CN219227549U

CN219227549U - Solar cell panel cooling system with heat recovery function

Info

Publication number: CN219227549U
Application number: CN202320300542.5U
Authority: CN
Inventors: 周文昊; 周敏; 侯占魁
Original assignee: China Northwest Architecture Design and Research Institute Co Ltd
Current assignee: China Northwest Architecture Design and Research Institute Co Ltd
Priority date: 2023-02-23
Filing date: 2023-02-23
Publication date: 2023-06-20
Anticipated expiration: 2033-02-23

Abstract

The utility model belongs to the technical field of solar power generation, and relates to a solar panel cooling system with a heat recovery function, which comprises the following components: the utility model solves the problem of efficiency reduction caused by overhigh working temperature in the photoelectric conversion process of the solar cell panel, and simultaneously heats a building or provides domestic hot water in winter, thereby improving the power generation efficiency of the solar cell panel with high efficiency and low energy consumption and realizing the effective recovery of waste heat and the high-efficiency utilization of energy.

Description

Solar cell panel cooling system with heat recovery function

Technical Field

The utility model belongs to the technical field of solar power generation, and relates to a solar panel cooling system with a heat recovery function.

Background

In recent years, with the promotion of wide and high effect on renewable energy sources and the promotion of the aim of double carbon in China in various countries of the world, the rapid development of the photovoltaic industry is promoted, in the installation aspect, solar photovoltaic systems are not only installed on the ground surface on a large scale to become photovoltaic power stations, but are more used for civil houses and commercial buildings in a grid-connected mode, and are commonly existing in northwest areas with sufficient solar energy resources, and the photovoltaic power generation square matrix is installed on the outer surface of a building enclosure structure (a roof or an outer wall) to provide power, so that the photovoltaic Building Integrated (BIPV) is formed, and the equipment performance of the whole set of building energy supply system is improved with lower manufacturing cost.

The traditional silicon battery can only convert 20% of solar energy into electric energy, and the rest of solar energy is dissipated in a heat form, so that the common phenomenon causes that the photoelectric conversion efficiency of all solar photovoltaic systems existing at present is about 20%, the traditional silicon battery has a larger lifting space, and how to improve the photoelectric conversion efficiency of a solar panel becomes a problem to be solved urgently in the photovoltaic industry of China. Experiments show that the operating temperature of the optimal point of the photovoltaic panel efficiency is 2 ℃ above and below 25 ℃, and the power of the photovoltaic module is reduced by 0.39% when the operating temperature of the photovoltaic module is increased by 1 ℃, namely, the higher the operating temperature of the photovoltaic module is, the lower the power generation efficiency is, the ageing of the module can be accelerated, so that the roof panel needs to be cooled, and the purpose of reducing the power generation efficiency reduction rate of the photovoltaic module is achieved. Because the solar photovoltaic system is widely used and the paving area of the photovoltaic panel is extremely large in the Chinese, even if the temperature of the photovoltaic module is only reduced by 1 ℃, the power conversion efficiency is improved by 0.39%, and extremely high economic benefit is brought. The cooling mode widely adopted in the current engineering is physical cooling, and the specific method is divided into the following three modes:

firstly, the mode of actively supplying air to the solar cell panel and spraying atomized water is adopted, and the method is the most widely applied at present, and has the advantages of simple operation, no need of additional design system, and realization of active physical cooling only by placing one or more spray fans in a solar cell panel laying site. However, the defects are obvious, firstly, the influence of the wind direction of the wind supply on the cooling effect of the photovoltaic panel is not considered, and when the wind supply quantity or the water quantity is too large, the power generation efficiency of the solar cell panel is even reduced, so that the whole photoelectric conversion efficiency of the photovoltaic system is not increased and reduced; secondly, the solar panel cooling effect is different for solar panels at different positions in the same air supply area due to the limitation of the air supply coverage area, so that the phenomena of uneven power generation effect and uneven cold and hot distribution of the solar panels are caused, and the solar panel cooling effect is disadvantageous for improving the efficiency of the whole photovoltaic system. Based on the two obvious defects, the mode of actively supplying air to the solar cell panel is not quite satisfactory for improving the power generation efficiency of the whole solar photovoltaic system.

Secondly, the air convection principle is adopted, namely, a cavity is designed between the roof solar cell panel and the heat insulation cotton (or the roof lining board), so that an air flow space is formed, the purpose of reducing the temperature of the roof solar cell panel is achieved, the method is provided for the solar photovoltaic Building Integrated (BIPV) technology, only the design stage is remained, the preliminary implementation is not yet achieved, the exposed defects of the method are obvious, namely, the problem that the temperature of the solar cell panel is too high cannot be effectively solved through the passive air flow, the air flow rate in the cavity is low and limited by the height of the cavity, the cooling effect is not obvious, if the air flow rate in the cavity is increased through a forced pressurization mode, the design difficulty is improved, the electric energy is consumed to a certain extent, the loss is avoided, the temperature of the solar photovoltaic module is still kept between 80 ℃ and 85 ℃ under the working condition that the air flow exists in the cavity according to the simulation result of a computer, and the actual cooling effect is not obvious.

Thirdly, a novel gel material, namely a mixture of carbon nano tubes and calcium chloride salt in the polymer, can absorb water vapor from air and condense the water vapor into liquid water for cooling. Whereby a 1 cm thick gel sheet can be pressed against the bottom of a standard silicon solar photovoltaic panel. During the day, this gel absorbs heat from the solar panel and releases water vapor. The evaporated water cools the solar panel just as sweat evaporated on the skin cools the human body. The method has the advantages that the cooling effect is obvious, and the power generation efficiency of the solar panel can be effectively improved. However, the method has the defects that the consumption of materials and the investment cost are obviously increased, according to researches, 0.5-1 kg of gel is needed for cooling each square meter of solar panel, the manufacturing cost of the gel is not low, the service life of the gel is short, the gel needs to be replaced periodically in the actual operation process, the method is not a reasonable solution for the existing and future extremely large solar panel laying area base number in China, the method realizes the cooling effect by releasing the heat in the panel, and the heat is not collected and utilized, so that the energy conservation and environmental protection in the real sense are realized.

Therefore, a high-quality, efficient and low-energy-consumption mode is needed to solve the problem of physical cooling of the photovoltaic panel.

Disclosure of Invention

The technical scheme adopted for solving the technical problems is as follows: a solar panel cooling system with heat recovery function, comprising: the solar cell panel, the capillary mat, the integrated high-temperature heat pump unit and the underground heat exchange well are arranged in the solar cell panel, the capillary mat is used for carrying out water circulation cooling on the solar cell panel, and the integrated high-temperature heat pump unit is used for carrying out heat exchange between high-temperature water in the capillary mat and low-temperature water in the underground heat exchange well; the back of the solar cell panel is connected with a capillary mat in a heat conduction way, the capillary mat is arranged in parallel with the back of the solar cell panel, a main water supply pipe and a main water return pipe are communicated with the capillary mat, the main water supply pipe is communicated with an integrated high-temperature heat pump unit through an uplink heat absorption pipeline, the main water return pipe is communicated with the integrated high-temperature heat pump unit through a downlink heat absorption pipeline, the integrated high-temperature heat pump unit is communicated with an underground heat exchange well through an uplink heat dissipation pipeline and a downlink heat dissipation pipeline, the capillary mat absorbs heat water through the uplink heat absorption pipeline and the downlink heat absorption pipeline and the integrated high-temperature heat pump unit, and the integrated high-temperature heat pump unit dissipates heat water through the uplink heat dissipation pipeline and the downlink heat dissipation pipeline and the underground heat exchange well; the underground heat exchange well is positioned in the depth of 50-150 meters underground, the uplink heat absorption pipeline, the downlink heat absorption pipeline, the uplink heat dissipation pipeline and the downlink heat dissipation pipeline are all made of heat insulation materials, the capillary mat and the underground heat exchange well are made of heat conduction materials, and when water in the underground heat exchange well circulates, heat exchange is carried out between the underground heat exchange well and underground soil outside the well so as to reduce the temperature of circulating water;

by utilizing the characteristic that the temperature of the underground normal-temperature soil is relatively stable, the soil with the temperature of 50-150 m in the underground is utilized to perform heat exchange with the integrated high-temperature heat pump unit, the water inlet temperature of a radiating pipeline in the integrated high-temperature heat pump unit is stabilized at the temperature of an underground constant-temperature layer, and then the circulated high-temperature water flow at the position of a solar panel is cooled by heat exchange and then recycled to the solar panel, so that the temperature at the position of the solar panel can be maintained at the optimal power generation temperature of about 25 ℃, and the problems of high efficiency and low energy consumption in physical cooling of the photovoltaic panel are solved.

Preferably, a groove-shaped heat conducting plate is arranged between the back surface of the solar cell panel and the capillary mat, the heat conducting plate is hollow, a heat conducting medium is arranged in the hollow part of the heat conducting plate, the notch surface of the heat conducting plate is buckled on the back surface and the side wall of the solar cell panel, the back surface of the groove of the heat conducting plate is attached to the capillary mat, the heat conducting plate is made of heat conducting materials, the hollow part of the heat conducting plate has a hollow thickness of 5-10 cm, and the heat conducting medium comprises air; the capillary mat is not completely attached to the solar panel, a certain distance is required to be kept between the capillary mat and the solar panel during arrangement, namely, an air interlayer of 5-10 cm is reserved, and the capillary mat is made of thermoplastic plastics such as PP-R, PE-RT, so that although the capillary mat has good high temperature resistance and corrosion resistance, the long-term working temperature of the capillary mat is not easy to exceed 70 ℃, otherwise, the service life of the capillary mat is seriously influenced, and for the metal roof board overlapped with the photovoltaic module, the surface temperature of the metal roof board can reach more than 80 ℃ when solar radiation is strong, therefore, the hollow heat conducting plate with a groove shape is arranged, and the solar panel can be wrapped and cooled by considering the service life of the capillary mat and combining the surface working temperature of the solar panel, and the influence of high temperature on the capillary mat can be avoided.

Preferably, a water supply thermometer is arranged at the position of the main water supply pipe, a water return thermometer is arranged at the position of the main water return pipe, and the water supply thermometer and the water return thermometer are connected to the integrated high-temperature heat pump unit; the water supply thermometer and the backwater thermometer have the functions of displaying water temperature and data remote transmission in real time, and can remotely transmit temperature information data to the integrated high-temperature heat pump unit, so that the water temperature is controlled, and the phenomenon of serious condensation caused by too low water temperature or the reduction of the cooling effect of the capillary mat when the water temperature is too high is prevented, so that the power generation efficiency of the solar cell panel is influenced.

Preferably, the system further comprises a heat storage water tank, wherein the heat storage water tank is communicated with the uplink heat absorption pipeline through an uplink heat storage pipeline, the heat storage water tank is communicated with the downlink heat absorption pipeline through a downlink heat storage pipeline, and heat storage valves are arranged on the uplink heat storage pipeline and the downlink heat storage pipeline; the heat storage water tank can be used for heat storage and heating in a heating season or daily hot water supply.

More preferably, the upstream heat absorption pipeline and the downstream heat absorption pipeline are respectively provided with a heat absorption valve, a heat absorption water gap valve is arranged at a heat absorption water gap of the integrated high-temperature heat pump unit, a heat dissipation water gap valve is arranged at a heat dissipation water gap of the integrated high-temperature heat pump unit, and the heat absorption water gap valve and the heat dissipation water gap valve are both electric control valves; for the whole system, because the whole heat storage mode is cross-season heat storage, the whole system is divided into two working conditions of winter and summer according to different use functions: for summer working conditions, the system aims to absorb heat, reduce the surface temperature of the backboard of the solar cell panel and improve the photoelectric conversion efficiency, so that the corresponding heat absorption valve, heat absorption water gap valve and heat dissipation water gap valve are opened and the heat storage valve is closed during operation; for the working condition in winter, the working temperature of the solar cell panel is not required to be reduced in a mode of providing cooling water because the outdoor environment temperature is lower, and at the moment, the system has the functions of taking heat and supplying the heat into a room, so that the use requirements for heating or living hot water are met, namely, the heat storage valve, the heat absorption water gap valve and the heat dissipation water gap valve are correspondingly opened, and the heat absorption valve is closed or is reduced.

Preferably, the capillary mat is in a planar honeycomb structure; the honeycomb structure can cool the solar cell panel more uniformly.

Preferably, the uplink heat absorption pipeline and the downlink heat absorption pipeline are communicated to the total water supply pipe and the total water return pipe after penetrating through the inside of the bracket of the solar panel.

The beneficial effects of the utility model are as follows:

according to the utility model, the solar cell panel is circularly cooled by utilizing the characteristic that the temperature of the underground normal-temperature soil is relatively stable, so that the problem of efficiency reduction caused by overhigh working temperature in the photoelectric conversion process of the solar cell panel is solved, meanwhile, the building is heated or domestic hot water is provided in winter, the power generation efficiency of the solar cell panel is improved, and the effective recovery of waste heat and the efficient utilization of energy are realized.

Drawings

FIG. 1 is a side view of a portion of a solar panel cooling system having a heat recovery function;

FIG. 2 is a rear view of a solar panel section;

fig. 3 is a schematic diagram of a system.

In the figure: 1. a solar cell panel; 2. a capillary mat; 3. an integrated high-temperature heat pump unit; 4. an underground heat exchange well; 5. a main water supply pipe; 6. a main return pipe; 7. an upstream heat absorption pipeline; 8. a downstream heat absorption pipeline; 9. an uplink heat dissipation pipeline; 10. a downstream heat dissipation pipeline; 11. a heat conductive plate; 12. a water supply thermometer; 13. a backwater thermometer; 14. a thermal storage tank; 15. an upstream heat storage pipeline; 16. a downstream heat storage pipeline; 17. a heat storage valve; 18. a heat absorption valve; 19. a heat absorbing water gap valve; 20. a heat dissipation water gap valve; 21. and (3) a bracket.

Detailed Description

The following description of the related art will be made apparent to, and is not intended to limit the scope of, the embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 3, a solar panel cooling system with a heat recovery function includes: the solar heat pump system comprises a solar panel 1, a capillary mat 2, an integrated high-temperature heat pump unit 3 and an underground heat exchange well 4, wherein the capillary mat 2 is used for carrying out water circulation cooling on the solar panel 1, and the integrated high-temperature heat pump unit 3 is used for carrying out heat exchange between high-temperature water in the capillary mat 2 and low-temperature water in the underground heat exchange well 4; the back of the solar cell panel 1 is connected with the capillary mat 2 in a heat conduction way, the capillary mat 2 is arranged in parallel with the back of the solar cell panel 1, a main water supply pipe 5 and a main water return pipe 6 are communicated with the capillary mat 2, the main water supply pipe 5 is communicated with the integrated high-temperature heat pump unit 3 through an uplink heat absorption pipeline 7, the main water return pipe 6 is communicated with the integrated high-temperature heat pump unit 3 through a downlink heat absorption pipeline 8, the integrated high-temperature heat pump unit 3 is communicated with the underground heat exchange well 4 through an uplink heat dissipation pipeline 9 and a downlink heat dissipation pipeline 10, and the capillary mat 2 is in heat absorption water circulation with the integrated high-temperature heat pump unit 3 through the uplink heat dissipation pipeline 7 and the downlink heat dissipation pipeline 8; the underground heat exchange well 4 is positioned in the depth of 50-150 meters underground, the uplink heat absorption pipeline 7, the downlink heat absorption pipeline 8, the uplink heat dissipation pipeline 9 and the downlink heat dissipation pipeline 10 are all made of heat insulation materials, the capillary mat 2 and the underground heat exchange well 4 are made of heat conduction materials, and when water in the underground heat exchange well 4 circulates, heat exchange is carried out between the underground heat exchange well and underground soil outside the well so as to reduce the temperature of circulating water;

by utilizing the characteristic that the temperature of the underground normal-temperature soil is relatively stable, the soil with the temperature of 50-150 m under the ground being stable at about 15 ℃ is utilized to perform heat exchange with the integrated high-temperature heat pump unit 3, the water inlet temperature of a heat dissipation pipeline in the integrated high-temperature heat pump unit 3 is stabilized at the temperature of an underground constant-temperature layer, and then the circulated high-temperature water flow at the position of the solar panel 1 is cooled by heat exchange and then recycled to the solar panel 1, so that the temperature at the position of the solar panel 1 can be maintained at about 25 ℃ at the optimal power generation temperature, and the problem of physical cooling of the photovoltaic panel is solved with high efficiency and low energy consumption.

Furthermore, a groove-shaped heat conducting plate 11 is arranged between the back surface of the solar cell panel 1 and the capillary mat 2, the heat conducting plate 11 is hollow, a heat conducting medium is arranged in the hollow part, the notch surface of the heat conducting plate 11 is buckled on the back surface and the side wall of the solar cell panel 1, the capillary mat 2 is attached to the back surface of the groove of the heat conducting plate 11, the heat conducting plate 11 is made of heat conducting materials, the hollow part of the heat conducting plate 11 is 5-10 cm thick, and the heat conducting medium comprises air; the capillary mat 2 is not completely attached to the solar panel 1, a certain distance is required to be kept between the capillary mat 2 and the solar panel 1 when the capillary mat is arranged, namely, an air interlayer of 5-10 cm is reserved, and the capillary mat 2 is made of thermoplastic plastics such as PP-R, PE-RT, so that although the capillary mat 2 is good in high temperature resistance and corrosion resistance, the long-term working temperature of the capillary mat 2 is not easy to exceed 70 ℃, otherwise the service life of the capillary mat is seriously influenced, and for the metal roof board overlapped with the photovoltaic module, the surface temperature of the metal roof board can reach more than 80 ℃ when solar radiation is strong, so that the service life of the capillary mat 2 is considered and the surface working temperature of the solar panel 1 is combined, the hollow heat conducting plate 11 with a groove shape is arranged, so that the solar panel 1 can be wrapped and cooled, and the influence of high temperature on the capillary mat 2 can be avoided.

Further, a water supply thermometer 12 is arranged at the position of the total water supply pipe 5, a water return thermometer 13 is arranged at the position of the total water return pipe 6, and the water supply thermometer 12 and the water return thermometer 13 are connected to the integrated high-temperature heat pump unit 3 in a data mode; the water supply thermometer 12 and the backwater thermometer 13 have the functions of displaying water temperature and data remote transmission in real time, and can remotely transmit temperature information data to the integrated high-temperature heat pump unit 3, so that the water temperature is controlled, and the phenomenon of serious condensation caused by too low water temperature or the weakening of the cooling effect of the capillary mat 2 when the water temperature is too high is prevented, so that the power generation efficiency of the solar cell panel 1 is influenced.

Further, the system also comprises a heat storage water tank 14, wherein the heat storage water tank 14 is communicated with the uplink heat absorption pipeline 7 through an uplink heat storage pipeline 15, the heat storage water tank 14 is communicated with the downlink heat absorption pipeline 8 through a downlink heat storage pipeline 16, and heat storage valves 17 are arranged on the uplink heat storage pipeline 15 and the downlink heat storage pipeline 16; the heat storage tank 14 can be used for heat storage and for heating in a heating season or for the supply of domestic hot water on a daily basis.

Furthermore, the heat absorption valves 18 are arranged on the uplink heat absorption pipeline 7 and the downlink heat absorption pipeline 8, a heat absorption water gap valve 19 is arranged at the heat absorption water gap of the integrated high-temperature heat pump unit 3, a heat dissipation water gap valve 20 is arranged at the heat dissipation water gap of the integrated high-temperature heat pump unit 3, and the heat absorption water gap valve 19 and the heat dissipation water gap valve 20 are all electric control valves; for the whole system, because the whole heat storage mode is cross-season heat storage, the whole system is divided into two working conditions of winter and summer according to different use functions: for summer working conditions, the system aims to absorb heat, reduce the surface temperature of the backboard of the solar panel 1 and improve the photoelectric conversion efficiency, so that the corresponding heat absorption valve 18, the heat absorption water gap valve 19 and the heat dissipation water gap valve 20 are opened and the heat accumulation valve 17 is closed during operation; for the working condition in winter, the outdoor environment temperature is lower, so that the working temperature of the solar panel 1 does not need to be reduced in a way of providing cooling water, at the moment, the system has the functions of taking heat and supplying the heat into a room, and the use requirements for heating or living hot water are met, namely, the heat storage valve 17, the heat absorption water gap valve 19 and the heat dissipation water gap valve 20 are correspondingly opened, and the heat absorption valve 18 is closed or reduced.

Further, the capillary mat 2 is in a plane honeycomb structure; the honeycomb structure can cool the solar cell panel 1 more uniformly.

Further, the upstream heat absorption pipeline 7 and the downstream heat absorption pipeline 8 are communicated to the total water supply pipe 5 and the total water return pipe 6 after penetrating through the inside of the bracket 21 of the solar panel 1.

Examples

The technical scheme adopted by the embodiment is divided into a heat collecting end, a heat dissipating end and a heat accumulating end, wherein:

heat collecting end: the solar cell panel 1 is arranged on a bracket 21 and fixed, and a total water supply pipe 5 and a total water return pipe 6 are embedded into the bracket 21 of the frame of the solar cell panel 1 and used for providing cooling water with acceptable temperature fluctuation range of 18-20 ℃ for a capillary mat 2 arranged on the back of the cell panel, and the total water supply pipe 5 and the total water return pipe 6 are connected with the integrated high-temperature heat pump unit 3. The capillary mat 2 is not directly and completely attached to the back surface of the solar cell panel 1, and a certain distance is required to be kept between the capillary mat 2 and the solar cell panel 1 when the capillary mat is arranged, namely, an air interlayer of 5-10 cm is reserved, so that a groove-type heat conducting plate 11 is adopted, the heat conducting plate 11 is hollow, heat conducting medium air is arranged in the hollow part, the notch surface of the heat conducting plate 11 is buckled on the back surface and the side wall of the solar cell panel 1, the capillary mat 2 is attached to the back surface of the groove of the heat conducting plate 11, the heat conducting plate 11 is made of heat conducting materials, and the hollow part of the heat conducting plate 11 is 5-10 cm thick. The reason is that the manufacturing raw materials of the common capillary radiation air conditioner are thermoplastic plastics such as PP-R, PE-RT, and the materials have good high temperature resistance and corrosion resistance, but the long-term working temperature of the materials cannot exceed 70 ℃, otherwise the service life of the materials is seriously influenced, and for the metal roof board overlapped with the photovoltaic module, the surface temperature of the metal roof board can reach more than 80 ℃ when the solar radiation is strong, so that the distance between the metal roof board and the solar panel needs to be controlled in consideration of the service life of the capillary mat 2 and the surface working temperature of the solar panel 1. In addition, be provided with water supply thermometer 12, return water thermometer 13 respectively at total delivery pipe 5, total return water pipe 6's exit end, this thermometer has the function that shows water temperature and data teletransmission in real time, can teletransmission temperature information data to integral type high temperature pump unit 3 to control the opening and closing and the size of heat absorption mouth of a river valve 19, heat dissipation mouth of a river valve 20, and then control the temperature of capillary mat 2 department, thereby prevent to cause the dew phenomenon serious or the cooling effect of capillary mat 2 weakens when the temperature is too high because of the temperature is too low thereby influence solar cell panel 1's generating efficiency.

The capillary mat 2 absorbs heat emitted by the solar cell panel 1 in the photoelectric conversion process and solar radiation heat absorbed by the solar cell panel 1 by the action of radiation and convection, the working temperature of the solar cell panel 1 is reduced, the temperature of the solar cell panel is ensured to be lower than 70 ℃, and the whole working temperature of the solar cell panel 1 is uniformly distributed and maintained in a lower temperature range under the action of cold radiation of the capillary mat 2, so that the photoelectric conversion efficiency of the solar cell panel is ensured. After absorbing the heat of the solar panel 1, the cooling water is circulated back to the integrated high-temperature heat pump unit 3 as high-temperature backwater, and is supplied again after completing heat exchange and cooling, so that a complete working cycle is formed.

Radiating end: the underground heat exchange well 4 utilizes underground soil (dry soil/wet soil) with high heat exchange capacity, takes the soil as a heat dissipation end, takes water as a heat transfer medium, releases the heat collected by the heat collection end in the soil, further reduces the temperature of circulating water at the heat dissipation end, and can continuously exchange heat with the heat collection end through the integrated high-temperature heat pump unit 3 after circulation.

Heat storage end: a heat storage water tank 14 is arranged in the installation building of the solar cell panel 1, the heat storage water tank 14 is communicated with the uplink heat absorption pipeline 7 through an uplink heat storage pipeline 15, the heat storage water tank 14 is communicated with the downlink heat absorption pipeline 8 through a downlink heat storage pipeline 16, and heat storage valves 17 are arranged on the uplink heat storage pipeline 15 and the downlink heat storage pipeline 16; the heat storage water tank 14 can be used for heat storage and heating in a heating season or for the supply of domestic hot water in daily life, thereby achieving effective recovery of waste heat and efficient utilization of energy.

For the whole system, because the whole heat dissipation and storage form is cross-season heat storage, the whole system is divided into two working conditions of winter and summer according to different use functions: for summer working conditions, the system aims to absorb heat, reduce the surface temperature of the backboard of the solar panel 1 and improve the photoelectric conversion efficiency, so that the corresponding heat absorption valve 18, the heat absorption water gap valve 19 and the heat dissipation water gap valve 20 are opened and the heat accumulation valve 17 is closed during operation; for winter working conditions, the outdoor environment temperature is lower, so that the working temperature of the solar panel 1 does not need to be reduced in a way of providing cooling water, at the moment, the system has the functions of taking the heat of the underground heat exchange well 4 in soil and supplying the heat into a room, or taking the heat released by power generation of the solar panel 1 to supply the heat into the room, so that the use requirements of heating or living hot water are met, namely, the heat storage valve 17, the heat absorption water gap valve 19 and the heat dissipation water gap valve 20 are correspondingly opened, and the heat absorption valve 18 is closed or is reduced.

The water supply temperature of the cooling water at 18-20 ℃ in the embodiment is only one design working condition scheme, wherein the 18-20 ℃ is determined according to outdoor design weather parameters in summer and the highest water outlet temperature achieved by the existing integrated high-temperature heat pump unit 3, different design water outlet temperatures can be adopted along with development of high-temperature heat pump technology and different use areas, the water supply temperature can be combined with an automatic control technology, and the water supply temperature can be regulated and controlled in real time by monitoring outdoor real-time weather parameters and power generation efficiency of a solar panel.

According to the embodiment, the capillary mat 2, the solar panel 1 and the integrated high-temperature heat pump unit 3 are combined to form the solar panel cooling system with the heat recovery function, the capillary mat 2 is used as a heat collecting end, soil is used as a heat dissipating end, and the integrated high-temperature heat pump unit 3 is used for realizing cooling and efficiency improvement of the solar panel 1 and simultaneously recycling and utilizing waste heat of the solar panel 1, and heating and domestic hot water supply of a building in winter are realized.

The present embodiment adopts a mode of embedding the total water supply pipe 5 and the total water return pipe 6 in the bracket 21 of the solar panel 1, and is connected with the integrated high-temperature heat pump unit 3 to form a complete circulation path, and uses cooling water with an acceptable range of 18-20 ℃ as a heat transfer medium to absorb a large amount of heat generated in the photoelectric conversion process of the solar panel 1 and heat generated by absorbing solar radiation by itself in a radiation and convection mode, so that the working efficiency of the solar panel 1 is improved, and meanwhile, faults caused by overhigh temperature of the solar panel 1 can be prevented.

In summary, the utility model provides a solar panel cooling system with a heat recovery function, which is used for circularly cooling a solar panel by utilizing the characteristic that the temperature of underground normal-temperature soil is relatively stable, so that the problem of efficiency reduction caused by overhigh working temperature in the photoelectric conversion process of the solar panel is solved, a building is heated or domestic hot water is provided in winter, the power generation efficiency of the solar panel is improved, and meanwhile, the effective recovery of waste heat and the efficient utilization of energy are realized, so that the utility model has wide application prospects.

It is emphasized that: the above embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A solar panel cooling system with heat recovery function, comprising: the solar heat pump system comprises a solar cell panel (1), a capillary mat (2), an integrated high-temperature heat pump unit (3) and an underground heat exchange well (4), wherein the capillary mat (2) is used for carrying out water circulation cooling on the solar cell panel (1), and the integrated high-temperature heat pump unit (3) is used for carrying out heat exchange on high-temperature water in the capillary mat (2) and low-temperature water in the underground heat exchange well (4);

the back of the solar cell panel (1) is in heat conduction connection with the capillary mat (2), the capillary mat (2) is arranged in parallel with the back of the solar cell panel (1), a main water supply pipe (5) and a main water return pipe (6) are communicated with the capillary mat (2), the main water supply pipe (5) is communicated to the integrated high-temperature heat pump unit (3) through an uplink heat absorption pipeline (7), the main water return pipe (6) is communicated to the integrated high-temperature heat pump unit (3) through a downlink heat absorption pipeline (8), the integrated high-temperature heat pump unit (3) is communicated to an underground heat exchange well (4) through an uplink heat absorption pipeline (9) and a downlink heat absorption pipeline (10), the capillary mat (2) is in heat absorption water circulation with the integrated high-temperature heat pump unit (3) through the uplink heat absorption pipeline (7) and the downlink heat absorption pipeline (8), and the integrated high-temperature heat pump unit (3) is in heat exchange with the underground heat exchange well (4) through the uplink heat absorption pipeline (9) and the downlink heat absorption pipeline (10), and the integrated high-temperature heat pump unit (3) is in heat exchange with the underground heat exchange well (4) and is located at a depth of 150;

the heat-insulating underground water circulating system is characterized in that the uplink heat-absorbing pipeline (7), the downlink heat-absorbing pipeline (8), the uplink heat-dissipating pipeline (9) and the downlink heat-dissipating pipeline (10) are all made of heat-insulating materials, the capillary mat (2) and the underground heat exchange well (4) are made of heat-conducting materials, and heat exchange is carried out between the underground heat exchange well (4) and underground soil outside the well when water circulates so as to reduce the temperature of circulating water.

2. The solar cell panel cooling system with the heat recovery function according to claim 1, wherein a groove-shaped heat conducting plate (11) is arranged between the back surface of the solar cell panel (1) and the capillary mat (2), the heat conducting plate (11) is hollow, a heat conducting medium is arranged in a hollow part of the heat conducting plate, the notch surface of the heat conducting plate (11) is buckled on the back surface and the side wall of the solar cell panel (1), the back surface of the groove of the heat conducting plate (11) is attached to the capillary mat (2), the heat conducting plate (11) is made of a heat conducting material, the thickness of the hollow part of the heat conducting plate (11) is 5-10 cm, and the heat conducting medium comprises air.

3. The solar panel cooling system with the heat recovery function according to claim 1, wherein a water supply thermometer (12) is arranged at the position of the total water supply pipe (5), a water return thermometer (13) is arranged at the position of the total water return pipe (6), and the water supply thermometer (12) and the water return thermometer (13) are connected to the integrated high-temperature heat pump unit (3) in a data mode.

4. The solar panel cooling system with the heat recovery function according to claim 1, further comprising a heat storage water tank (14), wherein the heat storage water tank (14) is communicated with an uplink heat absorption pipeline (7) through an uplink heat storage pipeline (15), the heat storage water tank (14) is communicated with a downlink heat absorption pipeline (8) through a downlink heat storage pipeline (16), and heat storage valves (17) are arranged on the uplink heat storage pipeline (15) and the downlink heat storage pipeline (16).

5. The solar panel cooling system with the heat recovery function according to claim 4, wherein heat absorption valves (18) are arranged on the uplink heat absorption pipeline (7) and the downlink heat absorption pipeline (8), a heat absorption water gap valve (19) is arranged at a heat absorption water gap of the integrated high-temperature heat pump unit (3), a heat dissipation water gap valve (20) is arranged at a heat dissipation water gap of the integrated high-temperature heat pump unit (3), and the heat absorption water gap valve (19) and the heat dissipation water gap valve (20) are all electric control valves.

6. The solar panel cooling system with heat recovery function according to claim 1, wherein the capillary mat (2) is in a planar honeycomb structure.

7. The solar panel cooling system with the heat recovery function according to claim 1, wherein the uplink heat absorption pipeline (7) and the downlink heat absorption pipeline (8) are communicated to the total water supply pipe (5) and the total water return pipe (6) after passing through the bracket (21) of the solar panel (1).