CN112271980A - Light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation - Google Patents

Light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation Download PDF

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CN112271980A
CN112271980A CN202011269761.9A CN202011269761A CN112271980A CN 112271980 A CN112271980 A CN 112271980A CN 202011269761 A CN202011269761 A CN 202011269761A CN 112271980 A CN112271980 A CN 112271980A
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heat
photovoltaic
water
thermal
power generation
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季杰
温馨
宋智莹
李照萌
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University of Science and Technology of China USTC
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University of Science and Technology of China USTC
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S10/00PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
    • H02S10/10PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N11/00Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
    • H02N11/002Generators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/20Optical components
    • H02S40/22Light-reflecting or light-concentrating means
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02SGENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/40Thermal components
    • H02S40/44Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/52PV systems with concentrators
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/60Thermal-PV hybrids

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Abstract

The invention relates to a light-gathering heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation, and belongs to the technical field of energy utilization. The solar thermal collector comprises a Fresnel lens, a photovoltaic and heat collecting mechanism, a thermoelectric generation piece, a cooling mechanism and a heat recovery mechanism; the photovoltaic and heat collection mechanism comprises a photovoltaic cell, a heat absorption plate, a heat pipe and a first heat preservation layer which are arranged in the metal box body from top to bottom; the Fresnel lens is positioned above the photovoltaic cell; the thermoelectric generation piece and the cooling mechanism comprise a condensation end of the heat pipe, a heat exchange plate, a thermoelectric generation piece, a water-cooling radiator and a second heat preservation layer which are fixedly connected from top to bottom in sequence; the heat recovery mechanism comprises a water pipe, a water pump and a water tank which are sequentially communicated to form a water circulation system; the photovoltaic cell is electrically connected with the thermoelectric generation sheet, the inverter and the storage battery to form an electric energy recovery system. The light-concentrating heat pipe type photovoltaic photo-thermal system realizes three energy conversions of photovoltaic power generation, thermoelectric power generation of a thermoelectric power generation piece and heat recovery and utilization of a water tank, and the comprehensive utilization efficiency of solar photovoltaic photo-thermal is 73.71%.

Description

Light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation
Technical Field
The invention belongs to the technical field of energy utilization, and particularly relates to comprehensive application of solar photovoltaic and photothermal.
Technical Field
Energy is an important foundation and support for national prosperity and economic sustainable development. As the development and utilization of fossil energy are extremely harmful to the environment, renewable energy is widely concerned by people. Solar energy is one of new energy utilization forms, is clean and environment-friendly, and is inexhaustible. The continuous progress of the technology and the improvement of the solar energy utilization efficiency are two problems which need to be solved in the current solar energy utilization.
The solar photovoltaic photo-thermal comprehensive utilization technology combines a photovoltaic cell and a solar heat collection technology, when solar energy is converted into electric energy, redundant heat of the cell is taken away by a cooling medium in a heat collection assembly and utilized, and two kinds of energy of electricity and heat can be obtained simultaneously. The technology can improve the comprehensive utilization efficiency of solar energy, meet the hot water demand of common users and provide part of available electric energy. The technology can reduce the cost and has the advantages of flexible configuration of electric and heat output and the like.
The semiconductor thermoelectric power generation sheet is a solid-state heat engine, and converts heat energy generated by the temperature difference between a high-temperature end and a low-temperature end acting on the semiconductor thermoelectric power generation sheet into electric energy through the Seebeck effect, so that effective electric power output is obtained. At present, the system that combines photovoltaic light and heat integrated utilization device and thermoelectric generation piece is the attached thermoelectric generation piece in photovoltaic cell's below mostly, makes photovoltaic cell's heat direct transfer to the high temperature end of thermoelectric generation piece, and the low temperature end of thermoelectric generation piece links to each other with the absorber plate that the below welding has the copper pipe, takes away the heat through rivers, realizes retrieving hot water, the secondary power generation's of completion system effect simultaneously. However, the thermoelectric power generation piece is used as a device with certain thermal resistance, which hinders heat transfer to a certain extent and reduces heat gain, and the initial temperature of the water tank is 15 ℃, the environmental temperature is 18 ℃, and the environmental temperature is 800W/m2Under the irradiation conditions of (1), the water tank temperature is only 20.15 ℃ after the system is operated for one day. And the thermoelectric generation piece is directly arranged between the photovoltaic cell and the heat absorption plateIn the process, the temperature difference between the high temperature end and the low temperature end is small, so that the electrical property of the thermoelectric generation piece is limited, and the total electric energy generated by the thermoelectric generation piece after the thermoelectric generation piece operates all day long is only 0.42J.
Therefore, how to properly reduce the adverse effect of the thermoelectric generation piece on the thermal performance of the photovoltaic and photo-thermal comprehensive utilization system, improve the electrical performance of the thermoelectric generation piece in the system application, and improve the solar photovoltaic and photo-thermal comprehensive utilization efficiency is a problem to be solved at present.
Disclosure of Invention
In order to improve the electrical property of a system combining a solar photovoltaic photo-thermal comprehensive utilization device and a temperature difference power generation sheet and improve the solar photovoltaic photo-thermal comprehensive utilization efficiency, the invention provides a light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation.
A light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation comprises a flat-plate Fresnel lens 1, a photovoltaic and heat collection mechanism, a thermoelectric power generation sheet, a cooling mechanism and a heat recovery mechanism;
the photovoltaic and heat collection mechanism comprises a photovoltaic cell 2, a heat absorption plate 3, a heat pipe 4, a first heat preservation layer 5 and a metal box body 6; the photovoltaic cell 2, the heat absorbing plate 3, the evaporation ends of the more than two heat pipes 4 and the first heat preservation layer 5 are sequentially arranged in the metal box body 6 from top to bottom;
the Fresnel lens 1 is positioned above the photovoltaic cell 2;
the thermoelectric generation piece and the cooling mechanism comprise a heat exchange plate 7, and the condensation end of the heat pipe 4 is positioned in the hollow interlayer of the heat exchange plate 7; two side surfaces of the heat exchange plate 7 are respectively provided with a thermoelectric generation fin 8, a water-cooled radiator 9 and a second heat preservation layer 10 in sequence;
the heat recovery mechanism comprises a water pipe 11, a water pump 12 and a water tank 13, and the water pipe 11, the water pump 12 and the water tank 13 are communicated in sequence to form a water circulation system; the water-cooled radiator 9 is connected in parallel to the water pipe 11;
the photovoltaic cell 2 and the thermoelectric generation sheet 8 are connected with an inverter 15 and a storage battery 16 through a lead 14 to form an electric energy recovery system;
the photovoltaic cell 2 in the photovoltaic and heat collection mechanism absorbs solar energy, one part of the solar energy is converted into electric energy through a photoelectric effect, and the generated energy of the photovoltaic cell 2 and the thermoelectric generation piece 8 is stored in the storage battery 16 through the inverter 15; the other part of the heat energy is converted into heat energy, the heat energy is absorbed by the heat absorption plate 3 and is transferred to the condensation end through the evaporation end of the heat pipe 4, a high-temperature heat source is provided for the thermoelectric power generation sheet 8, and thermoelectric secondary power generation is realized; the redundant heat is absorbed by circulating water in the water-cooling radiator 9, and high-temperature water after heat exchange enters the water tank 13 from the upper part through the water pipe 11; meanwhile, water in the lower part of the water tank 13 is pumped into the water-cooling radiator 9 by the pressurization pump 12, so that the water is circularly heated.
The distance h between the fresnel lens 1 and the photovoltaic cell 2 is 1.5 m.
The upper surface of the photovoltaic cell 2 is covered with a layer of transparent polyvinyl fluoride composite film (Tedlar-PET-Tedlar, TPT) and a layer of Ethylene Vinyl Acetate Copolymer (EVA) to play a role in protection and support; the photovoltaic cell 2 and the heat absorbing plate 3 are connected through an ethylene-vinyl acetate copolymer and a black polyvinyl fluoride composite film, and the transparent polyvinyl fluoride composite film, the ethylene-vinyl acetate copolymer, the photovoltaic cell 2, the ethylene-vinyl acetate copolymer and the black polyvinyl fluoride composite film are laminated with the heat absorbing plate 3 to form a composite plate.
The photovoltaic cell 2 is a monocrystalline silicon cell.
The heat absorbing plate 3 is a copper plate, an aluminum plate or a stainless steel plate; the heat absorbing plate 3 is provided with more than two grooves with equal distance, and the evaporation ends of more than two heat pipes 4 are respectively and correspondingly positioned in the more than two grooves.
The heat pipe 4 is a gravity type heat pipe, and the coolant inside the heat pipe is R410A.
The first heat-insulating layer 5 and the second heat-insulating layer 10 are made of glass fiber, polyurethane or phenolic resin.
The metal box body 6 is made of aluminum, and the wall thickness of the box body is 14 mm.
The heat exchange plate 7 is made of aluminum, the heat exchange plate 7 is a hollow plate, and the condensation end of the heat pipe 4 is positioned in the hollow interlayer of the heat exchange plate 7.
The model of the thermoelectric generation piece 8 is TGM-287-1.4-1.5.
The beneficial technical effects of the invention are embodied in the following aspects:
1. the invention adopts the linear Fresnel lens for light condensation, and the sunlight is condensed on the small-sized photovoltaic cell, and compared with a non-light-condensation solar system, the invention adopts the Fresnel lens for light condensation to obtain higher energy density. By increasing the concentration ratio of the lens, the area of the photovoltaic cells obtaining the same energy is reduced, so that the number of the photovoltaic cells is reduced, and the cost of the system is reduced. In addition, due to the fact that the linear Fresnel lens is arranged, the energy density of the whole system is improved, the heat flux density of the thermoelectric generation pieces with the same number is increased, the temperature of the high-temperature end of the thermoelectric generation pieces is improved by 26.15 ℃, and the thermoelectric generation piece is beneficial to secondary power generation.
2. The heat pipe is a high-efficiency heat transfer device which transfers heat in a certain distance by a small temperature gradient, and has the characteristics of light weight, quick temperature equalization and the like. When the evaporation end of the heat pipe is heated, liquid in the capillary core is rapidly evaporated, steam flows to the condensation end under the driving of a tiny pressure difference, releases heat, is condensed into liquid again, then flows back to the evaporation end along the inner wall of the pipe under the action of capillary force to circulate, and the heat is continuously transmitted from the evaporation end to the condensation end. The invention uses the heat pipe to solve the problem that the common solar photo-thermal photoelectric comprehensive utilization system can not be used under the cold condition, and simultaneously, the heat pipe can gather larger heat flow to the high-temperature end of the temperature difference power generation piece, so that the temperature of the high-temperature end of the temperature difference power generation piece is increased by 7.6 ℃.
3. Compared with a device for directly attaching the thermoelectric generation piece to the bottom of the photovoltaic cell, the thermoelectric generation piece module is uniformly arranged between the heat exchange plate connected with the condensation end of the heat pipe and the water-cooling radiator, so that the heat transfer resistance between the photovoltaic plate and the heat absorption plate is reduced, and the thermal efficiency of the system is improved by about 10.02%. Meanwhile, high-temperature heat flow converged by the Fresnel lens and the heat pipe acts on a high-temperature end of the thermoelectric generation piece, cooling water directly cools a low-temperature end of the thermoelectric generation piece, the temperature difference of two sides of the thermoelectric generation piece is increased, according to the principle, the power generation effect of the thermoelectric generation piece is more obvious, and the power generation amount of the thermoelectric generation piece in the past all day is increased from 0.42kJ to 90.21kJ under the same condition.
In conclusion, the light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation can effectively utilize low-grade heat energy generated by the system to perform thermoelectric secondary power generation, three types of energy conversion of photovoltaic cell power generation, thermoelectric power generation of thermoelectric power generation pieces and heat recovery and utilization of water tanks are realized, the comprehensive utilization efficiency of solar photovoltaic photo-thermal is 73.71%, and the system has good use and popularization values.
Drawings
Fig. 1 is a structural diagram of a light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperative power generation.
Fig. 2 is a top view of a concentrated heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperative power generation.
Fig. 3 is a detailed diagram of a power generation and heat recovery part of the light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation.
Sequence numbers in the upper figure: fresnel lens 1, photovoltaic cell 2, absorber plate 3, heat pipe 4, first heat preservation 5, metal box 6, heat transfer board 7, thermoelectric generation piece 8, water-cooling radiator 9, second heat preservation 10, water pipe 11, water pump 12, water tank 13, wire 14, inverter 15, battery 16.
Detailed Description
The technical scheme of the invention is clearly and completely described by embodiments in the following with reference to the attached drawings. All embodiments that can be made or obtained by a person skilled in the art based on the embodiments of the present invention are within the scope of the present invention without any inventive step.
Referring to fig. 1, a light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation comprises a flat-plate-shaped fresnel lens 1, a photovoltaic and heat collection mechanism, a thermoelectric generation sheet, a cooling mechanism and a heat recovery mechanism.
The Fresnel lens 1 is positioned above the photovoltaic cell 2, and the distance h between the Fresnel lens 1 and the photovoltaic cell 2 is 1.5 m.
Referring to fig. 1 and 2, the photovoltaic and heat collection mechanism comprises a photovoltaic cell 2, a heat absorption plate 3, three heat pipes 4, a first heat preservation layer 5 and a metal box 6; the photovoltaic cell 2, the heat absorbing plate 3, the evaporation ends of the three heat pipes 4 and the first heat preservation layer 5 are sequentially arranged in the metal box body 6 from top to bottom.
The photovoltaic cell 2 is a monocrystalline silicon cell with the size of 125mm × 125mm, and 8 cells are arranged in series. The heat absorbing plate 3 is an aluminum plate with the size of 175.5mm multiplied by 1100 mm; three equidistant grooves are arranged on the heat absorbing plate 3, and the evaporation ends of the three heat pipes 4 with the outer diameter of 8mm are respectively positioned in the three grooves. The heat pipe 4 is a gravity type heat pipe, and the coolant inside the heat pipe is R410A. The metal box 6 is made of aluminum, and the wall thickness of the box is 14 mm.
The upper surface of the photovoltaic cell 2 is covered with a transparent polyvinyl fluoride composite film and an ethylene-vinyl acetate copolymer, so that the photovoltaic cell plays a role in protection and support; the photovoltaic cell 2 and the heat absorbing plate 3 are connected through an ethylene-vinyl acetate copolymer and a black polyvinyl fluoride composite film, and the transparent polyvinyl fluoride composite film, the ethylene-vinyl acetate copolymer, the photovoltaic cell 2, the ethylene-vinyl acetate copolymer, the black polyvinyl fluoride composite film five-layer material and the heat absorbing plate 3 are pressed to form the composite plate.
The thermoelectric generation piece and the cooling mechanism comprise a condensation end of the heat pipe 4, a heat exchange plate 7, eighteen thermoelectric generation pieces 8, six water-cooled radiators 9 and a second heat preservation layer 10.
The heat exchange plate 7 is made of aluminum, the heat exchange plate 7 is a hollow plate, the condensation end of the heat pipe 4 is positioned in the hollow interlayer of the heat exchange plate 7, and the area of the upper surface and the lower surface of the heat exchange plate 7 is 165mm multiplied by 165 mm. Referring to fig. 1 and 3, nine thermoelectric generation fins 8, three water-cooled radiators 9 and a second insulating layer 10 are respectively and fixedly mounted on two side surfaces of the heat exchange plate 7 in sequence. The model of the thermoelectric generation piece 8 is TGM-287-1.4-1.5, eighteen pieces are arranged on the upper and lower parts, the area of each piece is 55mm multiplied by 55mm, and the pieces are distributed in two rows of 3 multiplied by 3. The material of the water-cooling radiator 9 is aluminum, six blocks are arranged up and down, the area of a single block is 165mm multiplied by 55mm, and the six water-cooling radiators 9 are all water inlet at the same side and water outlet at the same side. The first heat-insulating layer 5 and the second heat-insulating layer 10 are both made of glass fiber, and the second heat-insulating layer 10 covers the outer side surfaces of the three water-cooled radiators 9 for heat insulation.
The heat recovery mechanism comprises a water pipe 11, a water pump 12 and a water tank 13; the upper part of the water tank 13 is provided with a water inlet, and the lower part of the water tank 13 is provided with a water outlet; the water pipe 11, the water pump 12 and the water tank 13 are communicated in sequence to form a water circulation system; six water-cooled radiators 9 are connected in parallel on a water pipe 11.
Referring to fig. 3, the photovoltaic cell 2 and the thermoelectric generation sheet 8 are connected with an inverter 15 and a storage battery 16 through a lead 14 to form an electric energy recovery system. The obtained direct current is inverted into alternating current by using an inverter 15 and the alternating current is connected to a storage battery 16 for electric quantity storage. The inverter 15 is an SN4K28C type inverter manufactured by solar power supply company. The battery 16 is a variable control sealed lead acid battery manufactured by the company Buddy, model number FM12-200, 12V-200AH/20 HR.
The working principle of the invention is explained in detail as follows:
when the light-concentrating heat pipe type photovoltaic photo-thermal system operates, solar radiation linearly concentrated by the Fresnel lens 1 irradiates the photovoltaic cell 2, the photovoltaic cell 2 absorbs the radiation to generate electric energy, and the rest part of the radiation is converted into heat energy; the thermal energy is transferred to the evaporation end of the heat pipe 4 through the heat absorbing plate 3 located below the photovoltaic cell 2. The evaporation end of the heat pipe 4 takes away the heat which is absorbed by the photovoltaic cell 2 and can not be converted into electric energy, and the heat is conveyed to the condensation end of the heat pipe 4 connected with the high-temperature end of the thermoelectric generation piece 8. The water-cooling radiator 9 covers the low-temperature end of the thermoelectric generation piece 8, and the cooling water inside the water-cooling radiator is used for cooling the low-temperature end of the thermoelectric generation piece 8 so as to ensure that a certain temperature difference exists on the cold side and the hot side of the thermoelectric generation piece 8, thereby realizing thermoelectric secondary power generation. Wherein the electric energy generated by the photovoltaic cell 2 and the thermoelectric generation chip 8 is stored in the storage battery 16 through the inverter 15. The waste heat is taken away by the cooling water, and flows into the water tank 13 for storage after the temperature rises, so that the circulating work is realized.
The Fresnel lens 1 effectively improves the solar radiation absorbed by the photovoltaic cell 2, and higher energy density can be obtained by concentrating with the Fresnel lens 1 compared with a non-concentrating solar system. And by increasing the concentration ratio of the lens, the area of the photovoltaic cells 2 obtaining the same energy is reduced, thus reducing the number of photovoltaic cells 2 used. The heat pipe 4 serves as a heat transfer element having a rapid temperature equalization characteristic, and plays a role of rapid heat transfer in the system. The use of the heat pipe 4 can concentrate the heat acting on it to the condensation end, thus concentrating a larger heat flow for the thermoelectric generation chip 8 of the same area. The thermoelectric power generation sheet 8 positioned at the condensation end of the heat pipe 4 not only weakens the adverse effect of the thermoelectric power generation sheet as an element with self thermal resistance to a certain extent in a solar photovoltaic photo-thermal comprehensive utilization system, but also can fully utilize the high heat flow density converged by the Fresnel lens 1 and the heat pipe 4 to carry out high-efficiency power generation, and can better play the role of secondary power generation in the system.
Compared with the common non-light-gathering solar photovoltaic photo-thermal comprehensive utilization system in which the thermoelectric generation piece is attached to the bottom of the photovoltaic cell and is directly cooled by adopting a water pipe, the light-gathering heat pipe type photovoltaic photo-thermal system has the advantages that the initial temperature of the water tank 13 is 15 ℃, the environmental temperature is 18 ℃, and the temperature is 800W/m2After the operation of the thermoelectric generation piece 8 is carried out all day long under the irradiation condition, the generated energy of the thermoelectric generation piece 8 is improved by 89.80kJ, the generated energy of the whole system is improved by 1817.84 kJ, the final temperature of the water tank 13 is increased to 54.25 ℃ from 20.15 ℃, and the electrical property and the thermal property of the system are optimized. Therefore, the hybrid system combining the Fresnel linear lens 1, the heat pipe 4 and the thermoelectric generation piece 8 can effectively improve the comprehensive efficiency of the solar photovoltaic photo-thermal comprehensive utilization device, and has good use and popularization values.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a concentrated heat pipe formula photovoltaic light and heat system based on light and heat cooperation electricity generation which characterized in that: the solar photovoltaic heat collector comprises a flat Fresnel lens (1), a photovoltaic and heat collecting mechanism, a thermoelectric power generation sheet, a cooling mechanism and a heat recovery mechanism;
the photovoltaic and heat collection mechanism comprises a photovoltaic cell (2), a heat absorption plate (3), more than two heat pipes (4), a first heat preservation layer (5) and a metal box body (6); the photovoltaic cell (2), the heat absorption plate (3), the evaporation end of the heat pipe (4) and the heat insulation layer (5) are sequentially arranged in the metal box body (6) from top to bottom;
the Fresnel lens (1) is positioned above the photovoltaic cell (2);
the thermoelectric generation piece and the cooling mechanism comprise a heat exchange plate (7), and the condensation end of the heat pipe (4) is positioned in the hollow interlayer of the heat exchange plate (7); two side surfaces of the heat exchange plate (7) are respectively and sequentially provided with a thermoelectric generation fin (8), a water-cooling radiator (9) and a second heat insulation layer (10);
the heat recovery mechanism comprises a water pipe (11), a water pump (12) and a water tank (13), and the water pipe (11), the water pump (12) and the water tank (13) are communicated in sequence to form a water circulation system; the water-cooling radiator (9) is connected in parallel on the water pipe (11);
the photovoltaic cell (2) and the thermoelectric generation sheet (8) are connected with the inverter (15) and the storage battery (16) through a lead (14) to form an electric energy recovery system;
the photovoltaic cell (2) in the photovoltaic and heat collection mechanism absorbs solar energy, one part of the solar energy is converted into electric energy through a photoelectric effect, and the generated energy of the photovoltaic cell (2) and the thermoelectric generation piece (8) is stored in the storage battery (16) through the inverter (15); the other part of the heat energy is converted into heat energy, is absorbed by the heat absorption plate (3) and is transferred to the condensation end through the evaporation end of the heat pipe (4) to provide a high-temperature heat source for the thermoelectric power generation sheet (8) so as to realize thermoelectric secondary power generation; the redundant heat is absorbed by circulating water in the water-cooling radiator (9), and high-temperature water after heat exchange enters the water tank (13) from the upper part through the water pipe (11); meanwhile, water at the middle lower part of the water tank (13) is pumped into the water-cooling radiator (9) by the pressurization pump (12), so that the water is circularly heated.
2. The light-concentrating heat pipe type photovoltaic and thermal system based on photo-thermal cooperative power generation of claim 1, wherein: the distance h between the Fresnel lens (1) and the photovoltaic cell (2) is 1.5 m.
3. The light-concentrating heat pipe type photovoltaic and thermal system based on photo-thermal cooperative power generation of claim 1, wherein: the upper surface of the photovoltaic cell (2) is covered with a layer of transparent polyvinyl fluoride composite film (Tedlar-PET-Tedlar, TPT) and a layer of Ethylene-Vinyl Acetate Copolymer (EVA) to play a role in protection and support; the photovoltaic cell (2) is connected with the heat absorbing plate (3) through an ethylene-vinyl acetate copolymer and a black polyvinyl fluoride composite film, and the transparent polyvinyl fluoride composite film, the ethylene-vinyl acetate copolymer, the photovoltaic cell (2), the ethylene-vinyl acetate copolymer and the black polyvinyl fluoride composite film are laminated with the heat absorbing plate (3) to form the composite plate.
4. The light-concentrating heat pipe type photovoltaic and thermal system based on photo-thermal cooperative power generation of claim 1, wherein: the photovoltaic cell (2) is a monocrystalline silicon cell.
5. The light-concentrating heat pipe type photovoltaic and thermal system based on photo-thermal cooperative power generation of claim 1, wherein: the heat absorbing plate (3) is a copper plate, an aluminum plate or a stainless steel plate; the heat absorbing plate (3) is provided with more than two equidistant grooves, and the evaporation ends of more than two heat pipes (4) are respectively and correspondingly positioned in more than two equidistant grooves.
6. The light-concentrating heat pipe type photovoltaic and thermal system based on photo-thermal cooperative power generation of claim 1, wherein: the heat pipe (4) is a gravity type heat pipe, and the cooling liquid in the heat pipe is R410A.
7. The light-concentrating heat pipe type photovoltaic and thermal system based on photo-thermal cooperative power generation of claim 1, wherein: the first heat-insulating layer (5) and the second heat-insulating layer (10) are made of glass fiber, polyurethane or phenolic resin.
8. The light-concentrating heat pipe type photovoltaic and thermal system based on photo-thermal cooperative power generation of claim 1, wherein: the metal box body (6) is made of aluminum, and the wall thickness of the box body is 14 mm.
9. The light-concentrating heat pipe type photovoltaic and thermal system based on photo-thermal cooperative power generation of claim 1, wherein: the heat exchange plate (7) is made of aluminum, the heat exchange plate (7) is a hollow plate, and the condensation end of the heat pipe (4) is located in the hollow interlayer of the heat exchange plate (7).
10. The light-concentrating heat pipe type photovoltaic and thermal system based on photo-thermal cooperative power generation of claim 1, wherein: the model of the thermoelectric generation piece (8) is TGM-287-1.4-1.5.
CN202011269761.9A 2020-11-13 2020-11-13 Light-concentrating heat pipe type photovoltaic photo-thermal system based on photo-thermal cooperation power generation Pending CN112271980A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112963322A (en) * 2021-02-08 2021-06-15 杭州首电能源科技有限公司 Photo-thermal hybrid power generation system
CN113179048A (en) * 2021-05-25 2021-07-27 西安石油大学 Temperature difference power generation system and working method thereof
CN116592194A (en) * 2023-06-30 2023-08-15 赫里欧新能源有限公司 Circulating water pipeline connection structure and novel photovoltaic photo-thermal building surface layer system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112963322A (en) * 2021-02-08 2021-06-15 杭州首电能源科技有限公司 Photo-thermal hybrid power generation system
CN113179048A (en) * 2021-05-25 2021-07-27 西安石油大学 Temperature difference power generation system and working method thereof
CN116592194A (en) * 2023-06-30 2023-08-15 赫里欧新能源有限公司 Circulating water pipeline connection structure and novel photovoltaic photo-thermal building surface layer system
CN116592194B (en) * 2023-06-30 2024-04-02 赫里欧新能源有限公司 Circulating water pipeline connection structure and novel photovoltaic photo-thermal building surface layer system

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