Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 16 views

    Design Project: Presented By

    Uploaded by

    Vishnu
    Vishnu N. Namboothiri presented a design project to the Department of Electrical & Electronics Engineering. The project covered three topics: space-based solar power (SBSP), airborne wind turbines (AWT), and triboelectric nano generators (TENG). SBSP involves collecting solar energy in space via reflectors and transmitting it to Earth wirelessly. AWT uses wind turbines placed high in the air and tethered to the ground to take advantage of stronger winds. TENG converts mechanical energy from vibrations or motion into electricity using triboelectric effects between contacting materials.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd

    Design Project: Presented By

    Uploaded by

    Vishnu
    16 views20 pages
    Vishnu N. Namboothiri presented a design project to the Department of Electrical & Electronics Engineering. The project covered three topics: space-based solar power (SBSP), airborne wind turbines (AWT), and triboelectric nano generators (TENG). SBSP involves collecting solar energy in space via reflectors and transmitting it to Earth wirelessly. AWT uses wind turbines placed high in the air and tethered to the ground to take advantage of stronger winds. TENG converts mechanical energy from vibrations or motion into electricity using triboelectric effects between contacting materials.

    Original Description:

    Original Title

    Sem

    Copyright

    © © All Rights Reserved

    Available Formats

    PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    Vishnu N. Namboothiri presented a design project to the Department of Electrical & Electronics Engineering. The project covered three topics: space-based solar power (SBSP), airborne wind turbines (AWT), and triboelectric nano generators (TENG). SBSP involves collecting solar energy in space via reflectors and transmitting it to Earth wirelessly. AWT uses wind turbines placed high in the air and tethered to the ground to take advantage of stronger winds. TENG converts mechanical energy from vibrations or motion into electricity using triboelectric effects between contacting materials.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    16 views20 pages

    Design Project: Presented By

    Uploaded by

    Vishnu
    Vishnu N. Namboothiri presented a design project to the Department of Electrical & Electronics Engineering. The project covered three topics: space-based solar power (SBSP), airborne wind turbines (AWT), and triboelectric nano generators (TENG). SBSP involves collecting solar energy in space via reflectors and transmitting it to Earth wirelessly. AWT uses wind turbines placed high in the air and tethered to the ground to take advantage of stronger winds. TENG converts mechanical energy from vibrations or motion into electricity using triboelectric effects between contacting materials.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 20

    DESIGN PROJECT

    PRESENTED BY,
    VISHNU N. NAMBOOTHIRI
    ROLL NO: 45
    BATCH: S5.E
    DEPARTMENT OF ELECTRICAL &
    ELECTRONICS ENGINEERING

    29-08-2019
    Dept. of EEE 1
    LIST OF TOPICS

     SPACE BASED SOLAR POWER(SBSP)

     AIRBORNE WIND TURBINE(AWT)

     TRIBO ELECTRIC NANO GENERATOR(TENG)

    29-08-2019
    Dept. of EEE 2
    SPACE BASED SOLAR
    POWER(SBSP)
    INTRODUCTION
    • Collecting solar power in space

    • Transmit it wirelessly to earth

    • Peter Glaser granted US patent - transmitted power over long


    distances using microwaves

    29-08-2019
    Dept. of EEE 3
    SPACE BASED SOLAR POWER(SPSB)

    29-08-2019
    Dept. of EEE 4
    DESIGN
    SBSP essentially consists of three elements:

    • Collecting solar energy in space with reflectors or inflatable


    mirrors - onto solar cells

    • Wireless power transmission to earth via microwave or laser

    • Receiving power on earth via a rectenna - a microwave antenna

    29-08-2019
    Dept. of EEE 5
    WHY SBSP?
    • Earth receives 174 petawatts of solar radiation - at upper
    atmosphere

    • 23% absorbed by atmosphere & 29% reflected

    • 48% received by earth surface - available for gathering solar


    energy - for prevailing techniques

    • Solar energy - largest potential energy source available

    • On a larger scale - can supply all electrical needs of our planet...!

    29-08-2019
    Dept. of EEE 6
    REFERENCES
    [1] Glaser, P. E. (1968). "Power from the Sun: Its Future". Science. 162
    (3856): 857–61. Bibcode:1968Sci...162..857G.
    doi:10.1126/science.162.3856.857. PMID 17769070
    [2] https://en.wikipedia.org/wiki/Space-based_solar_power
    [3] Glaser, P. E. (1968). "Power from the Sun: Its Future". Science. 162
    (3856): 857–61. Bibcode:1968Sci...162..857G.
    doi:10.1126/science.162.3856.857. PMID 17769070.
    [4] Solar Power Satellites. Office of Technology Assessment, August
    1981. 297 pages.
    [5] https://www.youtube.com/watch?v=vJcev0Jq3Ig

    29-08-2019
    Dept. of EEE 7
    AIRBORNE WIND TURBINE(AWT)
    INTRODUCTION

    • Wind turbine with rotor in air - without a tower

    • Connected to ground via tethers

    29-08-2019
    Dept. of EEE 8
    TYPES OF AWT

    • Ground-gen systems : Generator on ground

    Fixed Ground Station


    Moving Ground Station

    • Fly-gen systems : Generator on aircraft

    Crosswind
    Non-crosswind

    29-08-2019
    Dept. of EEE 9
    TYPES OF AWT

    (a) Ground-gen AWT (b) Fly-gen AWT

    29-08-2019
    Dept. of EEE 10
    ADVANTAGES
    • Higher velocity and persistance of wind at higher altitudes

    • Avoid expense of tower construction

    • No need of slip rings or yaw mechanism

    • Extremely low weight of airborne part

    • Can stay airborne in absence of wind - without power


    consumption

    29-08-2019
    Dept. of EEE 11
    DISADVANTAGES

    • Physically impossible to install every place

    • Bad weather could temporarily suspend use

    • Some schemes require long power cable

    • If turbine is high enough - probable to intercept prohibited


    airspace zone

    29-08-2019
    Dept. of EEE 12
    REFERENCES
    [1] Elliot, Dave (2014-04-12). "Flights of fancy: airborne wind turbines".
    Institute of Physics, Environmental Research Web. Archived from the
    original on 2014-04-19. Retrieved 2014-04-17.

    [2] Boyer, Mark. "Altaeros Energies’ Floating Wind Turbines Tap Into
    Strong High Altitude Winds" Inhabitat, 28 March 2012. Retrieved: 9 July
    2012.

    [3] Michael Specter, "Wind Power Takes Flight", The New Yorker May
    20, 2013 behind paywall.

    [4] https://en.wikipedia.org/wiki/Airborne_wind_turbine

    29-08-2019
    Dept. of EEE 13
    TRIBO ELECTRIC NANO
    GENERATOR(TENG)
    INTRODUCTION

    • Converts external mechanical energy to electricity

    • Triboelectric effect : Certain materials get electrically charged -


    due to contact or friction

    29-08-2019
    Dept. of EEE 14
    WORKING

    Step 1: Triboelectrification (inner circuit)

     Charge transfer
     Creation of a voltage drop

    Step 2: Electrostatic induction (outer circuit)

     Electron flow
     Balance of potential

    29-08-2019
    Dept. of EEE 15
    MODES OF OPERATION

    Types of TENGs

    29-08-2019
    Dept. of EEE 16
    MODES OF OPERATION
    Vertical contact separation mode
    • Two dissimilar electrode face each other - contact creates
    oppositely charged surfaces
    • On separating , potential drop created - when connected
    electrically by a load - current flow occurs
    • Once gap is closed - potential disappears - electrons flow back

    Lateral sliding mode


    • Relative sliding of two surface
    • Lateral polarisation - along sliding direction
    • Periodic sliding apart and closing - generates ac output

    29-08-2019
    Dept. of EEE 17
    MODES OF OPERATION
    Single electrode mode
    • Electrode on bottom part grounded
    • Electron exchanges between bottom electrode & ground

    Freestanding triboelectric-layer mode


    • Moving object naturally charged due to contact
    • Pair of electrodes fabricated underneath dielectric layer
    • Motion of freestanding layer between two electrodes - assymetric
    charge distribution in media - causes electrons flow between
    electrodes

    29-08-2019
    Dept. of EEE 18
    REFERENCES

    [1] Sala de Medeiros, Marina; Chanci, Daniela; Moreno, Carolina;


    Goswami, Debkalpa; Martinez, Ramses V. (2019-07-25). "Waterproof,
    Breathable, and Antibacterial Self‐Powered e‐Textiles Based on
    Omniphobic Triboelectric Nanogenerators". Advanced Functional
    Materials: 1904350. doi:10.1002/adfm.201904350. ISSN 1616-301X.
    [2] Fan, F. R.; Tian, Z. Q.; Lin Wang, Z. (2012). "Flexible triboelectric
    generator". Nano Energy. 1 (2): 328–334.
    doi:10.1016/j.nanoen.2012.01.004
    [3] Wang, S.; Lin, L.; Xie, Y.; Jing, Q.; Niu, S.; Wang, Z. L. (2013).
    "Sliding-Triboelectric Nanogenerators Based on In-Plane Charge-
    Separation Mechanism". Nano Letters. 13 (5): 2226–2233.
    Bibcode:2013NanoL..13.2226W. CiteSeerX 10.1.1.653.7572.
    doi:10.1021/nl400738p. PMID 23581714.
    [4] https://en.wikipedia.org/wiki/Nanogenerator

    29-08-2019
    Dept. of EEE 19
    THANK YOU

    29-08-2019
    Dept. of EEE 20

    You might also like