CN209676196U - A kind of photovoltaic and photothermal solar integral system using capillary recycling waste heat - Google Patents

Abstract

The invention relates to a solar photovoltaic photothermal integrated system which utilizes capillary tubes to recover waste heat, and relates to a solar photovoltaic photothermal integrated system. The utility model aims to solve the technical problem that the temperature of the existing solar photovoltaic panel seriously restricts its own photoelectric conversion efficiency, and the heat generated by the solar photovoltaic panel is wasted. The utility model uses the capillary network as a heat exchanger to cool down the solar photovoltaic panel. In addition, water has a large specific heat. Compared with air, water as a cooling medium greatly improves the heat transfer efficiency. In the process of using heat, the utility model, on the one hand, exchanges heat with the urban water supply system to prepare domestic hot water, which reduces building energy consumption; on the other hand, heats the roots of plants to promote the growth and development of plants, and is applied to urban beautification. The performance of the system of the utility model is better, and after the unit area of the photovoltaic panel is cooled, the power generation efficiency of the photovoltaic panel is increased by more than 10%.

Description

A solar photovoltaic photothermal integrated system using capillary tubes to recover waste heat

technical field

The utility model relates to a solar photovoltaic photothermal integrated system.

Background technique

Due to the increasingly serious problem of fossil energy crisis and environmental pollution, the development and utilization of renewable energy has gradually become a research hotspot. 99.98% of the available energy on the earth comes from solar energy. Solar photovoltaic cells are increasingly favored by people at home and abroad due to their unlimited storage of input light energy. However, during its application, the power generation efficiency of solar cells will decrease as the surface temperature of the cells increases, so some experts propose to recover this part of the heat that raises the temperature of the photovoltaic panels. Theoretical studies have shown that the maximum theoretical conversion efficiency of monocrystalline silicon solar cells is only about 30% at 0°C, and the temperature of photovoltaic cells seriously restricts their own photoelectric conversion efficiency. Under the condition of a certain light intensity, when the temperature of the silicon cell itself increases, its output power will decrease. Studies have shown that the photoelectric conversion efficiency will decrease by 0.5% for every 1°C increase in the temperature of the photovoltaic cell module. In practical applications, under standard conditions, the conversion efficiency of silicon cells is about 12% to 17%, and more than 83% of the solar energy irradiated on the surface of the cell cannot be converted into useful energy, and a considerable part of the energy is converted into heat energy, making the temperature of the cell increase, leading to a decrease in battery efficiency.

In order to keep the battery efficiency as high as possible, fluid channels can be laid on the back of the battery to remove heat and reduce the battery temperature. Early studies generally used air-cooled panels to cool solar cells, but the specific heat of air is small, the heat absorption efficiency is low, and the heat collected by the air working fluid is scattered and difficult to use. If it is directly discharged into the environment, part of the heat energy will be wasted. Therefore, some countries have strengthened the research on cooling methods and waste heat utilization, using water as the cooling medium for heat transfer, but the selection of heat exchange devices is often accompanied by an increase in cost, the heat exchange and cooling effects are very limited, and the system performance is affected by the outside world. The environment has a great impact, which to a certain extent has affected the development and promotion of integrated technology.

In recent years, green roofs have become a new option to improve the urban ecological environment. Roof planting can not only improve the urban environment, improve the quality of citizens' living and working environment, but also heat insulation, reduce indoor cooling load, save energy, protect the top of the building, and prolong the service life of roof building materials. Roof greening is beautiful and tidy, energy-saving and emission-reducing, and is more and more popular among people. The root temperature of plants can directly affect the growth of plants, and the suitable growth temperature of plant roots is generally 20°C to 30°C. Low root temperature reduces water absorption, reduces the mineral absorption rate of the root, and reduces the content of endogenous auxin; too high soil temperature is prone to premature senescence of the root system, which eventually leads to premature senescence of the plant. It can be seen that it is of great significance to maintain the root temperature of roof plants in a reasonable range.

Utility model content

The utility model is to solve the technical problem that the temperature of the existing solar photovoltaic panels seriously restricts its own photoelectric conversion efficiency, and the heat generated by the solar photovoltaic panels is wasted, and provides a solar photovoltaic photothermal integration using capillary tubes to recover waste heat system.

The solar photovoltaic photothermal integrated system utilizing capillary tubes to recover waste heat of the present utility model is composed of solar photovoltaic panel 1, first capillary network 2, second capillary network 3, heat exchange tank 4, first water level sensor 5, controller 6, The first water pump 8, the electric heater 9, the heating water tank 11, the temperature pressure safety valve 12, the third capillary network 14, the second water pump 15, the second water level sensor 16 and the temperature sensor 17;

The first capillary network 2 is fixed on the outer wall of the solar photovoltaic panel 1, the water outlet of the first capillary network 2 is connected with the water inlet of the second capillary network 3, and the water outlet of the second capillary network 3 is connected with the third capillary network 14 The water inlet of the third capillary network 14 is connected with the water inlet of the first capillary network 2, and the second water pump is arranged on the pipeline between the water outlet of the third capillary network 14 and the water inlet of the first capillary network 2 15;

The second capillary network 3 is arranged in the heat exchange tank 4, the tap water inlet pipe 7 is arranged on the heat exchange tank 4, the first water level sensor 5 is arranged in the heat exchange tank 4, the signal output terminal of the first water level sensor 5 is connected with the controller 6 The signal input terminal is connected, the water outlet of the heat exchange tank 4 is connected with the water inlet of the heating water tank 11, and the first water pump 8 is arranged on the pipeline between the water outlet of the heat exchange tank 4 and the water inlet of the heating water tank 11, and the heating water tank 11 Electric heater 9, temperature sensor 17 and the second water level sensor 16 are set, and the signal output ends of electric heater 9, temperature sensor 17 and the second water level sensor 16 are connected with the signal input end of controller 6 respectively, on the heating water tank 11 The temperature and pressure safety valve 12 and the water outlet pipe 10 are set; the third capillary network 14 is buried in the soil 13 of the vegetation.

The utility model designs a set of solar photovoltaic photothermal integrated system using capillary tube recycling waste heat technology. The system is divided into two parts: a heat absorption system and a heat release system. The heat absorption system is mainly composed of a solar photovoltaic panel 1 and a second capillary network 3 for cooling it. The surface temperature of the solar photovoltaic panel 1 continues to rise due to long-term exposure to the sun, and the flowing water energy in the second capillary network 3 continuously takes away the heat of the solar photovoltaic panel 1, reducing the surface temperature of the solar photovoltaic panel 1 to maintain its Relatively high power generation efficiency.

The heat release system is further divided into primary heat release and secondary heat release: the primary heat release refers to heat exchange between the heat absorbed from the solar photovoltaic panel 1 and the urban upper water in the heat exchange tank 4 to prepare domestic hot water (urban upper water). Water enters the heat exchange tank 4 through the tap water inlet pipe 7, and the domestic hot water is drawn from the heating water tank 11 through the water outlet pipe 10). The heater 9 heats to meet the needs of users; the second heat release refers to flowing the cooling water with residual temperature after the first heat release through the soil 13 of the vegetation, and regulates the root of the plant to reach a stable temperature to promote the growth and development of the plant. Because capillary tubes are small in size, light in weight, low in cost, and high in heat exchange efficiency, capillary tubes are used as heat exchangers in both heat absorption and heat release systems. The entire system is powered by a water pump.

In the utility model, in the heat exchange tank 4 and the heating water tank 11, the water temperature and water level are intelligently controlled by the controller 6, so as to realize the automatic regulation and management of construction equipment and save manpower and material resources.

The utility model still uses the capillary network as the heat release device in the secondary heat release system, because the fertile soil full of vegetation transmits heat slowly and less, and the deeper the soil layer, the less the soil temperature is affected by the external temperature. The capillary here is buried under the vegetation and the soil layer, so the heat release process has little influence with the change of the ambient temperature, can fully release heat, and effectively maintains the stable cycle operation of the system. According to the location of the solar photovoltaic panel 1, the utility model selects the location of the vegetation nearby, which can be the vegetation on the roof or the vegetation on the ground. After the secondary heat release, the cooling water returns to the first capillary network 2 to cool down the solar photovoltaic panel 1 through the second water pump 15 , so as to circulate again.

Advantage of the utility model:

1) This utility model uses clean energy solar energy as the main energy source to be used in buildings. Part of it directly uses the sunlight irradiated on the photovoltaic panel to generate photovoltaic power; consumption;

2) The utility model adopts a capillary network with small volume, light weight, low cost and high heat exchange efficiency as the heat exchange device in both the heat absorption and heat release systems, and at the same time uses water with a large specific heat as the heat transfer medium, which greatly improves the Enhance the heat transfer effect and ensure the photoelectric conversion efficiency of solar energy;

3) In the utility model, the cooling water heated by the photovoltaic panels assists the growth of plants after exchanging heat with domestic water, so as to realize multi-stage utilization of waste heat.

Experimental research shows that the performance of the solar photovoltaic photothermal integrated system using capillary tubes to recover waste heat is better. After cooling the unit area of photovoltaic panels, the power generation efficiency of photovoltaic panels is increased by more than 10%, and the power saving of the primary heat release system is 263.90W, the power saving of the secondary heat release system is 121.48W, and the energy saving effect is good.

Compared with previous research results, this system reduces the temperature of photovoltaic panels and solves the problem of low power generation efficiency of solar photovoltaic panels in high-temperature environments under direct sunlight; it sets up primary and secondary heat release systems to solve the problem of The waste heat is difficult to collect and utilize; the capillary network is used as the heat exchange device of the heat absorption and heat release system, which alleviates the problem that the heat exchange and cooling effect of the previous system is often accompanied by an increase in cost when the heat exchange device is selected. The heating water tank 11 is set to keep the hot water temperature constant, and the capillary filter is set under a certain thickness of soil layer, which alleviates the problem that the system performance is greatly affected by the external environment, greatly optimizes the system scheme, and proves through experiments that it has a certain economical effect. availability and feasibility.

At present, my country's solar power generation industry is growing rapidly, and diversified solar power generation markets such as large-scale photovoltaic power stations, photothermal power stations, distributed photovoltaic power generation and off-grid photovoltaic systems have been launched. The solar photovoltaic photothermal integrated system that uses capillary tubes to recycle waste heat firstly provides guarantee for the efficient operation of the vast domestic solar power generation market, and secondly uses waste heat to provide daily necessities.

With the deepening of research, in the future photovoltaic-thermal integrated system, the heat absorption and heat release system (device) will be effectively combined with the automatic control device, so that the structural design will gradually become perfect, and it may enter tens of millions of houses. , Public buildings, energy saving and emission reduction, benefiting the whole people.

The utility model uses the capillary network as a heat exchanger to cool down the solar photovoltaic panel. Because the capillary is small in size, light in weight, low in cost, and its small diameter increases the heat transfer area, it has good economic benefits. In addition, water has a large specific heat, and compared with air, water as a cooling medium greatly improves heat transfer efficiency. Based on the application of cold radiation capillary, the utility model designs a photovoltaic photothermal integrated system, which has a unique structure, convenient installation, and relatively simple operation adjustment. In the process of using heat, on the one hand, it exchanges heat with the urban water supply system to prepare domestic hot water, which reduces building energy consumption; on the other hand, it heats the roots of plants to promote the growth and development of plants, and is used in urban beautification. In summary, the solar photovoltaic photothermal integrated system using capillary tubes to recover waste heat from photovoltaic panels in this utility model has relatively broad application prospects in my country, which can promote the popularization and improvement of large-scale solar power generation, further reduce building energy consumption, and realize energy saving emission reduction.

The utility model starts from selecting a capillary network with good heat transfer performance as a heat exchange device, and designs an integrated system for solar power generation and hot water preparation at the same time, which can not only reduce the temperature of photovoltaic cell components, but also improve the photoelectric conversion efficiency of photovoltaic cells. It can provide thermal energy to the outside, thereby obtaining double benefits, and greatly improving the overall performance efficiency of solar energy.

Description of drawings

Fig. 1 is a schematic diagram of a solar photovoltaic photothermal integrated system using capillary tubes to recover waste heat according to Embodiment 1.

Detailed ways

Specific Embodiment 1: This embodiment is a solar photovoltaic photothermal integrated system that uses capillary tubes to recover waste heat. Exchange water tank 4, first water level sensor 5, controller 6, first water pump 8, electric heater 9, heating water tank 11, temperature and pressure safety valve 12, third capillary network 14, second water pump 15, second water level sensor 16 and temperature sensor 17 form;

The first capillary network 2 is fixed on the outer wall of the solar photovoltaic panel 1, the water outlet of the first capillary network 2 is connected with the water inlet of the second capillary network 3, and the water outlet of the second capillary network 3 is connected with the third capillary network 14 The water inlet of the third capillary network 14 is connected with the water inlet of the first capillary network 2, and the second water pump is arranged on the pipeline between the water outlet of the third capillary network 14 and the water inlet of the first capillary network 2 15;

The second capillary network 3 is arranged in the heat exchange tank 4, the tap water inlet pipe 7 is arranged on the heat exchange tank 4, the first water level sensor 5 is arranged in the heat exchange tank 4, the signal output terminal of the first water level sensor 5 is connected with the controller 6 The signal input terminal is connected, the water outlet of the heat exchange tank 4 is connected with the water inlet of the heating water tank 11, and the first water pump 8 is arranged on the pipeline between the water outlet of the heat exchange tank 4 and the water inlet of the heating water tank 11, and the heating water tank 11 Electric heater 9, temperature sensor 17 and the second water level sensor 16 are set, and the signal output ends of electric heater 9, temperature sensor 17 and the second water level sensor 16 are connected with the signal input end of controller 6 respectively, on the heating water tank 11 The temperature and pressure safety valve 12 and the water outlet pipe 10 are set; the third capillary network 14 is buried in the soil 13 of the vegetation.

In this implementation mode, a set of solar photovoltaic photothermal integrated system using capillary tube recycling waste heat technology is designed. The system is divided into two parts: the heat absorption system and the heat release system. The heat absorption system is mainly composed of a solar photovoltaic panel 1 and a second capillary network 3 for cooling it. The surface temperature of the solar photovoltaic panel 1 continues to rise due to long-term exposure to the sun, and the flowing water energy in the second capillary network 3 continuously takes away the heat of the solar photovoltaic panel 1, reducing the surface temperature of the solar photovoltaic panel 1 to maintain its Relatively high power generation efficiency.

The heat release system is further divided into primary heat release and secondary heat release: the primary heat release refers to heat exchange between the heat absorbed from the solar photovoltaic panel 1 and the urban upper water in the heat exchange tank 4 to prepare domestic hot water (urban upper water). Water enters the heat exchange tank 4 through the tap water inlet pipe 7, and the domestic hot water is drawn from the heating water tank 11 through the water outlet pipe 10). The heater 9 heats to meet the needs of users; the second heat release refers to flowing the cooling water with residual temperature after the first heat release through the soil 13 of the vegetation, and regulates the root of the plant to reach a stable temperature to promote the growth and development of the plant. Because capillary tubes are small in size, light in weight, low in cost, and high in heat exchange efficiency, capillary tubes are used as heat exchangers in both heat absorption and heat release systems. The entire system is powered by a water pump.

In this embodiment, in the heat exchange tank 4 and the heating water tank 11, the water temperature and water level are all intelligently controlled by the controller 6, so as to realize automatic regulation and management of construction equipment and save manpower and material resources.

In this embodiment, the capillary network is still used as the heat release device in the secondary heat release system. Since the fertile soil full of vegetation transmits heat slowly and less, and the deeper the soil layer, the less affected the soil temperature is by the external temperature. The capillary here is buried under the vegetation and the soil layer, so the heat release process has little influence with the change of the ambient temperature, can fully release heat, and effectively maintains the stable cycle operation of the system. In this embodiment, according to the location of the solar photovoltaic panel 1, the nearest vegetation location is selected, which may be the vegetation on the roof or the vegetation on the ground. After the secondary heat release, the cooling water returns to the first capillary network 2 to cool down the solar photovoltaic panel 1 through the second water pump 15 , so as to circulate again.

The advantage of this implementation mode:

1) In this implementation mode, clean energy solar energy is used as the main energy source in buildings, and a part directly utilizes sunlight irradiated on photovoltaic panels for photovoltaic power generation; consumption;

2) In this embodiment, the capillary network with small volume, light weight, low cost and high heat exchange efficiency is used as the heat exchange device in both the heat absorption and heat release systems, and water with a large specific heat is used as the heat transfer medium at the same time, which greatly improves Enhance the heat transfer effect and ensure the photoelectric conversion efficiency of solar energy;

3) In this embodiment, the cooling water heated by the photovoltaic panels assists the growth of plants after exchanging heat with domestic water, so as to realize multi-stage utilization of waste heat.

Experimental research shows that the performance of the solar photovoltaic photothermal integrated system using capillary tubes to recover waste heat in this embodiment is better. After cooling a unit area of photovoltaic panels, the power generation efficiency of photovoltaic panels increases by more than 10%.

Compared with previous research results, this system reduces the temperature of photovoltaic panels and solves the problem of low power generation efficiency of solar photovoltaic panels in high-temperature environments under direct sunlight; it sets up primary and secondary heat release systems to solve the problem of The waste heat is difficult to collect and utilize; the capillary network is used as the heat exchange device of the heat absorption and heat release system, which alleviates the problem that the heat exchange and cooling effect of the previous system is often accompanied by an increase in cost when the heat exchange device is selected. The heating water tank 11 is set to keep the hot water temperature constant, and the capillary filter is set under a certain thickness of soil layer, which alleviates the problem that the system performance is greatly affected by the external environment, greatly optimizes the system scheme, and proves through experiments that it has a certain economical effect. availability and feasibility.

Specific embodiment two: the difference between this embodiment and specific embodiment one is: the outer diameter of the main pipe of the first capillary network 2 is 20 mm, and the wall thickness is 2 mm; the outer diameter of the capillary of the first capillary network 2 The diameter is 4.3mm and the wall thickness is 0.8mm. Others are the same as the first embodiment.

Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that: the outer diameter of the main pipe of the second capillary network 3 is 20 mm, and the wall thickness is 2 mm; the capillary of the first capillary network 2 The outer diameter is 4.3mm and the wall thickness is 0.8mm. Others are the same as those in Embodiment 1 or 2.

Embodiment 4: The difference between this embodiment and Embodiment 1 to 3 is that: the outer diameter of the main pipe of the third capillary network 14 is 20 mm, and the wall thickness is 2 mm; The capillary has an outer diameter of 4.3 mm and a wall thickness of 0.8 mm. Others are the same as one of the specific embodiments 1 to 3.

Embodiment 5: This embodiment differs from Embodiment 4 in that a valve needs to be provided on the pipeline between the water outlet of the heat exchange tank 4 and the water inlet of the heating water tank 11 . Others are the same as in Embodiment 4.

The utility model is verified with following test:

Test 1: This test is a solar photovoltaic photothermal integrated system that uses capillary tubes to recover waste heat, as shown in Figure 1. 4. The first water level sensor 5, the controller 6, the first water pump 8, the electric heater 9, the heating water tank 11, the temperature and pressure safety valve 12, the third capillary network 14, the second water pump 15, the second water level sensor 16 and the temperature Sensor 17 forms;

The first capillary network 2 is fixed on the outer wall of the solar photovoltaic panel 1, the water outlet of the first capillary network 2 is connected with the water inlet of the second capillary network 3, and the water outlet of the second capillary network 3 is connected with the third capillary network 14 The water inlet of the third capillary network 14 is connected with the water inlet of the first capillary network 2, and the second water pump is arranged on the pipeline between the water outlet of the third capillary network 14 and the water inlet of the first capillary network 2 15;

The second capillary network 3 is arranged in the heat exchange tank 4, the tap water inlet pipe 7 is arranged on the heat exchange tank 4, the first water level sensor 5 is arranged in the heat exchange tank 4, the signal output terminal of the first water level sensor 5 is connected with the controller 6 The signal input terminal is connected, the water outlet of the heat exchange tank 4 is connected with the water inlet of the heating water tank 11, and the first water pump 8 is arranged on the pipeline between the water outlet of the heat exchange tank 4 and the water inlet of the heating water tank 11, and the heating water tank 11 Electric heater 9, temperature sensor 17 and the second water level sensor 16 are set, and the signal output ends of electric heater 9, temperature sensor 17 and the second water level sensor 16 are connected with the signal input end of controller 6 respectively, on the heating water tank 11 The temperature and pressure safety valve 12 and the water outlet pipe 10 are set; the third capillary network 14 is buried in the soil 13 of the vegetation.

In this experiment, a set of solar photovoltaic photothermal integrated system using capillary tube recycling waste heat technology is designed. The system is divided into two parts: heat absorption system and heat release system. The heat absorption system is mainly composed of a solar photovoltaic panel 1 and a second capillary network 3 for cooling it. The surface temperature of the solar photovoltaic panel 1 continues to rise due to long-term exposure to the sun, and the flowing water energy in the second capillary network 3 continuously takes away the heat of the solar photovoltaic panel 1, reducing the surface temperature of the solar photovoltaic panel 1 to maintain its Relatively high power generation efficiency.

The heat release system is further divided into primary heat release and secondary heat release: the primary heat release refers to heat exchange between the heat absorbed from the solar photovoltaic panel 1 and the urban upper water in the heat exchange tank 4 to prepare domestic hot water (urban upper water). Water enters the heat exchange tank 4 through the tap water inlet pipe 7, and the domestic hot water is drawn from the heating water tank 11 through the water outlet pipe 10). The heater 9 heats to meet the needs of users; the second heat release refers to flowing the cooling water with residual temperature after the first heat release through the soil 13 of the vegetation, and regulates the root of the plant to reach a stable temperature to promote the growth and development of the plant. Because capillary tubes are small in size, light in weight, low in cost, and high in heat exchange efficiency, capillary tubes are used as heat exchangers in both heat absorption and heat release systems. The entire system is powered by a water pump.

In this test, in the heat exchange tank 4 and the heating water tank 11, the water temperature and water level are intelligently controlled by the controller 6, so as to realize the automatic regulation and management of building equipment and save manpower and material resources.

In this experiment, the capillary network is still used as the heat release device in the secondary heat release system, because the fertile soil full of vegetation transmits heat slowly and less, and the deeper the soil layer, the less affected the soil temperature is by the external temperature. The capillary here is buried under the vegetation and the soil layer, so the heat release process has little influence with the change of the ambient temperature, can fully release heat, and effectively maintains the stable cycle operation of the system. In this test, according to the location of the solar photovoltaic panel 1, the nearest vegetation location is selected, which may be the vegetation on the roof or the vegetation on the ground. After the secondary heat release, the cooling water returns to the first capillary network 2 to cool down the solar photovoltaic panel 1 through the second water pump 15 , so as to circulate again.

Advantages of this test:

1) In this implementation mode, clean energy solar energy is used as the main energy source in buildings, and a part directly utilizes sunlight irradiated on photovoltaic panels for photovoltaic power generation; consumption;

2) In this embodiment, the capillary network with small volume, light weight, low cost and high heat exchange efficiency is used as the heat exchange device in both the heat absorption and heat release systems, and water with a large specific heat is used as the heat transfer medium at the same time, which greatly improves Enhance the heat transfer effect and ensure the photoelectric conversion efficiency of solar energy;

3) In this embodiment, the cooling water heated by the photovoltaic panels assists the growth of plants after exchanging heat with domestic water, so as to realize multi-stage utilization of waste heat.

According to the experimental research, the performance of the solar photovoltaic photothermal integrated system using capillary tubes to recover waste heat is better. After cooling the photovoltaic panels per unit area, the power generation efficiency of the photovoltaic panels increases by more than 10%.

Compared with previous research results, this system reduces the temperature of photovoltaic panels and solves the problem of low power generation efficiency of solar photovoltaic panels in high-temperature environments under direct sunlight; it sets up primary and secondary heat release systems to solve the problem of The waste heat is difficult to collect and utilize; the capillary network is used as the heat exchange device of the heat absorption and heat release system, which alleviates the problem that the heat exchange and cooling effect of the previous system is often accompanied by an increase in cost when the heat exchange device is selected. The heating water tank 11 is set to keep the hot water temperature constant, and the capillary filter is set under a certain thickness of soil layer, which alleviates the problem that the system performance is greatly affected by the external environment, greatly optimizes the system scheme, and proves through experiments that it has a certain economical effect. availability and feasibility.

Claims (5)

1. a kind of photovoltaic and photothermal solar integral system using capillary recycling waste heat, it is characterised in that returned using capillary The photovoltaic and photothermal solar integral system for receiving waste heat is by solar energy photovoltaic panel (1), the first capillary network (2), the second capillary Pipe network (3), heat-exchanging water tank (4), the first water level sensor (5), controller (6), the first water pump (8), electric heater (9), heating Water tank (11), temperature, pressure safety valve (12), third capillary network (14), the second water pump (15), the second water level sensor (16) It is formed with temperature sensor (17)；

First capillary network (2) is fixed on the outer wall of solar energy photovoltaic panel (1), the water outlet of the first capillary network (2) It is connected to the water inlet of the second capillary network (3), the water outlet of the second capillary network (3) and the water inlet of third capillary network (14) Mouth connection, the water outlet of third capillary network (14) are connected to the water inlet of the first capillary network (2), third capillary network (14) Water outlet and the first capillary network (2) water inlet between pipeline on the second water pump (15) are set；

Second capillary network (3) is arranged in heat-exchanging water tank (4), and tap water inlet pipe (7) are arranged on heat-exchanging water tank (4), heat exchange The first water level sensor (5) are set in water tank (4), the signal output end of the first water level sensor (5) and the signal of controller (6) Input terminal connection, the water outlet of heat-exchanging water tank (4) are connected to the water inlet of heating water tank (11), the water outlet of heat-exchanging water tank (4) It is arranged on pipeline between the water inlet of heating water tank (11) the first water pump (8), electric heater is set in heating water tank (11) (9), temperature sensor (17) and the second water level sensor (16), and electric heater (9), temperature sensor (17) and the second water level The signal output end of sensor (16) is connect with the signal input part of controller (6) respectively, and temperature is arranged on (11) in heating water tank Pressure safety valve (12) and outlet pipe (10)；The third capillary network (14) is embedded in the soil (13) of vegetation.

2. a kind of photovoltaic and photothermal solar integral system using capillary recycling waste heat according to claim 1, The outer diameter for being characterized in that the supervisor of first capillary network (2) is 20mm, wall thickness 2mm；First capillary network (2) outer diameter of capillary is 4.3mm, wall thickness 0.8mm.

3. a kind of photovoltaic and photothermal solar integral system using capillary recycling waste heat according to claim 1, The outer diameter for being characterized in that the supervisor of second capillary network (3) is 20mm, wall thickness 2mm；First capillary network (2) outer diameter of capillary is 4.3mm, wall thickness 0.8mm.

4. a kind of photovoltaic and photothermal solar integral system using capillary recycling waste heat according to claim 1, The outer diameter for being characterized in that the supervisor of the third capillary network (14) is 20mm, wall thickness 2mm；First capillary network (2) outer diameter of capillary is 4.3mm, wall thickness 0.8mm.

5. a kind of photovoltaic and photothermal solar integral system using capillary recycling waste heat according to claim 1, It is characterized in that valve is arranged on the pipeline between the water outlet of heat-exchanging water tank (4) and the water inlet of heating water tank (11).