CN219181427U - Small-sized offshore solar thermoelectric power generation device - Google Patents

Abstract

The utility model discloses a small-sized offshore solar thermoelectric power generation device, which solves the problems of high equipment maintenance cost, short service life and inapplicability to miniaturization of the existing equipment; the solar energy heat collection device comprises seawater (6), wherein a heat insulation box body (5) floats in the seawater (6), a solar energy heat collection assembly (1) is arranged on the top end surface of the heat insulation box body (5), a thermoelectric generation unit frame (2) is connected on the bottom end surface of the heat insulation box body (5), a sea wave energy diaphragm pump (3) is connected on the lower bottom surface of the thermoelectric generation unit frame (2), and a closed box space is formed by the solar energy heat collection assembly (1), the heat insulation box body (5), the thermoelectric generation unit frame (2) and the sea wave energy diaphragm pump (3); the heat transfer medium circulates in an upper closed system to complete the task of converting heat energy into electric energy; the service life is long, and the maintenance cost is low.

Description

Small-sized offshore solar thermoelectric power generation device

Technical Field

The utility model relates to a power generation device utilizing solar energy, in particular to a small-sized offshore solar thermoelectric power generation device and a power generation method thereof.

Background

The existing offshore solar power generation equipment is basically similar to a solar power generation device on land, and generates power by adopting a photovoltaic panel; in recent years, a technical scheme of generating electricity by utilizing temperature difference is presented, wherein high-temperature steam is utilized to enter a turbine, and the turbine is used for converting the temperature difference into mechanical energy and then converting the mechanical energy into electric energy; the temperature difference power generation technical scheme has the problems that the system is complex, the system is only suitable for large-scale power generation places, the system is not suitable for miniaturized places, the flexibility of the system is poor, the maintenance frequency of mechanical equipment and rotating parts is high, the maintenance cost is high, and the service life of the equipment is short.

Disclosure of Invention

The utility model provides a small-sized offshore solar thermoelectric power generation device, which solves the technical problems of high equipment maintenance cost, short service life and unsuitability for miniaturization of the existing equipment.

The small-sized offshore solar thermoelectric power generation device comprises seawater, wherein a heat insulation box body floats in the seawater, a solar heat collection assembly is arranged on the top end face of the heat insulation box body, a thermoelectric power generation unit frame is connected on the bottom end face of the heat insulation box body, a sea wave energy diaphragm pump is connected on the lower bottom face of the thermoelectric power generation unit frame, and a closed box space is formed by the solar heat collection assembly, the heat insulation box body, the thermoelectric power generation unit frame and the sea wave energy diaphragm pump; the top end of the solar heat collection assembly is provided with a transparent glass cover plate which can transmit sunlight, a square outer shell of the heat insulation box body and the transparent glass cover plate on the top end face of the square outer shell form a solar heat collection closed space, parallel copper pipe rows are arranged in the solar heat collection closed space, one ends of the parallel copper pipe rows are communicated with a heat exchange rear heat transfer medium collecting pipe, and the other ends of the parallel copper pipe rows are communicated with a heat absorption rear heat transfer medium collecting pipe; the outer side vertical surfaces of the periphery of the thermoelectric generation unit frame are provided with outer heat exchange plates with radiating fins, four outer heat exchange plates form an outer heat exchange plate frame of the square thermoelectric generation unit frame, a thermoelectric generation semiconductor plate is arranged on the inner side surface of the outer heat exchange plates, an inner heat exchange plate is arranged on the inner side surface of the thermoelectric generation semiconductor plate, a serpentine flow channel for heat transfer medium circulation is arranged in the inner heat exchange plate, serpentine flow channels in the four inner heat exchange plates are connected end to end in sequence, a power generation unit heat transfer medium inlet is arranged at one end of the serpentine flow channel, and a power generation unit heat transfer medium outlet is arranged at the other end of the serpentine flow channel; the upper end of the wave energy diaphragm pump is provided with a diaphragm pump cavity, the peripheral outer side surfaces of the diaphragm pump cavity are connected with four inner side vertical surfaces of the outer heat exchange plate frame in a sealing way, the upper top surface of the diaphragm pump cavity is respectively provided with a diaphragm pump heat transfer medium outlet and a diaphragm pump heat transfer medium inlet, the lower bottom surface of the diaphragm pump cavity is provided with a diaphragm, a connecting column is connected with the lower end of the connecting column, the lower end of the connecting column is connected with a square damping diaphragm plate, a heat transfer medium can only go out and can not go in a check valve in the diaphragm pump heat transfer medium outlet, and a heat transfer medium can only go in and out of the check valve in the diaphragm pump heat transfer medium inlet; the heat absorption back heat transfer medium header is provided with a heat transfer medium outlet, the heat transfer medium outlet is communicated with a power generation unit heat transfer medium inlet, the power generation unit heat transfer medium outlet is communicated with a diaphragm pump heat transfer medium inlet, and the diaphragm pump heat transfer medium outlet is communicated with a cold medium input port on the heat exchange back heat transfer medium header.

A heat conducting copper plate is arranged between two adjacent copper pipes in the copper pipe row; a sealant is arranged between the transparent glass cover plate and the heat insulation box body; the serpentine flow channels on two adjacent inner heat exchange plates are communicated together through a circulating pipe.

The construction and working method of the small-sized offshore solar thermoelectric power generation device comprises the steps of seawater, wherein a heat insulation box body floats in the seawater, a solar heat collection assembly is arranged on the top end face of the heat insulation box body, a thermoelectric power generation unit frame is connected to the bottom end face of the heat insulation box body, a sea wave energy diaphragm pump is connected to the lower bottom face of the thermoelectric power generation unit frame, and a closed box space is formed by the solar heat collection assembly, the heat insulation box body, the thermoelectric power generation unit frame and the sea wave energy diaphragm pump; the method is characterized by comprising the following steps of:

firstly, processing a square outer shell of a heat insulation box body, wherein a heat exchange heat transfer medium header, a copper pipe row and a heat absorption heat transfer medium header are respectively arranged in the square outer shell of the box body, one end of the copper pipe row which is connected in parallel is communicated with the heat exchange heat transfer medium header, and the other end of the copper pipe row which is connected in parallel is communicated with the heat absorption heat transfer medium header; a transparent glass cover plate is arranged at the top end of the square outer shell, so that the heat insulation box body forms a solar heat collection airtight space for receiving solar illumination;

secondly, processing an inner heat exchange plate, wherein a serpentine flow passage for circulating a heat transfer medium is arranged in the inner heat exchange plate; the outer heat exchange plate is processed, and radiating fins are arranged on the outer side elevation of the outer heat exchange plate; four outer heat exchange plates form an outer heat exchange plate frame of a square thermoelectric power generation unit frame, a thermoelectric power generation semiconductor plate is arranged on the inner side surface of the outer heat exchange plate, an inner heat exchange plate is arranged on the inner side surface of the thermoelectric power generation semiconductor plate, serpentine flow channels in the four inner heat exchange plates are sequentially connected end to end, a power generation unit heat transfer medium inlet is arranged at one end of each serpentine flow channel, and a power generation unit heat transfer medium outlet is arranged at the other end of each serpentine flow channel;

thirdly, connecting the thermoelectric generation unit frame processed in the second step to the lower bottom surface of the heat insulation box body processed in the first step; the heat transfer medium inlet of the power generation unit is communicated with the heat absorption back heat transfer medium header;

fourthly, connecting the sea wave energy diaphragm pump to the lower bottom surface of the thermoelectric generation unit frame; the upper end of the wave energy diaphragm pump is provided with a diaphragm pump cavity, the peripheral outer side surfaces of the diaphragm pump cavity are connected with four inner side vertical surfaces of the outer heat exchange plate frame in a sealing way, a diaphragm pump heat transfer medium outlet and a diaphragm pump heat transfer medium inlet are respectively arranged on the upper top surface of the diaphragm pump cavity, a connecting column is connected to a diaphragm on the lower bottom surface of the diaphragm pump cavity, the lower end of the connecting column is connected with a square damping diaphragm plate, a heat transfer medium can only go out and can not go in a check valve in the diaphragm pump heat transfer medium outlet, and a heat transfer medium can only go in and out a check valve in the diaphragm pump heat transfer medium inlet; a heat medium outlet is arranged on the heat-absorbing heat-transfer medium header, the heat medium outlet is communicated with a heat medium inlet of the power generation unit, the heat medium outlet of the power generation unit is communicated with a heat medium inlet of the diaphragm pump, and the heat medium outlet of the diaphragm pump is communicated with a cold medium inlet on the heat-exchanging heat-transfer medium header;

fifthly, injecting the heat transfer medium into a circulating flow space of the heat transfer medium, which is formed by a heat exchange heat transfer medium header, a copper pipe row connected in parallel, a heat absorption heat transfer medium header, serpentine flow channels in four inner heat exchange plates and a diaphragm pump cavity;

step six, putting the solar thermoelectric generation device completed in the step five into sea water, and floating the solar thermoelectric generation device on the sea surface;

seventh, the sea wave moves up and down through the square damping diaphragm plate, so that the volume of the diaphragm pump cavity contracts and expands along with the sea wave, and the heat transfer medium repeatedly circulates in the circulating flow space of the heat transfer medium in the fifth step; at the same time, the heat transfer medium flowing through the copper pipe row absorbs solar illumination and is heated, the heated heat transfer medium enters into the serpentine flow channel, the inner side and the outer side of the thermoelectric power generation semiconductor plate form a temperature difference, power generation work is completed, namely, heat energy of the heat transfer medium is converted into electric energy, the cooled heat transfer medium enters into the cavity of the diaphragm pump, is pushed by sea waves and is pumped into the heat transfer medium header after heat exchange, the heat transfer medium entering into the heat transfer medium header after heat exchange flows through the copper pipe row again to absorb solar illumination, and the cycle is performed to generate power.

The power generation system has simple structure, does not need a complex water turbine system, has low manufacturing cost and is easy to realize miniaturization. Because there is no mechanical rotating part inside, the service life is also relatively high, and the maintenance cost is low.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of the heat insulating box 5 of the present utility model;

fig. 3 is a schematic structural view of the thermoelectric generation unit frame 2 of the present utility model;

fig. 4 is a schematic structural view of the wave energy diaphragm pump 3 of the present utility model.

Detailed Description

The utility model is described in detail below with reference to the attached drawing figures:

the small-sized offshore solar thermoelectric power generation device comprises seawater 6, wherein a heat insulation box body 5 floats in the seawater 6, a solar heat collection assembly 1 is arranged on the top end face of the heat insulation box body 5, a thermoelectric power generation unit frame 2 is connected to the bottom end face of the heat insulation box body 5, a sea wave energy diaphragm pump 3 is connected to the lower bottom face of the thermoelectric power generation unit frame 2, and a closed box-shaped space is formed by the solar heat collection assembly 1, the heat insulation box body 5, the thermoelectric power generation unit frame 2 and the sea wave energy diaphragm pump 3; the top end of the solar heat collection assembly 1 is provided with a transparent glass cover plate 11 which can transmit sunlight, a square outer shell 12 of the heat insulation box body 5 and the transparent glass cover plate 11 on the top end face form a solar heat collection closed space, parallel copper pipe rows 13 are arranged in the solar heat collection closed space, one end of each parallel copper pipe row 13 is communicated with a heat exchange rear heat transfer medium header 14, and the other end of each parallel copper pipe row 13 is communicated with a heat absorption rear heat transfer medium header; the four outer heat exchange plates 21 form a square outer heat exchange plate frame of the thermoelectric power generation unit frame, a thermoelectric power generation semiconductor plate 22 is arranged on the inner side surface of the outer heat exchange plate 21, an inner heat exchange plate 23 is arranged on the inner side surface of the thermoelectric power generation semiconductor plate 22, a serpentine flow channel 24 for circulating heat transfer medium is arranged in the inner heat exchange plate 23, serpentine flow channels 24 in the four inner heat exchange plates 23 are connected end to end in sequence, a power generation unit heat transfer medium inlet 25 is arranged at one end of the serpentine flow channel 24, and a power generation unit heat transfer medium outlet is arranged at the other end of the serpentine flow channel 24; the upper end of the wave energy diaphragm pump 3 is provided with a diaphragm pump cavity 33, the peripheral outer side surfaces of the diaphragm pump cavity 33 are connected with four inner side vertical surfaces of an outer heat exchange plate frame in a sealing way, a diaphragm pump heat transfer medium outlet 35 and a diaphragm pump heat transfer medium inlet 36 are respectively arranged on the upper top surface of the diaphragm pump cavity 33, a diaphragm 321 on the lower bottom surface of the diaphragm pump cavity 33 is connected with a connecting column 322, the lower end of the connecting column 322 is connected with a square damping diaphragm plate 32, a heat transfer medium can only enter a check valve 34 in the diaphragm pump heat transfer medium outlet 35, and a heat transfer medium can only enter the check valve 31 in the diaphragm pump heat transfer medium inlet 36; the heat-absorbing heat-back heat-transfer medium header is provided with a heat-transfer medium outlet which is communicated with the power generation unit heat-transfer medium inlet 25, the power generation unit heat-transfer medium outlet is communicated with the diaphragm pump heat-transfer medium inlet 36, and the diaphragm pump heat-transfer medium outlet 35 is communicated with the cold-medium inlet on the heat-exchanging heat-transfer medium header 14.

A heat conducting copper plate 15 is arranged between two adjacent copper pipes in the copper pipe row 13; a sealant 16 is arranged between the transparent glass cover plate 11 and the heat insulation box body 5; the serpentine flow passages 24 on the adjacent two inner heat exchange plates 23 are connected together through the circulation pipe 4.

The construction and working method of the small-sized offshore solar thermoelectric power generation device comprises sea water 6, a heat insulation box body 5 floats in the sea water 6, a solar heat collection assembly 1 is arranged on the top end face of the heat insulation box body 5, a thermoelectric power generation unit frame 2 is connected to the bottom end face of the heat insulation box body 5, a sea wave energy diaphragm pump 3 is connected to the lower bottom face of the thermoelectric power generation unit frame 2, and a closed box space is formed by the solar heat collection assembly 1, the heat insulation box body 5, the thermoelectric power generation unit frame 2 and the sea wave energy diaphragm pump 3; the method is characterized by comprising the following steps of:

firstly, processing a square outer shell 12 of a heat insulation box body 5, wherein a heat exchange heat transfer medium header 14, a copper pipe row 13 and a heat absorption heat transfer medium header are respectively arranged in the square outer shell 12 of the box body, one end of the copper pipe row 13 which is connected in parallel is communicated with the heat exchange heat transfer medium header 14, and the other end of the copper pipe row 13 which is connected in parallel is communicated with the heat absorption heat transfer medium header; a transparent glass cover plate 11 is arranged at the top end of the square outer shell 12, so that the heat insulation box body 5 forms a solar heat collection airtight space for receiving solar illumination;

secondly, processing an inner heat exchange plate 23, and arranging a serpentine runner 24 for circulating a heat transfer medium in the inner heat exchange plate 23; an outer heat exchange plate 21 is processed, and radiating fins are arranged on the outer vertical surface of the outer heat exchange plate 21; four outer heat exchange plates 21 are used for forming an outer heat exchange plate frame of a square thermoelectric power generation unit frame, a thermoelectric power generation semiconductor plate 22 is arranged on the inner side surface of the outer heat exchange plate 21, an inner heat exchange plate 23 is arranged on the inner side surface of the thermoelectric power generation semiconductor plate 22, serpentine flow channels 24 in the four inner heat exchange plates 23 are sequentially connected end to end, a power generation unit heat transfer medium inlet 25 is arranged at one end of each serpentine flow channel 24, and a power generation unit heat transfer medium outlet is arranged at the other end of each serpentine flow channel 24;

thirdly, connecting the thermoelectric generation unit frame 2 processed in the second step to the lower bottom surface of the heat insulation box body 5 processed in the first step; and communicates the power generation unit heat transfer medium inlet 25 with the heat absorption rear heat transfer medium header;

fourthly, connecting the sea wave energy diaphragm pump 3 to the lower bottom surface of the thermoelectric generation unit frame 2; the upper end of the wave energy diaphragm pump 3 is provided with a diaphragm pump cavity 33, the peripheral outer side surfaces of the diaphragm pump cavity 33 are connected with four inner side vertical surfaces of an outer heat exchange plate frame in a sealing way, a diaphragm pump heat transfer medium outlet 35 and a diaphragm pump heat transfer medium inlet 36 are respectively arranged on the upper top surface of the diaphragm pump cavity 33, a diaphragm 321 on the lower bottom surface of the diaphragm pump cavity 33 is connected with a connecting column 322, the lower end of the connecting column 322 is connected with a square damping diaphragm plate 32, a heat transfer medium can only enter a check valve 34 in the diaphragm pump heat transfer medium outlet 35, and a heat transfer medium can only enter the check valve 31 in the diaphragm pump heat transfer medium inlet 36; a heat medium outlet is arranged on the heat-absorbing heat-transfer medium header and is communicated with the power generation unit heat-transfer medium inlet 25, the power generation unit heat-transfer medium outlet is communicated with the diaphragm pump heat-transfer medium inlet 36, and the diaphragm pump heat-transfer medium outlet 35 is communicated with the cold medium inlet on the heat-exchanging heat-transfer medium header 14;

fifthly, injecting a heat transfer medium into a circulating flow space of the heat transfer medium, which is formed by the heat exchange heat transfer medium header 14, the copper pipe tube rows 13 connected in parallel, the heat absorption heat transfer medium header, the serpentine flow channels 24 in the four inner heat exchange plates 23 and the diaphragm pump cavity 33;

step six, putting the solar thermoelectric generation device completed in the steps above into sea water 6, and floating the solar thermoelectric generation device on the sea surface;

seventh, the sea wave moves up and down through the square damping diaphragm plate 32, so that the volume of the diaphragm pump cavity 33 contracts and expands along with the sea wave, and the heat transfer medium repeatedly circulates in the circulating flow space of the heat transfer medium in the fifth step; at the same time, the heat transfer medium flowing through the copper pipe row 13 absorbs solar illumination and is heated, the heated heat transfer medium enters the serpentine flow channel 24, the inner side and the outer side of the thermoelectric power generation semiconductor plate 22 form a temperature difference, the power generation work is completed, namely, the heat energy of the heat transfer medium is converted into electric energy, the cooled heat transfer medium enters the diaphragm pump cavity 33 and is pumped into the heat transfer medium header 14 after heat exchange by being pushed by sea waves, the heat transfer medium entering the heat transfer medium header 14 after heat exchange flows through the copper pipe row 13 again to absorb solar illumination, and the power generation is performed in a circulating way.

The utility model realizes miniaturization and modularization of the offshore solar thermoelectric power generation device and reduces equipment maintenance cost; the solar energy is utilized to heat the heat transfer medium, the temperature difference between the heated heat transfer medium and the seawater is utilized to generate electricity, the circulation of the heat transfer medium is realized by directly utilizing the wave energy of the seawater without electric drive; the utility model is divided into three parts in total, namely a solar collector component 1, four thermoelectric generation components 2 and a sea wave energy diaphragm pump 3; the solar heat collector component 1 is arranged at the top of the summarizing structure and is used for absorbing solar energy, the heat transfer medium and the thermoelectric generation components are distributed on the surrounding vertical surfaces, and the thermoelectric generation components generate electricity by utilizing the temperature difference between the medium and seawater; the wave energy diaphragm pump 3 is arranged at the bottom of the total structure, and the wave energy of the wave is utilized to drive the medium to circulate; the three parts are communicated by using a 4-circulation pipeline to realize the circulation flow of the heat transfer medium, and the whole equipment is placed in a seawater environment and floats on the water surface; the specific working principle of each part is as follows: the solar heat collector assembly 1 is of various types, the flat plate type heat collector is shown in fig. 2, the flat plate type heat collector consists of a transparent glass cover plate 11, a square outer shell 12 of the heat collector, copper pipe rows 13, a header pipe, a heat conducting copper plate and sealant, the square outer shell 12 is wrapped by the transparent stripping cover plate, the heat collector is sealed by the sealant, seawater is prevented from entering the heat collector, the copper pipe rows are laid flat, two ends of the copper pipe rows are welded with the header pipe and are communicated with each other, and the copper pipe rows are welded together by the heat conducting copper plate, so that the absorbed heat is more balanced; when the heat transfer medium enters the header pipe on the other side from the header pipe on one side through the pipe discharge, the temperature of the heat transfer medium is increased due to the heat absorbed by the pipe discharge, and the increased heat transfer medium stores the absorbed solar energy; the radiating fins are in direct contact with the seawater, and heat is introduced into the seawater, so that the outer side of the thermoelectric generation semiconductor 22 is at low temperature; the inner heat exchange plate 23 is internally provided with a serpentine flow passage 24, and a heat exchange medium enters the heat exchanger from a heat exchange medium inlet 25 of the power generation unit, flows out from a heat exchange medium outlet of the power generation unit after passing through the serpentine flow passage 24, and transfers heat of the heat exchange medium to the inner side of the thermoelectric power generation semiconductor 22 so as to raise the temperature of the thermoelectric power generation semiconductor. Through the functions of the radiating fins 21 and the heat exchanger 23, the two sides of the thermoelectric power generation semiconductor 22 have higher temperature difference, so that heat is promoted to flow through the semiconductor, and electromotive force is generated, namely the principle of thermoelectric power generation by the thermoelectric semiconductor; the utility model floats on the sea surface, along with the fluctuation of waves, the square damping diaphragm plate 32 can not immediately float up along with the whole device due to the blocking of sea water in the process of floating up the device along with the sea, but has hysteresis, the diaphragm 321 at the bottom receives downward pulling force under the action of the connecting column 322, so that the cavity 33 of the diaphragm pump is increased, the pressure in the cavity is reduced, the heat transfer medium can only be closed by the non-return valve 34 and can only be opened by the non-return valve 31, and the heat transfer medium enters the cavity from the heat transfer medium inlet 36 of the diaphragm pump; in the sinking process of the device along with sea waves, the square damping diaphragm plate 32 cannot immediately sink along with the whole device due to being blocked by sea water, but has hysteresis, under the action of the connecting column 322, the diaphragm pump cavity 33 receives upward thrust, so that the volume of the diaphragm pump cavity 33 is reduced, the pressure in the cavity is increased, the heat transfer medium can only enter and not exit the check valve 31 to be closed, the heat transfer medium can only exit and not enter the check valve 34 to be jacked up, the heat transfer medium leaves the cavity from the diaphragm pump heat transfer medium outlet 35, and the process is repeated continuously along with the fluctuation of the sea waves, so that the circulation of the heat transfer medium is realized.

Claims (2)

1. The utility model provides a small-size marine solar thermoelectric power generation device, including sea water (6), float in sea water (6) has heat-insulating box (5), be provided with solar collector module (1) on the top face of heat-insulating box (5), be connected with thermoelectric power generation unit frame (2) on the bottom face of heat-insulating box (5), be connected with wave energy diaphragm pump (3) on the lower bottom surface of thermoelectric power generation unit frame (2), solar collector module (1), heat-insulating box (5), thermoelectric power generation unit frame (2) and wave energy diaphragm pump (3), constitute a inclosed box space; the solar heat collection device is characterized in that a transparent glass cover plate (11) capable of transmitting sunlight is arranged at the top end of a solar heat collection assembly (1), a square outer shell (12) of a heat insulation box body (5) and the transparent glass cover plate (11) on the top end face of the square outer shell form a solar heat collection closed space, a copper pipe row (13) which is connected in parallel is arranged in the solar heat collection closed space, one end of the copper pipe row (13) which is connected in parallel is communicated with a heat exchange rear heat transfer medium header (14), and the other end of the copper pipe row (13) which is connected in parallel is communicated with a heat absorption rear heat transfer medium header; an outer heat exchange plate (21) with radiating fins is arranged on the outer side vertical surface of the periphery of the thermoelectric generation unit frame (2), the four outer heat exchange plates (21) form an outer heat exchange plate frame of the square thermoelectric generation unit frame, a thermoelectric generation semiconductor plate (22) is arranged on the inner side surface of the outer heat exchange plate (21), an inner heat exchange plate (23) is arranged on the inner side surface of the thermoelectric generation semiconductor plate (22), a serpentine flow channel (24) for circulating a heat transfer medium is arranged in the inner heat exchange plate (23), the serpentine flow channels (24) in the four inner heat exchange plates (23) are sequentially connected end to end, a heat transfer medium inlet (25) of a power generation unit is arranged at one end of the serpentine flow channel (24), and a heat transfer medium outlet of the power generation unit is arranged at the other end of the serpentine flow channel (24); the upper end of the wave energy diaphragm pump (3) is provided with a diaphragm pump cavity (33), the peripheral outer side surfaces of the diaphragm pump cavity (33) are connected with four inner side vertical surfaces of an outer heat exchange plate frame in a sealing way, a diaphragm pump heat transfer medium outlet (35) and a diaphragm pump heat transfer medium inlet (36) are respectively arranged on the upper top surface of the diaphragm pump cavity (33), a connecting column (322) is connected to a diaphragm (321) on the lower bottom surface of the diaphragm pump cavity (33), the lower end of the connecting column (322) is connected with a square damping diaphragm plate (32), a heat transfer medium only can not enter a check valve (34) in the diaphragm pump heat transfer medium outlet (35), and a heat transfer medium only can not enter the check valve (31) in the diaphragm pump heat transfer medium inlet (36); the heat absorption back heat transfer medium header is provided with a heat transfer medium outlet which is communicated with a power generation unit heat transfer medium inlet (25), the power generation unit heat transfer medium outlet is communicated with a diaphragm pump heat transfer medium inlet (36), and a diaphragm pump heat transfer medium outlet (35) is communicated with a cold medium inlet on the heat exchange back heat transfer medium header (14).

2. A small-sized offshore solar thermoelectric generation device according to claim 1, characterized in that a heat conducting copper plate (15) is arranged between two adjacent copper tubes in the copper tube row (13); a sealant (16) is arranged between the transparent glass cover plate (11) and the heat insulation box body (5); the serpentine flow channels (24) on two adjacent inner heat exchange plates (23) are communicated together through the circulating pipe (4).

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