JPS5946375A - Seawater power generation device - Google Patents

Abstract

PURPOSE:To form a power generator having improved system efficiency by using the sea water by using a system in which the temperature of the surface layer of the sea water is raised by means of solar energy and a heating means in order to increase the difference of temperature between the surface layer and deep layer of the sea water. CONSTITUTION:A heater 22 for the sea water is set in such a way that a proper area of light-receiving face is provided on or below the surface layer of the sea water and around an intake tube 3. The heat from the solar energy 21 is transmitted to the surface layer of the sea water for heating the surface layer. A certain depth of a partition plate may be provided to the heater 22 in order to prevent the flow of the heated surface layer of the sea water by tidal current. The difference of temperature between the surface and deep layers of the sea water is increased, the efficiency of the evaporation and condensation heat cycles of working fluid is raised, and therefore, the efficiency of power generation is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention provides a seawater power generation device f! More specifically, it relates to a power generation device using seawater that generates electricity by driving a prime mover using a thermal cycle in which a fluid with a low boiling point is evaporated and condensed by seawater having a temperature difference.

Conventionally, there has been a device of this type as shown in FIG.

In the figure, an intake pipe J that is connected to the water intake pump and pumps up surface seawater is inserted into the ocean L, and a surface seawater conduit pipe G that is connected to the outlet side pressure of the water intake pump λ is connected to the evaporator S. The evaporator 5 has a function of evaporating a low boiling point fluid using surface seawater, and is connected via an inlet valve S to a turbine 7 which is a prime mover to which a generator 6 is connected.

The intake pump 9 has an intake pipe I whose lower end is inserted into deep seawater.
O-power is continuously applied, and the outlet side of the water intake pump is connected to the water conduit/
/ is connected to condenser /2 via /. Condenser/2
The exhaust side of the turbine 7 is connected to the condenser/,
2 condenses the exhaust steam of the turbine 7 with deep seawater introduced by the water conduit //. Evaporator S and condenser 7.2
A working fluid pump 13 and a drain pipe for circulating working fluid are disposed between them.

With the above configuration, a low boiling point fluid is introduced into the loop of the condenser/secondary evaporator 5. When the water intake pump λ is operated and the surface seawater of the ocean L is introduced into the evaporator 5 through the water intake pipe 3 and the water conduit pipe, the low boiling point fluid is vaporized in the evaporator S. This steam is fed to the turbine 7 by opening the large mouth valve g, and electric power can be obtained from the generator 6 by driving the turbine 7. The exhaust steam after Turbits operation is sent to the condenser 7.
2, on the other hand, the water intake pump t is operated to pump deep seawater, which has a lower temperature than the surface seawater, to the water intake pipe /θ,? The turbine exhaust steam is condensed and liquefied by being introduced into the condenser/2 through the rtI water pipe/l. This condensed low-boiling fluid is returned to the evaporator 5 by the working fluid pump/3.

However, with the conventional device described above, the temperature difference between surface seawater and deep seawater is not sufficient. It was necessary to take measures such as heating the seawater with another heat source.

However, extending the water intake pipe 10 involves technical difficulties.
Heating surface seawater using the other heat source has drawbacks such as the need for petroleum-based energy.

This invention was made in view of the above circumstances, and aims to utilize natural energy even more effectively.
The purpose of the present invention is to provide a power generation device using seawater that increases the temperature of the surface seawater by providing a means for further heating the surface seawater using solar heat, increases the temperature difference between the surface seawater and deep seawater, and improves the efficiency of the system. It is something.

An embodiment of the present invention will be described below with reference to FIG.

In the figure, a seawater heater 22 is provided which is heated by sunlight λ/ and transmits the heat to the surface seawater, and a water intake pipe 3 is provided.
into heated surface seawater. The other parts are the same as the conventional device described above, and their explanation will be omitted.

In such a configuration, the seawater heater 2 is distributed around the water intake pipe 3 at or below the surface seawater surface so as to have a light-receiving surface of an appropriate size, and receives sunlight, 2/2
This heat is transferred to the surface seawater to heat the surface seawater. Surface seawater that has been heated in this way has a higher temperature than surface seawater that has not. When this heated surface seawater is guided to the evaporator S by operating the water intake pumpco, the vaporization of the low boiling point fluid is promoted, the amount of steam increases, the driving force of the turbine 7 increases, and therefore the power generator power generation will increase.

Note that the seawater heater-1 may be provided with a partition plate having a certain depth so that the heated surface seawater is not washed away by the current. This seawater heater, 2.2, may be placed either above or below the water surface.

In the above embodiment, the seawater heater 2.2 was provided, but as shown in Fig. 3, the seawater heater 2.2 is used as an intake pipe and a water conduit pipe for surface seawater, and is heated by sunlight, and the seawater passing through the pipe is heated by the seawater. Heating water intake pipe No. 3 and heating water conduit pipe No. 2 may be adopted, which have heated objects wrapped around them to increase the temperature of the surface seawater and increase the heat transfer characteristics to the surface seawater, and the same effect can be obtained. is obtained.

As described above, this invention uses sunlight to heat the surface seawater taken in before it is introduced into the evaporator, increasing the temperature difference between the surface seawater and deep seawater. Evaporation of working fluid.

It has the effect of increasing the efficiency of the condensing heat cycle and increasing power generation capacity.

[Brief explanation of drawings]

FIG. 1 is a system diagram of a conventional device, FIG. 2 is a system diagram of the main part of an embodiment of the present invention, and FIG. 3 is a diagram of the main part of another embodiment. /... Ocean, λ... Water intake pump, 3... Water intake pipe, f...
Water pipe, S...Evaporator, 6...Power generation, machine, 7...Turbine,...Inlet valve, 9...Water intake pump, /θ...Water intake pipe, //...Water pipe, /, 2・・Condenser, /3・・Working fluid pump, /・・Drain pipe, etc.・Sunlight 1.2.2
・・Seawater heater, 2J・・Heating water intake pipe, 24t・・Heating water pipe. In each figure, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] (1) In the power generation P2, which has an evaporator and a condenser and drives the prime mover by causing a thermal cycle of evaporation and II+condensation in the low boiling point fluid due to the temperature difference between surface seawater and deep seawater, A power generation device using seawater, characterized in that a heating means using solar heat is provided in a water intake section of the seawater to the evaporator. (g) Claims in which the heating means is a seawater heater disposed in the surface seawater area where the Table N4s water intake pipe is located Hull/
A power generation device using seawater as described in Section 1. (,?) The seawater power generation device k according to claim 1, wherein the heating means is a heated water intake pipe and a heated water conduit pipe for surface seawater around which a heated material is wound.