40 in their field.
4. We give the rate of annual yield reductions of PV, eg 1% for 1 year.
5. We give the average interest rate which will be remunerated at the net
annual profits will be reinvested and / or file all year. Eg 4 4%.
6. We give the subsidy from the investment law, eg the number 50 to 50%.
7. Also, we installed KWp the total final cost of initial installation per Watt. It is
estimated that about 6.00 per Watt. It is a little higher for smaller plants.
Expected to decline in coming years.
8. Finally, we give an estimate (eg the value of 3 for 3%) for average annual
inflation during the investment (hard for so long, but that price and to give, is
deflated and the amount in the present value , when talking about the current
amounts). The adjustment in the price of KWh of Electricity adjusted annually
to 80% inflation and we will NOT include possible increases in the PPC that is
above inflation.
The last two columns give us: The penultimate column of the flow of net profits
(aggregate function) of investment over the years. The last column of the
current (deflated) value of these poson.Mporeite a free download to your
computer and to calculate different scenarios of investment in solar energy.
You can certainly build a eco home that will lower heating and cooling needs.
Construction costs for a green home will be considerably higher, but will be
160
depreciated from the low cost management in depth 20 years.
What can we do? First started with energy saving lamps in the economy,
insulation, etc:
1. Perfect cover insulated walls and windows (eg double glazing). Tents,
awnings, etc.
2. Bulbs economy economy in lamps for lighting.
3. Appliances (refrigerators, washing machines etc.) A type of energy, the
lowest possible consumption.
4. Solar hot water heater, kitchen with gas.
5. Rational use of appliances, avoiding wastage.
Only the above will guarantee that your home energy savings over 50%!
Then, calculate your needs in electricity (how many kilowatt hours per month
will eat) and decided what you want to rate ranging from photovoltaics.
An average Greek house with solar water heaters and lamps economy and
with air condition, oil burners and electric cooker, using about 350-450 KWh
per month (cost around 40 euros). Without electric stove and air condition
consumes about 250-300 KWh.
To produce 250 KWh per month required by photovoltaic solar panels about
12 of 180 watt each, plus batteries and accessories. Along with the installation,
the cost reaches approximately 17,000 to 22,000 euros, depending on the
batteries to be used.
If the house has no connection to electricity, we must invest in a larger system
or a mixed system with wind turbine to have a few days of autonomy in case of
heavy and continuous cloud for days. It is useful in these cases and generator
fuel for extreme cases.
If you have connections with PPC then these cases are migrated to the
network stream from the PPC. Moreover, we do not need batteries so the cost
of these household photovoltaic system is reduced to 30%.
The final solution is proposed for a main house with all modern amenities. In a
cottage, we could compromise with a few simple and fairly cheaply, to avoid
completely, PPC with all fixed charges and to others it means ...
PV Practice
Holiday home, caravan, mobile homes, cottage, warehouse, boat
So we have one site (eg cottage, caravan, mobile homes, cottage, warehouse,
boat etc.) that you visit every weekend and want to have light bulbs with 3 to 5
hours daily, a TV for 4 hours a day and a small refrigerator to keep cold water,
soft drinks, food, etc.
The lights and television on solar power
In solar energy applications try to use economy of lamps 12 volt, not 220. Fed
directly from the batteries so we have minimal losses. If you use lamps with
220V inverter will have lost up to 20%.
To illuminate for 5 hours with 3 12V-15W fluorescent work simultaneously (15
Watt lamps for 3 to 5 hours) we 225Wh.
The TV is having 220 volt, will be powered by inverter 220V. A 21-inch TV with
161
small claims. 60W for 4 hours is 240Wh day. Total 465 Wh.
Inverter is a device that converts direct current from batteries (rechargeable
batteries) to alternating current of 220 volt, so we can link up and we supply
electrical appliances using alternating current 220 volt - like that of PPC.
The refrigerator
The refrigerator is the energy-hungry appliances, after the cooker, electric
water heater and air conditioner. So we use gas stove, solar heater and fan,
respectively. He has great power consumption as the motor operates in
several hours a day, trying to maintain a low temperature inside.
It should not be open often and for too long the refrigerator door. They should
also check that seal well and have worn out plastic door. Finally, it is important
to be in a place not facing the sun and away from sources of heat. Of course it
should be and the energy class "A" for lower power consumption.
In this instance, our requirements in relation to the fridge is small, so use a
small refrigerator, for example 60W. If the motor to work 10 hours a day, will
consume 10 hours at 60W, is set 600Wh (600 Watt x Hours).
Whenever you start the motor, some would require multiple instant Watt by
name. So for a refrigerator of 60W, we are well ahead inverter 60 watt, which
raises starting and running motors.
It is advisable to opt for a separate, independent solar power system for the
refrigerator and another inverter, solar battery and other devices.
Accumulators (batteries)
For 24 hours autonomy, we need accumulators (batteries) to provide about
1000 Wh (eg 12v and 80Ah) for lighting and TV (465Wh for 2 to avoid
completely discharged batteries to withstand several years) and inverter
150W.
Depending on the refrigerator 60W batteries need to supply (consumption and
cooler 600Wh there for 2) 1200Wh (eg 12v and 100Ah) and good quality
inverter, 300 watt continuous operation with 600 watt option for small
diastimata.Me above, enough energy to power with electricity and other
widgets (such as radios, mobile phones etc).
The photovoltaic panels
The size of PV depends on how often and for how many days will run this. In
this example, we visit the site once a week for 24 hours, so even a small solar
panel enough time to recharge their batteries during the period of absence of 6
days. Otherwise, we should at least replenish the consumption of each day:
By M.O. 5 hours of intense sunshine of the day (eg April), we would need solar
power overall 2000 / 5 = 400Wp. to replenish the consumption of cargo every
day.
But because we are not there every day, we will collect solar that is required
for a 24-hour electricity, during the 6 days of our absence. So we divide by 6
and we need a total capacity of photovoltaic panels around 70Wp. Thus, we
get a solar panel 40 Wp for the refrigerator and another one the same for other
devices.
162
If you visit the above site in summer, then our reach and an even smaller
photovoltaic (eg 30Wp) because in the summer sunshine is more than 5
hours. If you visit the above site and winter, then we need more solar (eg
70Wp) because the winter there is sunshine for 3 hours a day (avg).
Prices (cost) PV system
The above solar system, with charge controllers, cables, etc. cost less than €
1,000 without installation. Details:
• Two photovoltaic panels 35-40 Wp, price 450-550 euros.
• Two charge controllers, 12 volt - 5 A, costs about 50 euros.
• Two batteries (battery) 12V - 100 Ah, suitable for solar energy applications
(deep discharge) price of around 350-400 euros.
• Two inverter 220V, 150-300 W cost around 100-150 euros.
Make a good market research and price comparison of photovoltaic and
batteries (batteries), because the prices of PV in Greece "play" a lot of online
store to online store and Greek solar company to another European company
after.
To have autonomy for 2-3 days without sunshine, it doubles the size of these
batteries and solar and / or add a small generator fuel (for greater certainty in
the winter or fail in any part of the solar system).
Useful articles and links for photovoltaics, solar and wind energy. articles and
examples of practical application for solar energy, photovoltaics and
renewable energy sources (RES)! About me ...
When I began this effort a few years ago, the site that was the first and only in
Greece category of applied use of Renewable Energy Sources (RES).
Then I could not imagine the interest and the impact it would have such an
issue, not only in Greece and abroad ... Currently receiving e-mail from
friends, even from countries like the U.S. and Germany, who want to translate
pages into English. This is because while there are some similar websites in
English, but dealing piecemeal rather sfairka or in depth with the issue ... The
promise to give is that I will continue in the same way to support with passion,
what I do. Below construction "fix it yourself" as photovoltaic panels, solar
cycle, solar air heater, solar furnace, solar water heating, geothermal, wind
energy / wind turbines and more! To be the world's largest site in this category,
Greek!
Four lamps economy 12voltoi of 15W each for 2 hours each day using a total
of 120 Watt / h (Watt hours) every 24 hours. A TV around 21 "for 3 hours
consumes other 180 Watt / h. So it takes about 300 Watt / h daily.
A solar panel 80Wp would give the battery is the amount of energy when it is
sunny in the morning until noon. Enough to see to the south, without impeding,
(shadow).
163
The correct battery was a battery 12volti lead to deep discharge capacity of at
least 50AI (12V X 50AI = 600Wh, for discharged battery at 50% only to non-
damaged soon).
But as there is sunshine every day and some days we want autonomy from
the battery, so 150AI for 3 days autonomy. It would take course 3 panels
instead of one, so when you come back the sun after 3 days be enough time
to give back to the battery power for 3 days and not only for current, so that
there is still enough energy stored for 3 days autonomy. We can make our
system of autonomy for those days we simply increase the cost.
Sometimes, however, the lack of sunshine continues beyond the third day. In
order not to remain in the dark ..., in these cases we use petrol or diesel
generator combined with a quick charger for the battery, that through the
charger and the generator to charge the battery every morning with a few
hours of the generator.
There is no need in those few hours to charge the battery 100%, but the more
the better for the longevity of the battery. In this example we need 300 Watt / h
every 24 hours (ie 25 AH, after 25AI x 12V = 300 Watt / h), a 10A charger will
give us in about 3 hours from the generator. The charger should not be larger
than 1 / 10 of battery capacity. For example, if the battery is 150AI, the charger
should not be over 15A.
So we will have enough energy to the battery to the needs of the rest of the
day. This continues until there is sunshine in the battery to restore the
autonomy of the three (or more days depending on our system).
The cost of such a photovoltaic system is approximately 500 euros for a day of
independence and close to 1,500 euros for three days of autonomy. The cost
of the photovoltaic system is added to the cost of a small petrol or diesel
generator and a charger as possible, reaching a total of 500 euros.
The stadium was built in Taiwan for the World Games 2009. In 8844 the roof
installed photovoltaic panels capable of producing just over 1 Gigawatt / h per
year!
Besides its own needs, cover the needs for electricity of 80% of buildings in
the area! Very nice design and perfect example (aesthetically) correct
application of photovoltaics in building
167
For example:
6 hours for 2 bulbs of living, a total of 12 hours in the living room.
3 hours for 2 bulbs bath, a total of 6 hours for loutro.k.o.k.I
consumption will be 40 hours on 60W, a total of 2.400 Wh, or
otherwise 2,4 KWh every 24 hours. 4 months in power bills PPC we
consume 288 KWh for lighting.
At an average cost of 12 minutes per KWh (depending on the scale
of costs), the lighting cost us 34.50 euros 4 months in each
account. If you replace these bulbs with energy saving bulbs of
18W (with corresponding performance lighting 80W ordinary
incandescent light bulbs), consumption would be 40 hours on
18W, a total of only 720 Wh or otherwise 0,72 KWh per 24 hours or
86 , 4 KWh a 4 month period. At an average cost of 12 minutes per
KWh (depending on the scale of charges), the light will now cost
us 10.37 euros 4 months in each account.
Saved is 24.13 euros each electricity bill!
2nd movement: Heat water when we need it!
It is good to have a solar water heater. Whatever the case,
however, a bad habit that many have is to turn on the heater and to
forget for a long time ...
Depending on the heater (and the thermostat), an electric water
heater will have a specific time to heat the water temperature we
want. It is the one in which the orange LED goes out! If you leave it
open more hours, you only made is as follows: The water starts to
cool down a bit again until it falls below the temperature of the
thermostat to turn back the orange LED and to resume the
resistance to pull current to reheat the water temperature, which
anyway was at before! More power consumption is the same
168
result! No water will be warmer or more liters will warm as the
capacity in liters of each heater is given. And do not forget that the
electric water heater has the highest consumption in Watt from all
devices on a home: Typically 4.000 Watt! So turn on the heater just
before the hot water need. We go to the bathroom until the LED
goes out, or shortly thereafter. For washing dishes, etc. use
special small water heaters: No need to heat 200 liters, while we
only need 10!
And of course if we can install solar water heater.
If you leave the orange lamp to light again, sometimes for 10
minutes every time we eat, for no reason, until 2KWh every day
that 240KWh each electricity bill, or 28.80 Euros!
If we do everyday with the previous, will save approximately 28.80
Euro per account.
So watch the baking process the glass door and did not blink
constantly to watch better ... project.
Every time you open the oven door lost almost 1 / 3 of the heat. It
will then consume more electricity to xanafthasei temperature it
had before opening the door for a while (saving up 200Wh by
baking)!
When you realize that food is almost ready, turn off the switch
temperature a few minutes earlier. The temperature has been
developed, still cooks food for another 10-15 minutes (to save
300Wh by roasting).
The oven consumes about 2.500W per hour, while the microwave
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800W. So not heated ready meals in the oven, but in the
microwave. 15 minutes in the microwave equivalent consumption
of about 500Wh, while the same result as the microwave would be
provided with 5 minutes or 60Wh (save about 450Wh by heating).
If you psiname oven 4 times a week and also use it to warm up or
defrost other 4-5 times we can save nearly 4.500Wh (4,5 KWh) per
week, ie 72KWh or 8.65 euros each electricity bill!
Conclusion:
We found that only these three movements, reduce consumption
513KWh or 61.56 Euro each electricity bill on a house like this
example!
In one year, the economy is over 1.500KWh involved avoiding
release of more than 1,000 pounds of carbon dioxide in the
environment. Both carbon dioxide produced by the PPC to provide
us with those above 1.500KWh each year. The equivalent result
would succeed in planting over 20 trees outside our house!
And they have no estimate at all using photovoltaics. If you install
and 1.200Wp in solar panels, saving and other 1.500KWh like to
plant another 20 trees yet!
There are many other ways we can reduce power consumption and
thus help protect the environment with a premium on saving
money:
1. Close your TV, DVD, PC etc. the main switch and not the red
button on the remote (or pending). 1 '
2. We often open for long hours on the door of the refrigerator.
Each time you do this, lost nearly 1 / 3 cooling and the motor will
consume extra power to bring back the temperature at the
previous level.
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$ Place the refrigerator to cool in the house, away from radiators
and windows or signs facing the sun.
Can the savings from each practice are just a few euros. But these
add up and show a significant benefit in the end.
The main thing is that these changes do not alter the usual way of
living (though sometimes a change does not hurt if the benefit is
significant). So it is easier to implement because we do not have
the excuse that we are changing for the worse the way we live.
Let's just behave rationally, and nature will render us ..
The basics you need to know about the PV
The photovoltaic system with simple words and pictures
At various points on the website name, for example, photovoltaic
cells (cells) CIS earn 4.5 volts and 90 while the crystalline
miliamper 0.55 volts and 4500 miliamper. What does this actually
will ask a newbie ...
Watt, volt, ampere: Power, voltage, amperage
The Watt can be seen as the product of the Volt on Ampere. That
5V x 2A = 10 Watt. The term trend refers to the Volt, the average
intensity are talking about amps, while the average talk power in
Watt.
We can imagine the stream like water flowing in a pipe: Voltage
(volt) is the speed or momentum of the water in the tube. Intensity
(ampere) is the quantity or volume of water released. The
combination of these two features gives us the power (watt).
Attention to the cables as it can a water pipe to withstand large
volume of water runs with great momentum, so any combination of
voltage and current wants the right thickness of wire. Otherwise it
will melt or catch fire.
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Even the power of a small battery can be done under certain
conditions, cause to burn our house! The more current will pass
through the cables and the greater length of wire, the thicker
should have.
Ask a special event if you do not know the proper cross section.
Login photovoltaic in series and parallel
Connecting the photovoltaic cells in series (with the + - alternating)
sum up the volts and connecting them in parallel (between the +
and - between them) add the ampere (1000 miliamper = 1 Ampere)
cells are interconnected, in order to achieve combination of volts
and amps that we (volts times amps equals watts: VxA = W).
Charge
In order to charge a battery from the sun, should we give about
20% more voltage (volts) from the nominal. Thus a 12V battery will
start charging a voltage above 14.4. A 3V battery with a voltage
above 3.6 klp.Me photovoltaics can be supplied directly to the
devices as a sunny, but not common. Usually loaded with the PV a
rechargeable battery-operated devices that get power from the
battery. The photovoltaic arrange to replenish daily consumption
in Watt that made the devices.
In the above diagram shows the wiring of a simple solar system.
The charge to ensure proper battery charging. The inverter
converts the 12 volt battery, 220 volt to be able to connect up the
devices require voltage 220V.
How a photovoltaic power generating?
A photovoltaic generating every day the nominative power over the
summer and 6 to 3.5 in winter. Thus, a photovoltaic 100Wp can
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expect 550-600 Watt / h (0,6 KWh-kilowatt hours) in the summer
and about 350 Wh (0,35 KWh) in winter, every day on average.
That winter, it will produce 350 Wh EVERY day, but if you divide
the total monthly production of KWh (eg December) by 31 will give
us the number of 0,35 KWh.
Per 1.000 Watt / p solar, total annual output in kilowatt hours (KWh)
will be from 1100 KWh (northern Greece) to 1450 Kwh (southern
Greece). Thus, a 100 Wp panel would produce from 110 Kwh to 140
Kwh per year.
Funny pictures with solar
Solar Energy for the beach:
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caught the attention of thousands of visitors! Come on, and when the next
report energyRES 2009 with more exhibits!
Garden solar lighting
Photovoltaic system for the garden
A solar power system for lighting a garden differs from a normal system
powered by the electricity network that just is not connected to the electricity
network, but powered by electricity from solar energy. The heart of such a
system are the photovoltaic panels that convert solar energy into electricity
1. The energy accumulated during the day from the sun, stored for the
night in a special accumulator (battery) 12V, suitable for solar energy
applications. It could be used even as a large batteries for caravans or
sea craft. The battery has a capacity large enough to supply the lamps
with electricity for several nights, even if we have a few days without
any iliofaneia.Oi different from a normal system powered by the
electricity network. found in three points:
1. In fluorescent lights installed instead of incandescent 12V 230V.
2. Cables used in more cross links (thicker).
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3. The system does not have the clock electricity, but an accumulator
(battery) which is recharged by a solar panel.
For every 4-5 lights require a panel of about 130Wp, an accumulator
(battery) capacity of about 150AI and a charge controller to battery.
Between the battery and lighting installed and insurance. The cost of
such a system is about 1200 Euros.
Because solar energy, such a system with 15 lighting means to
prevent release of 500 kilograms of carbon dioxide into the
atmosphere each year. Equivalents like to plant another 10 trees in
our garden!
The brightness of bulbs for energy-saving 12V 9W, for example,
corresponds to that of conventional incandescent lamps 40W, thus
ensuring very good lighting garden.
A key advantage of this solution is that the fixtures can be placed
anywhere, since only the solar panels need to be placed at a point to
see directly the sun most of the day.
In contrast to simple independent garden lights intended more for
decorative lighting.
Off-grid solar garden lights
The small autonomous solar lights used for decorative lighting, lamps,
because instead of using one or more led.
But they have other advantages such as:
1. No need wiring. Each lamp is built and solar cells and rechargeable
batteries needed.
2. Are cheaper. The average price of a solar lamp is about 20 Euros,
which means about 100 Euros Place 4-5 lights.
3. No need to install an electrician. The metal under the sink very
easily on the ground, in places, but to see the sunlight most of the day.
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As shown in the photo above, assembly is easy:
1. The two outer wires of the board go in positive and negative terminals of the
battery.
2. The two internal wires of the board go to their respective poles led.
3. The positive and negative power of the photovoltaic go to the respective
poles of the battery to charge it from the sun.
When I say battery, I mean a three compartment three batteries with
rechargeable AA batteries of 1,2 V (with a capacity of at least 2.000AI).
I put them all in a waterproof plastic electrical box, which had opened a small
hole for projecting the photoresists of the electronic circuit board (PCB) and
another one to come out the wires going to the lamp and led to PV. The board
- night sensor, the photoresists understands the darkness to automatically turn
on the lamp. Similarly understands and daylight to turn off the light. The sensor
night was the hardest part, after the market offered only to 12V, while the kit
needs to 3,6 V. Okay, just looked and found how to convert a kyklomataki 12V
to 3,6 V (once I get some time to convert some friends and not electronic) ...
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The photograph shows the final installation. The box containing the light kit
fastened to the back of the photovoltaic element. The lamp led light coming
into the outer space from a hole that opened at the top, as shown in next photo
(the kit could be put in and the light for not shown). Insulation gaps with
silicone to protect from the rain
His performance is more than adequate, and illuminate for many hours at
night, those was the peak hours of sunshine a day and a bit more!
If that is a summer day saw 6 hours of intense sunshine will glow for about 8-
10 hours a night. The winter count to work for about 6-7 hours a night.
The photovoltaic panels instead of inserted at the top of the lamp could be
placed lower, for example based on a piece of sheet metal in the base of the
lamp, or beside the lamp on a wooden or metal pasalaki.
Other uses of lighting kit
As mentioned above, lighting kit can be used elsewhere. With 3 kit (without
natural light metal) placed next to each other on an elongated plastic, wood or
aluminum base, can illuminate an advertising billboard. With 3 or 4 kits can
illuminate even a small room or store! In the latter case not even need the
board sensor-night, after we can turn on a switch (and thus greatly reducing
the cost).
The cost for the entire lighting kit
7.00 Euros luxeon led
12.00 Euro plate sensor night
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28.00 Euro PV
Total 47.00 euros. Other cost me 9.00 euros in outdoor lighting. With less than
450 euros to say, I'll post 8 solar garden lights that do work! An electrician
would ask about 2,000 euros, not counting the electricity bill and the table or
the clock, like digging in the garden ...
I do and good for the environment. And if need be in no blackout, bring 2-3 of
these solar lights in the house ...!
Powerful solar garden lights
A simple and economic construction for strong solar garden lights with solar
Here you will see how a very simple way (and very economical) to illuminate
your garden or balcony with our free energy from the sun! The solution is so
simple that literally can implement each ...
Let's start with the problem: In ordinary commerce solutions have the following
problems:
1. There are cheap solar garden light, but shine less and a candle ....
2. There are some solar lights that are relatively strong but is very expensive
(around 100 euros each), since it requires several strong solar panelakia (one
on each lamp) which is expensive and often ugly because of their size.
3. Finally, there is the most expensive option (over 1,000 million) in ordinary
garden lights with energy saving bulbs instead powered by the electricity
network, connected to a central powerful - and expensive - a large solar panel
and battery (because of high consumption due to multiple lamps even run for
several hours each evening).
The best solution therefore would be the 3rd of these, provided they do not
require large solar panels and large battery (battery) is very expensive ... So
we need to reduce power consumption by using even lower power bulb. In the
photo below we see a spot that lights 12V 18 led by consumption and is only
1,3 Watt at 12V (four times lower than that of smaller energy-saving lamp)!
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Then purchased four of these garden lights traded. All are appropriate, no
matter if it is solar lighting or usual for the electricity network. Simply place a
normal light bulb located in the the above spots such as the following photos:
So I prepared four fixtures. At the end located at the top of all the lighting and
the end result is flawless and professionally: As we see in the picture above,
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the specific exit at the bottom of each lantern come two wires - one black and
one red (negative and positive respectively).
The cable connections for lighting, battery and the photovoltaic charge
regulator
All black (negative) wires connected to the lighting of the corresponding slot
loading control (marked with - minus). All the red (positive) wires connected to
the corresponding slot loading control (marked with a + co), as in the photo
below the two slots on the right to charge controller
:
Of the two slots in the messaies charge controller (again marked with plus and
minus), start the wires leading up to the respective poles of the battery as we
will see below (positive to positive terminal of the battery and the negative to
the negative terminal of battery) .
The two left jacks (which again marked with plus and minus on the charge
controller) are the two relevant wires photovoltaic panels to charge the battery.
The cables must enter a specific channel (eg, coils) to be protected from the
weather, as they have a battery with the governor placed in a waterproof box.
The thickness of the wires need not be very big. Cross-section of 2,5 mm is
sufficient, unless the lights or battery or solar panels are large distances
between them (eg more than 10 meters apart from each other).
The final result
The governor has the ability to automatically turns lights until dusk and to
switch off after 2 to 12 hours (adjustable from us). At the same time ensure
proper forisi and discharge the battery to protect it from premature wear.
The consumption of this system is 41,60 Wh (Watt hours) for 8 hours every
night (4 lights x 1,3 Watt X 8 hours). So we covered a small photovoltaic panel
of 10 Wp, which is a sunny day produces about 50 Wh (Watt hours).
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When the battery is required need not be large: a small - and cheap - 12volti
lead battery with a capacity of 12 AH (ampere hours) gives us not only eating
one day, but also provides additional autonomy for two or three days without
sunshine. In Greece we have sunshine 300 days a year!
In the photo below appears and the actual outcome of these four lights:
Pretty impressive, especially for easy construction with minimal cost!
Cost
The photovoltaic panel costs 55 euros, 45 million the governor and four spots
28 euros (7 euros each). These lights cost 9 euros each, but as noted above,
all kinds of lighting is appropriate. A 12volti 12 AH lead acid battery (like those
used by bikes) costs 30 euros. Make a small car battery.
For 8 lights, doubling the battery capacity (or put second battery) and get a
second panel. The governor is the same, no further need for having resistant
up to 5 solar panels (ie up to 20 fixtures with these spots). The same is also
true for 12, 16 or 20 lights.
Wind and Photovoltaic
Connecting a wind turbine system with solar panels, creating a hybrid system
Photovoltaics produce electricity when there is sunshine. Wind turbines
produce electricity when the wind blows or there is sunshine or not.
And usually when it is cloudy (mostly in autumn and winter) the days of wind
are frequent.
It is always recommended, an autonomous photovoltaic system to be backed
by a wind turbine.
The size and power of the wind depends on many factors such as the point of
installation and whether it is exploitable wind resources, our needs, the size of
the solar system (if there), etc.
A small wind turbine of 400W (at 12,5 m / sec) can give us even more than
200 KWh per year (annual average wind speed 4,0 m / sec).
What should however be borne in mind is that wind turbines are not suitable
for urban environments. Be placed in a fairly large amount and that no higher
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barriers around them within several meters. Which usually does not apply in
residential areas.
Articles on the wind turbines and wind energy
183
The holes intended for the rays of the wheel on which should be incorporated
into the motor, I spent long screws 3mm thick to support the motor on a steady
basis, as shown in the previous and the next photo:
Then I opened the centers are a piece of plywood a hole one centimeter (as is
the shaft of the motor that is) and a nut fastened to the axle of the wheel on
the other side. Because I used plywood, put a disk wheel angle for support. If it
was the base metal and not plywood would not require payment (see next
184
photo).
Because the building was a test, I used wood, plywood for convenience. The
right is to use rigid metal plate for greater durability.
The next two photos shows the way in which it rotates: the axis is stable in the
lower base, mounted with nut. The metal body of the motor is what rotates
around its axis.
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186
On the turntable will be placed below the cut pvc pipe to cause the rotation of
the air will receive on them.
Vertical Axis Wind Turbine
The construction of the wind
Upon completion of the lower part of the turbine including the motor and base
rotation, went to the construction of the upper wind turbine which is essentially
a place that welcomes the wind and spun from them. This rotation of the
turbine rotates and the shaft of the motor mounted at its base.
I bought a PVC pipe with a length of 140 cm and 30 cm in diameter and cut
them along the middle to get two parts of a length of 140 cm each.
These vidothikan on the turntable motor to the device shown in the figure
below:
The way the two screw segments of PVC pipe on the turntable that I had made
at the top of the motor, shown in the photo below
:
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188
189
In the same
way I posted
and another
rectangular
piece of wood
on top of wind turbines to the whole structure more compact:
Having painted all parts of the turbine with a shiny black (gloss for less friction
of the wind), the result was what appears in the following photo:
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3. A piece of twine or more thin line length 30 cm
4. A ping-pong
The spirit level is used to place the protractor correctly and with precision
(horizontal) to the ground.
The thread started sticking in the center of the straight side of the angle (at 90
degrees that is). At the other end of the yarn in glue ball.
The following figure shows the integrated anemometer
Where it blows no wind, the ball does not move the yarn passes over the term
of 90 degrees of angle. When wind blows, as the wind speed, the ball moves
from its original position so the thread goes through some indication of the
angle that is less than 90 degrees.
From the table below can match marked degree with a fairly accurate estimate
of wind speed. If you want to convert the unit from meters per second (m / s) in
kilometers per hour (Km / h), just multiply by 3.6.
Degrees - Speed (m / s)
90 ° ------- 0.0 (no wind - calm)
85 ° ------- 2.6 m / sec
80 ° ------- 3.6 m / sec
75 ° ------- 4.5 m / sec
70 ° ------- 5.3 m / sec
65 ° ------- 5.9 m / sec
60 ° ------- 6.6 m / sec
55 ° ------- 7.3 m / sec
50 ° ------- 8.0 m / sec
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45 ° ------- 8.7 m / sec
40 ° ------- 9.5 m / sec
35 ° ------- 10.4 m / sec
30 ° ------- 11.5 m / sec
25 ° ------- 12.8 m / sec
20 ° ------- 14.4 (almost stormy wind)
Below 20 degrees does not make sense to continue, because there is nobody
there to see! With winds over 20 m / s (very squally wind) better to be in an
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underground bunker less than a turbine (especially if you have it fix itself ...
In the above left photo is calm, so that the thread passes from the sign 90
degrees. In right photo, the wind ysa pushes the ball to the right, so now the
thread enters the sign 80 degrees.
From the table we saw earlier, the sign of 80 degrees represents a wind speed
3,6 m / s (meters per second), or otherwise 13 km / h (kilometers per hour).
Wind horizontal or vertical axis
Compare advantages and disadvantages of each type
The first dilemma was whether to proceed with the wind horizontal or vertical
axis.
Horizontal axis (HAWT - Horizontal Axis Wind Turbines) are turbines which
rotate around a horizontal axis on the ground.
Is the usual picture of the wind we have most in our minds, as they have
prevailed for several reasons which I will mention below.
In the picture above we see such a horizontal axis wind turbine. The blades of
rotating around an axis that is horizontal to the ground.
It is clear that every moment must be oriented towards the wind.
Vertical axis wind turbines (VAWT - Vertical Axis Wind Turbines) instead
revolve around an axis perpendicular to the ground.
Wind turbines vertical axis by means of the construction, "catching" the wind
from every direction.
In the next photo depicts a wind turbine vertical axis type "savonius", which is
the simplest in terms of its construction.
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It consists essentially of a tube cut in half lengthwise, the two pieces placed
vertically as in the following plan (what we see when we look at the vertical
wind turbine vertical axis type "savonius" from above)
:
This type of vertical axis is called "savonius" and is the easiest to build (you
guessed it, is the type of turbine with lower performance) ...
Are there other types of vertical axis wind turbine, which improve performance
significantly (eg "darrieus"), but never reach the efficiency of a properly
designed horizontal axis wind turbine, which is why they have prevailed.
So let's try a comparison of two types of wind turbines, to see the advantages
and disadvantages in the Wind vertical axis and horizontal.
How much energy is in the wind?
Practical calculation
Here we see the simple formula with which we can calculate the force that can
provide a wind turbine. Resulting from the combination of kinetic energy is the
wind and the ceiling that we can turn it into a mechanical / electrical, as
described by the German scientist Albert Betz.
Kinetic Energy: 0.5 x mass x (speed squared)
The mass is calculated in Kg and the speed in m / s (meters per second). The
kinetic energy is in Joules.
The density of air at zero altitude is 1,23 Kg per cubic meter. So the mass of
air passing through the surface covering the blades of a turbine, resulting from:
1.23 The case for wind turbines installed at the same level as the sea - as we
climb in altitude is changing, but not enough to severely affected by the
outcome.
This is the power of the wind. The Albert Betz calculated that the maximum but
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we can convert the kinetic energy of wind into mechanical energy to drive a
rotor (as in a turbine) is 59.3%.
So here goes and the limit of 59.3% and the loss of wind (friction, cable, etc.).
So often the ultimate power to take from the horizontal axis wind turbines are
30-40% of the power of the wind calculated with the formula above. Vertical
axis wind turbines in the figure is 15-30%.
Example:
Suppose we have a wind turbine mounted at the height of the sea, with rotor
diameter of 5 meters (ie two and a half meters in each wing). We can calculate
the force that can give wind speeds of about 12 meters per second (m / s).
The area covered by the rotor is in p [(diameter divided by two) squared],
namely:
Area (m2) = 3,14 x (2.5 x 2.5) = 19.63 squares meters (m2).
Thus, according to the type of wind power:
Power (Watt) = 0,5 X 19.63 X 1.23 X (12CH12CH12) = 20.861 Watt
Taking into account the limit of Betz (59,3%), we see that the strength of this
wind turbine at wind speed 12 m / s can not exceed the 20,861 X 0,593 =
12.371 Watt.
In practice however, due to other losses, giving from 6.000W to 9.000W and
this is the best (well-designed and high wind)! If indeed it was a vertical axis,
would lower performance and power would be equivalent to 6.000W 3.000W
than most.
And turbine performance curves
The power rating indicates a wind turbine by itself does not tell us much about
the energy that can give us. Indicates only power that can give the wind to a
specific wind speed.
For example 400W to 12,5 m / s (meters per second). Ordinary wind but
around 4-6 m / s and very few hours time we have 12,5 m / s.
What you need to know is this: For wind speeds prevailing in the region to
install a wind turbine, how much power can give any wind turbines compare?
Some wind turbine is suitable for lower speed wind turbine and another the
opposite. It is good to look and performance curves for each turbine at various
wind speeds and of course we know the wind speeds prevailing in
establishment.
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Each turbine has its own yield curves, for example above regarding small wind
turbine 400W. But we can see that the nominal power of 400W is reached in
wind speed of about 12,5 m / s which is valid for a few hours time.
Usually when windy, the wind speeds are between 3 and 7 m / s in most areas
that interest us. At these speeds, but as we see from the first curve, the wind
only produces about 50W of power!
If we know the average annual wind speed in the region of interest, then the
second curve we find a (very rough) estimate of the monthly production KWh
(kilowatt hours) of wind. One size clearly more useful than before.
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For example, the annual average wind speed 4,5 m / s can expect the wind
around 18 to 25 KWh per month, depending on how good the location of
installation (obstacles, height, soil, altitude, air density , temperature, etc.).
Data on average wind speed, we can look at weather services (such as NA).
The yield curve of a wind turbine manufacturer helps to have an initial idea and
to facilitate comparisons.
Does not mean that if we calculate again the yield curve for the same wind
turbines installed in a location that we get the same results.
There are other factors that may affect the result (a different land, air density,
etc.).
Most manufacturers provide curves and estimated (annual or monthly)
production in KWh (kilowatt hours) for a wind turbine. This is much easier,
since this is the size that ultimately concerns us.
But it is calculated in specific circumstances ... And while removed our facility
from the ideal, the lower is the production of wind turbine (much lower).
Τεύχος 028 - Νοέμβριος Τεύχος 027 - Οκτώβριος Τεύχος 026 -
2009 2009 Σεπτέμβριος 2009
Τεύχος 025 - Ιούλιος Τεύχος 024 - Ιούνιος 2009 Τεύχος 023 - Μάϊος
Αύγουστος 2009 2009
Solar Cube: A system for providing potable water and electricity for emergency
197
The Solar Cube is a product of Swiss Company Spectra Watermakers has the
ability to produce electricity through integrated photovoltaic panels and wind
available and the ability to clean water from any source or desalination of
seawater. The Solar Cube is supplied ready for installation, which lasts only a
few hours and can be used to provide water and electricity to remote areas or
emergency situation. It comes in 3 versions:
• SSW 3500: Produces 3500 liters of water per day from seawater
• SSBW 6500: Produces from 3500 to 6500 liters of water a day depending on
the extent of salt water
• SFWS 15000: It produces 15,000 liters per day from any source not saltwater
removing viruses and bacteria without chemicals
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At this point it must be specifically mentioned another factor that affects
performance and is no less than the temperature. Basically it's the reason that
caused the interest in research on the hybrid (solar-thermal) collector systems
for heating water.
While the power output of a cell can be increased considerably by using a
monitoring mechanism to track
maintain the PV is directly perpendicular to the sun, or concentrating sunlight
using lenses or
mirrors. However there are limits to this process because of
complexity of the mechanisms and the necessary cooling
cells.
In particular the increase of temperature in cells caused a corresponding
increase in the endogenous concentration of semiconductor bodies, so that
more reunions bodies. This reflected stronger leakage current through the
diode resulting in a lower oc V
and FF (fill factor) by reducing the degree of
photovoltaics
The typical curve of variation in performance of photovoltaic silicon as a
function of temperature.
The scale of the ordinate gives the percentage of performance relative to the
apodositou in conventional temperature 20oC. The range of temperature on
the abscissa are logarithmic.
The scale of the axis of tension gives the percentage of performance relative
to the performance of the conventional temperature of 2 0 oC. The range of
temperature on the abscissa is
logarithmic. While the following shows the effect of temperature on
IV curves of a typical silicon cell. Observe that
power production is relatively stable at higher temperatures but the trend is
reduced (reduction of about 0,0023 Volts for each increase of a degree
Celsius).
Typical curve of variation in performance of silicon photovoltaic cells as a
function of temperature. The scale of the axis of tension gives the percentage
of performance relative to the performance of the conventional temperature of
2 0 oC. The range of temperature on the abscissa is logarithmic.
While in the following figure showing the effect of temperature on
IV curves of a typical silicon cell. Observe that
power production is relatively stable at higher
temperatures but the trend is reduced (reduction 0,0023 Volts
Any increase of about one degree Celsius) to 31% [1]. However, the most
common material used is silicon because of its low cost and the advanced
technology that accompanies it, due to widespread use in the electronics
industry. His performance can theoretically reach close to 28% but now has
exceeded 25% in laboratory scale failure to achieve higher efficiency losses
due to reflection, shading from the electrical contacts, lack of
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absorption of radiation by a semiconductor, loss of cargo
before harvesting and the cornerstones thermodynamic-economic level
energy conversion. At research level is an attempt
reducing losses using different techniques [hile examined and
combinations of materials can theoretically yield more
50%
3.4.1 silicon solar cells
The material used widely in industry for PV
cells is silicon (Si). Silicon is a semiconductor
an indirect energy gap of 1,1 eV. Although these two properties
(Indirect and relatively small price gap) is not ideal for
photovoltaic conversion of solar radiation, silicon is
semiconductor dominated from the start but until today, as
material of solar panels. The reason is perhaps that the
pyritioechei already rich past 3-4 decades as the main material
provisions of semiconductor electronics. Therefore
properties are well studied and the material placed on
market in large enough quantities, with sufficient purity and perfection of
crystalline structure, using technological methods proven successful.
The telikostadio sygkollisiton the electrodes on the front and back of the tablet,
the interconnectedness of finished components, coverage
front surface with a reflex coating to reduce reflection of light and tight
packaging within
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The PV silicon elements can be distinguished according to the structure of the
basic
equipment or means of production. The different types are:
62
• (Single-crystal Silicon or c-Si). The basic material is
monocrystalline. The thickness of the material is relatively large
(300mm). The performance, with the type of cell,
ranging from 21% to 24%, while the form of PV
frameworks, ranging between 13% to 16%. Characterized
by high construction costs.
• PV elements of polycrystalline silicon (Mylticrystaline
Silicon or mc-Si). _ynatotita of large surfaces. Usually cut into square shape
data. They consist of thin layers with a thickness of 10 to 50 micrometers. On
the surface of the cell, there are different monocrystalline areas. The limits are
the positions of trapping bodies. So the smaller the total length of marginal
areas in a given dimension PV component, the better the electrical
conductivity of them. In general, the larger the size of single crystal regions of
multicrystalline photovoltaic modules, the higher their performance, ranging
from 17% to 20% in laboratory cell form and 10% small (calculator) to large
(under fixed or flexible format).
• PV hybrid components. The so-called hybrid combining
technology of amorphous and single crystal, exploiting the advantages of both
technologies. When combining the advantages of both was higher degrees of
performance per area needed. In contrast, however, construction costs are
quite expensive and the photovoltaic modules of amorphous silicon and of
course the photovoltaic modules of crystalline silicon.
Finally, in the following table shows the tabular attributes of different types of
PV silicon components for easier comparison of the.
201
The relatively large energy gap of gallium arsenide YOU result of his good
behavior in some extreme temperatures. This is a property of particular
importance also for centralized systems, where solar cells are often heated by
strong radiation they receive. Specifically, the performance of gallium arsenide
solar panels dropped to half compared to their performance in the usual room
temperature, when heated to 200 Co. The corresponding decrease in solar
modules of silicon (Si) are already in 120Co, while the most sensitive elements
of cadmium sulfide (CdS) in 80Co.
202
The highest yields of the gallium arsenide solar cells, have provided data on
eteroenoseon semiconductor alloy system 1 xx Ga Al As -, where x takes
values from 0 to 1. Experimental solar cells of this type measured yields about
24% which is very close to the theoretical maximum (31%).
66
3.4.2 Solar elements cadmium sulfide (CdS)
The cadmium sulphide (CdS) is a semiconductor with a direct and relatively
large energy gap (2,45 g E = eV), which is used to
optoilektrologikes successfully in many applications, such as the
Construction photocells, light amplifiers, fosforiston,
radiation detectors, etc. The cadmium sulphide behaves
usually as a semiconductor type n. _iladi bodies are most
the free electrons, without adding foreign
individuals-donors. Previously it was assumed that the operation of the
photovoltaic cells from cadmium sulphide, a front electrode made of copper,
due exclusively to cadmium sulphide, so prevailed
name as evidence of cadmium sulphide. Today it is known that
due to eteroenosi between the sulphide layer
cadmium and a thin layer of sulphide copper
formed by the action of cadmium sulfide in copper,
which as we have built the front electrode. The
composition of the layer that is usually attributed to the chemical formula
2 Cu S, but it is more correct to write x Cu S, where x
ranging from 1.96 to 1.99. The x Cu S is also a semiconductor with
indirect energy gap of 1,2 eV, and a character type p. _iladi
bodies are most holes without adding impurities.
The energy gap of x Cu S is quite favorable for
absorb photons of solar radiation. But it too
short diffusion length of minority actors, about 50 nm, and
thus the thickness of the layer must be correspondingly small
ie not exceeding 150 nm (ie 0.15 mm). Moreover, as
reported the energy gap of cadmium sulphide is relatively
great, so the layer of photon absorption is small.
The result is that the density produced in fotorefmatos
solar modules / x Cu S CdS ie Amperes of current per
unit area of the element is small, about half
compared to silicon solar cells. The quantities of solar modules / x Cu S CdS is
still small, but believed that there are significant mellontikesprooptikes they
can be made from relatively inexpensive materials and simple methods.
The solar modules / x Cu S CdS are quite satisfactory performance,
about 10%, but there are some doubts about the stability
, especially the influence of solar cells work 3.4.3 arsenious gallium (GaAs)
The arsenious gallium (GaAs) is a semiconductor with energy
gap of 1,43 eV. This value is the optimum for
203
photovoltaic conversion of solar radiation, with a theoretical
yield about 25%. Moreover, the energy gap is direct.
Therefore arsenious gallium (GaAs) combines the principle ideals
requirements for use as a solar manufacturing
photovoltaic cells. The research effort has
recent development is intense and it is believed that soon the
gallium arsenide will find important applications, especially in the solar
elements concentrated radiation, although the cost is
larger than silicon, about five times. Aggregating
However, photovoltaic systems, electric power generation by
unit area of solar cell is large enough, since
68
accept increased density of radiation, and therefore not
very important cost solar cell.
The relatively large energy gap of gallium arsenide has
as a result of his good behavior in some high
temperatures. This is a property of particular importance also
on centralized systems, where solar cells are often
heated by strong radiation they receive.
Specifically, the performance of solar modules arsenide
gallium drops by half, compared to their performance in
normal room temperature, when heated to
200 Co. The corresponding reduction in silicon solar cells (Si)
already observed in 120Co, while the most sensitive
elements of cadmium sulfide (CdS) for 80Co.
Larger yields than arsenide solar cells
France, have given information on semiconductor eteroenoseon
alloy system 1 xx Ga Al As -, where x takes values from 0
to 1. Experimental solar cells of this type
measured yields about 24% which is very close to
the theoretical maximum (31%) [1].
73
Figure 4.3: Typical solar thermal (PV / T) system.
Finally, as reported by various researchers using
systems PV / H not only to increase the degree
performance and the strength of materials. It is observed that
Prolonged exposure of photovoltaic cells at high
temperatures adversely affects the durability and strength
system [11] [14].
4.2 NEED FOR DEVELOPMENT T_N PV / H
The development of PV / H systems was not only for technical
reasons but for economic reasons. It is obvious that reducing
operating temperature of cells increases the efficiency and
hence the displacement of a market that is trading capacity. The
204
74
development of various technologies are inextricably linked
their economic potential.
According to studies conducted by the EPFL (Ecole Polytechnique de
Lausanne) in Switzerland showed that it is essential to thinking about
thermal applications. The prospective application of hybrid PV / T
devices will have a positive contribution to the broader market for PV
systems and is probably another way to broaden
use of PV, which would have the opportunity to
through use of hybrid PV / T devices without
need large subsidy [15].
According to studies done have shown that integrating
units of heat dissipation in PV significantly reduce the time
depreciation on investment. Features indicated by
Tripanagnostopoulos, Tselepi, Souliotis and Thun, in accordance with
investigating who did it, that the inclusion of an extraction unit
Heat can reduce the time to decay and 2.5 times
if it is incorporated into polycrystalline solar system
silicon (pc-Si) and up to 4.5 when it incorporated in
photovoltaic amorphous silicon (a-Si). This is
that the polycrystalline silicon photovoltaic
(Pc-Si) have nearly twice the cost per aperture area to
compared with amorphous silicon photovoltaic (a-Si)
[13.65]. A finding from the same study is interesting
is that while the use of a diffuse reflector increases
electrical and thermal performance affects little time
depreciation on investment.
In addition, as mentioned in the literature using hybrid
photovoltaic (PV / T) system performance
increases significantly while the cost of the total energy produced
cash gain of heat in water and air. In this way
presents the historical overview that follows and is divided into
two parts.
4.3.1 History of PV / T water systems (PV / T water)
The first work on the PV / T water was flat panels
by Martin Wolf [22], who dealt with a constant
silicon photovoltaic in series with heat sink without
concentrator using a battery to store the
energy. The investigation concluded the prospects and benefits
this technology. After researching the pioneer Martin Wolf
In 1976, the object of collectors FB / H-water was investigated by
many institutions such as MIT. The first demonstration of the project
was conducted by Professor Boer, who used 13 panels
PV / T water in his house in 1978. During the period 1974-1978
205
research on the photovoltaic and hybrid photovoltaic
water systems were at the University of Arizona (Arizona State
University). Much attention was paid to modeling these
systems for the applications in TRNSYS. This work
extended to flat panels FB / H, which is the
based on the PV / T model type used TYPE50
even today in 1978 in the laboratory Lincoln (MIT Lincoln laboratory) managed
206
(6.5% electrical efficiency and thermal efficiency 40%). For this
why a second generation of PV / T collector was constructed,
consisting of PV / T water with the previous project, two
developed experimental PV / T air, and three newly developed PV / H
water (pipelines with dual flow design without glass cover, and
dual-phase freon where the PV / T acts as the evaporator
heat pump). The first two types of PV / T and developed
While the first built by MIT and the Spire
Corporation and the other by Solar Design Associates and Spire
Corporation beneath the high supervision of MIT. Results
investigations and the final report issued in these
many publications in the laboratory Sandia, there have been many
research on the effects of heat on the electrical performance.
In 1980 he began studies in the laboratories of JPL and
Brookhaven for the further development of PV / T collectors.
Although most studies became in America, some
research efforts became in some other parts of
world. In Japan, Sharp has built two novel
flat PV / T collectors and slavery on the
concentrators for PV / F was made by Nakata et al. In
Germany, Karl developed and tested by photovoltaic
krystallikopyritio (c-Si) with glass cover (with
AEGTelefunken) and France have been several studies on the
PV / T systems with condensers
_stoso in 1982 following the oil crisis created a large
worldwide interest in renewable energy
mainly to solar energy. Yet in America
interest in renewable energy was not the same
intense. The first years of government Reagan (1981-1989) the
funds earmarked for renewable energy was
obviously limited. Most groups working on
the PV / T systems have stopped research with the exception of
SunWatt devoted to fixed systems PV / F low
Starting concentration of the growth of FB / F systems, SunWatt
built and installed over 100 PV / T water collector
from 1981 to 1989. Also during the early
80 were some individual efforts in Europe and more
particularly in Switzerland at the institute in a micro
University Niousatel (Institut de Microtechnique de l '
Universite de Neuchatel) and in Yugoslavia. While in
90s, Europe was moving towards renewable
energies mainly due to the global recognition of
problem of global warming.
In the Netherlands, research on the PV / T system began in
207
1989 to institute TNO in cooperation with the Foundation HES, which
extra weight given to the study of systems PV / T without
cover for heat pump applications. Another important
attempt was made to the University of Aitchofen (Eindhoven
University of Technology-EUT) where it was thesis
(1994-1998), and focused on the study of FB / F systems
glass cover. In 1999, the company Ecofys, TNO and the institution
University Aitchofen (EUT) did a survey in cooperation
the technologies and market PV / T systems the same
year, the research on the PV / T systems at the University of
Aitchofen moved to the center of the Netherlands Energy Research
interest in renewable energy was not the same
intense. The first years of the Reagan government (1981-1989) the
funds earmarked for renewable energy was
obviously limited. Most groups working on
the PV / T systems have stopped research with the exception of
SunWatt devoted to fixed systems PV / F low
Starting concentration of the growth of PV / T systems, SunWatt
built and installed over 100 PV / T water collector
from 1981 to 1989. Also during the early
80 were some individual efforts in Europe and more
particularly in Switzerland at the institute in a micro
University Niousatel (Institut de Microtechnique de l '
Universite de Neuchatelkathos in Yugoslavia. While in
90s, Europe was moving towards renewable
energies mainly due to the global recognition of
problem of global warming.
In the Netherlands, research on the PV / T system began in
1989 to institute TNO in cooperation with the Foundation HES, which
extra weight given to the study of systems PV / T without
cover for heat pump applications. Another important
attempt was made to the University of Aitchofen (Eindhoven
University of Technology-EUT) where it was thesis
(1994-1998), and concentrated on the study of PV / T systems
glass cover. In 1999, the company Ecofys, TNO and the institution
University Aitchofen (EUT) did a survey in cooperation
the technologies and the market for PV / T systems [21]. The same
year, the research on the PV / T systems at the University of
Aitchofen moved to the center of the Netherlands Energy Research
(Energy Research Centre of the Netherlands-ECN). In the ECN was
Important work on the design of different
systems [
In Germany, manufacturers Zenith, Solarwerk and Solarwatt
developed a prototype PV / T collector in the 90s, but
208
Unfortunately it was not possible commercial exploitation of this
collector [39]. The panels manufactured by Solarwatt
were designed to establish a demonstration program in
Malteser Krankenhaus, but instead of the PV / T collectors
Simple installed PV panels.
In _ania, a research program on the PV / T systems
produced by companies that manufacture solar Batec
collectors, the Racell manufactures PV systems, and the company
Advisers Esbensen Consulting engineers. These systems
tested and installed in 2000. However, given the small
dynamics of Danish renewable energy market, the Batec
decided to terminate its involvement with the development of PV / T and
Racell the continued effort in this katefthynsiSimantiki work on the PV / T
systems has been and
University of Patras
In Germany, manufacturers Zenith, Solarwerk and Solarwatt
developed a prototype PV / T collector in the 90s, but
Unfortunately it was not possible commercial exploitation of this
collector [39]. The panels manufactured by Solarwatt
were designed to establish a demonstration program in
Malteser Krankenhaus, but instead of the PV / T collectors
Simple installed PV panels.
In _ania, a research program on the PV / T systems
produced by companies that manufacture solar Batec
collectors, the Racell manufactures PV systems, and the company
Advisers Esbensen Consulting engineers. These systems
tested and installed in 2000. However, given the small
dynamics of Danish renewable energy market, the Batec
decided to terminate its involvement with the development of PV / T and
Racell the continued effort in this katefthynsiSimantiki work on the PV / T
systems has been and
University of Patras. These relate the experimental
Comparative studies on the PV / T systems with or without glass
cover, with or without diffuse reflector Also
economic viability of these systems is subject
many studies. In addition, Cyprus has a numerical study
thermosifonikoutypou on a PV / T system where
presented and an extensive bibliography about the
system modeled in collaboration with the University of
Patras.Energy Research Centre of the Netherlands-ECN). In the ECN was
Important work on the design of different
systems
In Germany, manufacturers Zenith, Solarwerk and Solarwatt
developed a prototype PV / T collector in the 90s, but
209
Unfortunately it was not possible commercial exploitation of this
collector [39]. The panels manufactured by Solarwatt
were designed to establish a demonstration program in
Malteser Krankenhaus, but instead of the PV / T collectors
Simple installed PV panels.
In _ania, a research program on the PV / T systems
produced by companies that manufacture solar Batec
collectors, the Racell manufactures PV systems, and the company
Advisers Esbensen Consulting engineers. These systems
tested and installed in 2000. However, given the small
dynamics of Danish renewable energy market, the Batec
decided to terminate its involvement with the development of PV / T and
Racell the continued effort in this direction [40].
Important work on the PV / T systems has been and
University of Patras. These relate the experimental
Comparative studies on the PV / T systems with or without glass
cover, with or without diffuse reflector Also
economic viability of these systems is subject
many studies. In addition, Cyprus has a numerical study
thermosifonikoutypou on a PV / T system where
presented and an extensive bibliography about the
system modeled in collaboration with the University of
Patras.
In Israel, developed a commercial collector PV / T without
glass cover. Initial focus was on trying to reduce
overheating of the PV is a very serious problem
desert of Israel. The winter of 1991/1992 such a PV / H
system Klil settled in a small town in Israel. The PV / F
collectors originally manufactured by a company Chromagen,
But from 2002 onwards, the production company went to the Millennium
Electric. From that time onwards was the Millennium Electric
exclusive rights for the production of PV / T. In 2004
Millennium Electric has launched in collaboration with the technology
University _anias (Technical University of Denmark) the
program MULTISOLAR. The program is a MULTISOLAR
subsidized by the European Union project to develop
PV / T systems in buildings built for the European market.
The programs for the development of PV / T system is not running
only in Europe but also in the world. University
Hong Kong (City University of Hong Kong), Professor Chow
created a potential model for the PV / T collectors where
used to calculate the efficiency water heaters
systems [43]. In China University of Technology (University
of Science and Technology of China) made a sensitivity analysis of
210
these systems [44].
Finally, in America the main programs made by companies
PowerLight and SDA. Specifically, the company PowerLight
aneptyxeta focused and PV / T systems without glass
cover, metal-based amorphous silicon cells (a-Si) for
Collectors pools. _stoso problems had to do with
production cost and reliability of products made
prevents the production of PV / T systems [45]. About
SDA focused on the development of PV / T collectors glass
cover. But commercial production is started ever since the
initial capital investment was too great to justify
than-expected earnings.
211
transparent photovoltaic systems mounted on top of
air collector without glass cover [49]. This plan
favored over the project when the wind was in the intermediate
space between the PV and the top cover. Because of
highest temperature occurs in the latter. Thermal
yield was around 40%, with an obvious dependence on
wind speed.
In 1994, the PV / T air collector Capthel, developed by
French company Cythelia [50].
Also in early 1990, in Israel, developed a PV / H
collector who also launched on the market with a unit
gain heat and water and air. [51]. But why
existence of unit gain heat air was clean to
cool the system (ie the absorbed heat is not the
used somewhere but eliminated in the environment).
The German company Grammer Solar and _aneziki company Aidt Miljo to
collaborate on developing a PV / T collector with a small
PV rate [40]. In this type of system only one
fraction of the absorber is covered by photovoltaic just
cover the energy consumed by the fan. This
system is mainly used in autonomous applications Inn
for dehumidification. The company also developed Grammer Solar
and took the market PV / T air collector where the absorber is
completely covered with solar panels. The first demonstration project
was in 1996 (to warm air ventilation installation
painting in Nuremberg).
In Canada, companies Conserval Engineering, Bechtel and CANMET
developed in cooperation of the PV system SOLARWALL. The system
was examined experimentally for heat and electricity
of performance before being used in various applications [52].
At the University of Patras were extensive research on the PV / H
systems and water and air without glass cover [41]. The
best performance was found to have the PV system is in
direct contact with the surface and the absorber tubes,
while a stream of air from the space underneath the surface
the absorber can provide warm air. Moreover, the heat
optimization of PV / T solar air collector, placing a foil
studied experimentally [53.54] and numerically. [55].
In America, the University of Miami (University of Miami), the
Sopian researcher did his doctoral thesis on a
I double-pass solar air collector, who continued this
work at the University of Malaysia (Universiti Kebangsaan
Malaysia) [56]. Furthermore investigated and PV / T air collector double
Passage of low concentration.
212
In Egypt, Hegazy omeletitis to compare
various types of PV / wind systems, I did a study
an emulation program, where the efficiency of PV / T collector
double pass caught the attention.
Finally, a job peirametriki Tiwari and Sodha was over
PV / T systems with and without glass cover. The two researchers
for dehumidification. The company also developed Grammer Solar
and took the market PV / T air collector where the absorber is
completely covered in solar panels. The first demonstration project
was in 1996 (to warm air ventilation installation
painting in Nuremberg).
In Canada, companies Conserval Engineering, Bechtel and CANMET
developed in cooperation of the PV system SOLARWALL. The system
was examined experimentally for heat and electricity
of performance before being used in various applications [52].
At the University of Patras were extensive research on the PV / H
systems and air and water without glass cover [41]. The
best performance was found to have the PV system is in
direct contact with the surface and the absorber tubes,
while a stream of air from the space underneath the surface
the absorber can provide warm air. Moreover, the heat
optimization of FB / T solar air collector, placing a foil
studied experimentally [53.54] and numerically. [55].
In America, the University of Miami (University of Miami), the
Sopian researcher did his doctoral thesis on a
FB / F double pass solar air collector, who continued this
work at the University of Malaysia (Universiti Kebangsaan
Malaysia) [56]. Furthermore investigated and PV / T air collector double
Passage of low concentration.
In Egypt, Hegazy omeletitis to compare
various types of PV / T air systems did a study
an emulation program, where the efficiency of PV / T collector
double pass caught the attention.
Finally, a job peirametriki Tiwari and Sodha was over
PV / T systems with and without glass cover. The two researchers
found that the glass cover almost doubles the usable
heat and electricity dropped by 10% sto9%
4.4 TYPES YVRI_IK_N (PV / T) SYSKEF_N
Hybrid PV / T systems consist of PV panels
with integrated thermal unit of heat gain, where
circulating a working medium. Therefore these systems
distinguished according to the average worker who move and
cool the modules. So we have: PV / T water systems
and air
213
The heat dissipation in air traffic requires simpler
cheaper device, but the cooling of photovoltaic less
efficient. When the ambient air temperature is
above 20 C o the PV / T air systems have limited
features (mainly natural ventilation in buildings and heating air
some industrial and agricultural processes). The release of
air in these provisions are either natural circulation or by
convection [53]. The natural circulation is
Easiest way to remove heat from the PV panels
and thus avoid unwanted heating of the heat dissipation with a circulation of
water is more expensive
process in relation to heat dissipation to air,
considered more practical in cases where the temperature
environment is higher than 20C o, because
water temperature of the network is below 20C o schedonolo year.
214
2.1 The
Sun ............................................... .................................................. ...................
...... 13
2.2 Intensity of solar
radiation .............................................. ........................................ 14
2.3 Earth's
orbit .............................................. .................................................. ...............
14
2.4 Radiation a sun orbit the
Earth ........................................... ........................... 15
2.5 Prosptiptousa radiation on
Earth ............................................. ................................ 16
2.6 Calculation of solar radiation on inclined plane ...........................................
17
Photovoltaic Technology
3_____________________________________________ 20
3.1
GENKA ................................................ .................................................. ............
............... 20
3.2 History of the photovoltaic
cells ............................................. ........................... 20
3.3 Photovoltaic
effect ............................................... ............................................... 21
3.4
Fotorefma ................................................ .................................................. ........
.......... 22
3.5 Models photovoltaic .............................................. ............................... 23
3.6 Characteristics of photovoltaic
modules .............................................. .................. 25
3.7 Factors affecting the
performance ............................................ ........................ 26
3.8 Basic types of photovoltaic
modules ............................................. ........................ 27
3.9 modules ............................................... .................................................. .29
215
systems ............................................ ................... 32
4.3 Categories of solar
panels .............................................. ..................................... 36
4.4 Models of solar thermal
collectors ............................................. .......................... 40
4.4.1 Model steady state (steady-state model )...................................... .... 41
4.4.2 _ynamika models (Dynamic
models )......................................... .......................... 42
4.5 Storage of solar heat in tanks ............................................ ................ 43
Wind Energy
5_____________________________________________________ 45
5.1
General ................................................ .................................................. ...........
............... 45
5.2 History of wind
machines .............................................. .............................................. 45
Wind Speed 5.3 ............................................... ..................................................
.......... 46
5.3.1 Variation of wind speed with height ....................................... ......... 47
5.3.2 Effect of barriers on the flow of
wind ......................................... .................... 48
5.4 Types of wind
machines .............................................. .................................................. .49
5.5 Wind turbine
technology ............................................... .......................................... 51
5.6 Power A /
C. ............................................ .................................................. .........................
52
5.7 Small-scale wind
turbines .............................................. ................................. 54
5.7.1 _omika elements small A /
C ......................................... ....................................... 54
5.7.2 Short Blades A /
C. ......................................... .................................................. 55
5.7.3 Orientation of small A /
C. ......................................... .................................... 56
5.7.4 speed control of small A / C ........................................ ................. 56
5.7.5 Generators of small A /
C. ......................................... ............................................... 57
5.7.6 Towers support small A /
C ......................................... ...................................... 57
Experimental & PROCEDURE 6
______________________________________________ 59
6.1 The purpose of the experimental
216
procedure ............................................. ............................. 59
6.2 Circuits and
connections .............................................. ............................................... 60
6.2.1 Individual energy system with A / C. ...................................... ......... 60
6.2.2 photovoltaic system ............................................ ........................... 61
6.2.3 Solar water heating system ........................................... ............................
63
6.3 Specific parts of the
installation ............................................. ............................ 64
6.3.1 Wind
Turbine .............................................. .................................................. ..... 64
6.3.2
Photovoltaic .............................................. .................................................. ......
. 66
6.3.3 Thermal solar
collector ............................................ .................................... 68
6.3.4
Battery .............................................. .................................................. ..............
69
6.3.5 Charge
Regulator ............................................. ................................................. 70
.............................................. Converter
6.3.6 .................................................. ......... 70
6.3.7
Wind .............................................. .................................................. ............ 71
6.3.8
Pyranometro .............................................. .................................................. .....
.... 72
6.3.9
thermocouples .............................................. .................................................. ..
......... 73
6.4 Automatically download and record
measurements ............................................ ..................... 73
6.4.1 Automatic
recording ............................................. ........................................... 73
6.4.2 System
multiplexing ............................................. .............................................. 75
6.4.3 LoggerNet 3.1 Datalogger Support
Software .......................................... ........... 75
Experimental Results 7 ___________________________________________
79
7.1 Introduction ................................................ ..................................................
..................... 79
7.2 Meteorological
217
sizes ............................................... .................................................. 80
7.2.1 Ambient
Temperature ............................................. ................................... 80
7.2.2 Wind
Speed ............................................. .................................................. ... 82
7.2.3 Solar
radiation ............................................. ................................................. 83
7.2.4
Conclusions .............................................. .................................................. ......
85
7.3 Independent
Units ............................................... .................................................. ........ 85
7.3.1 Measurements of energy output and efficiency
PV ....................................... ....... 85
7.3.2 _iagrammata daily performance and power
PV ...................................... ....... 88
7.3.3 Measurements of energy output and efficiency A /
C ....................................... ....... 90
7.3.4 _iagrammata daily performance and power A /
C ....................................... ...... 94
7.3.5 Study thermosyphonic
Collector ............................................ .......................... 96
7.3.5.1 Experimental Determination of the average daily yield of
thermosyphonic
collector ................................................ ............................................ 96
7.3.5.2 Experimental determination of thermal losses
thermosyphonic
collector ................................................ ............................................ 98
7.3.5.3 _iagramma change in average daily gain and
coefficient of thermal losses thermosyphonic collector ...................... 99
7.3.5.4 Day charts operation thermosyphonic
Collector ................................................. .................................................. .........
......... 102
Combined use of A / C, photovoltaic and thermal collector 8____________
105
8.1
General ................................................ .................................................. ...........
.............. 105
8.2 Water heating using electric resistance ........................................... .........
106
8.2.1
Introduction .............................................. .................................................. .......
...... 106
8.2.2 Experimental results of heating water chrisiilektrikis
218
resistance ................................................. .................................................. .......
......... 106
8.3 Combination of A / C hybrid photovoltaic / thermal solar (PV / i
systems or PV / T
systems) ........................................... ............................................. 111
8.3.1 Daily charts yield hybrid PV / i thermosyphonic
System ................................................. .................................................. ...........
.... 114
8.4 Energy study to meet the energy needs of a house by
produced by energy systems ............................................. ....................... 116
8.4.1 energy produced by PV modules ....................................... ...................
116
8.4.2 energy produced by the A /
C. ....................................... ............................. 117
8.4.3 Generated energy from the water heater collector ....................................
118
8.4.4 Coverage of basic electricity needs in a house ........................................
118
Estimates-9 Conclusions
___________________________________________ 122
Bibliography
Annexes
A) Programme Datalogger
B) Correlation days
Thanks
This thesis was part of the Graduate Program in Applied Physics Faculty,
University of Patras, 2008-2009. I am particularly grateful to Mr John
Tripanagnostopoulos, Associate Professor, Department of Physics, to
supervise, help and useful suggestions he gave me to reach completion. I
thank Prof. Panagiotis Giannoulis and Associate Professor Athanasios
Argyriou, three members of my committee for their useful and constructive
advice throughout the course of my presence in Solar Energy Laboratory,
University of Patras. Thanks Manolis Souliotis, Researchers for their advice
and suggestions for the successful completion of this work. Also many thanks
to the candidate Dr. Panos Themelis and graduate student Panagiotis
Georgostathis for their valuable assistance and moral support throughout the
duration of my course at the Laboratory of Solar Energy. Finally, I would like to
thank the parents and my sister for moral and material support they gave me
all the years of my studies.
Summary
Renewable energy sources (RES), such as solar and wind energy can offer
alternative ways of producing energy. Every form of renewable energy has its
own characteristics and can be implemented either in large plants producing
219
electricity and thermal energy or smaller units such as buildings. Interestingly,
the combined use of these energy sources, especially to cover the electrical
and thermal demands of buildings. Purpose of this thesis is to study a system
consisting of a small wind turbine, photovoltaic panels and solar thermal
collector. Initially, reference to different RES systems that make up the
installation. Moreover, an analysis of meteorological data in the region,
followed by energy study of the behavior of hybrid
system. The main issue addressed is the provision of electricity for heating
water, where there is a surplus of electricity. Also discussed the prospect of a
combination hybrid / solar panels with A / C. Finally, the conclusions and
estimates about the behavior of the hybrid system to changes of wind speed
and solar
radiation on a daily and annual basis.
Keywords
Ananeosimes energy, solar, wind, thermal, wind, solar, solar panels, weather
data, building.
LIST SCHIMAT1N
Figure 1 Basic circuit design of hybrid circuit .................................... 6
Figure 2 Geometric representation of IT in the position of the
Sun ....................................... .15
Figure 3 Components of the total solar radiation received by a GT
body ..................... 16
Figure 4 flat surfaces inclined ....... 17 and angle of incidence ,
azimuth angle p
Figure 5 Mechanism of
photovoltaics ............................................. ......................... 21
Figure 6 Model
photovoltaics ............................................. .................................. 22
Figure 7 Characteristics of IV and IP of the photovoltaic
component ............................ 23
Figure 8 Change in the efficiency of photovoltaic cells on the basis of
Temperature ................................................. .................................................. ..
........................... 25
Figure 9 'iaforoi types of aggregate panels and the corresponding degree
concentration of solar
radiation .............................................. .......................................... 37
Figure 10 Area of turbulence around the area of individual
obstacle ................................................. ................ 48
Figure 11 Parts
turbine .............................................. ............................................... 51
Figure 12 Circuit autonomous power plant with A /
C ....................................... .. 60
Figure 13 photovoltaic
220
system ............................................. .................................... 61
Figure 14 Solar Collector
thermosifonikos ............................................. ................................ 62
Figure 15 Front and yield curve AIR-X
Land ........................................ ...................... 64
Figure 16 Hybrid PV / h water solar panels, with or without lens .....................
111
Figure 17 Hybrid PV / i thermosyphonic
system .......................................... ............................ 111
Figure 18 Combined order FB / i collector thermosifoniki normal solar
device ...... 112
LIST EIKON1N
Figure 1 Solar Integrated Device ICS (a) and water heaters system
(b) ................... 33
Figure 2 Thermal Solar Differential
Control ........................................... .............. 34
Figure 3 Flat plate
collectors ............................................. ............................................. 36
Figure 4 vacuum tube
collector ............................................. ............................................. 37
Figure 5 Hybrid PV / H solar panels and air-
water ....................................... .................. 38
Figure 6 Power curve A /
C. .......................................... .................................................. ........ 52
Figure 7 Air-X
Wind ............................................ .................................................. ....................
.. 55
Figure 8 The
wind .............................................. .................................................. .......... 63
Figure 9
modules .............................................. .................................................. .. 66
Figure 10 the water heater
system ............................................. ............................................ 67
Figure 11 Controller SCC 20
eco ............................................ .................................................. .. 69
Figure 12 Inverter AJ 275-
12 ........................................... .................................................. ......... 70
Figure 13 anemometer
A100R .............................................. .................................................. ...... 71
Figure 14 Pyranometro CM
3 ............................................. .................................................. ...... 71
Figure 15 automatic recording type
CR10X ............................................ ............................ 73
221
Figure 16 Unit Multiplexing (Multiplexer)
AM416 .......................................... ..................... 74
Figure 17 toolbar
LoggerNet ............................................ ................................... 75
LIST & IAGRAMMAT1N
Iagramma & 1 'iakymansi the average monthly ambient
temperature ............................. 80
Iagramma & 2 Maximum and minimum average daily temperature of each
month ............................. 80
Number 3 & iagramma values of wind speed at the speed ....................... 81
Iagramma & 4 'iakymansi the average monthly wind
speed ........................................ .82
Iagramma & 5 'iakymansi the average monthly solar
radiation ......................................... 83
& Iagramma 6 Change of average daily solar
radiation ........................................... .... 83
Energy & iagramma 7 curve PV modules (average
hourly) ..................................... 85
& 8 iagramma Monthly energy performance and efficiency of
PV ...................................... 86
Day 9 & iagramma energy behavior and performance of PV
with
consumption ................................................ .................................................. ....
........................ 87
Iagramma & 10 Daily energy behavior and performance of PV
without
consuming ................................................ .................................................. .......
................ 88
Energy & iagramma 11 curve A / C for a total of 269 days (average
hourly) .............. 89
12 iagramma & Performance A / C depending on the wind
speed ...................................... ...... 90
& Iagramma 13 total power output for each
month .......................................... ................. 91
& Simulation results iagramma 14 A /
C. .......................................... ................................ 92
& Simulation results iagramma 15 A /
C. .......................................... ................................ 92
Day 16 & iagramma behavior WTs moderate wind
speed ........................................ .... 93
Day 17 & iagramma conduct A / C high wind
speed ........................................ ... 94
& Iagramma 18 Average daily throughput collector
222
thermosyphonic ........................................... .99
& Change 19 iagramma night heat loss rate
the
temperature ............................................... .................................................. ......
............... 100
20 & iagramma Daily chart operation thermosyphonic collector .......................
101
21 & iagramma Daily chart operation thermosyphonic collector .......................
102
Change & iagramma 22 key parameters of the system thermosyphonic
during three days ............................................. ..................................................
103 ..
& Iagramma 23 iagramma heating water using electrical resistance
(a) ..................... 106
Iagramma & 24 'iagramma heating water using electrical resistance
(b) ..................... 108
Day 25 and iagramma mode hybrid PV / i sink without transparent
cover ........... 113
26 & iagramma Change electrical efficiency of hybrid PV / i collector with and
without
glass cover-yield hybrid PV / i thermosyphonic solar collector .........................
114
& Iagramma 27 Total monthly production of energy from PV
panels ................................ 115
& Iagramma 28 Total monthly energy production from the A / C during the
operation
of ................................................. .................................................. ....................
......................... 116
PREFACE
The collection and conversion of solar and wind energy into electricity and
Heat an alternative to the problem of saving energy from conventional
sources, contributing thus to reduce consumption of fossil resources and
environmental protection. To exploit the potential of solar and wind
technologies have been developed, the main of which are photovoltaics, solar
thermal panels and wind turbines. In this thesis the combined use of solar and
wind power to meet electrical and thermal needs of a building. For this
purpose was examined as to conduct an energy system consisting of a
photovoltaic array, a level thermosyphonic collector and a small wind turbine.
The photovoltaic panels and small wind turbine provide electricity for
consumption while the solar collector provides hot water use. Examine the
idea of heating the water in the storage tank of the solar collector by using
electric energy
where there is surplus energy produced by this
223
photovoltaic and A / C. The experimental measurements of parameters of
devices
a first step in determining the electrical and thermal
Conduct the installation base for the possible application to the building sector.
The work is divided into three parts, the first includes the bibliographic
Research on photovoltaic panels, solar water heating systems and wind
turbines, the second describes the technical specifications of plant and the
third party to present the experimental results of the tests.
The 1st Chapter is a reference to the development of renewable energy and is
a reference to the energy consumption of buildings at the European level. It
also presents the main types of hybrid renewable energy systems and a brief
background to work on those systems.
The 2nd chapter provides some basic information about solar radiation.
Refer to the components of solar radiation at the surface and calculated
theoretical prices.
The 3rd chapter includes the study of photovoltaic (PV).
Specifically, the theoretical data on semiconductors, the
photovoltaic effect, the types of photovoltaic cells, the function of a PV and
how to install PV in buildings.
Chapter 4 presents the main solar thermal heating systems
water. Refer to the types of solar collectors, while those considered
oisimantikoteres categories. It also provides some theoretical models
solar panels and analyze basic equations governing these models.
In the 5th chapter in the wind. Originally listed some
elements related to the wind potential and stisynecheia refer to
wind machines. In particular, theoretical data on the
wind energy and thermal energy as well as the types of
wind turbines of today. At the end of the chapter describes the parts of a wind
turbine with an emphasis on small wind machines.
In the 6th chapter describes the installation on which the experiments took
place. More specifically, the interconnecting circuits, devices and instruments
as well as data loggers.
The 7th Chapter presents the results of the energy produced and returns from
the individual plots of energy costs and returns for autonomous systems A / C
and PV modules as well as charts daily operation. Furthermore plots out the
average daily efficiency and thermal losses nightly rate for the heater system.
In the 8th chapter describes how the combination of solar and wind
energy to increase system performance. Specifically examines the idea of
heating water with electricity derived from solar and A / C and shows the
combined cases of the systems with hybrid photovoltaic / thermal collectors.
Also studied the degree of coverage in electrical and thermal requirements of
a house under the power produced by the system under study during the
224
period of experiments.
Finally in the 9th chapter presents the conclusions drawn from
work and presents possible future applications that can be done. A first report
on the issue which underpins this thesis has been carried out and presented at
the international conference Energy Performance and Environmental Quality
Buildings (EPEQUB) held on the island of Milos in the period 12-13 July 2007
under the title: Combined solar and wind energy systems for building
application.
EISAG1GI
1.1 Energy problem
Conventional energy sources are based on oil, coal and natural gas have
proven to be effective drivers of economic progress but also threatens the
destruction of the environment and anthropinisygeias. Torrential rain,
prolonged heat waves and fires are some of the phenomena resulting from the
high concentration of natural gas contribute to the "greenhouse effect". The
change of climate warming as a consequence of uncontrolled use of energy
resources is expected to be important, since the scientific community
estimates foresee an increase in average global temperature of up to 3.5 ° C
by 2100. Europe contributed 14% of total annual emissions of CO2 and Asia
by 25% and North America 29%. Emissions of CO2, the preferred gas
responsible for global warming (80%) from the broader energy OME (primary
production). The consumption of fossil fuels and especially
Oil contributes 50% to the total annual CO2 emissions in the EU The
electricity and steam accounts for 30% of CO2 emissions and
Chapter 1
The residential sector involved with the rate reaches 14%. Similarly, the
involvement
the energy sector in the emissions of other greenhouse gases
as CH4 and N2O are relatively small with 17% and 7% respectively.
The conference in Rio in the summer of 1992, identified the problem
planning direct actions and interventions. The main objective was
effort to maintain pollution levels by 2000 to those in 1990.
Although these workarounds and monitoring their implementation and found
comply with all governments. At the next conference in Kiato Japan in 1997
was an attempt for a new agreement, based on more drastic measures, but
never been unanimous.
1.2 Renewable Energy
The environmental impacts of mineral resources but also and
increasing demand for electricity have led the scientific community in
find other energy solutions, with special direction to the sector
renewable energy sources (RES). The potential of renewable energy are
important
since they can serve part of the global demand for electricity and reduce
225
conventional energy sources to provide heat, mechanical work or other energy
forms. Renewable sources such as biomass, wind, solar, hydro and
geothermal power can provide electricity utilizing the available natural
resources. The transition to energy systems based on renewable sources, it
seems increasingly likely, as the cost of these systems is reduced significantly
over time as opposed to the price of oil in recent years shows an increase.
Made it clear that the future development of energy sector based largely on
renewable sources and to a lesser extent gas, oil and coal.
1.3 Building Environment and Energy Consumption
The building sector is one of the major areas of consumption
energy and daily global primary consumption exceeding 7 million barrels, an
amount equal to the total production of
OPEC countries. In EU countries, the sector absorbs the buildings in average,
40% of total energy consumption. The country oscillation varies from 20% in
Portugal to 45% for Ireland and Greece stands at 30%. 2edomenou that
residents of urban centers in particular is experiencing 80% of his life inside
buildings are an obvious influence quality esoterikouklimatos both comfort
level and productivity level. Specifically, increasing ambient temperature and
the widespread use of electrical appliances in large urban centers have
contributed to a sharp increase in energy requirement in many cases is almost
double that required in non-urban areas.
In the European Union, the building sector (households and tertiary sector)
represents the greatest area of energy consumption by 40%. The final
consumption of buildings is around 350 Mtoe (1 Mtoe: metric ton
oil equivalent) per year. Most of the energy
buildings covered by gas with a quantity of 116 Mtoe, oil by 99 Mtoe, followed
by electricity and solid fuels by 91 and 11 Mtoe
respectively. Based on the above that accounted for about 1 Mtoe per year
per capita to meet the energy needs of buildings in Europe
The annual energy consumption of buildings in Greece are around 4.6
Mtoe and account for about 0.55 Mtoe per capita per year, the quantity
half of the corresponding consumption in Europe. The need for heating
dwellings account for 70% of total consumption and energy consumption for
household appliances, lighting and air conditioning accounts for 18% of the
total energy balance.
1.4 Incorporation of RES in buildings
The implementation of an integrated energy planning and integration
energy-efficient technologies in buildings is a prerequisite for full
exploiting the energy potential of each building in each location. The maximum
229
Buckeridge (2000) presented a theoretical study of the desired hybrid system
with two or more renewable energy sources which show excellent stability.
Also Khan and Iqbal (2005) published a survey on the design and analysis of
hybrid system for a residential complex. The two researchers collected wind
speed data, solar radiation and consumption for a year, which was used to
study the hybrid system. Important role in the efficient operation of a hybrid
system is the size of the units making up the system. In this area, many
researchers have proposed various methods for the purification capacity of
each subsystem. The Rahman and Chehid (1996) presented the design of a
hybrid system of PV / WT for both stand alone applications and applications
connected to the mains. These proposed a technique that was designed to
reduce the cost of electricity, covering the required energy needs, taking into
account environmental factors in the design. Also Markvart (1998) described a
procedure for determining the size of photovoltaic and wind machine for a
hybrid PV / WT. Specifically, using solar and wind data in a specific region,
showed graphic correlation of the $ photovoltaic and wind system defining thus
the optimal combination of these systems to meet the energy needs. The
Elhadidy and Shaahid (1999 2004v) through a series of operations calculated
the optimal capacity of the batteries require a hybrid system for studying the
influence of changing the battery in energy production. Also Yang (2007)
developed a new model based on
which determines the size of a hybrid system of PV / WT which is based
Studying the required capacity of the batteries in an autonomous system.
To optimize a hybrid system of PV / WT developed
many computational techniques using linear and dynamic
programming, probabilistic approaches and iterative process. The Katti
and Khedkar (2007) developed an algorithm using mean values ories
wind speed, solar radiation and consumption in order to
efficient design of a system PV / WT. Along the same lines as
Koutroulis et al. (2006) published a paper, which is developing a methodology
the optimal design of a hybrid system of PV / WT using
genetic algorithms with application to housing. Moreover Shahirinial et al.
(2006)
compare results of two optimization techniques based on algorithms and
presented a method based on the probability of load loss (Loss of load
probability-LOLP) takes into account the cost of individual systems and the
level of autonomy.
The idea to develop hybrid systems that utilize wind
energy, while solar heating (Hybrid Thermal / WT systems) was
be utilized in the late 70s. The Manwell and McGowan (1981)
developed a theoretical model for predicting the monthly return on a
hot water heating system using a wind machine. They showed that excess
electricity from wind machine could be exploited by feeding a resistance to
heat water for use in a water storage tank. In the same vein, the Bell and
230
McGowan (1984) showed a techno-economic analysis for a system in a house
with
vertical axis wind turbine combined with a storage tank water
to cover both the energy needs of appliances and
produce hot water. Showed that the installation of such systems in areas with
high wind potential can cover a significant proportion of the energy
requirements of a house.
The Darkazalli and McGowan (1978) published the results presented
a hybrid system comprising a wind turbine, solar thermal
collector and a storage tank of hot water. Specifically studied the
system behavior as its parameters the diameter of
wind, and the area of the solar thermal panel. The Twidell et al. (1990)
published the results from the construction and design of a hybrid
system that uses wind and solar energy for space heating a dwelling in an
insular community. More specifically, a wind turbine and an array of solar
panels installed to eventually heat the
required quantity of water for heating houses. The Kilkis (1999
presented an integrated heating-ventilation-air conditioning (HVAC) in
combined with wind and geothermal heat pump (GSHP). The
HVAC system endeavored to achieve the appropriate climatic conditions within
residence while the wind fed the geothermal heat pump to produce hot water.
The study of this hybrid system showed that it could be a viable option for
areas with high wind potential, especially in locations with a Mediterranean
climate and the required electrical needs between winter and summer are
almost the same. The Y. Tripanagnostopoulos and S. Tselepis (2003)
published a work in which
combines a wind turbine, PV frames and hybrid photovoltaic panels to
to increase overall system performance. Showed a parallel study on the cost
of these systems. The Liliana Licea-Jimenez Sergio A. Perez-Garcia et al
(2004) presented a theoretical and experimental analysis for hybrid systems
consisting of different combinations or heat collector, solar and wind.
Furthermore applied these hybrid systems in a rural home. The Sateikis et al.
(2006) presented a study related to the implementation of a hybrid system with
wind and thermal solar panels on a house in a rural area of Lithuania. The
purpose of this study was to cover a percentage of the heat needs with the use
of the system by making the assumption that heating 1m2 required 0.25m2
area solar panels and wind turbine diameter of 0.40m. The results showed that
the percentage cover thermal needs may reach 55%, which is an important
step towards further development. The Y. Tripanagnostopoulos and M.
Souliotis (2008) presented a study on the combination of small wind turbines
and solar thermal collectors, for possible application in buildings.
Simultaneously, the combination of these systems with photovoltaic panels.
231
Conclusion from the literature study in hybrid systems, PV / WT
and Thermal / WT was observed how the investigation led to the development
of new techniques designed to achieve better performance of hybrid systems
with
while reducing system losses.
SOLAR RADIATION
2.1 The Sun
The sun is a typical star of mass 2 x 1030 Kg, with a diameter of 1.39 x 109 m
and
aged approximately 5 x 109 years. The surface temperature of the sun is
about
5800 K and the temperature inside is estimated to be 15,000,000 K. The
temperature resulting from the conversion of hydrogen to helium through
Reaction 1 4
⊕ + e ∩ → ∩1 2 4 . 〈 ∑ 〉 emphasis It has been estimated that
for every gram
Hydrogen is converted to helium produced energy equal to U = 1.67 x 105
kWh. The
generated energy is transferred to the surface and then diffused into the
space in the form of electromagnetic radiation.
If one studies the spectrum of solar radiation will be noticed that
extends over all wavelengths. Specifically, the spectrum of solar radiation
can be divided into three parts: the UV spectrum (l <380nm), the visible
spectrum (380 nm <l <700 nm) and infrared spectrum (lambda> 780 nm).
Apart from electromagnetic radiation the sun emits a weak particle radiation
consists of charged particles, mainly protons and electrons, called solar wind.
Chapter 2
2.2 Intensity of solar radiation
The amount of energy received by a surface is directly dependent on the
intensity of
solar radiation. B The intensity of solar radiation is defined as the amount of
solar energy incident on 1 m2 surface in 1 sec ..
The radiated sunlight away radially from the sun to
time and varies inversely with the square of
The intensity of solar radiation is reduced before it reaches the surface of
Earth. The amount of reduction depends on many factors. The
important ones are the location and altitude of a place and
composition of the atmosphere at any time and significantly affect the
phenomenon of
absorption which reduces the intensity of radiation.
2.3 Orbit of Earth
A very important factor taken into account when drawing
solar system is the tilt and azimuth angle of the surface
232
Installation on the apparent movement of the sun as they relate to the strength
of solar radiation received by the point at which the facility is located.
The Earth orbits the sun along with a very elliptical orbit
small eccentricity, making one complete revolution every 365.25 days. The
point on the Earth's orbit closest to the sun at a distance of about 147
million kilometers, and is called the perihelion on January 2.
Unlike the point in its orbit where the earth is the greatest distance
about 152 million kilometers, and is called aphelion on July 3.
where d (km) is the distance of Earth from the sun, and n is the number of
days to January 1 correspond to n = 1 and 31 2ekemvriou correspond to n =
365.
2.4 Radiation a Sun
The effects of radiation and its final form than more
factors determined by the position of the sun in the sky. This is due to
different path that the radiation within the Earth's atmosphere
thus the air mass through which it passes.
The length of the path of radiation than sea level
characterized by scale air mass AM (air mass). The measure of air mass
associated with the zenith angle i and is defined as the ratio of the distance
traveled by the
radiation than sea level by random position of the Sun to
distance traveled by radiation if the sun was at its peak (Figure 2).
5s AM1 defined the position of the Sun corresponding to the minimum path
length
solar radiation in the atmosphere. Similarly AM1.5 is path
radiation with the sun at an angle of 450 from the zenith, on the corner of AM2
Sun equal to 600, etc. The maximum that can accept a surface
positioned on top of the atmosphere is perpendicular to the rays 1350 W/m2.
The
AM1.5 solar radiation intensity is 935 W/m2 and is equal to the average
maximum power
can not accept a body on Earth. Conventional price is
designated as a radiant sun and is the basis for comparison of radiation
accept a body.
Figure 2 Geometric representation of IT in the position of the Sun: (a)
theoretical.
(B) actual
2.5 Incident radiation on Earth
When sunlight penetrates the layer of Earth's atmosphere receives
the influence of several factors. Some of them, such as clouds reflect solar
radiation, while others, such as ozone, oxygen absorbing a part of it. Also
water droplets or dust in the atmosphere leading to the spread of radiation that
reaches the ground where a part of another absorbed and reflected. The
233
Complete TG solar radiation received by a body on the surface consists of
three components (Figure 3):
Direct radiation (direct radiation) b G: the radiation that comes
directly from the solar disk.
2iachyti radiation (diffuse radiation) diff G: The radiation from
reflections from the sky.
reflected radiation (albedo radiation) r G: the radiation
reflections from the ground
Figure 3 Components of the total solar radiation received by a TG
body on the surface
2.6 Calculation of solar radiation on inclined plane
The position of the sun in relation to an inclined plane can be described
using different angles (Figure 4). The angle of prolapse, i
, direct
radiation at the surface is the angle between the vector position of the sun
and nd surface. This angle can be calculated by the following formula:
i ) cos cos sin sin cos cos ( (4) - + = HH
sp
where the angle of the is surface with the horizontal plane, p
is azimouthiagonia level, s the azimuth angle of the sun given by
is the angle South and H between the sun from the horizontal plane
(Figure 4).
Figure 4 flat surfaces inclined and angle , azimuth angle p
Sunlight G incidence receives a ramp on the surface as mentioned
above consists of three components. The direct radiation received by a level
depends on the angle of prolapse of solar radiation and diffuse and reflected
radiation received by the level does not depend on the orientation of the plane
to the sun only on the part of Heaven which "sees" the plane. For this reason it
is necessary to calculate the weightings for each component separately.
The calculation of the diffuse component of radiation based on the assumption
FOTOVOLTAIKI TECHNOLOGY
234
3.1 General
The solar cells are the major components of photovoltaic
frameworks (PV modules) to convert solar energy into electricity. Data
These are semiconductor diodes typically in the form of disk, which, when
accepting the
epiifaneia the sun, have a potential difference. The output
voltage ranges from 0.5 V to 1V, while the current density is between 20 and
40
mA/cm2 according to the material and the intensity of incident
radiation.
3.2 History of the photovoltaic cells
The technology of photovoltaic cells was largely developed after
mid-twentieth century, although the photovoltaic effect was observed by
Edmond Becquerel in 1839. The first report on the photovoltaic effect was
published in 1877 by two researchers at the University of Cambridge and the
Adams Days, and in 1883 built a photovoltaic element selenium similar to
silicon solar cells with a yield of less than 1%. Later, Chapin,
Chapter 3
Fuller and Pearson in 1954 built the first solar module pn junction with
yield 6%. In 1956 he marketed the first commercial modules at a cost of 1000
$ / Wp, made from crystalline silicon and return between 5-10%. Today, the
yield of crystalline photovoltaic cells has reached 25% for space applications
and those intended for Surface industrial and residential uses do not exceed
16%.
3.3 Photovoltaic effect
The solar cells as reported previously made from semiconductor materials
which can be monocrystalline, polykrystallka or even amorphous. Regardless
of the crystal structure, all solar cells containing a semiconductor diode that
spans the entire width of the element. Usually the path is created by contacting
a layer of type-n in a layer-p, or by contact between a semiconductor and a
targeted metal (diode Schottky). The operation of photovoltaic cells based on
the electrostatic potential barrier in the material receiving the radiation. Each
photon of incident radiation with energy equal to or greater than the energy
gap of the semiconductor has the ability to absorb a chemical bond and
release a pair of actors (one electron in the conduction band
and a hole in the valence band). From the resulting pairs of players, those that
are found in association pn accept the force of the electrostatic field of the
diode to reduce the dynamic power. This has meant that the movement of
electrons to the contact type-n and the hole in the contact type-p, creating a
potential difference between terminals of passage (Figure 5). The above
device behaves properly polarized diode as a source
electricity for as long as receiving the radiation. The process of creating a
235
potential difference of views in a component called a photovoltaic solar
phenomenon.
Figure 5 Mechanism of photovoltaics
3.4 Fotorefma
As mentioned above, the incidence of solar radiation on the surface
of photovoltaic cells causes stimulation resulting in the production
electricity. 5stoso, photovoltaic cells do not convert all
solar energy into electricity. Part of the radiation reflected from the
epifaneiatou solar and diffused to the environment, while the rest are absorbed
certain wavelengths. Photons the energy is less than the energy gap of the
semiconductor lost in the form of heat loss from the back of the item, while the
photons whose energy is greater than the energy gap of the semiconductor
material absorbed by the factor electricity.
3.5 Models of photovoltaic modules
The best-known model used to simulate the way
operation of a photovoltaic element, the model contains a diode and
shown in the figure below:
Figure 6 Model photovoltaics
The most important element of the above circuit is an ideal source
current volume, whose fotorefma ⊇ph I is proportional to the rate of solar
radiation.This idanikotitas passage, is the absolute temperature and e the
charge is the constant of Boltzmann, of the electron.
The parallel resistance of p R is the loss of solar cells,
while the series resistance of s R is the additional loss of the photovoltaic
point where a link to this load.
data
In the typical I-V curve is a point (,) mm VI in which the power
takes its maximum value (Figure 7). This point is called peak
power (maximum power point, MPP). The peak power of photovoltaic cells
given by:
I V (14) =m m m P
IV = The maximum power mmm P given by the manufacturers measured
under specific
steady (Standard Test Condition, STC), which correspond to
radiation 1000 W/m2, price airmass AM = 1.5 and temperature 25 oC.
Another feature size of the photovoltaic cells is
filling factor FF (fill factor). This factor is given by the ratio of
areas of the maximum rectangle that can be placed on the typical
curve I-V, to the area of the rectangle defined by the values and oc V
sc I (Figure 7) ..
3.7 Factors affecting performance
The coefficient of performance of photovoltaic cells is not constant but
influenced by many factors. One major factor is the creation of solar radiation.
236
In particular, two beams of radiation in the same power but different
wavelength drive a point in a different solar power generation. This difference
is mainly due to the appropriateness of photons over the energy gap of
semiconductor photovoltaic cells.
Another factor that strongly affects performance is the
temperature of the photovoltaic element. As shown by relation (16) trend
open circuit depends on various parameters of semiconductor, such as
energy gap and collecting the bodies. Increasing temperatures cause a
corresponding increase in the endogenous concentration of institutions so that
more reunions bodies, resulting in a decrease in conversion efficiency.
Figure 8 Change in the efficiency of photovoltaic cells on the basis of
temperature
3.8 Basic types of photovoltaic modules
The PV solar cells are constructed in many ways
but with different materials. Depending on the manufacturing technology, their
solar cells can be divided into two different groups. The first
group, which is commonly used in household, use the
thick film technology while the second group uses technology thin film. The
material predominantly used today for the manufacture of photovoltaic
information industry is silicon (Si). But solar cells
constructed by combining other materials such as cadmium sulphide (CdS),
arsenious gallium (GaAs), telourioucho cadmium (CdTe) and copper-indium-
selenium
(CuInSe2), copper-France-diseliniou (CuGaSe2), copper-indium-sulfur
(CuInS2) and others.
Below are the major types of photovoltaic cells.
1. Monocrystalline silicon (Single-Crystalline Silicon, Sc-Si)
The basic material of these is the photovoltaic
monocrystalline silicon. The thickness of these materials is relatively large,
approximately 300mm. The efficiency of photovoltaic monocrystalline silicon
in the form of frameworks ranging from 13-18% and characterized by
high construction costs.
2. Polycrystalline silicon (Multi-crystalline Silicon, mc-Si)
The manufacture of photovoltaic polycrystalline silicon is faster
and less costly than that of PV
monocrystalline silicon. These elements are cut into square
form consists of thin layers of thickness 10 to 50 micrometers. Generally
the greater the size of single crystal regions
polycrystalline PV performance is the higher. The
Photovoltaic this sort of performance from 10 to 14% in the
form framework.
237
3. Silicon film (Ribbon Silicon)
The film PV silicon film is made of fused
crystalline silicon. The thickness is about 3mm and performance
reaches 13%. Although the construction of these elements offers
50% reduction in the use of silicon, the manufacturing cost is very
high.
4. Amorphous silicon (Amorphous Silicon, a-Si)
Photovoltaic this type have lower yields than the
previous articles. It _________gia foil coating thickness
usually 10-4mm which is produced by depositing silicon on
a substrate of glass or aluminum thickness 1-3 mm. Performance
amorphous silicon photovoltaic ranging from 6-8% while in the lab
environment achieved higher yields reach 15%.
5. Photovoltaic thin layer (Thin Film
Photovoltaic)
In this category other than PV silicon thin layer information,
owned and FB parts made of other materials. The
important materials for PV is the union of these Cu2S/CdS, the
2iselinoindiouchos Copper (CuInSe2 or CIS), the Telourioucho cadmium
(CdTe)
and Gallium Arsenic (GaAs). The performance of the above
ranging from 10 to 25% and significant advantages
compared with silicon.
3.9 modules
The model of photovoltaic (PV modules) is similar to
model of a photovoltaic element, except that the parameters are
adapted to the number of photovoltaic cells that make up.
More specifically, what determines the parameters of the photovoltaic
generator
is the number of parallel and serial photovoltaic cells.
The form of the characteristic curve of the frame is not different from the shape
() (b)
Figure 3 Flat plate collectors: (a) air and (b) wet
Vacuum tube collectors (Evacuated tube collectors)
The panels are composed of an articulated system pipes in the center
which is an absorbent surface in thermal contact with thin metal
conductor (Figure 4). Inside the tube is a vacuum created by reducing a large
degree heat losses of the collector. In such panels, the thermal operator
exhaust heat generated in the suction surface is either water or liquid phase
change as alcohol. The same category includes the vacuum tube collectors
using reflectors to concentrate solar radiation and the vacuum panels double
outer tube for better heat protection.
242
Figure 4 vacuum tube collector
Aggregated solar collectors (Concentrating solar collectors)
The aggregated solar collectors are used in applications requiring
higher temperatures than those achieved with standard flat panels. The panels
are classified as aggregated to the ratio of concentration is achieved, the type
of reflector used and the type of target achieved (for example a point or linear).
The figure below shows the main types of centralized solar panels.
Figure 9 'iaforoi types of aggregate panels and the corresponding degree
concentration of solar radiation
Hybrid photovoltaic / thermal solar panels (Photovoltaic / Thermal Solar
Collectors, PV / T solar collectors)
The hybrid photovoltaic / thermal solar collectors (Fig. 5) are
ability to provide both electricity and thermal energy. Hybrid PV / i
systems consist of PV panels behind which there
integrated thermal unit of heat gain which circulates the fluid. The
panels are divided in hybrid PV / i collectors of water and hybrid PV / i
air collectors, depending on the fluid using heat gain. The
these systems exploit the heat due to losses of photovoltaic modules due to
the limited conversion of sunlight into electricity, increasing thus the overall
system performance. Figure 5 Hybrid PV / T solar collectors, water and air
respectively
4.4 Models of solar thermal collectors
The efficiency of the solar collector depends on a number of technical and
operational
characteristics for proper modeling of the overall operation of the heat
solar collectors. All models have been developed fall into two broad
categories, depending on how close the operation panel. These models are:
Model steady state (steady-state model): This model
briefly describes the behavior of a collector at steady
situation, ie where there is significant variation
both in meteorological terms (radiation, temperature)
and in some functional characteristics of collector (supply and
fluid inlet temperature).
2ynamika models (dynamic models): The dynamic modeling approach to
instantaneous behavior of the panel, considering the transitional
apparently due to the heat capacity of component
material of a thermal solar system. In the category of dynamic
models and models under 'quasi' which take into account
some of the elements of a system thermochoritika.
The main difference between the two models lies in the consequences of
behavior
collector from the weather changes especially in conditions of actual operation.
243
When the total heat capacity of sub-systems is significantly higher
than the collector (most common case) the steady-state model
closely approximates the operation of the system. But when
is for systems with heat capacity comparable to that of the collector, the
dynamic model is that it is more efficient
4.4.1 Model steady state (Steady-state model)
.
According to the above relation in steady state, the useful
energy absorbed by the collector is a function of incident solar radiation
whereas the optical and thermal losses of the system. The optical losses of the
〈 collector expressed by the active product of permeability-absorption () eff
and heat losses are expressed by the rate of heat loss LU.
255
6.3.5 Charge Regulator
For the connection of PV to the battery used in a controller
charger (controller) to determine the output voltage to 12 V and the
check the battery charge. The model used (Figure 11) is the
company Conergy codenamed SCC 20 eco.
This device allows the passage of a maximum current 20 A for a system
12 V / 24 V according to a predetermined voltage storage element and having
minimum consumption of no more than 4 mA. There is also an electronic
system
protection cut off the battery when the voltage exceeds the 13.5 V.
Figure 11 Controller SCC 20 eco
Converter 6.3.6
The converter (inverter) is an electronic device that converts the voltage
Battery 12 V DC to 220 V AC, to implement a common electrical
devices. For the purposes of the study, two converters for each system
separately. Both the circuit includes A / C and for that includes modules
chrisimopoiithikandyo sine wave inverters company STUDER codenamed AJ
257-400 (Figure 12) rated 275 Watt. This model is designed for appliances
that operate on household electricity of 230 V / 50Hz with an efficiency of over
93%. Also, the converter has a visual and audible buzzer if abnormal operation
such as low battery voltage of the battery, overheating, etc. Figure 12 Inverter
AJ 275-12
6.3.7 Wind
For the measurement of wind speed anemometers used two types
UEFA company's North Wales codenamed A100R (Figure 13). The
anemometer was calibrated and record the wind speed was a direct
conversion frequency electrical pulses in wind speed using appropriate
conversion factor (lan = 0.79). This model is
Made of stainless steel and composite plastic capable of operating in various
weather conditions. The A100R is possible to measure wind speed up to 75
m / sec in a temperature range from -30 oC to +70 oC and 1% accuracy for
wind speeds between 10 m / sec - 55 m / sec and 2% for wind speeds greater
than 55 m / sec.
'
Figure 13 anemometer A100R
6.3.8 Pyranometro
The pyranometro used to measure the total radiation is
The company Kipp & Zonen codenamed CM 3 (Figure 14). Recording
intensity of solar radiation was converted to voltage output units pyranometrou
solar irradiance (Wm-2) through an appropriate rate (lpyr = 94.37). The
thermal detector model CM 3 is able to measure levels of total solar radiation
up to 4000 W/m2 with an error of about ± 15 W/m2 with a response time less
than 18 sec. It is also able to function well in a wide range of temperatures (-10
256
oC to +80 oC) and with stability better than 1% per year.
Figure 14 Pyranometro CM 3
6.3.9 thermocouples
For temperature measurement thermocouples used copper-
konstantanis (CuNi-type T) are associated with the recording system. The
T type thermocouples are able to measure temperatures of -185 oC to +300
oC to within ± 0.5 oC between -40 oC - 125 oC and ± 0.004 oC x T inter
+125 OC - +300 oC T where the value of reading the temperature of the body.
6.4 Automatically download and record measurements
6.4.1 Automatic recording
For registration and storage of measurements of various parameters
used an automatic recording (data logger) Campbell Scientific company
Instrument under the trade name CR 10X (Figure 15). This model has 12
analog inputs (differential or 6) with resolution 13 bit, two pulse inputs, three
sensor excitation outputs (for sensors requiring a tendency to produce signal)
ports and eight digital I / O. It also has real time clock with an accuracy of
about ± 1-2 minutes per month.
The CR 10X can be programmed to measure both meteorological
parameters as electronic parameters with periods from tenths of seconds up to
several hours. Additionally, the data logger has the ability to perform functions
incorporate statistical analysis of the measurements are averages of any such
period, average hourly values, standard deviations, etc. Apart from
measurements of the sensors the logger stores the values of five additional
parameters. These are the code separation price, the code name system, the
year the Julian date and time. Figure 15 automatic recording type CR10X
The memory type is CR 10X EEPROM for the operating system and SRAM
for storing data. The automatic recorder has an internal memory of 128 KB
SRAM and 128 KB FLASH CR 10X (EEPROM) with an option to FLASH
memory units with capacities of 2 MB 4 MB 16 MB. In the event of power the
EEPROM and SRAM memories do not lose the stored values and derive the
energy required by an independent Lithium battery, which has a shelf life of
four years.
The CR 10X supports all forms of communication including
satellite link and the link through radio network. The most common method of
communication is the connection to a computer through the RS 232 interface
and the interface SC929 Campbell Scientific.
6.4.2 System multiplexing
In CR 10X is possible to connect various input expansion cards. One of them
is the unit multiplexing (Multiplexer) which enables making more proportional
(or differential) measurements from a limited number of CR 10X. The model
used is the company's AM416 Campbell Scientific.
Figure 16 Unit Multiplexing (Multiplexer) AM416
The AM416 is placed in an aluminum housing giakali abduction
257
heat and has 4 rows with 16 host ports on each. This model can measure
analog 32 (or 16 differential) external signals and is one of the seats available
for measuring differential automatic recorder.
6.4.3 LoggerNet 3.1 Datalogger Support Software
A) Software Support
Communicating with the automatic CR 10X recording made with a
program LoggerNet 3.1. The LoggerNet is a software package through which
Users have the ability to organize, develop and recover
data from a network of automatic recording company Campbell Scientific.
The program was designed based on an updated architecture,''user-
Server''(client-server). O server works in the background ensuring that the
datalogger communication with individual system components. Also, it is
responsible for data storage and retrieval from memory CR 10X when
required. Also, the software is designed so that some applications can run on
any computer which is connected to the main computer networks that support
the protocol TCP / IP. Such networks are 2iktya Local Computer (LAN), the
2iktya Wide Area (WAN) and Internet
B) Toolbar
When LoggerNet software installed on your main computer appears
main toolbar (Figure 17) through which is the organization and execution of
applications.
Figure 17 LoggerNet toolbar
The toolbar consists of 10 cards relating to
programming the CR10X, communication with the computer, collecting
data etc. Specifically, the tabs are:
1. EZSetup: The EZSetup is the first application that runs when the
LoggerNet software running for the first time. It is designed in such a way
so the user with successive steps can create a simple
network by automatically recording. This process includes
arrangements relate to each other by the type of record
be used to link the port with the main computer
speed data transfer and fixing the point
storage of data.
2. Setup: In this tab the user has the ability to define
parametroupou the details needed to run
the CR10X. In addition to basic connection and communication
this tab can be set to the time of the automatic recorder, the
way communication system with the user to send the program
the CR10X etc.
3. Connect: This tab is the most important parts of the software
package LoggerNet 3.1. Provides the ability to connect the datalogger to
Get with the program. It also provides tools through
programs are transferred to the memory of the recorder, adjust the
258
hours of recording, data are collected and monitored
connect the datalogger to a terminal box. It is also possible that both
price monitoring measurements and the graphical
representation in real time.
4. Status: This tab contains tools useful for representing
statistics relating to communications between the recorder
and users at all levels. It also provides a virtual representation of
devices are connected to the network claiming errors
communication while suggesting ways to correct them.
5. Edlog: This application is used for writing program
that determines the kind of measurements, the positions of
sensors in the automatic recorder, the period of
measurements and the time integration of data. The above
process occurs through an editor in conjunction with embedded
commands available to the program each time changing the parameters of
commands. The Edlog used for writing programs in the models
CR7, CR500, CR510, CR10, CR10X, CR21X and CR23X.
6. Short Cut: This tab creates programs for the dataloggers
Campbell Scientific company in four simple steps. Tool Short Cut
is mainly aimed at users who need simple programs and
simultaneously without having much experience in programming.
7. CRBasic: The CRBasic is an application for writing programs for
Recorders CR5000, CR1000, CR9000, and CR200. Aimed at users
with extensive experience in writing programs that require flexibility and
control the operation of the datalogger. For the preparation of the required
knowledge
SCWIN programming language based on language
Programming Visual BASIC.
8. View-Split: The View and Split are two tools for analyzing data.
Specifically, the tool View enables the user to see
aggregated data and the graphical representation. The
View can handle different types of data files (. DAT,. PRN,
. CSV) files like CSI (. DLD,. CSI,. PTI,. FSL,. CR2,. CR5,. CR1,. CR9).
The Split is a complementary tool to View and used in
analysis of data collected. Can produce statistically
perform relatively complex calculations and create
reports''filtering''data in accordance with the time and conditions
experiments.
9. RTCM (Real-Time Monitor and Control): This tool allows RTCM
creating graphics in real time as the datalogger
collect the data.
EXPERIMENTAL RESULTS
7.1 Introduction
259
In this chapter we present the results of measurements
during the period 12/09/2007 and 30/09/2008. Such as
mentioned in the previous chapter, measurements were made using the
automatic
CR10X data logger and include price trends, currents, temperature, speed
wind and solar radiation intensity. The minimum period for measuring
automatic recorder was set at twenty seconds yielding average values every
ten minutes. The measurements are presented on average hourly and monthly
rates depending on the case.
By means of these measurements were made calculations and graphs
associated with the operation and efficiency of both autonomous entities
making up the plant and the hybrid system. We present
graphs showing the variation of basic meteorological quantities from
which depends on the operation of the facility.
Kefalaio7
8.2.2 Experimental results of heating water using electricity
resistance
The study on the conversion of surplus electricity to
thermal tests were performed using electrical resistance to the
calculate the amount of energy required to raise the average
water temperature in the tank 2T (° C). For the purpose of the experiment
placed in the middle of the reservoir thermosyphonic manifold vacuum
resistance, power 3 kW. The peiramatikidiadikasia consisted of two each time
stages of heating different average water temperatures and a period
peace between them.
Graph 23 shows the change in water temperature at different
parts of the vessel in three different time periods. In areas where
measured the water temperature corresponding to the bottom, the middle and
upper
within the container. Originally put into service the electrical resistance for a
time
within 1 hour (time 10:00-11:00) for the region defined
from points AB (Figure 23), then the system was allowed to settle for a
within 1 hour (11:00-12:00 time-zone B-C) and then entered into
up again the resistivity again for a period of 1 hours (12:00-13:00 -
Area C-D).
0
10
20
30
40
50
60
260
70
80
90
100
9:00
9:50
10:40
11:30
12:20
13:10
14:00
14:50
15:40
16:30
17:20
18:10
19:00
19:50
20:40
21:30
22:20
23:10
0:00
Time (Hours)
Temperature (° C)
TANK Low TANK Middle TANK Up Ta TANK Mean
A B
C D
E
F
G
'Iagramma 23 iagramma heating water using electrical resistance (a)
In the first stage of the initial average temperature of water (
A) was 27.62o
while the = i Mean TC - maximum final average temperature after the first
period
heating value reached 47.67o
(point E) = f Mean TC - increased by
1 20.05 oC. = T Α Then during the period of calm (region B-C) system
The average water temperature showed a slight rise of
1.34oC taking the final= T Α price 49.01o
(Section F). = r Mean T C - In this
long as the temperatures corresponding to the middle and upper container
261
a decline, which exisorropithike by warming water
small portion of the container. The third phase of the process begun with the
average temperature
of water is 49.01o
(Section F) = r Mean TC - leading to get price
71.73o
C (Section G) shortly = Tf after the end of the heat reflecting an increase
22.72oC. = T Α at 2
After stopping the electrical resistance temperatures
water in the middle and upper container following a downward trend while
The water temperature in the lower end continues to grow. The behavior of
temperature in the low part of the receptacle is thermal inertia of the system
the change in temperature. The change in temperature can
synechizetaimechri
a thermal equilibrium in which the three temperatures are equalized. The
energy spent during the first stage of the procedure for lifting the
Α average water temperature at 1 20.05oC, was 3 kWh while the same
quantity =T
energy spent in the third phase of the experiment to raise the average
= T Α water temperature at 2 22.72oC. The fluctuation in temperatures
system during the three phases of the experiment are shown in Table 1.
Home
temperature
Change _T
(1 phase)
Change _T
(2 stage)
Change _T
(3 phase)
Final
temperature
TTANK-Low 27.70 +0.92 +2.81 +5.19 37.94
TTANK-Middle 27.66 +22.22 -1.26 +32.42 82.10
TTANK-Up 27.50 +37.02 -1.33 +27.17 91.90
TTANK-Mean 27.62 +20.05 +1.34 +22.72 71.73
Table 1 Temperature changes in the water container (s)
Similar to the previous experiment carried out with different but
heating time (Figure 24). This time, the electrical resistance was
operated for a period of 15 minutes (19:25-19:40 time-area
A-B), then the system was left to stand for a period of 45 minutes (time
19:40-20:25 long-range B-C) and then came up again the electrical
Resistance again for a period of 15 minutes (20:25-20:40 time-area
C-D).
262
0
5
10
15
20
25
30
35
40
45
50
55
60
19:19
19:39
19:59
20:19
20:39
20:59
21:19
21:39
21:59
22:19
22:39
22:59
23:19
23:39
23:59
0:19
0:39
0:59
1:19
Time (Hours)
Temperature (° C)
TANK Low TANK Middle TANK Up TANK Mean Ta
A B C D
E
F
G
'Iagramma 24' iagramma heating water using electrical resistance (b)
In the first stage of the initial average temperature of water (
A) was 30.21o
while the = i Mean TC - maximum final average temperature after the first
263
period
heating value reached 35.79o
(point E) = f Mean TC - increased by
Α 1 5.58 oC. = T Then during the period of calm Α (region B-C) system, the
average water temperature showed a slight decrease of 0.07 oC after final
price 35.72o =T
(Section F). = r Mean T C - The third phase of the process
began with an average temperature of water is 35.72o
(Section F) = r Mean T C -
ending to get the price 41.73o
C (Section G) shortly = Tf after the end of
heat reflecting an increase of 2 6.01oC. = T Α The electrical resistance of 3
kW has worked in both phases for a period of 15 minutes consuming energy
equal to 5.58oC = T Α 0.75 kWh each time causing elevation of mean water
temperature 1 6.01oC for each phase = T Α and 2 respectively. The
fluctuation in temperature of the system during the three phases of the
experiment are listed below.
List price change _T
(1 phase)
Change _T
(2 stage)
Change _T
(3 phase)
Final Price
TTANK-Low 30.17 +0.06 +0.26 +0.28 30.77
TTANK-Middle 30.19 +5.07 +0.11 +7.16 42.53
TTANK-Up 30.28 +11.6 -0.59 +10.59 51.88
TTANK-Mean 30.21 +5.58 -0.07 +6.01 41.73
Table 2 Temperature changes of water in the tank (b)
From these experiments and for both phases of the use of electricity
resistance to heat water appears to raise the average temperature of Nero
from different values of the initial 10oC required to spend an average energy=
T Α average water temperature in 27.04min using resistance = equal to
1.352 kWh for a period of operation t 3 kW.
8.3 Combination of A / C hybrid photovoltaic / thermal solar systems
(PV / F systems or PV / T systems)
Under the combination of wind and solar energy to meet
energy requirements of a building can use hybrid photovoltaic /
solar thermal systems could increase the overall efficiency of
installation.
It is known that most of the absorbed solar radiation
photovoltaic cells is not converted to electricity but heat, which
contributes to the increase in temperature resulting in a decrease in electrical
264
performance. Solar systems have the potential to provide both electricity and
thermal energy are hybrid photovoltaic / thermal systems. These systems as
reported in a previous chapter consists of PV panels with integrated thermal
unit of heat gain of FB, where a heated fluid circulating $, while cooling the PV.
These hybrid devices can be used to heating the water at low temperatures
(up to 40oC) to achieve at the same time maintaining low temperatures in the
PV modules. In Solar Energy Laboratory, University of Patras have developed
various types of PV / H systems using water or air as a fluid heat gain to
improve their overall energy efficiency. The main types of hybrid PV / i
appliances water (PVT / WATER) can carry an additional lens (PVT + GL) to
increase efficiency or thermikistous be uncovered to have no reduction in
power efficiency. Figure 16 shows the combinations of the above hybrid PV / h
water collectors.
Figure 16 Hybrid PV / h water solar panels, with or without lens
The subject is the basis of the work Y. Tripanagnostopoulos, M. Souliotis, Th.
Makris, P. Georgostathis 2007 "Design and performance of hybrid PV / T solar
water heaters"
Hybrid photovoltaic / thermal water can be linked to bin
store water for daily operation on natural flow by replacing flat
thermosifonikous PV panels and frames (Figure 17).
Figure 17 Hybrid PV / i thermosyphonic system
Moreover, under the working Y. Tripanagnostopoulos, 2006: "Cost effective
designs of
Building intergrated PV / T Solar systems "to avoid the operation of hybrid PV /
i panels of high temperature and thus reducing the electrical efficiency of both
the temperature and the optical loss resulting from the use of additional glass
cover, the these devices can be combined efficiently with thermal solar
collector. In this case the hybrid PV / i collector is mainly for cooling and solar
water preheating, while the main water heating is achieved with solar thermal
equipment. Figure 18 shows the layout thermosifonikis device combining the
hybrid PV / i device device Figure 18 Combined PV / i thermosifoniki solar
collector device
8.3.1 Daily charts yield hybrid PV / i thermosyphonic
System This section presents charts indicative of the performance and daily
functioning of the hybrid PV / i developed the Solar Energy Laboratory,
University of Patras. Graph 25 shows the change of key parameters during the
daily operation of PV / i collector while Figure 26 shows the change in the
electrical efficiency of PV frameworks in relation to temperature and thermal
efficiency of PV / h units collector and without glass cover.
0
5
10
15
265
20
25
30
35
40
6:00 7:30 9:00 10:30 12:00 13:30 15:00 16:30 18:00 19:30 21:00
Time (0res)
Temperature (oC)
0
100
200
300
400
500
600
700
800
900
1000
Solar radiation (W m-2)
Average water temperature Ta Wind Speed Radiation
'Iagramma 25 Day function hybrid PV / i sink without transparent cover
n el = -0.0003 T pv + 0.0989
n el =-0.0005T pv + 0.1229
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0 10 20 30 40 50 60 70 80 90 100 110 120
Temperature (oC)
PV electrical efficiency
PVT Glazed
PVT Unglazed
0
0.1
0.2
0.3
0.4
0.5
266
0.6
0.7
-0.02 -0.01 0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.1
, T / G (W-1K m2)
Thermal performance of PV / T
PVT GL PVT UNGL
'Iagramma 26 (a) Variation of electrical efficiency of hybrid PV / i collector with
and without
glass cover (b) Performance of hybrid PV / i thermosyphonic solar collector
8.4 Energy study to meet the energy needs of a house
the output of the power systems
In this section we calculate the amount of energy produced at the time
during the experiments and then consider the extent of coverage of energy
needs a home of a middle class family.
8.4.1 Generated energy from PV under
The total energy produced by the PV framework during
experiments and a total of 396 days was 194.60 kWh while the corresponding
amount
energy used by the surface of PV was 3187.87 kWh. Furthermore, the
average yield
converting the above period was 6.1%. The following diagram appears
produced from the PV and the incident energy from the sun for each month.
0
30
60
90
120
150
180
210
240
270
300
330
360
Months
Energy (kWh)
PV Sun
8.4.2 energy produced by the A / C
The A / C as mentioned in the previous chapter after 269 days
deactivated due to mechanical problem. For this reason, and to calculate the
267
energy would be produced from the A / C when running for the remaining days
saw an average mode. On this basis, the energy produced by the A / C in the
actual operation time was 25.78 kWh, while the amount of energy estimated to
be produced by simulation was 11.30 kWh, total 37.08 kWh. The average
conversion efficiency during the operation of A / C was 5.7%. Also the amount
of wind energy accepted by the A / C on the surface to define the fins was
620.82 kWh. Graph 28 shows the energy produced by the A / C during the
operation.
0
10
20
30
40
50
60
70
80
90
100
Σεπ. Οκτ. 07 Nov 07. 07 _ek. Ιαν. 07 08 08 Fev.08 Μαρ. Απρ. 08 May. 08
Months
Energy (kWh)
A / C Blowing
'Iagramma 28 Total monthly energy production from the A / C during the
operation
8.4.3 Generated energy from the water heater collector
The calculation of the energy produced by the water heater collector is
piopolyploki a process and depends on the average water temperature in
container levels of radiation-site. For the solar potential
Greece is considered that 1 m2 solar collector can deliver maximum power
700 W.
In the present work for calculating the useful energy we felt in the middle
operating temperature value 40o
= Mean T C. This takes into account the temperature
This and the equation of efficiency resulting from experimental measurements
(Figure 18) estimated that the total energy system was learned from
1686.04 kWh while the system accept energy from the sun equal to 3120.58
kWh. To
Note that these results emerged from the analysis of 305 days from
all days of the experiment (396 days) and during that showed
sometimes technical problems.
8.4.4 Coverage of basic electricity needs in a house
This section will be a study on the coverage of basic electrical and
268
thermal needs of a house assuming two scenarios of energy consumption.
The
study will be based on energy output of the systems under study in this
work. The total electric energy produced by the A / C and frameworks such as
PV
showed in the previous paragraphs are a total of 231.68 kWh in 396 days
corresponds to 213.55 kWh / y, while the heat from the water heater system
estimated to be 1686.04 kWh a total 305 days, corresponding to 2017.72
kWh / y.
To calculate the monthly consumption of electricity in a home
electrical installation must take into account the strength of each device and
the hours
operation during the month. Table 3 shows the average consumption
energy to serve the basic needs of a home.
In the first case (house # 1) is assumed to be operating all machines
shown in Table 3. It is estimated that the consumption in autumn and spring is
327.7 kWh, summer is 413.00 kWh in winter 416.4 kWh. Therefore, the annual
electricity consumption of household No1 is 4454.4 kWh, representing an
average daily consumption equal to 12.20 kWh. The experimental results of
the annual electricity output from the A / C and photovoltaic modules of the
test facility is 213.55 kWh and 0.585 kWh / d. This means that the device
studied can cover 4.79% of annual electricity needs of the house
No1. In the second case (house No. 2) examines the hypothesis that home
No. 2 is about 50% less consumption at home No1. This can be done with the
use of certain appliances such as air conditioner, the
dishwasher and avoid unnecessary consumption of electricity for lighting and
heating. By doing this at home No2 consumption will be for the winter months
208.20 kWh per month and the spring and autumn months 163.5 kWh per
month. Thus, the annual electricity consumption of the house No. 2 is 2230.20
kWh, representing an average daily consumption equal to 6.11 kWh. This is an
economic power consumption and can be considered reasonable and close to
the average household consumption. Then cover the electrical energy needs
of the house No. 2 on the basis of annual power output from the A / C and the
PV panels will be 9.58%.
Electric
Power
(KW)
Hours
day
Consumption
per month (kWh)
Refrigerator 0.32
24 (40% power
269
year)
92.20
Color TV 6 0.20 36.00
Washing 0.50 0.5 7.50
Vacuum cleaner 0.65 0.12 2.30
Toaster 1.00 0.1 3.00
Air conditioner 0.86
10 (10 days
summer months)
86.00
Electric oven 2.60
0.5 (power 25%
year)
9.80
Mixer 0.15 0.10 0.50
Ventilation kitchen. 0.20 1.00 6.00
Electr. Iron 1.1
0.3 (power 50%
time)
5.00
Electr. Kitchen 3.7 0.4 54.4
Water Heater
oil;
E consumption
0.77 8 (winter only) 89.00
Dishwasher 1 1.20 36.00
75.00 Lighting
Table 3 Electricity consumption household
For the thermal needs of a house in hot water with solar
assumed that the family consists of four members, with a daily consumption of
hot
40lt water per person. Furthermore it was assumed that the average daily
temperature
water reservoir of the solar collector increases from 30oC to 60oC,
ie changes in 2T = 30 ° C..
Under these assumptions it was estimated that the energy required for
elevation of 160lt at 30oC is equal to 19857 kJ or 5.52 kWh. On this basis,
annual
thermal needs of a family of four is 2014.8 kWh. This amount of energy
as shown by the above experimental data can be covered by the
thermosyphonic manifold of the experimental device. This is not surprising
as the collector thermosifonikos studied is a commercial model
intended for applications in homes.
270
ESTIMATES - CONCLUSIONS
9.1 Considerations and conclusions
The study of the performance of devices exploiting solar and wind
potential for energy production is the main research topic
this work. The aim was combined use A / C, PV and thermal collector
to increase the overall efficiency of such a facility.
The measurements of meteorological parameters showed that the average
temperature
environment at the site systems were 21.93oC an average intensity
solar radiation 434.21 W m-2 while the wind speed was low-
modest, with mean equal to 2.99 m s-1.
From the study of plant experimental equipment showed that the total
energy output of PV frameworks for a period of 396 days was 194.60 kWh
the average performance of PV during the experiment is 6.10%. In
if the A / C, the energy produced during a period was 269 days
25.78 kWh, while the output energy was calculated using prosomoiosi,
due to the failure of A / C for a period of 127 days was 11.30 kWh. The
average
Chapter 9
performance of A / C for the period of operation was 5.65%. On the other
hand,
thermosifonikos collector functioned without any particular problem during
experiments, the maximum daily throughput takes the value nd, max =
71.42%. The
heat yielded the solar collector during the measurement was
1686.04 kWh We also examined possible combinations of the studied systems
to
increase the efficiency of the installation. Initially we studied the case
heating water in the container thermosyphonic collector power
derived mainly from the A / C because it allows 24-hour operation in relation to
FB frames. It was estimated that raising the temperature of water from various
temperature levels at 10oC need to spend energy equal to 1.352 kWh
using electrical resistance of 3 kW. Furthermore, we studied the prospect of
implementing
hybrid photovoltaic / thermal (PV / h) first collectors to maintain
PV efficiency at high levels due to cooling and the other for the operation
energy lost in the form of heat loss due to the low overall
PV performance data. Based on a series of works published by the
Solar Energy Laboratory, University of Patras presented proposals
application of hybrid PV / i-type collector thermosyphonic replacing the system
thermosyphonic collector PV-frames as well as the idea of combining
thermosyphonic collector hybrid PV / i system to preheat water before
271
introduced into the system where thermosyphonic place and the main heating.
Finally we studied the coverage rate in electric and thermal needs two
houses with different daily consumptions by the energy produced by the
period of experimentation. More specifically, it was estimated that the first
house
with an average daily consumption of 12.20 kWh rate to cover electrical needs
were
4.79%, while the second home with daily consumption 7kWh, which
approximates
highly reality, the coverage rate was 9.58%. On the other hand,
found that the thermal needs of a family of four could
covered by a collector thermosyphonic similar to that establishment.
A coverage rate of the electrical needs of 10%, resulting
more for a house that responds to a large extent in fact,
very important and this can be seen from the following reasoning.
The electricity consumption in our country at the national level is estimated to
be approximately
70000 GWh in the year. As mentioned at the beginning of work, the building
sector consumes 40% of annual electricity consumption of a country. The
percentage of the levels of Greece indicates that the building sector consumes
28000 GWh. It is obvious that the establishment of a unit similar to that studied
(A / C power 400W and PV power under 220W) in 75% of homes in Greece
could be energy savings of about 2100 GWh per year, serving more than 3%
of total electricity. A replacement power through the use of these small units of
renewable energy can help stinexoikonomisi 399 tonnes of carbon dioxide
annually into the environment.
272
Advisor: Professor Constantine Dervis NTUA
Thank you very much Professor, School of ECE, Mr. Dervis for his valuable
help during the preparation of my thesis.
Especially my thanks to Dr. G. proposed Mergos for cooperation in the course
of the experiment and the contract of employment.
CONTENTS
Introduction ................................................. ..................................................
............................ ... ... 9
1.2 Dielectric
sizes ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ........................... . .
.. 11
1.2.1 Force between
charges ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ............................ ....... 11
1.2.2 Complex relative dielectric
epitreptotita ... ... ... ... ... ... ... ... .............................. ... 11
1.2.3 An alternative view of complex dielectric
constant ... ... ... ... ... ... ... ... ... ... 12
1.2.4 loss tangent ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
.... ... 13
1.3 Electric and dielectric properties of electrical insulation materials ... ... ...
... ... ... ... .... ... .14
1.3.1 Specific conductance volume (s) and specific surface conductivity (in)
... ... ... ... .. ... .. 14
1.3.2 Energy absorption in insulating
materials ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .. ... 15
1.3.3 Desirable properties of insulating
materials ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... 15
1.3.4 The dielectric
mechanisms ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ............................. .... 16
1.4 Dielectric
measurements ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
274
.... ... .18
1.4.1 Parallel plates with
dielectric ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 18
1.4.2 Comparison of serial and parallel equivalent
circuit ... ... ... ... ... ... ... ... ..... 20
1.4.3 Dielectric
spectroscopy ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ..... ... .. 21
1.4.4 Dielectric - Spectroscopy in the time ... ... ... ... ... ... ... ... ... 22
1.4.5 Dielectric - Spectroscopy in the frequency ... ... ... ... ... ... .... 28
2.3 Instrumentation and experimental ... ... ... ... ... ... ... ... ... ... ... ............ ...
... ... ... 40
2.3.1 HP 4284A Precision LCR Meter (measuring bridge
LCR) ... ......... ... ... ... ... ... ... ... ... 40
2.3.2 WEISS KWP64 (Temperature Controlled Test
Chamber) ... ... ... ..................... 41
2.3.3 The vacuum
system ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ............................ .......... ...
.. 42
2.3.4 HP 16451B Dielectric Test Fixture (cell
counting) ... ... ... ... ... ... ... ... ... ... ... ... ..... 45
275
2.3.5 Device Control
Moisture ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... .... ... ... ...... 47
2.4 Experimental procedure ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
... ... ... ... ... ... ... 49
Edit measuring
2.5 ... ... ... ... ... ... ... ... ... ... ... ... ... .................................. ................... 50
3.3
Conclusions ................................................ ... ... ... ... ... ... ..........................
..... ... ... ... ...... 58
Introduction
The total current flowing through the sample capacitor (Icharge) and
through resistance losses (Iloss) are:
The expected levels of relaxation for any material derived from the ratio of
stored energy emitted in a time period. Per cycle frequency is:
For highly insulating materials, the vector of ER close to that of ER, while
tand → 0. Thus, when the extent of vector error eerror measuring devices
do more than measure the ER of the measured material, the total
measured derror angle can be negative.
1.3.1 Specific conductance volume (s) and specific surface conductivity (in)
These two types of conductivity are shown in solid insulating body and
force it to <to. The specific surface conductivity (in) is significantly affected
by humidity and surface contamination of the body. It is responsible for
creating the current creep, relatively constant quantity. The distribution of
density, but this power is not uniform, because the bodies preferably follow
certain conductive paths of leakage or cracks on the surface of the body.
where
• Em: maximum EM field intensities U.S.;
• ER, SC: dielectric constant of the body and the gap respectively
• tand: loss tangent, or rate of absorption or dielectric loss
The loss tangent is the behavior of the material circumstances field
frequency, temperature, etc. The angle d shows the time a head in which
the dielectric monitor the change in the field in a capacitor, compared to the
operation of the capacitor dielectric was whether the gap. In particular, in a
capacitor the dielectric medium is an insulator, the value of loss tangent
equal to the ratio of energy absorbed from the field to the energy stored
and retrieved from the reinforcement of the capacitor in each period.
,
Substituting we find the relationship between serial and parallel capacity
sizes:
The last expression describes the Complex dielectric constant using the
serial equivalent circuit. In practice, it is the result obtained for the material
284
does not depend on the form of equivalent circuit used.
From the theory of circuits can compute the time dependent polarization P
(t) for any form of time-dependent excitation R (t) of the specimen as it is
known that specific solutions for unit step excitation. This is done using the
convolution integral or Dahamel and the result is:
, Where E ∞ = 1 + x ∞
The polarization current (or absorption or load) ipol (t) of the specimen is
recorded as:
287
Figure 1.7: Voltage and current in polarization in the time
The 2nd term relationship (3) fails only if the charging period TC is large
enough to complete all procedures polarization. The idepol is proportional
to f (t) as the dc conductivity equal the dielectric is not taken into account,
but can easily be calculated from the difference between ipol and idepol.
Thus, the relation (3) is a second basic equation for measuring f (t) of the
dielectric material in the time domain.
However, if the charging period TC is weak and will be able to burn the 2nd
term so there is a phenomenon''memory''in the dielectric polarization
phenomena that are not completed. In this figure the peaks of power
associated with the d (t) in relations (2) & (3) is not included for obvious
reasons.
Practical measurements of ipol idepol and made a two electrode technique
and the results depend on the properties of insulating materials and
geometry of the insulation system.
Figure 1.8: Circuit for measuring currents and ipol idepol time domain
288
Considering the convolution of the last term of relation (4) the operator p as
Laplace, we get
The frequency range is from 0 ≤ h ≤ ∞. From the relations (6) and (7) we
get the total current density:
The bulk of this power comes from Complex electric displacement D (z)
which is proportional to the relative dielectric Complex epitreptotita ER * (y)
according to the formula:
where:
Thus the dielectric loss factor tand (y) is given by the formula:
289
The real part of relation (11) represents the capacity of a specimen, while
the imaginary part represents the losses. Both the real and the imaginary
part depends on the frequency. This does not appear, however, whether a
measurement''C-tand''becomes a frequency. After aging the materials will
change these quantities in different ways in different regions of the
spectrum, new diagnostic tools to monitor and detect this effect.
Equation (7) shows the interchange between the time domain and
frequency domain. Consequently, the real and imaginary part of complex
susceptibility x (y) can be converted to the dielectric response function f (t)
and vice versa. The two regions ranging from 0 → ∞, but in practice for
each conversion, only the results of a finite measurement is available.
Ultimately, it should be noted that all dielectric quantities more or less
dependent on temperature and it is necessary to take into account in any
comparison or measurement of these quantities.
A quantity of cement A was dissolved in acetone and left to dry, but adding
contamination. This was to be pure cement A, which has undergone the same
treatment as that with the addition of cements and cement serve as reference
for them. This material is referred to as "cement-treated A.
Figure 2.7: Cast stainless steel. From left to right: a plunger (diameter 16mm),
matrix, base and ancillary to the release sample.
(A) (b)
Figure 2.9: The two ways of positioning the mold in the press, (a) to compress
the cement and (b) the export of the produced tablet.
Legend: (1) Piston (2) Matrix (3) Base (4) Cement CaCO3, (5) Auxiliary
release point sample (6) Level of support.
291
So the pressure on the cement for oil pressure Poil = 120bar is Px = 575bar
about.
The fabrication process is as follows: the desired amount of cement is weighed
and placed in the mold, placed under the plunger of the press and subjected to
mechanical pressure for about 20min. At the appropriate amendment to the
assembly of the mold (see Figure 2.9-b) re-enter the press in order to
smoothly and carefully unpacked to get the final tablet.
Figure 2.10: The left (white) tablet consists of treated cement A, while the right
(pink) from cement mixing A with 0.1% by weight pigment Fe2O3.
292
Figure 2.11: The bridge LCR (1) and CS (2) for control
293
Figure 2.12: The temperature control chamber WEISS KWP64
2.3.3 The vacuum system
The test samples were placed in a vacuum environment to afygranthoun. The
vacuum system consists of two pumps connected to a cell. Among them there
are pipes and valves. Two pressure sensors (gauges) are in different parts of
the system.
The conditions of low pressure created with the help of two-stepped rotary
pump with oil (Figure 2.13). The pump is equipped with an eccentric cylindrical
rotor to rotate, which scans the gases through the cylinder (stator) containing
it. The air is prevented from passing by the area of high pressure at a vacuum
system of two blades (vanes) located at opposite ends of the rotor. The entire
device is immersed in oil that lubricates the moving parts and act as sealing
means. This type of pump is the most common today for creating a vacuum at
pressures of up to 10-2 to 10-3 mbar.
For lower pressures, which are classified as high vacuum (High Vacuum), the
air does not respond adequately to try and push compression by pistons and
rotors. At such low pressures the gas molecules act as individual particles
rather wandering inside the pump rather than as a continuous fluid. The most
common type of pump is the high vacuum diffusion pump, invented in 1913.
The pump that uses a vapor stream (jet vapor), hydrocarbons produced by
boiling or synthetic oils that momentum moving in randomly moving molecules
leads to the area of high pressure pump. Since the pumps are operated only at
294
low pressures, the exit must always be connected to the input of a mechanical
pump support (usually rotary).
In this way the system operates high vacuum laboratory, shown in Figure 2.14.
But there is the possibility to operate using only a rotary switch through a
switch, bypassing the diffusion pump. This procedure was followed in our
experiment, as there was no requirement to ensure high vacuum conditions for
drying pellets.
Figure 2.14: The system vacuum. The various components are: 1) vacuum
chamber, 2) diffusion pump, 3) The rotary pump, 4) the switch switching 5)
The control and power
295
Σχήμα 2.15: Διάγραμμα του συστήματος δημιουργίας κενού
Figure 2.17: Diagram showing how to connect the terminals of the quadrupole
wire electrodes of the cell
296
measurement results in low frequencies. This may be due to the fact that when
the ring is grounded to the upper plate in contact with the tablet, it is possible
to enter the grains of calcite cement in the gap between the electrode and the
ring. The result is that it appeared a kind of jumper, which led us to falsify
measurements for the dielectric constant
.
Figure 2.20: The setup used for conducting peiramatos.1) bridge LCR, 2) glass
jar with water and shaker, 3) a heated plate, 4) control humidity chamber
297
containing the cell measurements, 5) nitrogen cylinder.
To carry out the experiment and taking the appropriate size and graphics used
on computer. Well designed software in the language C, which enables the
device exclusively by the computer through the card contact HP-IB.
2.4 The experimental procedure
Before the measurements, solid samples and the film dried in a vacuum
environment (3 • 10-2mbar for about 15min), to ensure the removal of gas or
water that may have been absorbed into the surface. The process of thermal
curing is not preferred because the surfaces of CaCO3 crystals can be
influenced by temperature. This phenomenon is probably related to surface
emissions CO2, which if started would reduce the energy gap on the surface
of calcite.
In the first experiment the cell containing the tablet was placed on a laboratory
bench, without control of environmental conditions. Therefore, measurements
were made under conditions of facilities. The results described in Chapter
Three. Subsequently, measurements were performed in oven Weiss, a
temperature cycle. Can physical capacity of the furnace to reach a
temperature range of -75 to 130 ° C, but due to the limited range of operating
temperatures of the cell measurements (0οC to 55oC) changing the
temperature only by 5οC up to 50oC. Determinant of no further use of the
furnace in our measurements was the fact that with increasing temperature
although there are changes in the dielectric properties of the tablet, but there
was a smooth transition back when he returned to normal. Also noticed that
with the change of temperature in the oven, changed and humidity inside the
oven. For more details on the results of the measurements we got to talk to the
fourth chapter. For the next experiment was done using laboratory device
described above. This provision achieve the change of humidity regardless of
the temperature inside a glass booth, since we are mainly interested in the
dielectric response for the change of humidity of the tablet.
The measurements are made as follows: first, place the tablet in the cell and
measure the thickness using the vernier it has and get measurements of Cp
and G sizes of material across the spectrum of available frequencies (20Hz -
1MHz). Repeat the measurement for different values of temperature or
humidity. Finally, remove the tablet by placing electrodes at exactly the same
distance than that which had existed when the tablet, and determine once Cpo
size and conductivity of air, which was neglected by the very low price. We
confirmed experimentally that the value of the capacity of air Cpo remains
constant regardless of temperature and humidity so we can calculate the real
(k = Cp / Cpo) and the imaginary part (k = G / oCpo) of dielectric constant, and
loss tangent (tand = k / k).
The parameters used for measurements were:
i) Logarithmic scale spectrum
298
ii) Frequency range: fstart = 20 Hz fstop = 106 Hz
iii) Measurements of Cp - G (capacity-conductivity parallel)
iv) Average price per avg = 8 count
v) time between measurements tbm = 5
vi) Integration factor: long (internal regulation of body)
When measuring a sample of circular disk of radius rx = 19mm, and the fact
that panels have circular shape with rol = 8mm, valid relations:
and
When the measured material is dry calcite sample, change the numerical
values of the above. The sample is rectangular with dimensions 31mm ×
299
55mm. Using AUTOCAD program is that the area of the sample located
between the plates is Sx = 1019mm2, while the surface area of air is SA =
115mm2. Thus we have finally:
and
300
100
Relative dielectric constant K'
1000
10
100
loss K''
Σχήμα 3.1: Πραγματικό (πάνω) και φανταστικό (κάτω) μέρος της μιγαδικής
διηλεκτρικής σταθεράς του ασβεστίτη. Τα σύμβολα εξηγούνται στον παρακάτω
πίνακα.
10
301
Συνθήκες συμπίεσης ασβεστίτη Σύμβολα
Στερεός ορυκτός ασβεστίτης x
Κονία τύπου Α Μαύρα σύμβολα
Κονία τύπου Β Λευκά σύμβολα
Ασυμπίεστη Κονία Κύκλος •
Συμπιεσμένη Κονία Τετράγωνο
Δισκίο σχηματισμένο υπό πίεση 600bar Ρόμβος ♦ ◊
Δισκίο σχηματισμένο υπό πίεση 800-1000bar Τρίγωνο
K' (1MHz)
9
2
d (g/cm^3)
1
0,00 0,50 1,00 1,50 2,00 2,50 3,00
Figure 3.2: Relative Dielectric Constant versus density solid calcite sample
(triangle) samples of cement A (square) and B (triangle) under different
conditions of compression.
−−−−−−−−− −−−−−−−−−
+
+
+ σs σs
p ~ V(fH)
V(fL) ~ κ′ c
κ′
E (fL) - -c - κ′ a ir ∼ 1 E (fH)
σ a ir ∼ 0
+ + + + + + + + ++ + + + + + + + +
(a ) (b ) Figure 3.3:
Grain calcite located in an alternating electric field. (A): Low frequency: dipole
formation due to redistribution of surface load. (B): High frequency: the time
required for the redistribution of surface load is greater than the period of the
electric field, so it presents a surface polarization phenomena.
The dielectric response of calcite grains may be associated with higher density
electronic statements surface with composite materials (composites), which
contain small particles inside the volume. Electronic statements of imported
303
surface due to the fact that the microcrystalline calcite abruptly terminate the
perfect periodicity of the hexagonal crystal lattice on the surface. In this case,
there are solutions of the equation Schrödinger, corresponding to the
introduction of energy levels inside the forbidden gap insulator at fantastic
prices kymatodianysmatos k. These wave equations are aposvenymena
waves, depleting exponentially with depth from the surface of grains. Are
spatially localized, in contrast to Bloch waves propagated within the
microcrystals in a perfect microcrystalline
304
(a) (b)
Figure 3.4: Diagram of dynamic energy of a grain nanodiilektrikou located in
an alternating electric field. (A): Saving energy on the surface protects the
volume of material from the field of low frequency. (B): At high frequencies,
the energy absorbed in volume, causing a tilt of the energy bands.
The overall distribution of electrons needed to render the surface fully
electrically neutral can only be made when the band of surface states are
partially complete. The''neutral''your level of Buddha, is the level to which the
completeness of the statements of a surface electric neutral surface. When
there are empty statements of energy beneath the Buddha, then the surface
has a positive net charge, and if there is full statements on the Buddha, then
the surface acquires a purely negative charge.
For the crystalline grain size of less than 1μm, the process of absorbing power
to the surface or volume, which is shown in Figure 3.3, can be modeled
according to the potential energy diagrams, as shown in Figure 3.4. At low
frequencies (Figure 3.4-a) the electricity supplied alter the occupancy of
surface states in the polar ends of the molecule, thereby inducing surface
stripping bodies. The high and low occupancy of surface conditions (ES-) and
(ES +) respectively at opposite ends of grain determine the amount of
electricity that is stored on the surface of the grain from the field, as AL = (ES-)
- (ES + Vapp ..⋅ ) = q The levels of occupancy of surface states-ES and ES +
at opposite polar ends of each grain will be modified by the presence of
oxidation, absorbed gases and vapors of water.
The proposed mechanism of energy absorption in surface states may be true
in most practical cases the existence of electric field. Indeed, given the small
size of grain prices in the internal field can be extremely high even for small
305
changes in occupancy levels of surface conditions. For example, 100nm grain
diameter and distance between the levels of occupancy of surface conditions,
CI = (ES-) - (ES +) = 1eV, the internal field can rise to the price 0.1MV/cm,
which could cause pre- degradation phenomena (prebreakdown) in most
insulating materials.
Thus, for frequencies below 10kHz in this case, dipole moments developed
due to surface polarization, since the surface of the grain behaves as a non-
equipotential. The electric fields at higher frequencies do not allow the
redistribution of surface load, so the electricity is stored in the volume of
grains, as seen from the slopes of the energy bands in the diagrams of Figure
3.4-b, where for example DE = = not = DEc DVap.⋅ q
3.3 Conclusions
Although the mineral calcite solid showing dielectric constant behavior
independent of frequency, the heap properties are dependent both on the size,
and the density of compaction. At high frequencies, the range of 1MHz, the
relative dielectric constant determined solely by the density compression. At
low frequencies k has a relaxation, which can be attributed to the slow surface
polarization mechanisms.
The current losses in the breeze increases exponentially with the low
frequencies. Prices are higher for samples finest cement, indicating that the
surfaces can control the overall conductivity. The nanoparticles can absorb
electricity or to their surface (low frequencies), or through its bulk (high
frequency) and can be modeled using the dynamic chart generation.
307
20 2.55E-11 7.92E-10 4.47E-09 6.04E-12 4.23E+00 19.22757 5.89E+00 3.06E-0
30 2.23E-11 1.02E-09 5.77E-09 4.33E-12 5.15E+00 24.38845 7.07E+00 2.90E-0
40 2.05E-11 1.28E-09 7.25E-09 3.66E-12 5.60E+00 26.93313 7.88E+00 2.93E-0
50 2.07E-11 1.78E-09 1.00E-08 3.61E-12 5.75E+00 27.77601 8.84E+00 3.18E-0
60 1.89E-11 1.93E-09 1.09E-08 3.47E-12 5.43E+00 25.99843 8.30E+00 3.19E-0
70 1.83E-11 2.24E-09 1.27E-08 3.39E-12 5.41E+00 25.8528 8.50E+00 3.29E-0
80 1.77E-11 2.46E-09 1.39E-08 3.51E-12 5.06E+00 23.88446 7.87E+00 3.30E-0
90 1.74E-11 2.76E-09 1.56E-08 3.59E-12 4.84E+00 22.67678 7.67E+00 3.38E-0
100 1.70E-11 3.06E-09 1.73E-08 3.58E-12 4.76E+00 22.21661 7.68E+00 3.46E-0
200 1.52E-11 5.31E-09 3.00E-08 3.66E-12 4.14E+00 18.70414 6.51E+00 3.48E-0
300 1.42E-11 7.33E-09 4.13E-08 3.70E-12 3.83E+00 16.95902 5.93E+00 3.50E-0
400 1.35E-11 9.25E-09 5.22E-08 3.73E-12 3.63E+00 15.82604 5.57E+00 3.52E-0
500 1.30E-11 1.12E-08 6.30E-08 3.75E-12 3.48E+00 14.972 5.34E+00 3.57E-0
600 1.26E-11 1.30E-08 7.31E-08 3.76E-12 3.36E+00 14.324 5.16E+00 3.60E-0
700 1.23E-11 1.47E-08 8.31E-08 3.76E-12 3.28E+00 13.84844 5.03E+00 3.63E-0
800 1.20E-11 1.65E-08 9.28E-08 3.76E-12 3.20E+00 13.41041 4.91E+00 3.66E-0
900 1.18E-11 1.82E-08 1.03E-07 3.77E-12 3.13E+00 12.99674 4.82E+00 3.71E-0
1000 1.16E-11 1.98E-08 1.11E-07 3.79E-12 3.06E+00 12.61701 4.68E+00 3.71E-0
2000 1.03E-11 3.44E-08 1.94E-07 3.79E-12 2.71E+00 10.61742 4.07E+00 3.84E-0
3000 9.55E-12 4.64E-08 2.62E-07 3.79E-12 2.52E+00 9.566113 3.66E+00 3.83E-0
4000 9.10E-12 5.64E-08 3.18E-07 3.79E-12 2.40E+00 8.890349 3.34E+00 3.76E-0
5000 8.78E-12 6.50E-08 3.67E-07 3.79E-12 2.31E+00 8.416508 3.08E+00 3.66E-0
6000 8.55E-12 7.25E-08 4.09E-07 3.80E-12 2.25E+00 8.062063 2.86E+00 3.54E-0
7000 8.37E-12 7.87E-08 4.44E-07 3.80E-12 2.21E+00 7.804952 2.66E+00 3.41E-0
8000 8.22E-12 8.50E-08 4.79E-07 3.80E-12 2.17E+00 7.572908 2.51E+00 3.32E-0
9000 8.11E-12 9.00E-08 5.07E-07 3.80E-12 2.14E+00 7.404366 2.36E+00 3.19E-0
10000 8.00E-12 9.53E-08 5.38E-07 3.80E-12 2.11E+00 7.240793 2.25E+00 3.11E-0
20000 7.51E-12 1.34E-07 7.53E-07 3.80E-12 1.98E+00 6.505476 1.58E+00 2.43E-0
30000 7.30E-12 1.61E-07 9.08E-07 3.80E-12 1.92E+00 6.206827 1.27E+00 2.04E-0
40000 7.19E-12 1.83E-07 1.03E-06 3.80E-12 1.89E+00 6.037197 1.08E+00 1.79E-0
50000 7.11E-12 2.02E-07 1.14E-06 3.80E-12 1.87E+00 5.924745 9.57E-01 1.62E-0
60000 7.06E-12 2.19E-07 1.24E-06 3.80E-12 1.86E+00 5.842386 8.64E-01 1.48E-0
70000 7.01E-12 2.37E-07 1.34E-06 3.80E-12 1.85E+00 5.772104 8.00E-01 1.39E-0
80000 6.98E-12 2.49E-07 1.40E-06 3.80E-12 1.84E+00 5.729783 7.35E-01 1.28E-0
90000 6.96E-12 2.56E-07 1.44E-06 3.80E-12 1.83E+00 5.705861 6.72E-01 1.18E-0
100000 6.93E-12 2.73E-07 1.54E-06 3.80E-12 1.83E+00 5.655879 6.47E-01 1.14E-0
200000 6.81E-12 3.70E-07 2.09E-06 3.79E-12 1.79E+00 5.481054 4.38E-01 8.00E-0
300000 6.75E-12 4.39E-07 2.47E-06 3.79E-12 1.78E+00 5.40821 3.46E-01 6.40E-0
400000 6.73E-12 4.80E-07 2.71E-06 3.79E-12 1.77E+00 5.365782 2.84E-01 5.29E-0
500000 6.71E-12 5.21E-07 2.94E-06 3.79E-12 1.77E+00 5.338222 2.47E-01 4.62E-0
308
600000 6.69E-12 5.55E-07 3.13E-06 3.79E-12 1.77E+00 5.318412 2.19E-01 4.12E-0
700000 6.68E-12 5.71E-07 3.22E-06 3.79E-12 1.76E+00 5.307745 1.93E-01 3.64E-0
800000 6.66E-12 6.05E-07 3.41E-06 3.78E-12 1.76E+00 5.291557 1.80E-01 3.39E-0
900000 6.64E-12 6.28E-07 3.54E-06 3.78E-12 1.76E+00 5.277371 1.66E-01 3.14E-0
1000000 6.63E-12 6.32E-07 3.57E-06 3.77E-12 1.76E+00 5.274313 1.50E-01 2.85E-0
Σε όλες τις μετρήσεις παρατηρούμε ότι οι καμπύλες των κ΄ , κ΄΄ και tanδ
παρουσιάζουν την ίδια γενική μορφή συναρτήσει της συχνότητας, εκτός ίσως από
μικρές διακυμάνσεις στα πρώτα δύο ή τρία σημεία. Οι διακυμάνσεις αυτές οφείλονται
κυρίως στην αστάθεια που παρουσιάζει η μέτρηση του Cpo στις πολύ χαμηλές
συχνότητες.
Χαρακτηριστική κ΄ ∼ f : Μορφή υπερβολής. Στις χαμηλές συχνότητες η τιμή της
σταθεράς κ΄ ήταν αυξημένη, ενώ όσο η συχνότητα τείνει στο άνω όριο συχνότητας
που θέσαμε, δηλαδή το 1MHz, προσεγγίζει μια σταθερή τιμή.
Χαρακτηριστική κ΄΄ ∼ f : Μορφή υπερβολής. Στις χαμηλές συχνότητες είναι μεγάλη
η τιμή της σταθεράς κ΄΄ , ενώ στο άνω όριο συχνότητας του 1MHz, προσεγγίζει το
μηδέν.
Χαρακτηριστική tanδ ∼ f : Όλες οι καμπύλες εμφανίζουν μία κορυφή σε κάποια
συχνότητα, ενώ στις μεγάλες συχνότητες τείνουν προς το μηδέν.
Από τα παραπάνω προκύπτει ότι γνωρίζοντας τη μεταβολή των κ΄, κ΄΄ ως προς
τη θερμοκρασία ή την υγρασία σε μία δεδομένη συχνότητα,π.χ 1kHz ή 10kHz, έχουμε
αντιπροσωπευτική εικόνα για το τι συμβαίνει και στις υπόλοιπες συχνότητες. Για την
tanδ δεν συμβαίνει αυτό, επειδή η συχνότητα κορυφής είναι μεταβλητή και επομένως
καμία συχνότητα δεν είναι αντιπροσωπευτική ολόκληρου του φάσματος.
Για το λόγο αυτό στα Σχήματα 4.1 και 4.2, δείχνουμε μόνο τη μεταβολή
των κ΄, κ΄΄ σε μία ορισμένη συχνότητα για τις διάφορες τιμές της
θερμοκρασίας.
Παρατηρούμε ότι στο πρώτο πείραμα, το κ΄ και το κ΄΄ αρχικά μειώνονται
τόσο με την αύξηση όσο και με τη μείωση της θερμοκρασίας (από 20 στους
50 και ξανά 20οC). Στο δεύτερο κύκλο αύξησης της θερμοκρασίας (από 20
στους 50 και ξανά πίσω μέχρι τους 40οC) δεν παρατηρούνται αξιόλογες
μεταβολές στα δύο μεγέθη, που έχουν πάρει σχεδόν σταθερή τιμή.
Στο δεύτερο πείραμα αρχικά παρατηρούμε το ίδιο φαινόμενο, δηλαδή
μείωση του κ΄ και κ΄΄ με την μεταβολή της θερμοκρασίας (από 20 στους 50
και πίσω στους 5οC). Μόλις η υγρασία αρχίσει να αυξάνεται πάλι, τα μεγέθη
αυξάνουν και επανέρχονται στις αρχικές ή και μεγαλύτερες τιμές. Όταν η
θερμοκρασία ξεπεράσει την τιμή του περιβάλλοντος τα μεγέθη αρχίζουν
ξανά να μειώνονται και ο κύκλος επαναλαμβάνεται με τον ίδιο τρόπο.
Παρατηρούμε ότι έχουμε δύο διαφορετικούς τρόπους μεταβολής των κ΄ και
κ΄΄ με τη θερμοκρασία, ανάλογα με το αν το κατώτερο σημείο του
θερμοκρασιακού κύκλου είναι στην τιμή του περιβάλλοντος ή κάτω από
309
αυτή. Μια υπόθεση που εξηγεί αυτό είναι ότι κατά τη θέρμανση ο φούρνος
αφαιρεί υγρασία από το θάλαμο σε θερμοκρασίες υψηλότερες από του
περιβάλλοντος, ενώ κατά την ψύξη κάτω από τη θερμοκρασία
περιβάλλοντος η υγρασία εισάγεται ξανά. Για να ελέγξουμε αυτή την
υπόθεση, τοποθετούμε το υγρόμετρο στο φούρνο και εκτελούμε τον ίδιο
θερμοκρασιακό κύκλο καταγράφοντας την σχετική υγρασία του θαλάμου.
Τα αποτελέσματα παρουσιάζονται στο διάγραμμα του Σχήματος 4.3 και
φαίνεται ότι επιβεβαιώνουν την παραπάνω υπόθεση.
Δοκιμάζουμε κατόπιν να κάνουμε τα διαγράμματα κ΄ και κ΄΄ ως προς τη
σχετική υγρασία του θαλάμου. Αυτά φαίνονται στα Σχήματα 4.4 και 4.5.
Παρατηρούμε μια τάση αύξησης των τιμών, όταν αυξάνει η υγρασία και
αντιστρόφως. Επειδή όμως ταυτόχρονα αλλάζει και η θερμοκρασία, δε
μπορεί να ληφθεί ασφαλές συμπέρασμα.
Βλέπουμε λοιπόν ότι οι διηλεκτρικές ιδιότητες του υλικού εξαρτώνται τόσο
από τη θερμοκρασία, όσο και από την υγρασία, οπότε είναι επιθυμητό να
παρατηρήσουμε την εξάρτηση από κάθε παράγοντα ξεχωριστά. Δεδομένου
ότι ο φούρνος WEISS του εργαστηρίου δεν έχει τη δυνατότητα μεταβολής
της θερμοκρασίας υπό σταθερή υγρασία, καταφεύγουμε στη διάταξη που
περιγράφηκε στο προηγούμενο κεφάλαιο. Όλα τα υπόλοιπα πειράματα
επομένως εκτελούνται σε θερμοκρασία περιβάλλοντος, μεταβάλλοντας την
υγρασία και περιγράφονται στην επόμενη παράγραφο.
310
Πήραμε μετρήσεις από τα ακόλουθα δείγματα: δισκίο (60) αποτελούμενο από
κονία τύπου Α περιεκτικότητας 0.1% Fe2O3 σε μορφή πιγμέντου, δισκίο (55)
αποτελούμενο από κονία τύπου Α περιεκτικότητας 0.00625% Fe2O3 σε μορφή
πιγμέντου, δισκίο (68) αποτελούμενο από κονία τύπου Α, δισκίο (41) αποτελούμενο
από κονία τύπου Β, δείγμα στερεού ασβεστίτη.
Σε τρεις περιπτώσεις επαναλάβαμε το πείραμα και δεύτερη φορά επειδή είτε το
εύρος της υγρασίας που επιτεύχθηκε ήταν μικρό, είτε έγιναν πολλές αυξομειώσεις τη
πρώτη φορά. Στα ακόλουθα σχήματα αυτό αναφέρεται ως δεύτερος κύκλος υγρασίας.
Στις επόμενες σελίδες παρατίθενται τα αποτελέσματα των μετρήσεων σε
συνάρτηση με τη συχνότητα. Για κάθε δείγμα εικονίζονται οι καμπύλες των κ΄, κ΄΄ και
tanδ πρώτα στη φάση ανόδου της υγρασίας και μετά στη φάση καθόδου της υγρασίας.
Στη συνέχεια εμφανίζονται οι τιμές των μεγεθών αυτών σε συνάρτηση με την
υγρασία για τη χαρακτηριστική συχνότητα του 1kHz. Στα διαγράμματα αυτά έχει
σημειωθεί το αρχικό (initial) και το τελικό (final) σημείο του κύκλου υγρασίας.
Παρατήρηση: Στα διαγράμματα του κύκλου υγρασίας, εμφανίζονται σημεία
που δεν αντιστοιχούν σε γραφικές παραστάσεις σε συνάρτηση με τη
συχνότητα. Αυτό συμβαίνει διότι τα διαγράμματα συναρτήσει της
συχνότητας εικονίζουν μόνο τις περιόδους σταθερής ανόδου και καθόδου
της υγρασίας του θαλάμου, ενώ στα υπόλοιπα εμφανίζονται και οι τυχόν
αυξομειώσεις που συνέβαιναν κατά τη διάρκεια του πειράματος.
311
4.3 Σχόλια – Συμπεράσματα από τη μελέτη μεταβολής της υγρασίας
312
υπάρχει μια καθυστέρηση στην απομάκρυνση του νερού από το δείγμα. Για
αυτό το λόγο οι τιμές των διηλεκτρικών μεγεθών μειώνονται με αργότερο
ρυθμό.Τα παραπάνω γίνονται περισσότερο κατανοητά εάν δούμε και τα
διαγράμματα που έγιναν συναρτήσει της υγρασίας για το 1kHz. Ειδικότερα
για το στερεό δείγμα φαίνεται πιο καθαρά η υστέρηση των τιμών των
διηλεκτρικών μεγεθών σε σχέση με τη μεταβολή της υγρασίας. Αυτή είναι
όμως η γενική τάση και για τα υπόλοιπα δείγματα, δηλαδή οι τιμές π.χ. του
κ΄ για την ίδια τιμή υγρασίας είναι κατά κανόνα μεγαλύτερες στη φάση
καθόδου παρά στη φάση ανόδου. Αυτό οφείλεται κατά πάσα πιθανότητα
στην υστέρηση της απορρόφησης ή της απομάκρυνσης του νερού από το
υλικό σε σχέση με τη μεταβολή της υγρασίας του χώρου. Επομένως η
υγρασία του υλικού είναι χαμηλότερη στη φάση της ανόδου σε σχέση με τη
φάση καθόδου και αυτό προκαλεί αντίστοιχη υστέρηση στη διηλεκτρική
απόκριση.Η προηγούμενη παρατήρηση δεν ισχύει πάντα για χαμηλές τιμές
υγρασίας. Μια πιθανή εξήγηση είναι ότι απαιτείται περισσότερος χρόνος για
να πέσει η υγρασία από μια χαμηλή τιμή σε μια ακόμη χαμηλότερη και στο
χρόνο αυτό προλαβαίνει να απομακρυνθεί περισσότερο νερό από το
δείγμα. Εξαίρεση αποτελεί το δισκίο με τη μεγάλη συγκέντρωση πιγμέντου
(0.1% Fe2O3), το οποίο παρουσιάζει βρόχο υστέρησης αντίθετης φοράς με
τα υπόλοιπα. Είναι πιθανό η παρουσία του οξειδίου να επηρεάζει την
απορρόφηση νερού από το δισκίο. Ωστόσο ο κύκλος της υγρασίας είναι
σχετικά μικρός (μέγιστη τιμή 65%), οπότε δεν είναι δυνατό να ληφθεί
ασφαλές συμπέρασμα. Όσον αφορά την εφαπτομένη απωλειών κάθε
δείγματος, έχουμε βρόχο της ίδιας μορφής με τα άλλα δύο μεγέθη. Η
εξαίρεση εδώ είναι το δισκίο κονίας Β, όπου η μορφή είναι εντελώς
διαφορετική. Από το διάγραμμα ‘ tanδ – f ’ προκύπτει ότι το δισκίο αυτό
παρουσιάζει έντονο φαινόμενο συντονισμού και η διαφορετική κάθε φορά
θέση της κεντρικής συχνότητας ως προς τη συχνότητα αναφοράς 1kHz δεν
επιτρέπει την κατασκευή ενός αξιόπιστου βρόχου υγρασίας. Πάντως το
φαινόμενο επαναλαμβάνεται και για τους δύο κύκλους υγρασίας με
παρόμοιο τρόπο. Ίσως το μικρότερο μέγεθος κόκκων επιτρέπει την πιο
εύκολη εισαγωγή και εξαγωγή νερού από το εσωτερικό του δισκίου.
Συμπερασματικά, μπορούμε να πούμε ότι κάθε αύξηση ή μείωση της
σχετικής υγρασίας του χώρου οδηγεί σε όλες τις περιπτώσεις σε αύξηση ή μείωση
αντίστοιχα των τιμών των κ΄ και κ΄΄. Όμως το ποσό της μεταβολής κάθε φορά
μπορεί να εξαρτάται από παράγοντες όπως η φύση του δείγματος (δισκίο ή στερεό
μάρμαρο), το μέγεθος των κόκκων, η παρουσία πρόσμιξης και το αν βρισκόμαστε
σε φάση ανόδου ή καθόδου της υγρασίας.
313
Βιβλιογραφία
314
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20. Application Note 1217-1 “Basics of measuring dielectric properties of
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21. Agilent 16452A Liquid Test Fixture, Operation and Service Manual,
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22. C.T. O’Konski, “Electrical properties of macromolecules V. Theory of
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23. W.C. Chew and P.N. Sen, “Dielectric enhancement due to electrochemical
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316
αγροτικών ≤ ισχύς
παραπροϊόντων 5
M
W
γ. Σταθμοί 401.0γ - > 0,5 MW ≤ Αποδιδόμ
ηλεκτροπαραγωγής με 0,5 ενη
χρήση βιοαεριου M ηλεκτρική
W ισχύς
δ. Σταθμοί 401.0γ - - > Αποδιδόμ
ηλεκτροπαραγωγής από 0,5 ενη
φωτοβολταϊκά M ηλεκτρική
συστήματα W ισχύς
ε. Σταθμοί 401.0γ - > 700 kW > Αποδιδόμ
ηλεκτροπαραγωγής από 20 ενη
ανεμογεννήτριες kW ηλεκτρική
ισχύς
≤
700
kW
στ. Μικροί 401.0γ - - - Αποδιδόμ
υδροηλεκτρικοί ενη
σταθμοί (<=10 MW) ηλεκτρική
ισχύς
277 Σταθμοί 401.0δ Το σύνολο
ηλεκτροπαραγωγής από
πυρηνική ενέργεια
Αρμόδιες Αρχές
Τα έργα και η δραστηριότητες υπάγονται σε κατηγορίες (Α1, Α2, Β3, Β4) ανάλογα
με την όχληση τους στο περιβάλλον. Σύμφωνα με την κατηγορία τους, αρμόδια
υπηρεσία για την Έγκριση Περιβαλλοντικών Όρων ( ΕΠΟ ) είναι το ΥΠΕΧΩΔΕ, ή
η οικεία Περιφέρεια, ή η οικεία Νομαρχία.
Η αντιστοίχηση κατηγορίας - αρμόδιας υπηρεσίας είναι η παρακάτω,
Α1 -->ΥΠΕΧΩΔΕ
Α2-->ΠΕΡΙΦΕΡΕΙΑ
Β3--> ΣΤΗΝ ΠΕΡΙΠΤΩΣΗ ΕΡΓΟΥ Β3 ΣΤΕΛΝΕΤΑΙ ΣΤΗΝ ΠΕΡΙΦΕΡΕΙΑ
ΠΡΟΜΕΛΕΤΗ ΩΣΤΕ ΝΑ ΑΠΟΦΑΣΙΣΤΕΙ ΑΝ ΤΟ ΕΡΓΟ ΘΑ ΕΞΕΤΑΣΤΕΙ ΑΠΟ
ΤΗΝ ΠΕΡΙΦΕΡΕΙΑ Ή ΑΝ ΘΑ ΕΞΕΤΑΣΤΕΙ ΑΠΟ ΤΗΝ ΝΟΜΑΡΧΙΑ.
B4 --> ΝΟΜΑΡΧΙΑ
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«φωτοβολταϊκά συστήματα» νοούνται οι εγκαταστάσεις παραγωγής
ηλεκτρικής ενέργειας μέχρι 20kW από ηλεκτρικές γεννήτριες φωτοβολταϊκών
συστοιχιών με τα συνοδευτικά τους έργα (οικίσκοι κ.λπ.), που προορίζονται να
υποστηρίξουν κατασκευές κεραιών.
Tην αρτιότητα του γηπέδου, η επιφάνεια του οποίου δεν επιτρέπεται να είναι
μικρότερη των 500 μ2.
Τις αποστάσεις των εγκαταστάσεων από τα όρια του γηπέδου, οι οποίες δεν
επιτρέπεται να είναι μικρότερες από 2,50 μ..
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Εγγυημένο Έσοδο χορηγείται για τρία (3) έτη από τη θέση του σταθμού σε
εμπορική λειτουργία. Σύμφωνα με τα στοιχεία που έδωσε ο Γενικός Γραμματέας
του υπουργείου, Κ. Μουσουρούλης:-Ένα μέσο νοικοκυριό καταναλώνει 5.000 -
7.000 κιλοβατώρες το χρόνο.
-Ένας φωτοβολταϊκός σταθμός ισχύος 1 κιλοβάτ παράγει κατά μέσο όρο 1300
κιλοβατώρες το χρόνο. Δηλαδη τα 20 κιλοβάτ παράγουν 1300χ20=26000
26000χ0,50= 13000ευρώ
1. ΚΡΙΤΗΡΙΑ ΠΡΟΣΤΑΣΙΑΣ
Σύμφωνα με την υφιστάμενη νομοθεσία, υπάρχουν κάποιες περιοχές
εντός των οποίων οι οικοδομικές δραστηριότητες ή οποιουδήποτε
άλλου είδους δραστηριότητες που πιθανόν να προκαλέσουν
αλλοίωση του φυσικού και πολιτιστικού περιβάλλοντος,
απαγορεύονται αυστηρά. ορίστηκαν οι παρακάτω περιορισμοί:
Περιοχές Natura: Δημιουργήθηκε ένα επίθεμα που οριοθετεί μια ζώνη 200
m από τα όρια των περιοχών Natura συμπεριλαμβάνοντας και την ίδια
την περιοχή, όπως αυτό ορίζει το ΥΠΕΧΩΔΕ, ώστε να μην επιτραπεί η
χρήση των συγκεκριμένων ζωνών για την εγκατάσταση φωτοβολταϊκών.
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Χώροι Παγκόσμιας Κληρονομιάς: Δημιουργήθηκε ένα επίθεμα που
οριοθετεί μια ζώνη 3 km από τα όρια των περιοχών Παγκόσμιας
Κληρονομιάς (που αναφέρεται στο Απολιθωμένο Δάσος)
συμπεριλαμβάνοντας και την ίδια την περιοχή. Είναι μια μεγάλη σε έκταση
ζώνης προστασίας που το επιβάλλει ωστόσο η υφιστάμενη νομοθεσία και
οι διεθνείς κανονισμοί.
Λοιποί Αρχαιολογικοί Χώροι: Οι αρχαιολογικοί χώροι του νησιού,
κυρίως της Ερεσσού και της Άντισσας όπως και το Βυζαντινό
μουσείο του Υψηλού, παρουσιάζουν μεγάλο αρχαιολογικό
ενδιαφέρον. Προκειμένου να ικανοποιηθεί το παραπάνω κριτήριο, τέθηκε
με βάση την νομοθεσία, μια ζώνη προστασίας 500 m από τα όρια, που
περιλαμβάνει και τις ίδιες τις περιοχές.
Προστασία Οικισμών: Έγινε κατηγοριοποίηση των οικισμών ανάλογα με
τον πληθυσμό τους, γιατί σύμφωνα με το υφιστάμενο νομοθετικό πλαίσιο,
για οικισμούς όπου ο πληθυσμός τους υπερβαίνει τα 2000 άτομα η
χωροθέτηση των φωτοβολταϊκών οριοθετείται σε απόσταση πέρα
των 500 m. Για οικισμούς με πληθυσμό μικρότερο των 2000 ατόμων, η
κατάλληλη απόσταση είναι πέρα των 250 m από τα όρια. Οι αποστάσεις
αυτές, αποσκοπούν στην αποφυγή οχλήσεων από αντανακλάσεις του
πάρκου στους οικισμούς.
Κριτήριο Προστασίας Κύριου Οδικού Δικτύου: Δημιουργήθηκε μια
ζώνη προστασίας 500 m γύρω από το κύριο οδικό δίκτυο. Το
υφιστάμενο νομοθετικό πλαίσιο παρουσιάζει κενά κι έτσι η συγκεκριμένη
ζώνη τέθηκε αυθαίρετα αλλά σύμφωνα με αυτά που ισχύουν για τους
οικισμούς, ώστε να αποφεύγονται πιθανόν αντανακλάσεις από την
εγκατάσταση προς το οδικό δίκτυο. Για να δημιουργηθούν οι Ζώνες
Αποκλεισμού, πρέπει τα επιμέρους επιθέματα που περιέχουν τις
απαγορευμένες περιοχές για χωροθέτηση φωτοβολταϊκών, να
συνδυαστούν (συνενωθούν) μεταξύ τους. Έτσι δημιουργήθηκε ένα
μοναδικό επίθεμα αποκλεισμού, όπως φαίνεται και στο παρακάτω
Διάγραμμα 3.
Διάγραμμα 3: Δημιουργία Ζώνης Αποκλεισμού από τα επιμέρους Επιθέματα
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3. ΚΡΙΤΗΡΙΑ ΚΑΤΑΛΛΗΛΟΤΗΤΑΣ
Η χωροθέτηση φωτοβολταϊκών συστημάτων, προϋποθέτει την ύπαρξη
κάποιων συγκεκριμένων γεωμορφολογικών χαρακτηριστικών καθώς και
διάφορων οικονομικών και κατασκευαστικών κριτηρίων. Έτσι λοιπόν:
Καταλληλότητα Δικτύου Μέσης Τάσης: Για να δημιουργηθεί μια ζώνη
καταλληλότητας γύρω από το δίκτυο ηλεκτροδότησης, τέθηκε μια μέγιστη
απόσταση από τα όρια του δικτύου στο 1 km. Δηλαδή, αυτό που
εξυπηρετεί στην εγκατάσταση των φωτοβολταϊκών, βρίσκεται εντός
αυτού του 1 km. Η απόσταση αυτή ορίστηκε θεωρώντας ότι
οποιαδήποτε δραστηριότητα πέρα από αυτό το όριο θεωρείται
οικονομικά ασύμφορη γιατί θα χρειαστεί κατασκευή δρόμων και
τοποθέτηση στύλων της ΔΕΗ.
Καταλληλότητα Ολικού Οδικού Δικτύου: Το οδικό οδικό δίκτυο,
περιλαμβάνει τους κύριους αλλά και τους δευτερεύοντες δρόμους του
νησιού της Λέσβου. Έτσι δημιουργήθηκε μια ζώνη καταλληλότητας από
τα όρια των δρόμων αυτών, έως και σε απόσταση 3 km . Η απόσταση αυτή
θεωρήθηκε ως ιδανική, ώστε να μην επιβαρύνει το όλο έργο με περαιτέρω
οικονομικό κόστος.
Κατάλληλες Χρήσεις Γης: Από τις υφιστάμενες χρήσεις γης, αυτές που
θεωρήθηκαν κατάλληλες για την χωροθέτηση του φωτοβολταϊκού πάρκου
χωρίς να προκαλείται οποιαδήποτε αλλοίωση του φυσικού περιβάλλοντος,
είναι αυτές με χορτολίβαδα, θάμνους και η άγονη γη.
Κατάλληλες Κλίσεις Εδάφους: Ένα άλλο σημαντικό επίθεμα, αποτελούν
οι κατάλληλες κλίσεις εδάφους. Θεωρήθηκε ότι οι κατάλληλες κλίσεις, αυτές
που μας προσδίδουν την μέγιστη επιθυμητή ακτινοβολία και κατά συνέπεια
μέγιστη απόδοση των φωτοβολταϊκών, είναι μεταξύ 40 – 60 μοιρών.
Σύμφωνα πάντα με το θεωρητικό υπόβαθρο, η κλίση που προτείνεται για
την εγκατάσταση φωτοβολταϊκού με σταθερή οριζόντια βάση, είναι αυτή του
γεωγραφικού πλάτους της περιοχής. Αφού η περιοχή μας έχει ενδεδειγμένο
γεωγραφικό πλάτος κοντά στις 39 μοίρες, τότε η επιλογή κλίσεων που
έχουμε κάνει, δεν παρεκκλίνει πολύ και θεωρείται αρκετά αποδοτική.
Κατάλληλο Υψόμετρο: Ως κατάλληλο υψόμετρο για την εγκατάσταση
του φωτοβολταϊκού πάρκου, θεωρήθηκε αυτό των 200 μέτρων, κοντά
δηλαδή στο μέσο υψόμετρο του νησιού. Το κριτήριο αυτό τέθηκε γιατί
θεωρήθηκε ότι είναι ιδανικό και αποφεύγονται ίσως πιθανές
αντανακλάσεις προς το έδαφος.
Κατάλληλος Προσανατολισμός Κλίσεων: Ο κατάλληλος
προσανατολισμός κλίσεων, είναι ένα απαραίτητο επίθεμα, που
δημιουργήθηκε με βάση το θεωρητικό υπόβαθροόσο αφορά το βόρειο
ημισφαίριο, ο ενδεδειγμένος προσανατολισμός φωτοβολταϊκών
στοιχείων με σταθερή βάση, είναι ο νότιος. Για το λόγο αυτό
θεωρήθηκαν ως κατάλληλες οι προσανατολισμένες κλίσεις: Νότιες,
Νοτιο–Ανατολικές και Νοτιο–Δυτικές, για την μέγιστη απόδοση των
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φωτοβολταϊκών με σταθερή οριζόντια βάση. Το επίθεμα των
κατάλληλων προσανατολισμένων κλίσεων, προέκυψε από την επεξεργασία
του επιθέματος των κλίσεων που έχουμε δημιουργήσει από το ΤΙΝ.
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ΠΕΡΙΟΧΗ ΝΕΣΤΑΝΗ ΑΡΚΑΔΙΑΣ
Δικτύου Μέσης Τάσης > 1κλμ ΝΑΙ
Ολικού Οδικού Δικτύου ΚΥΡΙΟΙ ΚΑΙ ΔΕΥΤΕΡΕΥΟΝΤΕΣ
Χρήσεις Γης ΧΟΡΤΟΛΙΒΑΔΙΚΟ
Κλίσεις Εδάφους> 40-60 μοίρες 40
Υψόμετρο 200μ 200
Προσανατολισμός ΝΑ ΝΑ
ΑΡΧΑΙΟΛΟΓΙΚΟΙ ΧΩΡΟΙ ΟΧΙ
ΠΑΡΑΔΟΣΙΑΚΟΙ ΟΙΚΙΣΜΟΙ ΟΧΙ
ΝΑΤUΡΑ 2000 ΤΚΣ & ΖΕΠ ΟΧΙ
ΝΑΤUΡΑ 2000 TKS ΟΧΙ
ΝΑΤUΡΑ 2000 ΖΕΠ ΟΧΙ
ΚΑΤΑΦΥΓΙΟ ΑΓΡΙΑΣ ΖΩΗΣ ΚΑΙ ΟΧΙ
ΘΗΡΑΜΑΤΩΝ
ΑΙΣΘΗΤΙΚΑ ΔΑΣΗ ΟΧΙ
ΓΗΠΕΔΟ ΜΕΓΑΛΥΤΕΡΟ ΤΩΝ ΝΑΙ
500μ
ΣΥΔΕΣΗ ΜΕ ΔΙΚΤΥΟ ΔΕΗ ΟΧΙ
ΑΠΟΣΤΑΣΗ ΑΠ ΟΙΙΣΜΟ ΝΑΙ
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"... The Nestani is the first station encountered by the traveler
Pausanias to enter the Arcadia from the Argolid, following the path of
scale and way before in Malevi. The wider horizon removed from
around the mountains: Scallops (1634 m .), 'Artemision (1771 m), or
Lyrkeio Goupato (1648 m), Armenia (1739 m) and provouno the
(branch) Alisio (Barberis) (1030 m). West in depth facing the mountains
Menalon (1981 m). (In ancient times, MENALO They felt Ostrakina).
There are other peaks, Aydin - Roino (1849) Top Chrepa 1559m)..
closer to the horizon are the nearest mountains or hills: Panigyristra
(743 m) Skalorachi, Koutroulis Gkavezos, SIP (1141 m), Agiannis the
extension until the blocked (a branch of the scallops) and Stochos.Sta
southern horizon is light and view to the Tripolitsa, celebrated by the
Turks and Twenty of the Revolution, while the western skyline
xagnantefoume Mainalo (top Xrepa h.. Ostrakina 1559 and 1981 m).
centered on the town of Arcadia and to the north, a distance of 15 Hilmi
(3 hours walking) is the Town Nestani (ex ÔóéðéáíÜ) province
Mantineias. Going from Tripoli to Nestani pass from Chania purpose
than Mantineiako Basin Vineyards) to get the closed lower basin.
Nestani the right and left of the Argon field, the plain of, (who once
called the Swamp). at an altitude of 636 meters.'s population, once it
reaches 3400 people, but now is reduced to 1 / 3, with continued
reduction due to internal and external migration. With the Argolid
contact imionikous three streets : Scale (Doors) Prinou (Karya) and
Tournikiou. The transportation of highway continues to the Sagas. But
331
now there is a tunnel Artemision, which shortened the communication
and connection with the Argolid and Athens. Also, The new main road
street Nestani - Karya built in 1984 by the MOMA Peloponnese
Elevation Nestani (weighted average) 655 m.
Area of 22 sq. km. km
Arable land 17.5 km ²
Residents in 1961, 1850 and 1971, 2209. Area, hilly ... "
I would like here to point out an omission of the author, probably
unintentionally: The man who personally handled the issue of opening
the road Nestani - Karia, of course, was the commander of the IV
Infantry Division, Major General C. Demosthenes Verros. Yes, my
father was conceived, organized and oversaw the work of the MOMA
(MOMA machine unit was then opened many roads in Greece at the
time). Trying to convince my father to write us, but for the moment,
modest, expects recognition of his work and silence. Maybe someday (I
hope my father is alive then), honored for his contribution to this ... We
said in earlier post that the way Nestani-Karyes Argolis (you know, the
graphic ¨ Kolokotronitsi "the telly" Joy of Coffee "), opened the MOMA.
He was the inspiration of my father, Demosthenes (then General) and
was his own personal supervision and his mochtho.Tin day after
Easter, I got a friend a ride and went to admire the route.
I knew that there's more coming out resources. We met four if I
remember correctly to run enough water. And of course, goes all lost. I
wondered, perhaps as a municipality should do something about it
rather than eat with the Metropolis? Perhaps we can all finally
volepsoume? And water bottling plant and water to the monastery and
to calm down?
4. HEALTH AREAS - RESULTS
To create the patch of Soil Suitability Zones, including the common
areas of individual patches, must be combined patches
332
As seen from the maps below, the appropriate areas for siting the plant, are
scattered throughout the island, most of them located in the northeast and
southwest of the island. The maps that follow show the final proposed sites
based on land use and occupation of land. Watching them carefully, we see
that most proposed sites are covered with grassland and a few
thamnous.Oson to the area they occupy, we see that most sites have an
area of more than 500 acres, which is positive because the optimal
performance of the facility is directly related the area of the region.
Thick slavery in the solar ...
Suppose, say suppose that a new, say from Corinth, using the off plan
property of his grandfather and some of his own funds with small loans are
considered a business opportunity to encourage the Government to establish
a photovoltaic installation. Logical is not it? Let us see the continuity. She
took her new history seriously the government and starts with aspirations to
joining the small and medium sized business of energy. Watch now (but
carefully) what is to happen to the poor man who believed the Greek state
and tell me whether or not the heavy work of "Native Greeks" even the
(otherwise simple) story of photovoltaics.
Deite six "steps of death 'aspirations and expectations of each new or old
businessman who trust the Greek state and the incentive to advertise that,
ultimately, the sole purpose of creating impressions for political exploitation.
* Step One: You need to go to Tripoli to find the Tax Office Paleontology (!!!)
and ask for an opinion that there are no findings of paleontology at the site in
order to be able to create the unit ... (Similar paper is to equip each person in
all regions of the country)
* Step Three: We go to Patras and take the tax office there Antiquities paper
that there are no antiquities in the depths of the land of ... Will you tell me
how to justify these services are functioning and how volepsoume "our
children" in the state. Right. You are right ...
* Step Five: Here things are made from gray, brown and very dark. Why
should I go to Planning permission for solar plant that will create unzoned
city. Moreover, such units are in fact out of plan and not in the draft next
homes, schools and hospitals. But come the Poledomia Corinth (and all
services Planning of the country) have not gotten instructions for licensing
photovoltaic units outside the city plan. We know it's going to get instructions,
a joint ministerial decision of the Ministers of Public Works and Ministry of
333
Development to be issued in 2006 (!!!) when given the number 3468 into law
that is supposed to help in every way those who want to become operators of
alternative energy and specifically solar. Know but expect the decision for 40
months! The same stakeholders. Just wait ... and please Forces service them
find a solution. And here is starting bachalo ... Why do the planning agency
(normally also) that the service is convenient to cover their backs. Other
Housing are asking for environmental permits as factories (thereby reversing
the opinion of the European Union that photovoltaics do not harm the
environment). Others consider solar factories and factory buildings and seek
appropriate papers and studies. Other applications are frozen because they
do not know what to do ... So our new from Corinth wait (along with perhaps
hundreds of others concerned) when it will decide by the Ministry of
Development Ministry to clarify the situation.
* Step six (desperation): The new Corinth frustrated by this situation is trying
the option of also gave the government not to lose the (voter) customer ... It
starts to get permission to install the unit in a large building available within
the project according to the motives of the 3734 Act in force from January
2009 to strengthen (supposedly) related diotikes and other initiatives. What
comes across though? On the Planning Agency to request an environmental
permit because the PV is 21 kilowatts. But you know what is going to tell an
environmental permit to be approved by the Ministry? More or less the unit
should be set up around the moon ... and asks the man. Well, do not tell the
EU that photovoltaics do not harm the environment? Have said Yes to the
European Union. But these are koutofragkoi. We anticipate Ellinares in our
legislation that impacts on the environment not only solar panels up to 20
kilowatts. Since there is more danger and death throughout the world ...
These we believe and if you likes. Furthermore we will set up shops with
"adeioules" and other products trading ... How dare the koutofragkoi also tell
us how we are doing the "work" we ... george.kraloglou @ capital.gr
exactly on this issue have become the first communications while not
subsidizing the purchase of the system has two well.
- Does not open books TEVE etc, is off the electricity bill
- Sell 0.55 euros per kilowatt hour when the parks to sell medium and large
0.45 0.41
- Maximum deployment 10KWp
What areas of the country and what buildings can be installed photovoltaic
systems in accordance with the program of the Ministry of Development;
The program consists of systems to 10 kW, which will be installed in the attic
or roof (including shelters terrace) of buildings used for residential housing or
microenterprises. The program covers the entire country except the non-
connected with the continental system of islands.
Who can install solar system are there conditions?
Right to membership in the program are individuals, not traders and natural
or legal persons traders, classified as micro enterprises (up to 10 people and
up to 2 million per annum turnover) that they hold the space in which installed
photovoltaic system.
For the case of photovoltaic systems in public areas of the building, allowed
the establishment of a single system.
Right to membership in the program are the owners of property represented
by horizontal transmission after the agreement of all owners or one of the
main horizontal property after granting use of public areas from the rest, the
responsibility of the parties.
A prerequisite for joining the program is a link consumption of electricity in
the building where the system is installed.
Furthermore, when the property is installed the system used for housing, is a
prerequisite part of the thermal needs of the building for hot water to cover by
using renewable energy (eg solar thermal, solar water heaters).
How does an agreement of all co-owners or allocation of space in a co-
owner?
Practically unanimous decision of the General Assembly or by written
agreement of all co-owners of the building.
In the old building with no regulation how to install solar?
Again practically unanimous decision of the General Assembly or the written
agreement of all co-owners of the building.
If someone owns the rights to the roof reconstruction (ypsoun), you can
install only the solar system?
No, because the right does not entail a right of exclusive use of the terrace,
which was reconstructed until the floor above, is jointly-owned and shared.
Someone has the right to exclusive use of the terrace. You can install only
the system?
Yes, unless prohibited by explicit provisions. In this case the system will be
connected to the counter (clock) PPC home and the revenue collected by
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him.
What are the procedures to be followed?
To connect the system and sell the energy producer is addressed in the local
PPC signing two respective conventions, one for the installation of the meter
essentially one for the sale of energy.
What happens in regard to taxation?
H low power photovoltaic systems ensures that the generated energy
equivalent to that required to meet the energy needs of the owner of the solar
system. Consequently, there are, for the main solar system, tax liabilities for
the disposal of such energy to the grid.
The citizen producer - consumer will not have tax or insurance requirement
(open book, invoicing, insurance, etc.) or a trader or not.
What happens in relation to Planning? What does work permit small scale?
To install a photovoltaic system requires approval out of the small scale
within the meaning of Article 7 paragraph 1 of Law 3212/2003 (GG A'A 308)
as whenever applicable and statutory instruments issued kat'A authorized to
access. The conditions of establishment will be defined by a circular of the
Ministry.
What is the rate
All the costs are included in the so-called cost per installed kW which is about
5,000 per kW (with good market research can be reduced to 4.000 per kW).
It not only involves the likely cost to insure the equipment against sabotage,
etc. In most cases the equipment is covered by a guarantee of more than 10
years.
What about the electric meter?
We installed a new clock with double meter for output from the facility
operation and disposal. The cost borne by the watch manufacturer, as in all
cases connection to the electricity network, and does not exceed 500.
How is offsetting the value of sold electricity bills with PPC?
The sales proceeds of all energy generated in the network, reducing the
amount of the total electricity bill will be presented to credit electricity bill and
collected by the main system. If the owner of the system is to manage the
building, then the system will be connected to the shared counter (clock) of
PPC and revenue collected by the trustee and distributed according to the
co-owners.
There are installers of solar systems?
The Ministry of Development will be based on the parameters of the technical
people involved in photovoltaics. The integration will be based on a simple
application, but in any case the certification is an important advantage of the
free market.
Is there adequate systems in the market?
Operating around 200 companies. It is important that it is implemented and 5
Greek production units with a production capacity of panels 200 MW.
There is a grant?
Nope. Price sold the electricity network (55 per KWh) is very favorable and
337
does not require grants. Moreover, in this way the citizen enters the process
of preparing documentation, evaluation, authorization, auditing, etc.
Twelve years after the entry into force of Directive 96/92/EC and eight years
after the theoretical release of the electricity market in our country realized
today that there was, until now, the real competition in the production and
supply of electricity to eligible customers only the passage of the 3175/2003
and 3426/2005 which are slightly modified by Law 2773/99. These laws
failed to rectify the shortcomings highlighted today by all sides, but were
designed to meet the varied interests associated with the monopolistic
structure of the electricity sector in Greece. In the summer of 2003,
Parliament passed the new Directive 2003/54/EC, which both repealed
Directive 96/92/EC and also created the conditions for accelerating the
339
process of liberalization of electricity markets in the European Union. In this
presentation analyzes the main problems arising from the requirements of
Directive 2003/54/EC and provides some thoughts on a rational rules that
can lead to an effective and undistorted functioning of the electricity market
in Greece. It should be noted here that the European Commission has
prepared the text of a new, third, a directive, which will replace the 2003/54.
The new Directive, which provides three ways of effective separation of
monopoly activities (transmission and distribution) from competitive
activities (production and marketing) has been discussed twice in the
Council of Ministers of energy and once in Parliament and almost ready to
be introduced to Parliament for final adoption.
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product. This means that where, through a network has the same qualitative
characteristics (eg voltage and frequency) for all consumers regardless of
what is produced energy. So the competition between producers is limited
Σχ.0: Διακύμανση Φορτίου: Θέρος
only at the price of the product without quality criteria exist.
2007- Ιαν. 2009
I. ΘΕΜΑΤΑ ΑΓΟΡΑΣ
341
b1,Q1
In Greek
Π αραγω γοί
wholesale market for Electricity Participants:
Inject The Electricity System¬ Manufacturers and Importers.
¬ The Apomastefontes Electricity from the System Suppliers, Exporters and
Consumers Aftopromithefomenoi.
The Inject submitted for each hour the next day's offerings in the form of
pairs of MW Qi quantity and price in a bi € / MWh. These offers are
classified in ascending order, forming a stepped curve of total bids of the
injected Figure 2. It should be noted that injected into the system compete
with each other and this competition leads to the first selection of the
cheapest deals and also the formation of the System Marginal Price (OTS),
ie the price at which all transactions are in the wholesale market. On the
other hand Apomastefontes energy from the system to buy power OTS and
compete (in Lianemporiki market) trying to attract end users by offering
them with attractive tariffs. It is obvious that gradually these two markets will
ΧΟΝ
be interconnected in the sense that the OTS one will affect the rates offered
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another.
The Daily Energy Planning (IEP) is the first stage of the wholesale market
and has designed the best 24-hour programming of units of production
system taking into account the available energy imports so as to cover a
daily basis) the demand electricity consumers, b) the demand for energy
exports from the country and c) to ensure the most economical way for the
necessary ancillary services. Through the wholesale market transactions
are made in all electricity and ancillary products thereof (Auxiliary Services)
to be produced, consumed, used and / or move the market in each hourly
period of the day.
Solving the IEP specifies how each unit for each hour of the day of
distribution, based on the daily, hour to hour, offers plants to maximize the
Social Surplus (sum of the surplus of the producer and consumer surplus in
Figure 2.) or, more simply, to minimize the total stated in the bidding of
injected, the cost of electricity incurred to satisfy the energy balance, the
need for ancillary services and constraints of the Transportation System
(see Figure 2) . The price at which cleared the purchase of energy required
IEP Price Limit System (OTS), resulting in algorithmic optimization of the
IEP and is a single price at which the suppliers buy energy they expect to
absorb the system and customers which, uniform price paid also injected
into the system manufacturers and importers. Calculate the OTS is shown
with very simplified way in Figure 2 below:
Please note that certain quantities of energy injected offered at zero price in
order to be sure the production and injection into the system. These offers
are called Non-priced offers (MTP) and is usually the amount of energy from
renewables, mandatory Hydroelectric Production, Technical few thermal
units and imports.
Then, the System established by the relevant program of load distribution
units in the system and, based on the program, which can be adjusted
depending on the conditions of the system and availability of production
units in real time gives the necessary mandates for energy production and
provide the necessary ancillary services by plants. In this second phase are
recorded for each unit and each hourly allocation period, the amount of
energy (MWh) that would produce each unit under the command of
distribution, the amount of energy (MWh) actually produce each unit as
recorded in the corresponding energy meters, and the quantities of ancillary
services (MW) provided by each unit as recorded by the System Manager
Energy Control System.
The final phase of the wholesale market include the subsequent liquidation
of the deviation of the market within the calculated limit value of the
deviation (OTA). The OTA estimated a posteriori, taking into account for
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each hour of allocation, the actual produced ischeis production units, the
actual state of the transmission and the actual load of consumers in the
system.
2. Login wholesale and Lianemporikis market.
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It has been shown internationally that if the two markets are interconnected,
that can, under certain conditions lead to disastrous results. In a fully
competitive wholesale market, and its tariffs Lianemporikis Market
management and long-term fixed at constant prices, an increasing disorder
in the wholesale market price eg due to increases in fuel prices, when they
transferred to Lianemporiki market could lead to bankruptcy of the suppliers
involved in Lianemporiki Market. At the same time does not give a
consumer a signal of a crisis (see this California).
345
• The cost of monopoly and thus regulated the activities of the Transmission
and Distribution
• Marketing costs plus a reasonable profit of Suppliers
To realized a long program ofϖ establishment of modern cash hourly
measurements. Hourly measurements will allow the creation of hourly
billings by which the market would pass to consumers directly to the
appropriate signal to the latter, if they choose such a pricing, be pushed to
more rational use and reduce demand during times of peak.
To introduce tariffs to protectϖ producers and suppliers, consumers
against fluctuations in the OTS.
To provide an analysis of theϖ variable cost component of the energy
produced by source of primary energy sources.
The original design of the wholesale market in Greece has not provided a
payment of production beyond the remuneration of injected energy in OTS.
It is known however that electricity is a product which is consumed at the
same time produced. This instant consumption of this product are given
special (instantaneous) value not only to itself the power (in MWh), but in
power (MW) which is available to ensure the validity and the necessary
spare capacity to have continuous supply of safe consumption.
The lack of specific provision for payment of the power available in both the
original Act 2773/99 and the Original code administration and Power
Exchange resulted in a long passive investment rather than the observed
abundance of applications and licensing production to construction. By law
3175/2003 was a first attempt to remedy this problem. Article 23 § 10 of that
Act provided that the offers of producers would "reflect" not now "to the
variable cost of units," but "at least the variable cost of units. Hoped that this
way the producers will give values greater than the variable cost of the units
to cover part or in whole, the fixed investment cost is the cost of power. In
the international literature has shown that where there is competition, bids
are pushed down is made to the variable cost of units.
In Greece today were not created ripe conditions for competition, but the
formerly vertically integrated firm to prevent entry of new producers make
daily offerings to the variable cost of units so as to produce low OTS.
Therefore, the change in the law 3175/2003 was successful. This, when it
became apparent in 2004, led the RAE to propose the establishment of an
interim mechanism to recover the value of the power available with the
introduction of evidence available capacity (ADI). In each ADI by decree,
was given initial value of 35.000 € / MW-year. Each supplier is required to
have sufficient ADI to meet the needs of its customers. The ADI will
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purchase from the producers, who thus will receive the value of the ADI.
The establishment of the ADI in the original price of 35.000 € / MW-year,
created from 2006 onwards, an interest of investors. Furthermore, tendered
HTSO for the construction of the first units of the combined cycle natural
gas as provided by law 3175/2003.
This leads to the conclusion that it is necessary, apart from the introduction
of 35000 € / MW-year (or 70000 € / MW-year in the newly established units
for flexible edge) to establish and further back-up power market mechanism
by which it becomes an hourly basis, the power shortage and given the
appropriate signal to the side of consumption.
The model developed Market summarized above, apart from the problem of
the value of the force that created the problem of long-term investment
standstill, there are some other fundamental weaknesses:
There is a wide range of power (which can reach up to 5800MW, see Figure
4) provided a daily priority, ie outside competition. Tenders were invited to
the Code Management System Non-priced deals. In fact it offers equivalent
power zero (see Figures 2 and 4)
Energy from renewables (mostly wind) should be consumed immediately
because the storage would be cost effective. For this to happen with
certainty, the energy supply from RES as not invoiced is Offer, ie, offered at
zero price.
Similarly to zero offered by Compulsory Hydroelectric Production (due to
irrigation and irrigation needs or due to flood risk) and the Technical
Minimum Thermal non-flexible plants, given the weakness of these units to
cease their operation during night-time minimum load.
Finally a zero value offered amounts imported energy as importers have
already acquired rights to interconnector transmission lines and entered into
binding contracts with manufacturers - Suppliers abroad.
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The introduction of non-priced bids (MTP) is required by the Code
Administration and Power Exchange, but has so far not implemented the
priced Bid led to excesses. As shown in Figure 4, the non-priced Bids, in
some cases reached a total of 5800 MW by setting this way most of the
energy demand outside the competition!
Besides the arbitrary change from time to time "Mandatory Water" has other
implications as shown in Figure 4. Suppose that at some time with load Lo
and Mn priced offers MTPo we Otsu threshold and even the next hour that
are not priced offers increased (MTP1> MTPo) due to increases in
"Mandatory Water. Then, despite the fact that the load increases in L1> Lo
the resulting OTS less OTS1 <Otsu. The phenomenon of greater load to
shorten the System Marginal Price is - therefore - common in the Greek
market and shows that there is a possibility, which manages the water to
manipulate the limit.
From the above analysis of non-priced Bid concluded that, initially, it is
necessary to reduce the "Mandatory Water 'to what is Mandatory and the
reduction of the Minimum Technical Thermal Units, or change the codes by
removing the concept Technical Least of thermal units by creating tough
competition with bids accepted even below cost during the hours of
minimum load, as in many other markets. We must also consider whether it
would be preferable imports to be paid not to the OTS, but
the bid price (pay as bid), which will heal over more severe problem of non-
priced Bid.
Finally, a second phase, when production from renewables has become
very large, should revise the code so, and the production of renewable
energies is the basis of competition ie priced deals.
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€/MWh
CAP
One of the problems created by the fact that each of the small
companies is a unit of a disguised technology (eg combined or
Open Cycle Natural Gas), while the dominant firm has numerous
production units with a wide variety of technologies and fuels
(lignite, oil, natural gas, hydropower, etc.). To understand the
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advantage of dominant companies over small competitors we
believe in Figure 6, two points A and B, of which A has low variable
costs, and B has a relatively high variable costs so that it is usually
limit plant.
Under the rules of the wholesale market and two points A and B will
pay in the OTS. As is readily apparent from Figure 6, Unit B,
marginal unit, receives the value offered by this system to electricity,
which covers the variable costs of assuming the offer is exactly
what the cost. So this unit has room to recover investment costs
and a profit and gain. Instead, the unit A, with low variable costs
equal to the bid, which forms the unpaid-OTS-a surplus sufficient to
cover not only the variable and fixed costs plus profit. If the points A
and B are the same company then a portion of the profit of the unit
A can be used to subsidize the unit B to be covered and fixed cost.
The conclusion drawn from this analysis is that the company has
numerous production units of various technologies has the potential
to subsidize the excess of low-cost variable cost base units, high
variable cost units. Instead, a production company with a single unit,
or more than one, but the same technology units do not have that
option.
This shortcoming can be remedied in two ways. Whether the
measures and incentives for small competitors to gain a similar
range as those plants or forcing the dominant firm to separate
accounts of the plants in a manner that will prevent cross-subsidies
between them.
Finally, it should be noted here that in all the countries which tried to
liberalize the electricity market, asymmetric measures taken to
reduce the initial intrinsic asymmetry in the electricity sector.
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Συσχέτιση Δηλούμενων Προσφορών στον ΗΕΠ και ΕΚΚ
120,0000
Δηλούμενη Προσφορά ΗΕΠ σε €/MWh σε
100,0000
80,0000
60,0000
40,0000
20,0000
0,0000
0,00 2,00 4,00 6,00 8,00 10,00 12,00
Σχ. 7: Ειδική Κατανάλωση Καυσίμου σε GJ/MWh
In the first case the differences in prices for natural gas should be limited so
as not to lead to such distortions. For example, if a generator of electricity is
the prime natural gas purchase contract should be taken to streamline the
contract dispute, either through full liberalization F. Gas, or, if that is not
directly applicable, by imposing administrative measures on the natural gas
monopolist that he would provide the natural gas at the same price to all
producers of electricity. In the second case must be explored trading
behavior of participating producers so as not to favor situations of market
manipulation or distortion of competition.
A measure neutralization of both reasons of market distortion is any plant
considered to be a separate cost center to reflect the total cost, the
investment costs and fuel costs, operation and maintenance. From this
analysis it appears that the revenue from the Daily participation in energy
planning and revenue from the evidence are available, the drive power is
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sufficient to cover these costs, or if a natural gas plant subsidized by
"cheaper" units of the same manufacturer.
Also observed the phenomenon offers are made at a price below those of
peak thermal units thus are led to wastage of water resources. We need to
establish the possibility of a trigger (24-hour) reduction in energy intake of
water resources to cure the problem.
5. Import-Export
Imports, to meet long-term projects that have been agreed and based on
the trading market, interconnections are made with zero. This method
allowed for a (mostly in the summer of 2007) while imports are costing more
and the maximum permissible value (CAP) offers the Greek market (150 € /
MWh) were on no, do not create Limit Pricing System hurting realized these
imports, and it gave the right signal to the daily wholesale market, and
suppliers - Consumers, namely Lianemporiki Market. We must consider the
possibility that the imported quantities of electricity sold in the daily market
price of their offer (pay as bid). If this is flawed or is not desirable from a
regulatory perspective, then, alternatively, should be introduced that offers
imported quantities will not have a value less than the price paid by the
importer abroad. In this case you should describe the procedures for
verification of that claim.
As for exports should be noted that the last 2 years due to very tight
production tools, the System Operator is obliged at certain times not to allow
exports for safe operation of the system. The administration, however, the
export ban is inconsistent with the EU's objective to establish a single
internal electricity market. The correct solution would be to tight production
facilities in the Greek system to speak with an increased price limit system
in order to avoid any interest to buy electricity from the Greek market in
order to export.
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6. Minimum Specifications
Large thermal units (mainly steam turbine) of the Greek system can not
produce stable with an output below a threshold. This limit is called the
Minimum Technical Unit. These same units have the flexibility to switch
when the system load is high, and off when the load is low. Based on the
above describe certain of these units, the night when the load is low, forced
to produce the technical minimum power despite antioikonomikotita
function. This raises the issue of the Technical Minimum. This problem has
many aspects to be reviewed in conjunction with the problem of integration
of available units in the Daily Energy Planning (Unit Commitment). This
trend should be towards the competitive intensity and therefore stronger
variation of the System Marginal Price (OTS) between the hours of low and
high load hours. Sharp decline, for example, OTS noted in low-load hours in
the Italian system so the night be unwarranted imports from Italy and further
exacerbate the least technical of the Greek System.
7. EIA Units
The state, through a series of laws (2244/94, 3468/2006 ....) and to promote
environmentally acceptable units of Renewable Energy, both units were
excluded from the daily competition by allowing them to pre- all units of
other technologies (Non-priced offerings) and also established special
preferential market prices of energy produced from renewables (eg 80 € /
MWh for wind power and 450 € / MWh for solar), while on the third
introduced further motivated by subsidized programs.
8. UPLIFT
All plants involved in the Greek electricity market receive 35.000 € / MW and
year for each MW of available force. With 10.000 MW available in the
system, the amount paid by suppliers annually for this purpose is the order
of 350 million € / year. This amount does not appear in public during the
liquidation of the wholesale market and would normally create an additional
amount (UPLIFT) to be added to the OTS. Generally, any additional
amounts in nature (UPLIFT) created (eg due to pricing of renewable energy
in a predetermined management fixed price) would increase the final OTS.
353
Otherwise, the OTS does not mirror the actual cost of production and does
not give a real signal to consumers to reduce their consumption and
investors to build new plants in the system.
The current legal framework for liberalizing the electricity market based
primarily on the Law 2773/99, which established under Directive 96/92/EC.
The Directive 96/92/EC modified but not repealed by Directive 2003/54/EC
later. Downstream of Directive 2003/54/EC, Laws 3175/2003 and
3426/2005 is not abolished, as were, Law 2773/99, but:
That said, should, whatever final form it will take the 3rd package for the
Liberation of Market Power, to become as soon as possible following
legislative changes:
1. The new draft law should include all articles of the Directive 2003/54/EC,
followed by the corresponding articles of the draft. This will ensure the
completeness of the transposition into Greek law. Any failure to transpose
the directive of an article in the draft law could be justified.
3. Finally, the new draft law should be independent text that the reader has
no need to back to older existing laws.
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Fully competitive when IHI ≤ϖ 1.000
The index is Herfindahl - Hirschman for the wholesale market in Greece has
been calculated in the above table for 2007.
The MIT team building experimental model pyramid to verify the theory of
cement
It is a theory that causes indigestion in dominant class of archaeologists.
Argues that some of the huge boulders of large pyramids of Egypt may have
made from synthetic material, the first concrete history. Do not have a say
latomithei and have put in place by armies of manufacturers. Such a
breakthrough will save millions of tiring worker-hours are supposed to go
into the construction of the enigmatic buildings on the Plateau of Giza.
"It may be used less sweat and more brains," said Linn W. Hobbs, professor
of materials science at the Massachusetts Institute of Technology. "Maybe
the ancient Egyptians were not only left us mysterious monuments and
mummies. You found cement, 2,000 years ago to begin to use the Roman
building projects they did."
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This is an idea that could change dramatically in the history of science of
engineering. Believed for a long time that the Romans were the first to use
cement in building large scale, although such technology is likely to come
from the Greeks. A team of scientists performing material experiments with
pieces of limestone and natural materials association materials should be
readily accessible to the ancient Egyptians. The experiments are designed
to show that the boulders on the highest points of the pyramids may have
been there from a fluid material channeled into wooden molds.
In the MIT Hobbs and two colleagues teach a course on materials used by
humans throughout history. During the years of work, undergraduate
students have the program rebuild from rubble articles like Samurai swords,
bells of Middle America and yet it enjoys a 18-meter bridge constructed of
plant fibers such as those manufactured by the Incas. Now in the laboratory
of Hobbs made a model of a pyramid on a small scale, a structure
composed of limestone latomimeno and artificial boulders made of materials
like cement and mud from the broken limestone that has been enriched with
kaolinite (mineral derived from weathering of feldspar, hydrated aluminum
silicate), silica and natural desert salts like those used by ancient Egyptians
for mummification.
The MIT pyramid will contain only about 280 blocks, compared with 2.3
million who make up the largest of the pyramids. The material resembles
the original gel, but eventually becomes hard like rock. Although the
purpose of the seminar in which the pyramid is constructed to learn the
science of innovation in engineering, the project can demonstrate that the
ancient, at least theoretically, could have built the blocks of the pyramids of
similar material, which could be purchased from dried river beds, desert
sand and quarries .. "Too much too swollen and too many published
research based on the idea that every boulder is carved the pyramid and
not prepared." Manufacturers of Giza koniortopoiousan soft limestone and
mixed with water, hardening the material with natural binders, it was known
that the Egyptians used for the famous blue shiny decorative statuettes
manufactured. Such blocks could have been put in place by workers
pouring wet cement on top of the pyramid, a much less impressive picture of
what is known through Hollywood epic films such as 'Ten Commandments'
noisy misbehaving half naked with thousands of workers to toil with loops,
ropes and rollers to move the giant carved rocks. The Barsoum, professor of
materials engineering, said microscope, the radiographic and chemical
analysis zest stone from the pyramids "suggest that a small but significant
percentage of blocks at the highest points of the pyramids were made from
concrete." He insisted that it believes that the majority of blocks of the
pyramid of Cheops were carved as the archaeologists claim. But 10 or 20
percent of blocks were probably made from some kind of cement, where it
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was extremely difficult to put in full sculptured boulders.
To illuminate the place where they worked, the Egyptians used a system of
shiny plates: they functioned as mirrors, reflecting the rays of the sun.
From the material it was made concluded that the Egyptians probably did
not know how mirrors are made. The plates should be well-polished
material, for example, bronze. A funeral objects found many bronze pieces
that were used as mirrors. Used were also torches that burn oil, which are
removed upon completion of work.
The Pyramids of Giza
Year Built: 2528 BC
Of the seven wonders of the world, only the pyramids of Giza are up to
these days. " Although it has damaged much of the white limestone of the
shell and the surrounding temples were destroyed completely, the height
and size of these huge buildings still impress visitors. The building is
considered one of the greatest achievements in history, and so far the
methods used by ancient craftsmen for the construction of this issue is
causing much controversy. Indeed there are more than 80 pyramids in
Egypt have been built in a period of about 1000 years, but those of Giza are
the largest and most representative because of the stability of their
construction. The Pyramids of Giza were built by three kings of the 4th
Dynasty, by Khufu (aka Cheops), the Khafre (Chephren), and Menkaure
(Mycerinus). The Pyramid of Khufu (2551-2528 BC) is the largest and best
known as the Great Pyramid. For over 4000 years was the tallest
construction in the world
358
. Each pyramid was placed in a fenced area with a temple on the east side.
There was even a temple near the river, which is connected to one another
in a long trail decorated with various reliefs
359
Preparations for the selected location
Very important was the choice of a suitable site for the construction of each
church. The location of Giza apparently chosen because of its strategic
position of the valley Nilou (west side), where the West is the sunset and
death. Moreover, the limestone used in the shell, providing a solid result for
the massive expense of building and also has plenty of material for the
manufacture of solid core. Work on site started in selected infrastructure
projects (excavations, soil formation, etc.). The Egyptians appear to have
used simple tools such as spirit levels on the square smoothing the ground
and thread level. With these tools were able to obtain highly accurate: the
level of the sidewalk around the pyramid of Cheops differs by only 2 cm.
Although the area around the base of the pyramid, dug back and forth to the
feeling of another level, the natural stone inside the perimeter was left intact
to form a solid nucleus at the lower of the tomb.
When the foundation was ready, could begin construction of an exact
square which was the base of the pyramid. Each pyramid was carefully
aligned so that the sides to "see" with the four main orientations. Initially, the
east as the west side was aligned to the north with the help of
constellations. The Egyptians builders were able with great precision, the
sides of the Great Pyramid to deviate from the north on average three
minutes of a degree. When one side is aligned, the rest is constructed from
geometric and marked by tattooing on edafos.Prosfata, there have been
several attempts to apodothei importance to the diagonal placement of the
three pyramids of Giza. It is curious that there was a key priority which is
360
based on this placement. The pyramids were built at different times as
separate works. Also, the areas surrounding the pyramids are not related,
as one would expect. The diagonal placement is a result of the
manufacturing process: the pyramids are closely aligned to the north, and
each one is built sideways on the edge of the site and pulled back from
earlier monuments to a clear view of the constellations of the north. The
boulders used for the base of the Great Pyramid exorrychthikan south of the
pyramid with the same methods used for the construction of trenches
around the Sphinx. The manufacturers felt that the quality of the limestone
was too poor for the shell of the pyramids and so good quality limestone
found in the quarries on the opposite bank of the river, Tura, a port at the
edge of the site. On average, the limestone used, weighing a total of 2.5
tonnes, although the magnitude of construction is reduced to the top. In
addition, blocks of granite transported from Aswan, to emphasize the
external area of landfill and to give the impression that the interior hallways
are impenetrable, so as to deter would-be robbers. Granite used to the
lower area of the shell of the Pyramid of Khafre, as well as the pyramid of
Menkaure. One of the questions open to many different aspects, the method
of elevation of the building blocks of the pyramid. Many different views for
lifting and moving the blocks have been made and more converge on the
following terms: to use some kind of ramp. But in the case of Giza, there is
no evidence of any use ramps. The debris and compact mud used to fill
quarries (after extraction) may be the remnants of them. Entries from other
locations indicate that a number of different ramps used. Different solutions
were given for the transfer of blocks as the work progressed. Approximately
96% of the volume of the pyramid is two-thirds of the lower and the
production of lower levels of several small ramps must be ensured that
blocks the flow of high levels of work done. At the top of the pyramid, the
flow rate was lower because of the difficulty in lifting. At the top anymore,
there was great improvement in the way of lifting and handling.
Each block of stone carvers, when he was already moving in the right place,
so that fits in next to him. The housing blocks are located so close so it is
difficult to see someone jointed together. Mortar of plaster used to fill gaps
that may exist and should also help as a lubricant material to facilitate
placement of ogkolithon.Ta extreme angular parts were those placed first to
ensure that each level was misaligned. The diagonal distances were
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measured to verify that the structure is squared.
Apart from the tunnel, the bandit, the pyramids of Giza remained intact until
362
the Middle Ages, when systematically used as a source for mining. Good
quality limestone was needed for construction work in Cairo and it turned
out easier to make the extraction of the pyramids. A small portion of the
overlap of the peak of the pyramid of Khafre has been left intact.
Continuous observation and excavations continue to provide new
information on manufacturing methods and the people who built these
monuments of great value.
Pyramid of Khufu
Construction period: 23 years
Base Length: 230,33 m
Height: 146,59 m
Slope the sides: 51 ° 50 '40 "
Deviation from the north: 0 ° 3 '6 "
Volume: 2.600.000m ³
Number of blocks: 2300000
Average weight stone block: 2,5 tn
Weight Granite Roof: 50 - 80 tn
Workforce from 20,000 to 30,000
Giza, you can visit the great pyramids belonging to King Cheops, the son of
King Chephren - in which there is even a sarcophagus - and King Mikerino
and smaller pyramids and tombs of other members of the royal family,
nobles and senior officers kings. Many Egyptologist believe that to raise the
blocks to build the pyramids, used ropes and ramps. They argue that
building materials were transported from areas Aswan, Sinai, cake and
Lebanon, through the Nile. Each pyramid has a mortuary, a valley temple
and a causeway leading to the pyramid. Next to the pyramids of King
Cheops and King Cherfen pits where there were boats from cedar, possibly
placed there to carry the Kings in the afterlife.
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The Pyramid of Chephren
King Chephren was the son of King Cheops. Between the 2558 and 2532,
ordered to construct his pyramid beside that of his father. The complex
consists of the Chephren Pyramid, the Sphinx, the mortuary temple and the
Valley. It is the only pyramid that keeps track of the smooth outer surface of
stone on top. Initial height was 143 feet, but because of erosion, now has a
height of 136 meters and its width is estimated at 215 meters. Build with
blocks of limestone and red granite. Inside there is the sarcophagus of the
king of black granite.
The Sphinx
The Sphinx is also one of the landmarks of Egypt. It is made from limestone
and is the head of a Pharaoh - who wears the royal jewels - and the body of
a lion. The Egyptologist argue that it represents the Chephren, due to its
location and its similarity to this King. Created in position to guard the
complex Chefren. Built in 2558 BC to 2535 BC Has a total height of 20 feet,
the face has a width of 6 meters and the body has a length of 57 meters.
Extensive erosion and degradation of the Sphinx is due to poor quality of
the stone, the physical damage, smog and the weather.
Nile found an ancient Egyptian temple entrance
Archaeologists discovered a vestibule (or covered entrance) from an ancient
Egyptian temple beneath the surface of the Nile River. According to experts
one day lead to the entrance to the Temple of the god of fertility Knoum,
who was head of a ram. A team of Egyptian archaeologists, divers found the
vestibule in Aswan investigating in the first underwater test of the Nile,
which began earlier this year. The Nile has moved this part of the church
became part of the river, "said Zahi Hawass, Secretary General of the
Supreme Council of Antiquities in Egypt. Nowadays, the Nile has many
archaeological sites and archaeologists believe that the underwater
excavations will reveal other major articles. The massive vestibule is too
large to move in this excavation, but archaeologists have moved a boulder a
tone that could be from the 22nd Dynasty (945-712 BC) 26th dynasty (664-
525 BC .). The stone itself could be even earlier, however, because as
happens with many objects of Egyptian history, the original materials of the
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temple of Knoum were reused for the construction of more recent temples.
The stones found around the vestibule as it already has moved from the
water, they (most) signs describing the events of antiquity. These
inscriptions could contain a precise dating of a nearby building known as
'counter of the Nile', a platform where ancient officials used to measure
seasonal floods and thereby determine taxes. "In the 'Counter Nile, one
could see the height of the flooding," says von Pilgrim. "And depending on
the height of the flood, one could have predicted how rich would the harvest.
Based on this determined the tax." The Temple of Knoum was a religious,
political, military, commercial and important center of ancient Egypt, added
von Pilgrim. "It was a very important building. Had great importance for the
whole country."
What are Nefelim?
The Nefelim was an antediluvian race which in the Bible referred to as
giants. It was like * aka Tai, children born of the 'daughters if * human
trafficking "and" Sons of God. " It is crucial to note that out almost at the
same time with the * declaration of God that would kill the earth with flood
and it seems from this relation that the * action on the human race was one
of its basic causes * Sicily caused destruction.
We read in Genesis 6:1-7 book
1 When men began to increase number * tion on the earth and cast
daughters
2 The sons of God saw that the daughters of men were beautiful and
married as many of them chose.
3 Then the LORD said, "My Spirit will not * TAKES lished with man forever,
because that is * Tosh Nations. These days it is one hundred and twenty
years. "
4 Nefelim was on earth in those days - and after - when the sons of God
went to the daughters of men and made them children. They were the
heroes from ancient times, men renowned.
5 The LORD saw how great had become the evil man on earth, and that
any available PCI * pseon of his heart was always just evil.
The Nefelim was a race of giants that emerged from the sexual union of the
sons of God (where * angels expelled priate) with the daughters of men.
Translated from the Hebrew texts, the «Nephilim» means "fallen." He was
renowned for their strength, their courage, and a mega capacity throughout
* sins. The origin of Nefelim begins with a story of angels expelled. The
Shemhazai (Semchazai), a senior angel, led a schismatic teams * Group
angels who descended to earth to guide people in the law of the street. The
guidance UT * the continued for several centuries, but soon the angels
began to seek the earthly women. In his eagerness, of the fallen angels
guide * like the women in magic and spells, couple * as them and created
hybrid offspring. The strength was remarkable and enormous appetites.
Having devoured all stocks * the human race began to consume and the
people themselves. The attack Nefelim * dan people and oppress them and
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was the cause of massive destruction on earth. Two essential texts on the
history of Nefelim, the Bible and the Dead Sea Scrolls, mention several
names for them. In various parts presents the different types of these giants.
Reported in many food * foot as Enim, or "terror" (Gen.14: 5, Deft.2: 1st), Re
* phaim, or "those caused Fade" or "The Dead" (2
Sam.23: 13, 1 Chron.1I: 15), Gibborim, or "Giant Heroes" (Job 16:4),
Zamzummim, or '* At tychontes (Deft.2: 10), Anakim, or "long-necked"
(Deft.2 1st, Job 11:22, 14:15) and Awwim or "* In a turn" and "Snakes".
These texts also refer else about * gloves, such as Goliath (2 Sam.21: 19),
a giant with twelve fingers and twelve hands feet, referred to as one from
the Rephaim (2 Sam.21: 20 ), and a tall Egyptian (1 Chron.11: 23). The text
of Numbers 13:26-33 describes Nefelim of Canaan who saw Jesus and later
other Jewish spies. Moreover, according to Judaic lore, someone in the
Nefelim the Arba, built a city, Kiriath Arba, named from its founder and is
now known as the Xe * vrona. The viciousness of Nefelim brought with her
and a ba * pol toll. In Genesis 6:5 refers to * wear life had brought the
Nefelim between humans and themselves: "The Lord saw how great had
been the viciousness of man on earth ... "The evil of rebellion had
revolutionized both the anger and the sorrow of God. So God E * send the
angel Gabriel to ignite a civil war among Nefelim. Chosen also to Enoch, a
fair man, to inform fallen angels by * the decision he had taken them and
their children. God does not leave all the fallen quiet ac * ridiculous, and
could not lift their eyes to heaven, and later was to alysode * thoun. The end
of Nefelim came the war triggered by Gabriel, in which the giants eventually
wiped each other.
The headquarters is located in the Nefelim desert Takla McCann in Xin
Jiang province in North China. Takla McCann name in local language
means tucked in but not going out. So there is an ancient and gigantic
pyramid on top of which once stood the Temple of Baal. Lower, then, this
ancient pyramid called the White Pyramid, there is an underground city that
is called Mach-Tunney in the language of White Nachrmpen mean state.
The White Adelfotato for which and the elders of Mount Athos know is a
point of continuing fascination for the mystic, persistent surprise the
philosopher and continuous embarrassment to the scientist that the most
ancient human edifice on the earth's surface continues to be over an
understanding of the most brilliant analytical minds. We explore the nature
of protoplasm, to draw practical insights from animal structures of DNA and
RNA, the use of coherent laser light to break the man, workshops to launch
into space, yet offers the most ancient technology, the pyramids remain
visible to us riddles, ancient remnants of an era which is beyond all
recollection, beyond history and beyond all understanding. The word
pyramid usually brings to mind a picture of our huge building rising above a
vast sea of sand. These are the pyramids of Egypt. But pyramids have been
discovered in many other parts of the world. Aside from the equally famous
pyramids of Mexico and Central America in the last hundred years have
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reported pyramids at various locations. Most of them were sighted by pilots
flying over uncharted areas during air missions tous.Ena large complex
pyramidal structures with a large pyramid a height of over 300m and
surrounded, miles around, many pyramids with flat peak are all aligned to
the true north is the province of China Sensei several miles west of the
ancient Chinese capital Sianfou, a city older than other Asian Pekino.Mia
pyramid somewhere in the Himalayas Mountains. Called white pyramid and
is described as white color tremolampei. Surrounded by metal or some kind
of stone, with a top plate made of material like a precious gem, perhaps the
crystal. In the jungles of Cambodia are the ancient ruins of the once great
city, which is now known to Angkor, which was beautiful temples, endless
galleries and huge pyramids. The oral tradition passed on by generations of
Cambodian, tells us that it was either work or the Giants-Beyond Eoun,
known as the King of angels. France found a structure resembling a
pyramid. It is believed that this pyramid was built by the Knights Templar
when they returned from the Crusades of the 12th and 13th centuries.
Below is an underground pit with astrological symbols carved on the walls
Silmpery Hill, County Ouister, England, is one of many British pineal hills
Modular gravel pyramids. It is believed that this hill was constructed before
4000 years.Church use of small pyramidal or conical tombs and indicators
for unknown ceremonies, seems to have been widespread in the Western
Hemisphere where, especially in the United States, found many such mini-
pyramids. Rumors circulating for several decades indicate that there are
pyramids in Alaska, in Florida, within the limits of the ¨ well-known Bermuda
Triangle and other parts below the Atlantic Ocean Eiriniko. These rumors
are now dismissed as folklore, may one day receive greater recognition.
Much mystery surrounds the pyramids. Since the riddle as the huge
Egyptian, and Peruvian magianes pyramids and the unexplainable forces
that appear to exist in the pyramidal shape. And perhaps the first mystery of
the pyramid is the origin of the word pyramid. The word PYRAMIS not seem
to come from the MP (pronounced MEP), the Egyptian word for "four-sided
building with triangular sides and square base. The archaeologists have
accepted the word pyramid as a purely Greek word with no known
connection with the Egyptian language. Gerald mache suggests a different
origin of this word in his book "Ancient Egypt". The mache think that the
word pyramid comes from the Greek word FIRE which means 'fire' and HIT
Egyptian word, meaning "ten" or "measure". This argues that this word
means the ten initial steps and arches define the god of fire, the sun in the
zodiac world. Since the Great Pyramids of Giza, among others, seems
constructed in accordance with stellar measurements, this theory is
plausible. Then this word means literally "dekamorfo medium heat" which is
the clear symbolic form of life. The dispute about the origin of the word
pyramid is small with her raging for the purpose of the pyramids. The
Egyptologist claim that the pyramids were tombs. The perouvianistes other
archaeologists do research in Central America report that served as
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churches. And some pyramidologoi now believe that the pyramids might be
or resonator stores energy. There is no doubt that every culture that built
pyramids did this by using very advanced mathematical and astronomical
calculations and a seemingly unlikely perfect learning the art of masonry. In
cultures that are separated not only by thousands of miles, but hundreds of
years, stones weighing many tons, elevated and placed in position with
perfect accuracy, for the construction of pyramid construction. But questions
like "Who built the pyramids?" Or "for more purpose built the pyramids?" Or
"acquired by the manufacturers of highly sophisticated scientific and
astronomical knowledge was used to design these huge structures?" There
are still unanswered.
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remain as the visible covenant between Eternal Wisdom and the world. It is
the first building that serves as a place to preserve the secret truth is sure
foundation of all arts and sciences. Many entered the gates of the Great
Pyramid and came as a god and became enlightened by seniority. The
drama of "second death" was played in the King's chamber, where the
candidate adept symbolically buried in the tomb. Upon completion of the
secret ritual, the mystic was born again, aware of the second birth and a
resident of both worlds. This gain enlightenment and awareness of the
world. The current accumulation of perhaps proves that the great Pyramid of
hiding the secret of a lost art. Does the unknown architects who created all
that survives of the Seven Wonders of the world, knew the universe far
deeper than those that succeeded? The Tompkins in the introduction to his
book states that many elements in the construction of the pyramid were
random. For example, the perfect alignment of bases in the north, or the
application of the structure of the 'p' with decimal precision. It also notes that
in Plato's dialogue "Timaeus", refers to the main compartment as the
structure of the universe. It also says that they gave to chance the fact that
the angles and sloping surfaces of the pyramid show a greater
understanding of trigonometry and the shape are accurately implemented
the basic proportions of the "Golden Section". These and many other
discoveries that then increase, require a new appraisal of the Great Pyramid
and a prosechtikoteri study of history. The idea that the Great Pyramid was
a massive tomb built to satisfy the egotism of a pharaoh is unfounded. One
thing to remember is that I never found mummies in the great pyramid.
Today, the mysteries continue to fascinate and haunt scientists and
scholars. But as anyone to study the Great Pyramid, there are many
unanswered questions. While many looked inside and outside of the
measures, slide rules, chemicals and instruments of any kind, the Great
Pyramid remains a mystery.
MIPOS IS Photovoltaic collectors;
ASVESTOLITHOS QUARTZ crumbled = ENERGY COLLECTION
The etymology of the word pyramid Amish = fire-retardant container. Wrong,
we are only the addition of the Great Pyramid Cheopa.Yparchei in the
region of the Giza pyramid complex of a whole, smaller and unfinished,
others more substantial, they built makeshift klp.yto most important thing is
that they epipedo.Fantasteite in a series of numbers where each number is
the sum of the previous two, namely:
0,1,0 1 = 1, followed by 1 1 = 2.1 2 = 3 = 2 3 5 3 5 = 8 5 8 = 13 so on so we
0,1,1,2,3,5,8 , 13,21,34,55,89 etc.
Arrange now square with sides of length and numbers, which cm
1,1,2,3,5,8,13, measures, etc. If you place them adjacent to a circular
clockwise once formed a "mosaic". Starting from the center (point 0) and
writing a spiral that touches on the sides of the squares, show a beautiful
spiral that "opens" geometrika.An now get an aerial photograph of the
complex of pyramids, you will see that ALL of the pyramids that form the
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speira.Oraia will ask, Where's weird; The strange thing is that this numerical
sequence (again?) Was discovered by Italian mathematician Leonardo
Fibonacci around the 12th century and is widespread in nature such as the
way the petals are arranged in a flower, the distribution of hair on the head,
the shapes of sea shells (shells), etc. And the math of the pyramids does
not end here ...
1) along side base / 25 inches = 365.2421986677311 (deviation from actual
value of 0.08 seconds per year. 25 inches = 63.5 cm and a kyvito = 25
inches because the archaeologists who made the measurements were
English)
2) the width of the chamber of the king to the square root of p = 365.24 ...
3) the perimeter of the base is so many inches and the days a century
(36,549)
4) length height cabin width by King = p
5) or as symbols or geographically, and found the following symbols:
a) the number aktonovolos p (cycle)
b) The natural number e (natural logarithms)
c) the golden number phi (harmonic constant ratio, see human body)
d) the number c (gamma basis functions which describe many natural
phenomena)
e) The imaginary unit i (based on the complex numbers)
f) the number of module 1
g) the number of Chaos 0
h) the symbol exists in the Indian scriptures 3P (Vishnu the preserver)
i) the equation e ^ Epsilon (places of great) 1 = 0 (given by the Swiss
Leonheart Euler, and the kompiouterlakia stick ...)
Many researchers believe that the pyramids (including the Sphinx), built
around 2800 BC and the dynasties of the Pharaohs. But is not it? Probably
not, because lots of discoveries and revelations, we are suggesting that the
pyramids are older than you think. First to say that no text of the Egyptians,
there is nothing on the method of construction of the pyramids. The
Egyptians - assuming it was the manufacturers, would not or could not
explain how construction of the pyramids? My personal opinion is that they
could not explain, since the pyramids of Egypt existed. Mention a few
historians and researchers tell us with certainty the actual time of
construction of the pyramids and potential manufacturers of:
The Arab historian Abu Bachli translating the inscriptions inside the Great
Pyramid, concludes that they were constructed at a time when the
constellation Lyra was in the constellation Cancer, is around 73,000 BC, the
time of the god Uranus. So far, the theories remain open.
The Imp Balousi places the construction of the pyramid, 25000, age of the
god Saturn, the god Hermes, the architect. It is not known the worship of the
Egyptians to the Greek god (and let's remember the Mercury Trismegisto).
Also, Herodotus wrote that the pyramids were built before 11,000 and
finally, the Arabic Al Masood writes that built the Great Sourint (Sirius) to
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10,000.
The great pyramid of Cheops - which is the greatest of all - consists of
2,300,000 blocks of stone weighing from 3 to 18 tons. The cut, but the
boulder is made with iron tools and the Egyptians after the 2800 bronze was
so they could cut the stones. The archaeologist Sir Arthur Evans, who
discovered the palace of Knossos on Crete, said that discoveries found
beneath the palace to assure the use of iron from 10,000 BC by Kourites
Crete.
Also, still remains an enigma, the number of the workforce. The Cheops
reigned for 22 years and 11 months just under the historic built the pyramid
to "reign there after his death, the world of the dead." Assuming that
workers worked 7 days a week and cut 100 blocks a day (!), Then the
cutting of 2,300,000 units will be needed at least 62 years of uninterrupted
work. Cheops ie to prevent the grave, should be cut three times in blocks
three times as many workers!
One explanation that I think the likelihood is not the stones were cut but
were manufactured locally, in large molds. But that requires excellent
knowledge of geometry and chemistry, which at the time of construction of
the pyramids, had just e-llines.
The Greeks were the manufacturers of monuments, as reported, and most
of the "unknown" Multi ancient texts. Known is the case of Thales talk to
him, when he asked the Egyptians to measure the height of the pyramid
because they could not!
Let me add that the name "Egypt" is Greek, derived from the words Aegean
Aegean backstroke ie flat or Aigiis supinely = Egypt ie flat Aigiida. The
Egyptians called their country KEM Ham = Black Earth. For some reason,
however, won the Greek word.
N / A ESTATE OF ARETIS SEMNOTERON, nor confident Estin No property
is semnotero and most certainly by the virtue (ISOCRATIS).
Mipos the Pyramids is the pyramid that we see; What I want to say,
electricity especially loves the pins and just concentrated there, let's say that
the collector collects the power pyramid in the top. And from there; Does the
underground stores batteries; And from there charging huge quartz crystal;
Cases do ... ..
What is common to the Pyramids, L, the pediments of the Parthenon. The
spike. And it sends its energy; If the location of the Great Pyramid valo
Parthenon I can not answer clearly, through the marble columns (which
have crystalline structure) through the earth as the mother of a computer,
receives and sends energy through the legs of the CPU! Are the Pyramids
and the ancient Greek temples computer; Yes my friends ... ... ... ...
Graham Hanckock, Robert Bauval, JAWest, Adrian Gilbert, Colin Wilson,
etc. These are astronomers, geologists, historians, researchers, the myths,
and the important thing is that they have reached similar conclusions about
the age of the Great Pyramid, along different routes. These indeed are
related to the discovery in 1993, a sealed chamber inside the pyramid. (This
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car has not yet opened, having lit the parafilologia about what it may
contain. A great book on the subject is " The secret Chamber "of Robert
Bauval)
Briefly mention that the 1993 Robert Bauval published a book "The Orion
Mystery", which shows a very convincing to someone with knowledge of
astronomy, arguments that the position of the 3 pyramids of Giza are related
with great accuracy with the stars in the constellation of Orion. With the right
software to simulated night sky of ancient Egypt and found that the pyramid-
match Constellation Orion "locked" only dated 10,450 BC Also new from
both geological and astronomical alignments of the Sphinx to the
constellation of Leo, it is an age for the Sphinx by BC 10900-8700 (At the
time of Leo) These and many other elements (which are available on the
links below) agree (if one accepts the course) so the date given by Plato for
the destruction of Poseidon (the last part of Atlantis) in 9600 BC, as the
words of Edward Cayce and Zecharia Sitchin. Because there are many
elements that indicate the specific date of 10,500 BC could assume that this
is the apparent age of the Great Pyramid was built by colonists of Atlantis.
Of course the above theory, the truth is that it takes too much publicity
(some even documentaries have been screened by state television) has led
in recent years stir reactions from classical archaeologist. The curious if it
was the opposite. How can we accept the scientific establishment for many
years to teach everything in human history and prehistory is WRONG? One
rational and I think I may be waiting a sudden BAM, and to reverse the
entire worldview of millions of minds. Even the terrible discoveries of
Copernicus, Bruno and Galileo took centuries to be accepted and paid for
with blood. What can be done gradually in the minds of people to become
more open to new theories can he investigate the truth and not passively
accept that reads the official history books, etc.
"Right as you go from Argos to Epidaurus a structure that resembles a
pyramid and embossed shields depicted the shape of the Argolid shields.
This was the fight against Proetus Acrisius the kingdom, and say that the
match was a draw and we that later reconciled, since neither the one nor
the other could not achieve decisive victory. They say it first collided armed
with shields and they and their troops. For those who fell on both sides
because they were citizens and relatives. was in this Part common grave. "
(Translation Papachatzis Nicholas, ed "Publishing Athens). Several
researchers have given different explanations, others say that the pyramids
were frourarcheia, other Beacon (send light signals), but generally do not
give them special simasia.Mia survey on recently by the Academic
Theoharis on the age pyramid of the Greek, showed that it was built around
2720 BC, namely that it is a few years earlier of the Great Cheops. (Around
170) in the pyramid of Cheops, perhaps the most famous, not a single iota
of legend. Why? It makes sense to build a monument of this size and
grandeur and such does not have a text message anywhere? Katipou say
who, how and why you made this colossal construction? The second thing I
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remember is the following:
In one of the many books I read about this issue states the following. Some
scientists, taking the dimensions of the pyramid of Cheops, built on a much
smaller scale, in order to experiment. Then noticed that he put in the
pyramid a piece of meat, and rotting that with a lot slower than it would
normally happen. And also, when they put inside the pyramid with sharp
objects (shaving blades, knives, etc.) are not only not rust, but became
increasingly sharp. In conclusion I would say that what we do and we must
continue to do on this site, are not necessarily trying to find answers where
none is possible, but as pioneers and seekers of knowledge and truth to
ourselves, to looking particularly think. HRS not know that I know nothing. "
On July 19 every year, many pilgrims climb the trails on both sides of
Taygetos to celebrate the small church of Prophet Elias is on the highest
peak of Mt. By dusk begins to prepare for switching two fire that lit the
pilgrims at designated areas, one to the side of Laconia, one by the side of
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Messinias.Oi fires kept almost the entire night, lit with candles and incense
misoliomena that brings the worshipers. Frankincense melts and slowly
'rolls' for a while, the small openings in the stone circle. Similar fires burn the
villages located on the lower slopes of Mt. Visible but only that of Tseri,
which illuminate a specific point on the edge of the village in the gorge
Viros.
Here is the beginning of the cobbled called "Lewton" which leads into the
gorge. The fire is related to the specific point is visible from the summit,
called "Lewton"? Is it related to the ancient worship of Helios' Sun GF ... 3?
The philologist-historian and writer Mr. Anargyros Koutsilieris believes that
the name is relative to the sun. The researcher and author Mr. Michael
Batsinilas etymology of the "Lewton" or "Lewton" and says: "The first
component is produced by Leo-, indicating that expressed by the second
component belongs or refers to the sun. The second component-the-year
and has roots in the verb istimi and vital tissue. Generally has the effect of
height, heft, raises, etc.
Or is believed that fires up the saw top, were the sparks of the wheels of the
chariot of Helios - Apollo pulled the horses when they flew into the sky? La-
cones (in ancient Greek means rock salt, so the name alone Stone Drift
area indicated in the pyramid of Taygetos, according to author of the article
k.Panagioti Hatziioannou "The pyramids of the Greeks".
http://www.mani.org.gr/taigetos/index.htm From an old article Free Press
1. The Pyramids of Giza are astroglyfika monuments, as has been said
already by renowned researchers and Robert Baubal Graham Hancok,
somewhat similar message Voyager. It has nothing to do with the Pharaoh.
One of the wells leads to a small door. The 10,500 BC and only then
dawned the constellation of Orion and illuminated the entrance of the
alleged (so called by the Egyptologist) fan. Obviously in this entry;; Light
output was probably a statue of Isis or Athena just lit it at the time of the
constellation Leo. For the same reason and the sphinx has the head of a
lion;; marks the sunrise from the constellation of Leo. Based on specific
French criminologist who has representation (sketching) ruled out
pretending to Khafra aigyptiologoi.2 as they say. Around 3000 BC Naxos
stonecutters from port Chofo deaf or with the Minoans built the pyramid of
Cheops. Cheops himself owes its name to the deaf, as stated by other
historians. Around 2500 BC was the dynasty of Naxos in Egypt. One of
them was Cheops. 3. The Max Nordau says that those who built the
pyramid of Cheops were Philistines, that Palestinians and Greeks of Crete.
The Temple of Solomon was later again by Greek colonists. Moses used
Greek stonemason who lived permanently in petra Arabia where he was a
tot Iakhou temple at the foot of Mount Erebus and Eremit in Hebrew. The
church has carved Corinthian columns. It is not excluded with the Naxos
stonecutters have been with them and Corinthians in Corinth because there
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eponymous city of Petra in Arabia. Corinth called hammer of Minyans. The
Minyans colonized Asia from ancient times. And not only;;. A granite
weighing 600 tons moved from Aswan. (If read backwards from right is
Naoussa, as well as the Said is Jupiter, the den is Athens, the Suez is
Zeous;; Zeus). We had high tech to raise such a project. The Bronze Age
this was impossible. Not only the copper and diamond and steel do not
pierce the granite. The diamond lenses and burned. So the other known
metals. 6. It therefore appears that they had superior technology today. A
crane lifts now up to 400 tons. What lifted 600 tons; One hypothesis is
antigravity. We found traces of tubular drills, unidentified metal, pressure
exerted on them 400 tons. Some schemes within the walls of ancient
monuments carved like antigravity generators. However the pitch was
impossible to transfer 600 tons from Aswan (Naoussa) in Giza. The pyramid
had a limestone coating thickness of 3 meters and worked as an antenna
input telouriakon cavity flows with a measure. The Parthenon, in contrast,
emitted energy received and was curved outwards, forming a pyramid.
8. It says as more and more scientists, no one higher than the current
culture before the great flood, probably the Ogygia, perhaps the culture of
Zeus. . We believe it is for the Greeks, because the show all the Greek
names.
Libya = granddaughter of Atlanta
Egypt = grandson Atlanta Inachos descendant of the king of Argos
Io (Isis later) simulated with Athena the Tritonitida.
Apis (from which Appian Peloponnese), king of Arcadia Palantiou
Sir;; = sacred Apis Apis
10. All the Greek cities of mainland Greece and the colonies are gaiodaitika
and forming triangles between them. The position of the Great Pyramid
determined primarily by 2 triangles. One set of lines spaced and Taenarus
Pyramid (Temple of Poseidon, one of the entrances to the public) and
Pyramid Gordios in Asia Minor. The second connects the pyramid with the
highest peak of Mount Ararat (Tartarus if read upside down;; one?? T??
Missing the plurality of Greek dialects. Then the line runs through the city
Zakros (Crete), the latter with east of the Greek colony.
15. The Greeks Pelasgians had spread everywhere and pass on their
language, traditions and customs and the general polismo throughout the
universe. Was knowledgeable of mathematics and astronomy and they
founded cities in gaiodaitiko way. 16. So Athens and the surrounding towns
form the constellation of the Virgin in honor of Athena. The Greek oracles of
Dodona and the top end of the Egyptian Thebes are viewing the Earth in the
constellation Argo. If you view the constellation of Argo on Earth on the
stern of the Greek city of Canopus in northern Egypt and at Dodona we bow
to form the constellation of Argo, the Oracle of Delphi, Tanidos of oaseos
Siu (Shiva) and Dodona. As the Argonauts were the Argo, named
Constellation, and thus the prediction they made in the shape of the
constellation and is not a coincidence because all cities in the world of
Greek colonies, are gaiodaitika.
- The inscriptions have been found since 6000;; 7500 BC India with Greek
letters, and after the so-called Arabic numerals are Greek, as is clear from
the table that the letters written as room 8 and 9 as I understand that we
patronize for Simiton.
5) In addition, Xi Bai Chinese dictionary, which has 24 Latin letters from a
linear description of the Greeks, refutes the theory that we got the letters
from the Semites, because China is most ancient.
The famous Jewish writer Joseph Girachounta shown that the Arabic and
Hebrew is an ancient Greek falsified.
376
Mrs. Karavas by forming an anagram words back to lexicon of Lintel Scott;;
Konstantinidis and find their meaning,
So Melicertes is Heracles, because if you read the end and Child Sigma
occupying the CSCE, is Hercules. So is the Gilgkames Semele, according
to the replacement of vowels based on equity, for example a = e, i = u, o, b
= f, f = p, etc.
Conclusions yours ??.... The lens of NATIONAL GEOGRAPHIC and
channel NOVA Tuesday 17/9/2002 online for Egypt, where
parakououthisoun who are subscribers of channel opening of
ARCHAIOTERIS Sarcophagus WORLD THROUGH discovered in the Great
Pyramid of Cheops. After 4500 years (;) will finally learn what was behind
the mysterious door, which prevented the entrance to the southern part of
the AITHOUSAS VASILISSAS in the Great Pyramid guides viewers to the
two-hour program will be the head of the archaeological research team Dr.
Zahi CHAOUAS in charge of the Egyptian Antiquities and the Giza
Pyramids and permanently explorer of NATIONAL GEOGRAPHIC and the
American achaiologos Dr. MARK LENER, who also belongs to group NG
and expert on the Old Kingdom. A complete and specific katasekefasmeno
robots with special lenses, cameras, high resolution and a smaller radar -
antenna to penetrate the ground, will seek a deeper penetration of the
pyramid than any other attempt has pragmatotpoiithei since chtistike. The
two-hour program entitled: "Egypt - The opening of hidden rooms" and when
that will be used diakrkeia advanced three-dimensional graphics to
represent the evolution of the plateau of Giza, the Great Pyramids and the
Sphinx. The mysterious ruined city of Teotihuacan, the whole universe is
imprinted on the stone. Although its culture influenced Olmekous, Aztecs,
Maya and throughout Central America, the names of the rulers remain
unknown, and their graves were never found. The latest scientific research
use sophisticated technology to detect tousAfta ruins remain mysterious.
The pre-1500 years was bustling city the size of ancient Rome and perhaps
to 200,000 inhabitants, which has survived even a name! The Aztecs, who
discovered the deserted town in the 13th century, wove around their own
myth. They believed that the gods encountered here at regular intervals to
renew the strength of the world, and named Teotihuacan, which in their
language means "place where men became gods."
The strict, almost military precision, symmetry roads and thousands of
residential units is reminiscent of the chessboard, but the researchers did
not find a shred of palaces, pictures or statues of rulers who could shed a
little system of government. Teotihuacan was the first Republic in the
Americas?
Undoubtedly, the center was gifted artists, as witnessed by paintings with
bold colors and hitherto unknown meaning. No documents found
commercial or military, nor any content inscribed column, so the particular
377
culture that has dominated much of modern Mexico between the 3rd and
6th century, is still in the dark. Road crossing 2.5 km as the main axis of the
city. Directed from north to south and slightly to the east and the mental
projection of the result of a recess of the mountain, Cerro Gordo, which was
considered a sacred place. The Aztecs called the "Highway of Death"-the
name is still preserved. On the north side dominated the Pyramid of the
Moon, on the east rises the imposing Pyramid of the Sun Square, of larger
buildings from antiquity. With a height of 65 m, constructed from 'tezontle "-
red volcanic rock, red coating, competes in size the pyramid of Cheops and
within the archaeologists found tunnels and caverns, nor a sign of rituals.
Recent article on the website of the German "Spiegel" reported that the
secret of this giant pyramid is probably the key to the mystery of the city.
The building is located right in the center of Teotihuacan, which is no
coincidence. Measures length of that time was unknown, the researchers
devised the Teotihuacan Measurment Unit (TMU) -83 cm, and continuing
counts resulted in a single number that consistently dominate throughout
the city: 584 TMU-which is the exact number of days in the calendar of
Venus! "Obviously, the city was built to symbolize specific dimensions of
space and time," explains Sampouro Sougkigiama after years of research at
Teotihuacan. During the Japanese archaeologist, "as the capture of the city
was an unusual" kosmogramma "and sought to radiation of social power
and its exploitation for political purposes." Further measurements showed
that the architecture played an important role numeric combinations and the
solar calendar of 365 days and the ritual of 260 days upon which the
organization of secular and spiritual lives of all great civilizations of Central
America. Nowhere, however, the calendar authorities did not comply with
such thoroughness as architecture in this town, 50 km north of the Mexican
capital. Teotihuacan was the source of all these cultures, which were
developed in succession until the arrival of the Spaniards? Is raised for the
foundation of mathematics and astronomical observations of neighboring
Maya? The 80s, S. Sougkigiama with the American J. Kaoutzil and Mexican
R. Kamprera identified in the Pyramid "winged snake" (which was
worshiped as the god Quetzalcoatl) skeletons of people who quite obviously
stretches did not die a natural death, placed in groups of symbolic figures.
The "Winged Serpent" is a unique mythical creature that gave people the
time-diary form, and limited space, this world. The code «chimalpopoca»-
main source of current knowledge about the mythology of the Aztecs,
Quetzalcoatl descends into groundwater, wrestling with chthonic gods and
returned victorious. The cultural influence of Teotihuacan has spread
throughout the centuries in Central America and, as mentioned in "Nationals
Tzeografik" - traces found in ceramics, illustration and architecture of many
cities in the Mayan-Frigate (Honduras), Tikal and the Kaminalgiouchou
( Guatemala) and many ereipiones the Yucatan. According to a report of
378
"Frankfourter Algkemaine, physicists at the National Autonomous University
of Mexico assemble inside the Pyramid of the Sun the largest subatomic
particle detector, designed to identify burial chambers that may lie within.
According to project leader, Dr. Arturo Menkaka "is propatheia identify
variations in density pyramid. The cosmic rays penetrate everywhere, and
the amount absorbed depends on what is encountered in their path.
Identifying more than expected myonion-related subatomic particles of
electrons produced by the collision of cosmic particles with air molecules, it
would indicate the existence of holes. When the myonia, moving close to
light speed, encounter a barrier material, most of the cross, but some
characteristics are absorbed and leave traces recorded in the detector. Do
you think there is some truth when he said that it will soon come a time
when the Atlantis will emerge and how to find the Lost Hall of time under the
feet of the Egyptian Sphinx? Now opened a big business with Casey
because it goes to the world of metaphysics . I'll say a few words to
understand and the world. The Casey was an American therapist and had
the ability to state aftoupnosis make diagnoses for diseases of its own and
other people who came to ask for help and he actually gave treatments that
were medically bizarre but effective. (End of a side). The Kefs his entire life
giving dictations to people experiencing a problem. But he believed in
reincarnation, past lives often describe people here on Earth that reached
up to 50,000 years ago and who thus lived in a country of Eden called
Atlantis. Of the many prompts given for different people, found that about
700 of them had incarnations in Atlantis affecting their current lives. Through
these life dictates that Casey analyzed fully described the Atlantis, has its
place in the Atlantic, the islands which were, their names, described the
inhabitants of the riots and described the destruction of Atlantis. According
to his theory, many entities that had one or more incarnations in Atlantis,
you embody back to Earth in this century and especially in America. Many
of the prompts, but found true. In a prompt say made in 1940 Kefs predicted
that parts of Atlantis will emerge around 1968-69. Indeed, in 1968 found the
submarine Cyclopean walls on the island Bimini in the Bahamas. This event
is the Kefs shocking and should be analyzed according to findings of
genetics, and biology. What these findings say? That primordial memory
and consciousness, collective consciousness that becomes a man, that the
memory of our forefathers commonly recorded in the core of human DNA
and is inherited in subsequent generations. The Kefs believe that managed
to arouse the collective memory of its lethargy. I think the discovery of
Atlantis Kefs will prove the true prophet.
20. 'Ara will discover the Hall of time?
In many dictates of the Kefs says the Atlantic before the disaster, they
moved their records in Egypt and in two other places to preserve and that
someday will be found. Specifically, in a prompt saying that the hall of
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records is located between the Sphinx and River. Another says that the
room is in the passageway between the Sphinx and the Pyramid of the files.
At this point, however, between the Sphinx and the river, the Nile was
formerly closer to the Sphinx than it is now, not yet found the files. However,
indicated that the records preserved in other places, like somewhere in the
Yucatan peninsula but also in itself Atlantis sunk and records will be when
they investigated this point. Now these are real memories from the
registered information of the human DNA or misinformation? Nobody
knows. I think it has not yet been a problem. Time will tell. 21. About what is
recorded by Plato for Atlantis in his works, considered to be accurate and
historically true or it is a symbolic story, a social - psychological allegory? I
think it is accurate. I will not dwell much on the subject because it has been
much discussed, but with a few words to have a geographical description of
Plato, the form and shape of Hercules, on some parts of the Atlantic and a
new continent, in addition to Atlantis, not specified . Furthermore, references
to Plato is certainly an element in my research, but not more serious.
However I can not imagine that Plato fooled the world and give an answer to
those who say that what Plato says not really. What was Plato? No crook?
Let's get it but from another angle. Suppose that Plato did not say all this
story that we did not know anything about Atlantis by the writings of Plato.
Will again today looking for the existence of an antediluvian civilization?
There are many signs around the world, many unexplained results and
events, reports and myths that we did. Just Plato gave us the name of
culture and our orientation. Moreover, as we said earlier there were reports
of Atlantis by Plato
22. There are descendants of Atlanta today?
Yes, I believe it exists. There are certain breeds that I mention. Are the
Basques of Spain, who inhabit the Pyrenees mountains. They differ from
their neighbors in appearance and language, and even the Basque
language is unique in Western Europe is not an Aryan language. The
Canary islanders, who have little resemblance to any other African tribe and
used to mummify their dead. Other tribes are the Berbers of North Africa
have influenced dialect the word "Atlas" and a small, relatively unknown
breed, the dogs, who live in southern Mali, West Africa. They love it even
now Sirius have astronomical knowledge and say that descended from the
Berbers, but they clearly state that descend from the 'Atlantic. Also, I think
the tribes descended from the 'Atlantic should sygkatalexoume and
American Indians and other tribes that do not have my mind. The Greeks? I
can respond to this issue because there are many intermarriage ... The
Greeks built their own culture and many things may have influences.
However, there are influences from the Atlantis in the Aegean, a tradition,
mythology ... Do not forget that Zeus was born in a mountain of Crete, Rhea
got to save him from Kronos, who lived on an island in the Atlantic and ate
380
their children. For this and Rhea went to Crete where Zeus was born, far
from Saturn. Also, the cult of the twelve gods of Crete began, the traditions
of Crete, the bull, etc. associated with the traditions of Atlanta. Correlation
between the two cultures is but the Greeks built their own culture, there
were many intermingling .. Maybe the culture is to overshadow the influence
of Atlanta and was not able to answer with certainty whether the Greeks are
descendants of Atlanta or not.
You may wonder whether the trouble re doing a little; We started the
installation of photovoltaic and discuss whether the Greeks were
descendants of Atlanta;
But my friends from the atlas began photovoltaic technology. He and the
nefelim built huge pyramids onazoumimera collectors, fire = fire + Amish +
container = collector of fire or fire power if you prefer. There are a funerary
monuments amides egopathon kings while vasilevan diletaxan 30 years to
build the mausoleum construction have required 130 years with
conventional technology or a few months antiovarytitas technology.
We moved the rocks amid the desert, the kalouposan there simply
And the pyramids themselves were merely a mass of stone, like Unused
skeleton bones in the middle of the desert. Or another tool that did all the
work. The coating. For koitte the tall white pyramid shining like a jewel
understand what I say. The coating of the pyramids were silicon, crystalline
material, so now they put in photovoltaic panels
Just buried there the kings to the place sacred to the people not to go and
look in there, the evil nefelim Anounaki.
They gather the pyramids and the energy apokefan serasties ATAPI
underground. Of these riders and found that the bulbs inside.
Looking at the Giza piramida what many see as a pyramid in the middle of
the desert. I see a wreck Elgin sand. The reverse a pyramid above the
columns of the Parthenon. A solar collector We read the summary of a
patented photovoltaic collector to understand.
As the photovoltaic panels made of silicon etes you say, one that is cheap
and is in great quantity, rather than the crystalline material that could
chridimopoiithei Marble and this is crystalline. Marmo high purity such as
Pentelic marble. The mystery begins to drift away over the Penteli. The
Ancient Greek marble chrisimopoiousan Penteli and Thassos had increased
purity because the collectors of the same can we do now
Of course it is funny to dress the windows of houses where we ftovoltaikous
to plastering with stucco and to transform themselves to collectors, do not
agree; So outdated technology of thin film let us take the next step is the T-
P L A S A N A S
The stadium was built in Taiwan for the World Games 2009. In 8844 the
roof installed photovoltaic panels capable of producing just over 1 Gigawatt /
h per year!
Besides its own needs, cover the needs for electricity of 80% of buildings in
the area! Very nice design and perfect example (aesthetically) correct
application of photovoltaics in building
385
Φωτοβολταικα στα σπιτια
Που επιτρέπεται
386
Ένα KWp κοστίζει περίπου 5.000 ευρώ τελική τιμή μαζί με τα έξοδα
τοποθέτησης κ.λπ. και παράγει περίπου 1.200 KWh ανά έτος (λίγο
χαμηλότερα στη βόρεια Ελλάδα, λίγο περισσότερο στη νότια). Έτσι λοιπόν
θα αποδίδει στον ιδιοκτήτη περίπου 660 ευρώ ετησίως. Άρα λοιπόν με
φωτοβολταϊκή εγκατάσταση 5 KWp (κόστος 25.000 ευρώ) τα έσοδα θα
είναι περίπου 3.300 ευρώ ετησίως και με εγκατάσταση 10 KWp (κόστος
50.000 ευρώ) τα έσοδα θα είναι περίπου 6.600 ερώ ετησίως. Η απόσβεση
γίνεται λοιπόν σε περίπου 7-8 χρόνια. Από τα έσοδα αυτά βέβαια θα
αφαιρεί η ΔΕΗ το κόστος της κατανάλωσης ρεύματος του σπιτιού (το οποίο
όπως είπαμε το χρεώνει με χαμηλότερη τιμή, σήμερα γύρω στα 0,12 ευρώ
κατά Μ.Ο.) και το υπόλοιπο θα κατατίθεται σε λογαριασμό του
δικαιούχου.Πέρα από την ελκυστική τιμή αγοράς του παραγόμενου
ρεύματος, δεν υπάρχει επιδότηση αγοράς εξοπλισμού. Ήδη όμως κάποιες
τράπεζες προσφέρουν "πράσινα" ή "οικολογικά" κλπ δάνεια με
ευνοϊκότερους όρους. Εγώ θα προτιμούσα πάντως ένα μικρότερο (άρα
φθηνότερο) φωτοβολταϊκό σύστημα, παρά ένα μεγαλύτερο (άρα
ακριβότερο) σύστημα με δάνειο από τράπεζα...
Μείωσε τον επόμενο λογαριασμό ρεύματος κατά 61,56 Ευρώ!
Καλό είναι να έχουμε ηλιακό θερμοσίφωνα. Όπως και να έχει όμως, μια
κακή συνήθεια που έχουμε πολλοί είναι να ανάβουμε το θερμοσίφωνα και
να τον ξεχνάμε για αρκετή ώρα... Ανάλογα με το θερμοσίφωνα (και τη
ρύθμιση του θερμοστάτη) ένας ηλεκτρικός θερμοσίφωνας θα χρειαστεί
κάποια συγκεκριμένη ώρα για να ζεστάνει το νερό στη θερμοκρασία που
θέλουμε. Είναι το σημείο εκείνο στο οποίο θα σβήσει το πορτοκαλί
λαμπάκι! Αν τον αφήσουμε ανοικτό περισσότερη ώρα, το μόνο που γίνεται
είναι το εξής: Το νερό αρχίζει πάλι να κρυώνει λίγο μέχρι να πέσει κάτω
από τη θερμοκρασία του θερμοστάτη, για να ανάψει ξανά το πορτοκαλί
λαμπάκι και να αρχίσει πάλι η αντίσταση να τραβά ρεύμα για να
ξαναζεστάνει το νερό στη θερμοκρασία που έτσι κι αλλιώς είχε φθάσει
πριν!
Περισσότερη κατανάλωση ρεύματος για το ίδιο αποτέλεσμα δηλαδή! Το
νερό δεν πρόκειται να γίνει πιο ζεστό, ούτε θα ζεστάνουμε περισσότερα
λίτρα αφού η χωρητικότητα σε λίτρα του κάθε θερμοσίφωνα είναι
δεδομένη. Και μην ξεχνάμε ότι ο ηλεκτρικός θερμοσίφωνας έχει τη
388
μεγαλύτερη κατανάλωση σε Watt από όλες τις συσκευές ενός σπιτιού:
Συνήθως 4.000 Watt! Ανάβουμε λοιπόν το θερμοσίφωνα λίγο πριν
χρειαστούμε το ζεστό νερό. Μπαίνουμε στο μπάνιο μόλις σβήσει το
λαμπάκι ή λίγο μετά. Για το πλύσιμο των πιάτων κ.λπ. χρησιμοποιούμε
ειδικούς μικρούς θερμαντήρες νερού: Δεν χρειάζεται να ζεστάνουμε 200
λίτρα ενώ χρειαζόμαστε μόνο 10! Και φυσικά αν μπορούμε,
εγκαθιστούμε ηλιακό θερμοσίφωνα.
Αν λοιπόν αφήσουμε το πορτοκαλί λαμπάκι να ανάψει ξανά μερικές φορές
για 10 λεπτά κάθε φορά, θα έχουμε καταναλώσει, χωρίς κανένα λόγο,
μέχρι και 2KWh κάθε μέρα, δηλαδή 240KWh σε κάθε λογαριασμό
ρεύματος, ή 28,80 Ευρώ!
Αν κάνουμε καθημερινή συνήθεια την προηγούμενη τακτική, θα
εξοικονομήσουμε περίπου 28,80 Ευρώ από κάθε λογαριασμό.
Γι' αυτό παρακολουθούμε την πορεία ψησίματος από το τζάμι της πόρτας
της και δεν την ανοιγοκλείνουμε συνεχώς για να παρακολουθήσουμε
καλύτερα το... έργο.
Κάθε φορά που ανοίγουμε την πόρτα του φούρνου χάνεται σχεδόν το 1/3
της θερμότητας. Θα χρειαστεί λοιπόν να καταναλώσει περισσότερο ρεύμα
για να ξαναφθάσει τη θερμοκρασία που είχε πριν ανοίξουμε για λίγο την
πόρτα (εξοικονόμηση έως 200Wh ανά ψήσιμο)!
Όταν καταλάβουμε ότι το φαγητό είναι σχεδόν έτοιμο, κλείνουμε το
διακόπτη θερμοκρασίας λίγα λεπτά νωρίτερα. Η θερμοκρασία που έχει ήδη
αναπτυχθεί, θα συνεχίζει να ψήνει το φαγητό για άλλα 10-15 λεπτά
(εξοικονόμηση έως 300Wh ανά ψήσιμο).
Ο φούρνος καταναλώνει περίπου 2.500W ανά ώρα, ενώ ο φούρνος
μικροκυμάτων 800W. Δεν ζεσταίνουμε λοιπόν έτοιμο φαγητό στο φούρνο,
αλλά στα μικροκύματα. 15 λεπτά στο φούρνο ισοδυναμούν με κατανάλωση
περίπου 500Wh, ενώ το ίδιο αποτέλεσμα με το φούρνο μικροκυμάτων θα
το πετυχαίναμε με 5 λεπτά ή 60Wh (εξοικονόμηση περίπου 450Wh ανά
ζέσταμα).
Αν λοιπόν ψήναμε στο φούρνο 4 φορές την εβδομάδα και ταυτόχρονα τον
χρησιμοποιούσαμε για ζέσταμα ή ξεπάγωμα άλλες 4-5 φορές μπορούμε να
εξοικονομήσουμε σχεδόν 4.500Wh (4,5KWh) την εβδομάδα, δηλαδή
72KWh ή 8,65 Ευρώ σε κάθε λογαριασμό ρεύματος!
Συμπέρασμα:
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Είδαμε ότι μόνο με τις παραπάνω τρεις κινήσεις, μειώνουμε την
κατανάλωση κατά 513KWh ή 61,56 Ευρώ σε κάθε λογαριασμό ρεύματος
σε ένα σπίτι σαν αυτό του παραδείγματος!
Σε ένα έτος, η οικονομία είναι πάνω από 1.500KWh που συνεπάγεται
αποφυγή έκλυσης περισσότερων των 1.000 κιλών διοξειδίου του άνθρακα
στο περιβάλλον. Τόσο διοξείδιο του άνθρακα θα παρήγαγε η ΔΕΗ για να
μας παρέχει αυτές τις παραπάνω 1.500KWh κάθε έτος. Το ισοδύναμο
αποτέλεσμα που θα πετυχαίναμε φυτεύοντας πάνω από 20 δέντρα έξω
από το σπίτι μας!
Κι αυτά χωρίς να έχουμε υπολογίσει καθόλου τη χρήση φωτοβολταϊκών.
Αν εγκαταστήσουμε και 1.200Wp σε φωτοβολταϊκά, εξοικονομούμε άλλες
1.500KWh και είναι σα να φυτέψαμε άλλα 20 δέντρα ακόμη!
Υπάρχουν και πολλοί άλλοι τρόποι με τους οποίους μπορούμε να
μειώσουμε την κατανάλωση ρεύματος και έτσι να συμβάλλουμε στην
προστασία του περιβάλλοντος με επιπλέον ανταμοιβή την εξοικονόμηση
χρημάτων:
1. Κλείνουμε την τηλεόραση, το DVD, τον Η/Υ κ.λπ. από τον κεντρικό
διακόπτη και όχι από το κόκκινο κουμπί του τηλεκοντρόλ (ή σε
αναμονή).
2. Δεν ανοίγουμε συχνά και για πολύ ώρα την πόρτα του ψυγείου.
Κάθε φορά που το κάνουμε αυτό, χάνεται σχεδόν το 1/3 της ψύξης
και το μοτέρ του θα καταναλώσει επιπλέον ρεύμα για να φέρει
ξανά τη θερμοκρασία στο προηγούμενο επίπεδο.
3. Τοποθετούμε το ψυγείο σε δροσερό σημείο του σπιτιού, μακριά
από καλοριφέρ και παράθυρα ή σημεία που βλέπει ο ήλιος.
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Φόρτιση μπαταριών
Για να φορτίζει μια μπαταρία από τον ήλιο, πρέπει να της δίνουμε περίπου
20% παραπάνω τάση (βολτ) από την ονομαστική της. Έτσι, μια μπαταρία
12V θα αρχίσει να φορτίζει με τάση πάνω από 14,4. Μια μπαταρία 3V με
τάση πάνω από 3,6 κλπ.Με τα φωτοβολταϊκά μπορούμε να τροφοδοτούμε
απ' ευθείας τις συσκευές όσο υπάρχει ηλιοφάνεια, δεν συνηθίζεται όμως.
Συνήθως φορτίζουμε με το φωτοβολταϊκό μια επαναφορτιζόμενη μπαταρία
και οι συσκευές λειτουργούν με ρεύμα που παίρνουν από τη μπαταρία. Το
φωτοβολταϊκό φροντίζει να αναπληρώνει κάθε μέρα την κατανάλωση σε
Watt που έκαναν οι συσκευές.
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Στο παραπάνω σχεδιάγραμμα απεικονίζεται η συνδεσμολογία ενός απλού
φωτοβολταϊκού συστήματος. Ο ρυθμιστής φόρτισης φροντίζει για την
σωστή φόρτιση της μπαταρίας. Ο inverter μετατρέπει τα 12 βολτ της
μπαταρίας, σε 220 βολτ για να μπορούμε να συνδέσουμε πάνω του
συσκευές που απαιτούν τάση 220V.
Ένα φωτοβολταικο θα παράγει κάθε μέρα την ονοματική ισχύ του επί 6 το
καλοκαίρι και επί 3,5 το χειμώνα. Έτσι, από ένα φωτοβολταικο 100Wp
μπορούμε να αναμένουμε 550-600 Watt/h (0,6 KWh-κιλοβατώρες) το
καλοκαίρι και περίπου 350 Wh (0,35 KWh) το χειμώνα, ανά ημέρα και κατά
μέσο όρο.
Δηλαδή το χειμώνα, δεν θα παράγει 350 Wh ΚΑΘΕ μέρα, αλλά αν
διαιρέσουμε την συνολική μηνιαία του παραγωγή σε KWh (πχ. τον
Δεκέμβριο) δια 31, θα μας δώσει τον αριθμό 0,35 KWh.
Ανά 1.000 Watt/p φωτοβολταϊκών, η συνολική ετήσια παραγωγή σε
κιλοβατώρες (KWh) θα είναι από 1100 KWh (βόρεια Ελλάδα) έως 1450 Kwh
(νότια Ελλάδα). Έτσι, ένα πάνελ 100 Wp θα παράγει από 110 Kwh έως 140
Kwh το χρόνο.
Αστείες φωτογραφίες με φωτοβολταϊκά
Energyres 2008
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Η έκθεση για τις Ανανεώσιμες Πηγές Ενέργειας και τα φωτοβολταϊκά
The energy accumulated during the day from the sun, stored for the night in
a special accumulator (battery) 12V, suitable for solar energy applications. It
could be used even as a large batteries for caravans or sea craft. The
battery has a capacity large enough to supply the lamps with electricity for
several nights, even if we have a few days without any iliofaneia.Oi different
from a normal system powered by the electricity network. found in three
points:
1. In fluorescent lights installed instead of incandescent 12V 230V.
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2. Cables used in more cross links (thicker).
3. The system does not have the clock electricity, but an accumulator
(battery) which is recharged by a solar panel.
For every 4-5 lights require a panel of about 130Wp, an accumulator
(battery) capacity of about 150AI and a charge controller to battery.
Between the battery and lighting installed and insurance. The cost of such a
system is about 1200 Euros.
Because solar energy, such a system with 15 lighting means to prevent
release of 500 kilograms of carbon dioxide into the atmosphere each year.
Equivalents like to plant another 10 trees in our garden!
The brightness of bulbs for energy-saving 12V 9W, for example,
corresponds to that of conventional incandescent lamps 40W, thus ensuring
very good lighting garden.
A key advantage of this solution is that the fixtures can be placed anywhere,
since only the solar panels need to be placed at a point to see directly the
sun most of the day.
In contrast to simple independent garden lights intended more for decorative
lighting.
Off-grid solar garden lights
The small autonomous solar lights used for decorative lighting, lamps,
because instead of using one or more led.
But they have other advantages such as:
1. No need wiring. Each lamp is built and solar cells and rechargeable
batteries needed.
2. Are cheaper. The average price of a solar lamp is about 20 Euros, which
means about 100 Euros Place 4-5 lights.
3. No need to install an electrician. The metal under the sink very easily on
the ground, in places, but to see the sunlight most of the day.
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The more led shine in any light, so intense is the light.
In no case, however, can illuminate an area such as light bulbs and 7W 9W.
It is intended more for decorative lighting or to illuminate a hallway, etc.
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It will be a conversion kit that could find application in other uses:
1. Lighting billboard advertising
2. Lights on the balcony
3. Indoor Lighting (warehouse, small room, Light Box, etc).
Construction
The only materials needed are:
2. The powerful luxeon led 1W
3. A three compartment three batteries with rechargeable batteries 2000-
3000mA
4. Two small photovoltaic panelakia almost 6V
5. A bracket of the photovoltaic (I used a wall bracket for a small speaker,
but would do and a simple wooden pasalaki or a small piece of sheet metal)
I put them all in a waterproof plastic electrical box, which had opened a
small hole for projecting the photoresists of the electronic circuit board
(PCB) and another one to come out the wires going to the lamp and led to
PV. The board - night sensor, the photoresists understands the darkness to
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automatically turn on the lamp. Similarly understands and daylight to turn off
the light. The sensor night was the hardest part, after the market offered
only to 12V, while the kit needs to 3,6 V. Okay, just looked and found how to
convert a kyklomataki 12V to 3,6 V (once I get some time to convert some
friends and not electronic) ...
The photograph shows the final installation. The box containing the light kit
fastened to the back of the photovoltaic element. The lamp led light coming
into the outer space from a hole that opened at the top, as shown in next
photo (the kit could be put in and the light for not shown). Insulation gaps
with silicone to protect from the rain.
His performance is more than adequate, and illuminate for many hours at
night, those were the peak hours of sunshine a day and a bit more!
If that is a summer day saw 6 hours of intense sunshine will glow for about
8-10 hours a night. The winter count to work for about 6-7 hours a night.
The photovoltaic panels instead of inserted at the top of the lamp could be
placed lower, for example based on a piece of sheet metal in the base of
the lamp, or beside the lamp on a wooden or metal pasalaki.
Other uses of lighting kit
As mentioned above, lighting kit can be used elsewhere. With 3 kit (without
natural light metal) placed next to each other on an elongated plastic, wood
or aluminum base, can illuminate an advertising billboard. With 3 or 4 kits
can illuminate even a small room or store! In the latter case not even need a
board-sensor night, since we can turn on a switch (and thus greatly
reducing the cost).
The cost for the entire lighting kit
7.00 Euros luxeon led
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12.00 Euro plate sensor night
28.00 Euro PV
Total 47.00 euros. Other cost me 9.00 euros in outdoor lighting. With less
than 450 euros to say, I'll post 8 solar garden lights that do work! An
electrician would ask about 2,000 euros, not counting the electricity bill and
the table or the clock, like digging in the garden ...
I do and good for the environment. And if need be in no blackout, bring 2-3
of these solar lights in the house ...!
Powerful solar garden lights
A simple and economic construction for strong solar garden lights with solar
Here you will see how a very simple way (and very economical) to illuminate
your garden or balcony with our free energy from the sun! The solution is so
simple that literally can implement each ...
Let's start with the problem: In ordinary commerce solutions have the
following problems:
1. There are cheap solar garden light, but shine less and a candle ....
2. There are some solar lights that are relatively strong but is very
expensive (around 100 euros each), since it requires several strong solar
panelakia (one on each lamp) which is expensive and often ugly because of
their size.
3. Finally, there is the most expensive option (over 1,000 million) in ordinary
garden lights with energy saving bulbs instead powered by the electricity
network, connected to a central powerful - and expensive - a large solar
panel and battery (because of high consumption due to multiple lamps even
run for several hours each evening).
The best solution therefore would be the 3rd of these, provided they do not
require large solar panels and large battery (battery) is very expensive ... So
we need to reduce power consumption by using even lower power bulb. In
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the photo below we see a spot that lights 12V 18 led by consumption and is
only 1,3 Watt at 12V (four times lower than that of smaller energy-saving
lamp)!
Then purchased four of these garden lights traded. All are appropriate, no
matter if it is solar lighting or usual for the electricity network. Simply place a
normal light bulb located in the the above spots such as the following
photos:
I prepared so all four lights. At the end located at the top of all the lighting
and the end result is flawless and professionally: As we see in the picture
above, the specific exit at the bottom of each lantern come two wires - one
black and one red (negative and positive respectively).
The cable connections for lighting, battery and the photovoltaic charge
regulator
All black (negative) wires connected to the lighting of the corresponding slot
loading control (marked with - minus). All the red (positive) wires connected
to the corresponding slot loading control (marked with a + co), as in the
photo below the two slots on the right to charge regulator:
Of the two slots in the messaies charge controller (again marked with plus
and minus), start the wires leading up to the respective poles of the battery
as we will see below (positive to positive terminal of the battery and the
negative to the negative terminal of battery) .
The two left jacks (which again marked with plus and minus on the charge
controller) are the two relevant wires photovoltaic panels to charge the
battery.
The cables must enter a specific channel (eg, coils) to be protected from the
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weather, as they have a battery with the governor placed in a waterproof
box. The thickness of the wires need not be very big. Cross-section of 2,5
mm is sufficient, unless the lights or battery or solar panels are large
distances between them (eg more than 10 meters apart from each other).
The final result
The governor has the ability to automatically turns lights when it gets dark
and to switch off after 2 to 12 hours (adjustable from us). At the same time
ensure proper forisi and discharge the battery to protect it from premature
wear.
The consumption of this system is 41,60 Wh (Watt hours) for 8 hours every
night (4 lights x 1,3 Watt X 8 hours). So we covered a small photovoltaic
panel of 10 Wp, which is a sunny day produces about 50 Wh (Watt hours).
Ένα σύστημα ηλιακής ενέργειας για τον φωτισμό ενός κήπου, διαφέρει
από ένα συνηθισμένο σύστημα που τροφοδοτείται από το δίκτυο της ΔΕΗ
στο ότι ακριβώς, δεν είναι συνδεδεμένο με το δίκτυο της ΔΕΗ αλλά
τροφοδοτείται με ρεύμα που παράγεται από την ηλιακή ενέργεια. Η
καρδιά ενός τέτοιου συστήματος είναι το φωτοβολταϊκό πάνελ που
μετατρέπει την ηλιακή ενέργεια σε ηλεκτρική.
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Η ενέργεια που συσσωρεύεται κατά τη διάρκεια της ημέρας από τον ήλιο,
αποθηκεύεται για τη νύχτα σε έναν ειδικό συσσωρευτή (μπαταρία) 12V,
κατάλληλο για εφαρμογές ηλιακής ενέργειας. Θα μπορούσε να
χρησιμοποιηθεί ακόμη και μια μεγάλη μπαταρία για τροχόσπιτα ή σκάφη
θαλάσσης. Η μπαταρία αυτή έχει αρκετά μεγάλη χωρητικότητα για να
τροφοδοτεί τα φωτιστικά με ρεύμα για αρκετές νύχτες, ακόμα και αν
έχουμε μερικές μέρες χωρίς καθόλου ηλιοφάνεια.Οι διαφορές από ένα
συνηθισμένο σύστημα που τροφοδοτείται από το δίκτυο της ΔΕΗ.
εντοπίζονται σε τρία σημεία:
Για κάθε 4-5 φωτιστικά απαιτείται ένα πάνελ ισχύος περίπου 130Wp, ένας
συσσωρευτής (μπαταρία) χωρητικότητας περίπου 150ΑΗ κι ένας ρυθμιστής
φόρτισης του συσσωρευτή. Μεταξύ του συσσωρευτή και των φωτιστικών
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τοποθετείται και μια ασφάλεια. Το κόστος ενός τέτοιου συστήματος είναι
περίπου 1.200 Ευρώ.
Λόγω χρήσης ηλιακής ενέργειας, ένα τέτοιο σύστημα με 15 φωτιστικά
συνεπάγεται την αποφυγή έκλυσης 500 κιλών διοξειδίου του άνθρακα στην
ατμόσφαιρα κάθε έτος. Ισοδύναμα, σα να φυτέψαμε άλλα 10 δέντρα στον
κήπο μας!
Η φωτεινότητα των λαμπτήρων εξοικονόμησης ενέργειας 12V των 9W για
παράδειγμα, αντιστοιχεί σε αυτή κλασικών λαμπτήρων πυράκτωσης των
40W, εξασφαλίζοντας έτσι πολύ ικανοποιητικό φωτισμό κήπου.
Ένα βασικό πλεονέκτημα αυτής της λύσης είναι ότι τα φωτιστικά μπορούν
να τοποθετηθούν οπουδήποτε, αφού μόνο το φωτοβολταϊκό πάνελ
χρειάζεται να τοποθετηθεί σε σημείο που να το βλέπει απ' ευθείας ο ήλιος
τις περισσότερες ώρες της ημέρας.
Σε αντίθεση με τα απλά αυτόνομα φωτιστικά κήπου που προορίζονται
περισσότερο για διακοσμητικό φωτισμό.
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Στην παραπάνω φωτογραφία φαίνεται μια μικτή εφαρμογή διακοσμητικού
φωτισμού κήπου με led (μπλε και πράσινο) και φωτιστικά 12V-9W (λευκό),
με συνολική κατανάλωση ρεύματος μόλις 70W την ώρα! Όσο καίει δηλαδή
ένας απλός λαμπτήρας πυράκτωσης σε ένα δωμάτιο
Ηλιακά φωτιστικά κήπου (και όχι μόνο)
Αυτό το μήνα ήθελα να φτιάξω ηλιακά φωτιστικά κήπου! Όχι όπως αυτά
τα ηλιακά φωτιστικά του εμπορίου που ψάχνεις να δεις αν είναι
...αναμμένα! Αυτά του εμπορίου χρησιμοποιούν ένα ή και περισσότερα
λαμπάκια led τα οποία όμως είναι κατάλληλα μόνο για διακοσμητικό
φωτισμό, όχι για λειτουργικό.
Τα "λαμπάκια" led έχουν εξελιχθεί πολύ τα τελευταία χρόνια, έτσι έψαξα
να βρω κάποια που να είναι ισχυρά αλλά και με τη λιγότερο δυνατή
κατανάλωση σε ρεύμα.
Κατέληξα στα led του τύπου luxeon 1W. Το ένα Watt μπορεί να μοιάζει
λίγο αλλά δεν είναι! Ένα luxeon led είναι περισσότερο από 10 φορές πιο
λαμπερό από τα συνηθισμένα led.
Έτσι, η φωτεινότητα 8 φωτιστικών θα είναι παρόμοια σα να είχαμε
τοποθετήσει σχεδόν 100 από τα απλά ηλιακά φωτιστικά!
Ένα τέτοιο super-led δεν μπορεί απλά να αντικαταστήσει το μικρό led σε
ένα συνηθισμένο ηλιακό φωτιστικό κήπου, γιατί δεν θα το υποστήριζε το
ηλεκτρονικό του κύκλωμα, ούτε η μπαταρία του.
Καλύτερα όμως! Έτσι κι αλλιώς δεν μου αρέσει το σχήμα και η ποιότητα
αυτών των φθηνών ηλιακών φωτιστικών.
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Εδώ θα φτιάξουμε ένα κιτ μετατροπής το οποίο θα μπορεί να μπει σε
οποιοδήποτε φωτιστικό, όπως τα κανονικά φωτιστικά εξωτερικού χώρου
που λειτουργούν με το ρεύμα της ΔΕΗ.
Μόνο που με αυτό το κιτ μετατροπής, δεν θα χρειάζονται καλώδια στον
κήπο, ούτε εγκατάσταση ρολογιού από τη ΔΕΗ, ούτε θα έχουμε μηνιαίους
λογαριασμούς, ούτε θα χρειαστούμε 2.000 Ευρώ για τον ηλεκτρολόγο και
τα υλικά!
Επιπλέον, θα είναι ένα κιτ μετατροπής που θα μπορούσε να βρει εφαρμογή
και σε άλλες χρήσεις:
Η κατασκευή
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Όπως φαίνεται και στην παραπάνω φωτογραφία, η συναρμολόγηση είναι
πανεύκολη:
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Στη φωτογραφία φαίνεται η τελική εγκατάσταση. Το κουτάκι που περιέχει
το κιτ φωτισμού το στερέωσα στην πίσω πλευρά του φωτοβολταϊκού
στοιχείου. Το λαμπάκι led μπαίνει μέσα στο φωτιστικό εξωτερικού χώρου
από μια τρύπα που άνοιξα στο πάνω μέρος του, όπως φαίνεται στην
αμέσως επόμενη φωτογραφία (το κιτ θα μπορούσε να μπει και μέσα στο
φωτιστικό για να μην φαίνεται). Μόνωσα τα κενά με σιλικόνη για να
προστατεύονται από τη βροχή.
Η απόδοσή του είναι παραπάνω από επαρκής, ενώ φωτίζει για τόσες ώρες
τη νύχτα, όσες ήταν και οι ώρες έντονης ηλιοφάνειας τη μέρα και λίγο
παραπάνω!
Αν δηλαδή μια καλοκαιρινή μέρα είδε 6 ώρες έντονης ηλιοφάνειας, θα
φέγγει για περίπου 8-10 ώρες τη νύχτα. Το χειμώνα υπολογίζω να
λειτουργεί για περίπου 6-7 ώρες τη νύχτα.
Το φωτοβολταϊκό πάνελ, αντί να τοποθετηθεί στο πάνω μέρος του
φωτιστικού θα μπορούσε να τοποθετηθεί και χαμηλότερα, για παράδειγμα
στηριζόμενο με ένα κομμάτι λαμαρίνας στη μεταλλική βάση του
φωτιστικού, ή και δίπλα από το φωτιστικό πάνω σε ένα ξύλινο ή
μεταλλικό πασαλάκι.
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Όπως ανέφερα και παραπάνω, το κιτ φωτισμού μπορεί να χρησιμοποιηθεί
και αλλού. Με 3 κιτ (χωρίς φυσικά το μεταλλικό φωτιστικό) τοποθετημένα
το ένα δίπλα στο άλλο πάνω σε μια μακρόστενη πλαστική, ξύλινη ή
αλουμινένια βάση, μπορούμε να φωτίζουμε μια διαφημιστική πινακίδα.
Με 3 ή 4 κιτ μπορούμε να φωτίσουμε ακόμη κι ένα μικρό δωμάτιο ή
αποθήκη! Στην τελευταία αυτή την περίπτωση μάλιστα δεν χρειάζεται η
πλακέτα-αισθητήρας νυκτός, αφού μπορούμε να τα ανάβουμε με διακόπτη
(μειώνοντας έτσι σημαντικά και το κόστος).
Εδώ θα δούμε πως μπορούμε με πολύ απλό τρόπο (και πολύ οικονομικά)
να φωτίσουμε τον κήπο ή το μπαλκόνι μας με δωρεάν ενέργεια από τον
ήλιο! Η λύση αυτή είναι τόσο απλή που κυριολεκτικά μπορεί να την
εφαρμόσει ο καθένας...
Ας ξεκινήσουμε από το πρόβλημα: Με τις συνηθισμένες λύσεις του
εμπορίου έχουμε τα παρακάτω προβλήματα:
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σποτάκι όπως για παράδειγμα στις παρακάτω φωτογραφίες:
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Ετοίμασα έτσι και τα τέσσερα φωτιστικά.
Στο τέλος τοποθέτησα σε όλα το πάνω
μέρος του φωτιστικού και το τελικό
αποτέλεσμα είναι άψογο και
επαγγελματικό: Όπως βλέπουμε στην
παραπάνω φωτογραφία, από την ειδική
έξοδο στο κάτω μέρος του κάθε
φωτιστικού βγαίνουν δύο καλώδια - ένα
μαύρο κι ένα κόκκινο (το αρνητικό και το
θετικό αντίστοιχα).
Από τις δύο μεσσαίες υποδοχές του ρυθμιστή φόρτισης (πάλι σημειωμένες
με συν και πλην), ξεκινάνε τα καλώδια που καταλήγουν πάνω στους
αντίστοιχους πόλους της μπαταρίας όπως θα δούμε και παρακάτω (το
θετικό στο θετικό πόλο της μπαταρίας και το αρνητικό στον αρνητικό πόλο
της μπαταρίας).
Στίς δύο αριστερές υποδοχές (που πάλι σημειώνονται με συν και πλην
πάνω στο ρυθμιστή φόρτισης) συνδέονται τα δύο αντίστοιχα καλώδια του
φωτοβολταικου πάνελ που θα φορτίζει τη μπαταρία.
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Τα καλώδια πρέπει να μπουν σε ειδικό κανάλι (πχ σπιράλ) για να
προστατεύονται από τον καιρό, όπως πρέπει και η μπαταρία με το
ρυθμιστή να τοποθετηθούν σε ένα αδιάβροχο κουτί. Το πάχος των
καλωδίων δεν χρειάζεται να είναι ιδιαίτερα μεγάλο. Διατομή 2,5mm είναι
αρκετή, εκτός κι αν τα φωτιστικά ή η μπαταρία ή το φωτοβολταικο πάνελ
είναι σε μεγάλες αποστάσεις μεταξύ τους (πχ πάνω από 10 μέτρα το ένα
από το άλλο).
Το τελικό αποτέλεσμα
When the battery is required need not be large: a small - and cheap - 12volti
lead battery with a capacity of 12 AH (ampere hours) gives us not only
eating one day, but also provides additional autonomy for two or three days
without sunshine. In Greece we have sunshine 300 days a year!
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In the photo below appears and the actual outcome of these four lights:
Pretty impressive, especially for easy construction with minimal cost!
Cost
The photovoltaic panel costs 55 euros, 45 million the governor and four
spots 28 euros (7 euros each). These lights cost 9 euros each, but as noted
above, all kinds of lighting is appropriate. A 12volti 12 AH lead acid battery
(like those used by bikes) costs 30 euros. Make a small car battery.
For 8 lights, doubling the battery capacity (or put second battery) and get a
second panel. The governor is the same, no further need for having
resistant up to 5 solar panels (ie up to 20 fixtures with these spots). The
same is also true for 12, 16 or 20 lights.
Wind and Photovoltaic
. Wind and Performance Curves
The power rating indicates a wind turbine by itself does not tell us much
about the energy that can give us. Indicates only power that can give the
wind to a specific wind speed.
For example 400W to 12,5 m / s (meters per seconds). Ordinary wind but
around 4-6 m / s and very few hours time we have 12,5 m / s.
What you need to know is this: For wind speeds prevailing in the region to
install a wind turbine, how much power can give any wind turbines
compare?
Some wind turbine is suitable for lower speed wind turbine and another the
opposite. It is good to look and performance curves for each turbine at
various wind speeds and of course we know the wind speeds that prevail in
the plant.
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Each turbine has its own yield curves, for example above regarding small
wind turbine 400W. But we can see that the nominal power of 400W is
reached in wind speed of about 12,5 m / s which is valid for a few hours
time.
Usually when windy, the wind speeds are between 3 and 7 m / s in most
areas that interest us. At these speeds, but as we see from the first curve,
the wind only produces about 50W of power!
If we know the average annual wind speed in the region of interest, then
the second curve we find a (very rough) estimate of the monthly production
KWh (kilowatt hours) of wind. One size clearly more useful than before.
For example, the annual average wind speed 4,5 m / s can expect the wind
around 18 to 25 KWh per month, depending on how good the location of
the facility (obstacles, height, soil, altitude, air density , temperature, etc.).
Data on average wind speed, we can look at weather services (such as
NA). The yield curve of a wind turbine manufacturer helps to have an initial
idea and to facilitate comparisons.
Does not mean that if we calculate again the yield curve for the same wind
turbines installed in a location that we get the same results.
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There are other factors that may affect the result (a different land, air
density, etc.).
Most manufacturers provide curves and estimated (annual or monthly)
production in KWh (kilowatt hours) for a wind turbine. This is much easier,
since this is the size that ultimately concerns us.
But it is calculated under certain conditions ... And while removed our
facility from the ideal, the lower is the production of wind turbine (much
lower).
Solar Cube: A system for providing potable water and electricity supply for
emergencies
The Solar Cube is a product of Swiss Company Spectra Watermakers has
the ability to produce electricity through integrated photovoltaic panels and
wind generator available, and the cleaning ability of water from any source
or desalination of seawater. The Solar Cube is supplied ready for
installation, which lasts only a few hours and can be used to provide water
and electricity to remote areas or emergency situation. Available in 3
versions:
• SSW 3500: Produces 3500 liters of water per day from seawater
• SSBW 6500: Produces from 3500 to 6500 liters of water a day depending
on the extent of salt water
• SFWS 15000: It produces 15,000 liters per day from any source not
saltwater removing viruses and bacteria without chemicals
Competent Authorities
The projects and activities fall into categories (A1, A2, B3, B4) where the
disturbance to the environment. Under the category, department
responsible for the Approval of Environmental Terms (EPO) is the Ministry,
or region, or prefecture concerned.
The matching category - the department is following
A1 -> Ministry
A2 -> REGION
B3 -> B3 PROJECT IN CASE sends REGION Preliminary order to decide
whether the project will be examined by region or IF will be examined by
the prefecture.
B4 -> PREFECTURE
Tin integrity of the land, the surface of which may not be less than 500 m2.
Distances between the facility boundaries of the land, which shall not be
less than 2.50m.
The amount of coverage may not exceed fifty percent (50%) plots of land,
the amount of the rate of construction land shall not exceed 1.20 and the
coefficient of volume operators can not
exceed 5.
The amount of solid fencing of the land, if necessary for reasons of public
safety and facilities. This height must not exceed 4.50 meters. "
ELIGIBILITY CRITERIA
4.
The siting of solar systems, there must be some specific geological
features and various economic and construction criteria. So:
Fitness Network MV: To create a fitness area around the grid, set a
maximum distance from the boundaries of the network to 1 km. That is,
what serves the installation of photovoltaic, is within this 1 km. The distance
was defined considering that any activity beyond this limit is uneconomical
because it would require construction of roads and installation of power
poles.
Adequacy of Total Road Network: The road highway, including the main
and secondary roads on the island of Lesbos. This created an area of
health from the limits of these roads up to a distance of 3 km. This distance
was considered ideal, not to burden the entire project, with further financial
cost. Appropriate land uses: The current land uses are considered suitable
for the location of the photovoltaic park without causing any deterioration of
the natural environment, are those in grassland, shrub and arid land.
Appropriate gradient: Another important patch are appropriate gradient. It
was considered that the appropriate talents, they give us the maximum
desired radiation and therefore maximum output of photovoltaic, is between
40 - 60 degrees. Following the same theoretical background, the slope is
proposed to install solar on a fixed horizontal base, is that the latitude of the
418
region. Since our site is appropriate latitudes near 39 degrees, the selection
gradients that we do not deviate much and is quite efficient.
Suitable Elevation: The height suitable for installing solar park, it was 200
meters, near which is the average height of the island. This criterion was
because it was considered to be ideal and might avoid potential reflections
from the ground.
Suitable Gradient Orientation: The appropriate orientation gradients is a
necessary patch, created based on the theoretical ypovathrooso the
northern hemisphere, the appropriate stance of photovoltaic modules with a
fixed base is the south. Therefore considered as suitable oriented
gradients: South, South-East and South-West, for maximum efficiency of
photovoltaics with constant horizontal basis. The patch of suitable oriented
gradients, resulting from the processing of the suffix of slopes that have
419
created the Tin
420
Ολικού Οδικού Δικτύου ΚΥΡΙΟΙ ΚΑΙ ΔΕΥΤΕΡΕΥΟΝΤΕΣ
Χρήσεις Γης ΧΟΡΤΟΛΙΒΑΔΙΚΟ
Κλίσεις Εδάφους> 40-60 μοίρες 40
Υψόμετρο 200μ 200
Προσανατολισμός ΝΑ ΝΑ
ΑΡΧΑΙΟΛΟΓΙΚΟΙ ΧΩΡΟΙ ΟΧΙ
ΠΑΡΑΔΟΣΙΑΚΟΙ ΟΙΚΙΣΜΟΙ ΟΧΙ
ΝΑΤUΡΑ 2000 ΤΚΣ & ΖΕΠ ΟΧΙ
ΝΑΤUΡΑ 2000 TKS ΟΧΙ
ΝΑΤUΡΑ 2000 ΖΕΠ ΟΧΙ
ΚΑΤΑΦΥΓΙΟ ΑΓΡΙΑΣ ΖΩΗΣ ΚΑΙ ΟΧΙ
ΘΗΡΑΜΑΤΩΝ
ΑΙΣΘΗΤΙΚΑ ΔΑΣΗ ΟΧΙ
ΓΗΠΕΔΟ ΜΕΓΑΛΥΤΕΡΟ ΤΩΝ ΝΑΙ
500μ
ΣΥΔΕΣΗ ΜΕ ΔΙΚΤΥΟ ΔΕΗ ΟΧΙ
ΑΠΟΣΤΑΣΗ ΑΠ ΟΙΙΣΜΟ ΝΑΙ
421
aesthetics, coverage issues insulation to avoid burdening the microclimate
of sites where you install these systems. Also, the decision of the Ministry
will not allow the installation of photovoltaic on a stairway ends in traditional
settlements and listed buildings, unless authorized by building special
conditions governing the settlements and the buildings are.
Penelope Mitroulia
I think it seriously study the square when I have available. For 4KW the time
it takes a house, a cost 20K €.
Watch it:
Incentives to install solar on rooftops, with simple procedures and increased
selling price to PPC's electricity generated from the sun, said Development
Minister.
As Mr Kostis Hatzidakis, the installation of photovoltaics will be no red tape
in planning without having to open books to the tax office, without taxation
or licensing by the Energy Regulatory Authority and the Ministry of
Development. On blocks the installation will be by decision of general
meeting of owners and a majority laid down in Regulation PPC buys energy
to produce solar panels to 55 minutes per kilowatt hour price for those
contracts signed in 2009, 2010 and 2011 and is guaranteed for 25 years
indexed. Under these circumstances, the return on investment will be made
over approximately five years. The PPC will set off the account with the
amount of power bought by the household. If the values are greater than
charges for electricity, the account will be credit.
Power stations dry steam, which directly use geothermal steam to turn the
turbines.
Steam vacuum (Flashed Steam):
Magnification
Magnification
The direct use of hot water, pipeline, heating greenhouses and melting
snow from the sidewalks.
Hot water near Earth's surface can be driven directly by pipeline to facilities
and used to heat buildings, assist in growing plants in greenhouses, to be
dehydrated onions and garlic to heat water for fish farms and pasteurization
of milk . Some cities ride the hot water pipes under the streets and
sidewalks to melt snow. Local heating networks using hot water to heat
buildings in whole communities.
Almost everywhere, the 3 measures are up and above the Earth's surface
maintains a nearly constant temperature between 10 and 16 ˚ C. A system
of conductors of heat from geothermal energy is by
1. pipelines buried rather deep in the ground near the building
2. a converter heat (heat exchanger) *, and
3. pipeline system in the building
In winter, heat from the relatively warmer land is transferred through the
heat converter in the house. In summer, warm air from the house is
transferred through the heat converter in the relatively cooler ground. The
heat removed during the summer can be used as no-cost energy to heat hot
water.
Heat converter is a device for good heat transfer from one fluid to another,
or fluids are separated by a solid wall that never mix, or in direct contact.
The heat converters are widely used in oil refineries, the energy channels in
the processing of natural gas, air conditioning, etc. A typical example is the
converter heat radiator in the car, where a liquid cool a hot engine, such as
antifreeze liquid converts heat into the air which leaves the radiator. Source
"Energy Efficiency and Renewable Energy"
425
Heat Pumps derived from geothermal energy
Heat pumps derived from geothermal energy, sometimes called geo-
converters used by the late '40s.
Geothermal Pump GeoColumn
The problem of lack of space on the circuit a geothermal pump is to solve
the patented system GeoColumn. Instead of vertical or horizontal cooling
loops has a column type well is 0.6 m in diameter and a depth of 4.5-6 m.
Pump simple circuit Earthlinked
Geothermal pumps Earthlinked is a very simple system of heating and
cooling a building without using a compressor and evaporator. The
refrigerant circuit is in direct contact with earth, thus providing a simple and
efficient heat transfer.
Law 3468/2006: Paragogiss Renewable Electricity
The Greek State Law 3468/2006 on the Production of Electricity from
Renewable Energy and Combined Heat and Power High Performance and
other provisions (Government Gazette A 129/27.06.2006) is the law
governing the conditions for the creation of electricity generation from
renewable energy sources. Key provisions of the law that allowed
individuals to create power plant with renewable sources of energy but
usually requires a permit from the Ministry of Development and the
transmission network, electricity supply is required to purchase energy
produced legally licensed units. Law translation including Directive
2001/77/EC of the European Community
New Investment Law 3522/06
The Greek State Law 3522/06 (Gov. 276/22-12-06) is often called the "new
investment law. Essentially a modification of the new development law
3299/04 (Government Gazette 261 A '/ 23.12.2004). The changes made in
relation to 3299/04 are essentially the separation of the country into three
regions aid projects (versus four), and rates of payments depending on the
location and amount of investment.
Source: wikipedia, GNU Free Documentation License
Geothermal Pump GeoColumn
The problem of lack of space on the circuit a geothermal pump is to solve
the patented system GeoColumn. Instead of vertical or horizontal cooling
loops has a column type well is 0.6 m in diameter and a depth of 4.5-6 m.
A typical home requires about 3 such columns. Well positioned in a
container of high density polyethylene which is filled with water. The
refrigerant circuit is then placed inside the container. Because of the large
available surface of the system ensures high efficiency heat transfer in
continuous contact with the ground.
The system is sealed with a hard cap, which lies at a depth of 1 m, and
allows access if needed repairs
Pump simple circuit Earthlinked
Geothermal pumps Earthlinked is a very simple system of heating and
cooling a building without using a compressor and evaporator. The
426
refrigerant circuit is in direct contact with earth, thus providing a simple and
efficient heat transfer.
The coolant circulates in a circuit of high-conductivity copper providing direct
heat transfer to and from the ground.
The geothermal circuit is available in three different topologies: horizontal,
vertical and diagonal, and may replace other less efficient circuits of
different manufacturers.
Heat Pumps derived from geothermal energy
Heat pumps derived from geothermal energy, sometimes called geo-
converters used by the late '40s.
The GHPs use the constant temperature of the earth as a means of
conversion rather than the external air temperature. This allows the system
to reach fairly high efficiencies (300% -600%), the coldest winter nights,
compared to 175% -250% on cold days with a source of convection air.
While many parts of the country there can be strong fluctuations in
temperature depending on the season, from summer heat in temperatures
below zero in winter, a few meters below the earth's surface the ground
remains at a relatively constant temperature. Depending on latitude, ground
temperatures range from 10 ˚ C to 21 ˚ C. Like a cave, this ground
temperature is warmer than the air above the ground during the winter and
cooler than air in the summer. The GHPs exploits this fact by exchanging
heat with the earth through a ground heat converter.
As with any heat pump, heat pumps derived from geothermal energy
(geothermal heat pumps) or water (water-source heat pumps) can heat to
cool, and if there is equipment to supply hot water at home.
Some models of geothermal systems are available with two-speed
compressors and fans for a variety of comfort and energy savings. As for
the heat pumps air source, are quieter, last longer, require little
maintenance and are not dependent on outside air temperature.
A heat pump with dual energy source (dual-source heat pump) combines a
heat pump air source (air-source heat pumps) and a heat pump is derived
from geothermal energy. These devices combine the best features of both
systems.
Heat pumps with dual power source have higher efficiency ratios than the
corresponding wind, but not as efficient as geothermal. The main advantage
of dual-source systems that cost far less to install than as a geothermal unit,
and work about as well.
427
Types of pipes for geothermal heat extraction
Magnification
Vertical
Large commercial buildings and schools often use vertical systems because
the land needed for horizontal systems was prohibitive factor. The angles
are also used where the soil is too shallow for grooves, and these systems
minimize the disruption to the existing landscaped setting. For a vertical
system, holes (diameter about 15 cm) open at about 6 meters from each
other and to a depth of 30 to 100 meters. Within these holes enter two pipes
that connect to the bottom of a horizontal tube placed in the grooves and
connected to the heat pump inside the building.
Magnification
428
each series, the system of tubes remain horizontal with the exception that is
diverted into three clusters-deep vertical loops. At the end of the line, the
line makes a curve and returns to the beginning of the series and turned into
a pipe that leads back into the building.
Tank / Lake
If the region has sufficient water volume, it might be to choose the lowest
cost. A supply tube is placed in the ground by building up the water and
rolled into coils in a water depth of eight feet below ground to avoid freezing.
The coils should only be placed in an area of water that meets the criteria
for the minimum allowable size, depth and water quality.
Magnification
Image of a closed circuit type tank / lake shows the tubes start from the
home and into the ground, then go to the pond or lake. The pipe is
immersed into the pond or lake, and then forming horizontal loops systems,
consisting of seven large overlapping loops, then returns to the edge of the
basin extends upward near the surface and return home.
Open circuit
This type of system uses pigadisio water or surface as the heat exchange
fluid that circulates directly through the GHP system. Once it is released into
the system, the water returns to the soil through the well through a well or
through a regeneration effluent to the ground. This option is obviously
practical only where there is adequate supply of clean water, and kept all
local codes and regulations regarding the discharge of water from the soil.
Magnification
Image shows an open circuit a pipe to transfer water from the house to the
outside in the ground and from there into a well, which emptied the water in
the soil. A separate tube in a pit just beyond diverting water from the well
and return home
ABSTRACT
Smart and accurate solutions for all of the protection of the building
envelope and to avoid the intrusion of unwanted solar radiation inside, other
than "good" relationship that develops the same building with nature and the
environment, and raise the following important problems: a) if the individual
shading modes are driven by modern technological developments b) if the
sun protection methods used are effective and c) that ultimately redefine the
criteria for building design in relation to the size of thermal comfort. This
approach will attempt to answer these questions, focusing on traditional and
modern building construction located in an area with particular climatic data
such as the Mediterranean.
1. INTRODUCTION
The term sun protection meant the deliberate avoidance of direct solar
radiation for a specified period or permanently, the openings of building
envelope and everything connected with this process we call shade.
Monitoring protection of openings is a key chapter in the Mediterranean
Architecture primarily because the region solar income during the warm
season are not only length and intensity but also provide adequate over-
lighting conditions in all indoor areas, causing discomfort and problems
amenity. It is no coincidence that two of the pioneers of modern architecture
such as Le Corbusier and Aris Konstantinidis' touched upon with respect to
the landscape "to local conditions and climatic conditions and built buildings
in no way contradicted it. Over the last decade in our country, under the
considerations of sustainability and environmental planning has been a
focus on the "good" practices of bioclimatic design. The wide application
rather slow even after the hermetically closed facades of buildings,
continued propagation of high energy and behavior is a fundamental
difference in the effects of wind, sun, the particular circumstances of the
urban environment and increasing demands of users. Developments
concerning the sustainability of the environment is changing rapidly.
Therefore, failures or omissions or negligence of those involved in the
bioclimatic design need to be eliminated. Every "good effort in this direction
should not only be rewarded but to serve as a study to draw useful
conclusions.
2. ON ILIOPROSTASIAS
2.2. Climate
A second step in the design of passive solar shading is the study of place
and location, which requires deep knowledge of the climate of the region.
The climate is always in relation to Makroklima the Mesoklima and
Microclimate viz: a) the mainland and latitude of the region (Makroklima), b)
the local topography (relief, water surfaces) Mesoklima and c) the location,
431
ie urban natural or environmental conditions vegetation, topography, etc.
(Microclimate). The Mediterranean climate characterized by hot dry
summers and mild winters and is found in countries around the
Mediterranean and elsewhere in the same geographical features such as
California or South Australia or South parts of Chile and South Africa. The
main climatic variables that must be involved in the design of buildings in
the Mediterranean are: 1.the high percentage iliofaneias2. or relative or
absolute ygrasia.3. The brightness of the sky and 3. or soil temperature.
Prices sunshine in Athens over the cities of northern Europe arrives at 2818
hours / year (with a theoretical maximum of 4400 hours per year) and cities
in Central Europe such as Vienna or Berlin in 1800ores/etisios. The high
amount of sunlight in the Athens area in conjunction with the phenomenon
of "Urban heat islands, winds, and densely built urban fabric is the most
serious limiting factors for the implementation of the principles of shading.
Table 1
Ambient-Climate Building shells
General characteristics of the construction
High humidity
and temperature. Torrential rains Facing the Rain. Ground floor. Increased
air movement indoors. The sunlight does not penetrate directly into the
building. Shadowing at an angle
Dry with high temperatures in summer.
(Features Mediterranean climate) Provide thermal mass of the shells
(mainly stone and roof) for maximum absorption of solar heat to maintain a
low internal temperature. The small openings allow a limited amount of light
to penetrate to the inside. space. In winter, the effective insulation of local
materials are small heat losses and therefore heating requirements.
Mild temperature variations and moderate humidity usually brick walls and
roofs of straw or of local materials. These are favorable conditions for
people and structures do not interact directly with those weather conditions.
Cold with snow increased operation volume of snow to protect the building
from cold winds. The sunlight penetrates with appropriate dimensioning of
the openings. The materials are mainly from tree trunks.
Drought with high temperatures day and night operation low thermal mass
of the soil. The ventilation of spaces based on the phenomenon of buoyancy
of hot air. Usually the outdoor air enters from underground duct regulating
432
the thermal comfort indoors.
In Table 1 we see that: in geographical areas where the climate is hot and
dry with the main features of the high summer temperatures and mild
winters (like eg the Mediterranean) of the building must have a sufficient
thermal mass to undertake large amounts of solar heat to maintain low
temperature. It is similar to the construction side of masonry walls and roof
shaped the required thermal mass. Also, small windows allow small
quantities of light to penetrate the interior and the main function of the
exposure was to provide visual contact with the outside world. In winter the
buildings had been very low heat loss and heat requirements were generally
not more than the current highly insulated buildings. We also note that
traditional buildings, not only do not conflict with any principle of bioclimatic
design, but respond with an absolute and unique clearly to the need for
benefit esoklimatos course of thermal and visual and psychological comfort
of the user.
Because "the ethical aspects of delivery have to collect a lot of attention to
no case become quaint" as said by Mr Hatzidakis hence the components
could be added, it is necessary to understand the tradition as a process first
merges and places the primary wisdom of people in today's complex needs
and secondly as a process that is destined to be overcome if only we
always meet in the future
Table 2
Properties of Glass (in warm climates) Comments
Ordinary glass creates global outbreaks transported protect essential
interests of the sunlight nearly UT-schemes and programs in interior Heat
Capacity 1250 Wh/m3. (Aluminum 450 Wh/m3K, air 0,36 Wh/m3K)
Absorbent Absorbing a large amount of infrared radiation increases the
temperature of the blown indoors. Leakage of heat into the interior corrected
only when mounted on the outer side of a double curtain wall.
Semi-permeable reflective metallic coating that reflects infrared radiation by
reducing the overall heat gain we often decreased and changes in sunlight
indoors
Prismatic Prevents sunlight with their own shape. The prevention of
radiation is not easily controlled
Table 3
Categories blinds Comments
Internal Venetian blinds are usually Various rolls. Banner fabric. It is usual
solution that results is limited because the sun has already invaded the
interior and has created conditions for super-heating.
Exterior shutters, awnings made of fabric or plastic. Blinds (horizontal
vertical or both) is most efficient shading systems since called to prevent the
solar radiation before it reaches the glass surface. (A special category of
brise-soleil)
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