A double-sided photovoltaic window ventilation system

Abstract

The present invention discloses a double-sided photovoltaic window ventilation system. The double-sided photovoltaic is installed on the outer surface of the building's exterior wall, and the reflective film is installed on the inner surface of the building's exterior wall, leaving an air passage in the middle. Ventilation holes are left above and below the double-sided photovoltaic to connect the outdoor air with the air passage, and ventilating holes are also left above and below the reflective film. The upper vent connects the air passage with an air treatment system composed of an evaporator, a condenser, a compressor and a throttle valve, and the lower vent connects the indoor air with the air passage. The double-sided photovoltaic window ventilation system with the above-mentioned optimized design enhances indoor and outdoor ventilation, and due to the characteristic that both sides of the double-sided photovoltaic can generate electricity, the reflection of solar radiation by the reflective film improves the power generation efficiency of the back of the double-sided photovoltaic, and at the same time, when air flows through the back of the double-sided photovoltaic, it will cool the double-sided photovoltaic, so that the photovoltaic efficiency is further improved.

Description

Technical Field

[0001] The invention relates to the field of photovoltaic cells, and in particular to a double-sided photovoltaic window ventilation system. Background Art

[0002] my country is rich in solar energy resources. Photovoltaic power generation, as an effective way to utilize solar energy, has received widespread attention from the society because of its clean and convenient characteristics. Among them, bifacial photovoltaics, as a promising technology, has been widely recognized by the domestic and foreign markets for its high efficiency in power generation, and has accounted for about 60% of the market share in recent years. Unlike the ordinary single-sided crystalline silicon cells used in traditional single-sided photovoltaics, bifacial photovoltaics use unique bifacial photovoltaic cells and use transparent glass instead of traditional backplanes. Both sides can generate electricity (the back side absorbs the solar radiation reflected by the environment to generate electricity), and the power generation efficiency is 4%-30% higher than that of ordinary single-sided photovoltaics. However, photovoltaic modules, especially bifacial photovoltaics, will generate heat during use, causing their own temperature to rise and the power generation efficiency to decrease. The excessive temperature of the modules during operation affects the power generation efficiency, which has become a problem.

[0003] On the other hand, building ventilation energy consumption is the main component of building energy consumption, accounting for more than two-thirds. In summer, the temperature of indoor exhaust air is low, and directly exhausting it to the outside will waste energy; in winter, the temperature of fresh air is low, and the energy consumption of processing fresh air is high. How to utilize the cold air in these air and further reduce building energy consumption has become a problem. Summary of the invention

[0004] In order to solve the technical problems existing in the background technology, the present invention proposes a double-sided photovoltaic window ventilation system. Different from the existing single-sided photovoltaic system / curtain wall, the advantages of the double-sided photovoltaic system are: 1. Both sides of the double-sided photovoltaic panel can generate electricity. The front side absorbs direct solar radiation to generate electricity, and the back side absorbs reflected radiation reflected by the environment to generate electricity. The power generation efficiency is higher than that of single-sided photovoltaic panels; 2. By installing a reflective heat insulation film behind the double-sided photovoltaic panel, the amount of reflected radiation received by the back side of the photovoltaic panel is increased, and the power generation efficiency is further improved; 3. Due to the additional thermoelectric effect of the back side when generating electricity, more waste heat can be generated for the system to use (such as preheating indoor fresh air in winter); 4. Due to the reasonable arrangement of the cells on the double-sided photovoltaic panel, the double-sided photovoltaic window can also provide suitable lighting for the room.

[0005] A double-sided photovoltaic window system proposed by the present invention comprises: a double-sided photovoltaic panel, a reflective film, a first vent, a second vent, a third vent, a fourth vent, a fifth vent, a sixth vent, a seventh vent, a first valve, a second valve, a third valve, a fourth valve, a fifth valve, a first axial flow fan, a second axial flow fan, a first heat exchanger, a second heat exchanger, a compressor, a throttle valve, and a refrigerant;

[0006] The double-sided photovoltaic is installed on the outer surface of the building's exterior wall, and the reflective film is installed on the inner surface of the building's exterior wall. An air channel is left between the double-sided photovoltaic and the reflective film, and ventilation holes are left at the top and bottom.

[0007] The first heat exchanger, the second heat exchanger, the compressor and the throttle valve are interconnected by pipelines to form an air handling unit, and a refrigerant is installed in the pipeline;

[0008] The fifth vent is the indoor return air inlet, the sixth vent is the indoor supply air outlet, and the seventh vent is the fresh air inlet.

[0009] Furthermore, the first heat exchanger is installed outdoors, and the second heat exchanger is installed indoors.

[0010] Furthermore, a first vent is located on the upper side of the double-sided photovoltaic system, connecting outdoor air with the air passage, and a first valve and a first axial flow fan are installed at the opening entrance, and the first valve is installed on the outside of the first axial flow fan.

[0011] Furthermore, a second vent is located at the lower side of the double-sided photovoltaic panel, connecting the outdoor air with the air passage, and a second valve is installed at the entrance of the second vent.

[0012] Furthermore, the third ventilation port is located on the upper side of the reflective film, connecting the air passage and the air processing unit, and a third valve is installed at the inlet of the third ventilation port.

[0013] Furthermore, the fourth ventilation hole is located at the lower side of the reflective film, connecting the indoor air with the air passage, and a fourth valve is installed at the inlet of the fourth ventilation hole.

[0014] Furthermore, the third vent, the fifth vent, the seventh vent and the second heat exchanger are connected by an air duct, a fifth valve is installed at the inlet of the seventh vent, and a second axial flow fan is installed at the front end duct of the heat exchanger.

[0015] In the present invention, the proposed double-sided photovoltaic window ventilation system increases the solar radiation on the back of the double-sided photovoltaic due to the reflection of solar radiation by the reflective film, and increases the power generation efficiency. At the same time, the good thermal insulation performance of the reflective film reduces the loss of building energy consumption. At the same time, by combining the double-sided photovoltaic with the building ventilation system, the double-sided photovoltaic is cooled while the indoor air is discharged in the summer, and the double-sided photovoltaic is cooled and the fresh air is preheated when the outdoor fresh air is introduced in the winter, which not only improves the power generation efficiency of the double-sided photovoltaic, but also reduces the ventilation energy consumption of the building. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the summer operation diagram of the double-sided photovoltaic ventilation window;

[0017] Figure 2 This is the winter operation diagram of the double-sided photovoltaic ventilation window;

[0018] Figure 3 This is a schematic diagram of the structure of a double-sided photovoltaic module.

[0019] In the figure, 1 is a double-sided photovoltaic panel, 2 is a reflective film, 3 is a first vent, 4 is a second vent, 5 is a third vent, 6 is a fourth vent, 7 is a first heat exchanger, 8 is a second heat exchanger, 9 is a compressor, 10 is a throttle valve, 11 is a refrigerant, 12 is a fifth vent, 13 is a sixth vent, 14 is a seventh vent, 15 is a first valve, 16 is a first axial flow fan, 17 is a second valve, 18 is a third valve, 19 is a fourth valve, 20 is a fifth valve, and 21 is a second axial flow fan. DETAILED DESCRIPTION

[0020] The present invention is described in detail below with reference to the accompanying drawings, which is a preferred implementation case among the various implementation modes of the present application.

[0021] Specific implementation: Figure 1-2 As shown, the double-sided photovoltaic panel 1 is installed on the outer surface of the building's exterior wall, and the reflective film 2 is installed on the inner surface of the building's exterior wall. An air channel is left between the double-sided photovoltaic panel 1 and the reflective film 2, and vents 3, 4, 5, and 6 are left on the upper and lower sides; the first heat exchanger 7, the second heat exchanger 8, the compressor 9, and the throttle valve 10 are interconnected by pipelines to form an air handling unit, and a refrigerant 11 is installed in the pipeline; the fifth vent 12 is the indoor return air inlet, the sixth vent 13 is the indoor supply air outlet, and the seventh vent 14 is the fresh air inlet. The reflective film 2 is a reflective heat-insulating silver film with high reflectivity and excellent heat-insulating properties. When installed on the inner surface of the exterior wall, the reflected radiation received by the back of the double-sided photovoltaic panel 1 can be increased, and the power generation efficiency can be increased. At the same time, the good heat-insulating performance of the reflective film 2 reduces the loss of building energy consumption.

[0022] The first heat exchanger 7 is installed outdoors to exchange heat between the refrigerant and the outdoor air; the second heat exchanger 8 is installed indoors to process the indoor return air and fresh air to the supply air state.

[0023] The first ventilation opening 3 is located on the upper side of the double-sided photovoltaic panel 1 , connecting the outdoor air with the air passage, and a first valve 15 and a first axial flow fan 16 are installed at the opening entrance, and the first valve 15 is installed on the outside of the first axial flow fan 16 .

[0024] The second ventilation opening 4 is located at the lower side of the double-sided photovoltaic panel 1 , connecting the outdoor air with the air passage, and a second valve 17 is installed at the entrance of the second ventilation opening 4 .

[0025] The third ventilation opening 5 is located on the upper side of the reflective film 2 , connecting the air passage and the air processing unit. A third valve 18 is installed at the entrance of the third ventilation opening 5 .

[0026] The fourth ventilation opening 6 is located at the lower side of the reflective film 2 , connecting the indoor air with the air passage, and a fourth valve 19 is installed at the inlet of the fourth ventilation opening 6 .

[0027] The third vent 5, the fifth vent 12, the seventh vent 14 are connected to the second heat exchanger 8 via an air duct, a fifth valve 20 is installed at the inlet of the seventh vent 14, and a second axial flow fan 21 is installed at the front end duct of the heat exchanger.

[0028] In summer, the first valve 15, the fourth valve 19 and the fifth valve 20 are opened, the second valve 17 and the third valve 18 are closed, and the first axial flow fan 16 and the second axial flow fan 21 are opened. The indoor exhaust air enters the air passage through the fourth vent 5, and is finally discharged to the outside through the first vent 3. The indoor exhaust air temperature is low, which has a cooling effect on the double-sided photovoltaic panel 1, and the power generation efficiency of the double-sided photovoltaic panel 1 is further improved. At this time, the indoor air refrigeration system operates normally, and the fresh air enters from the seventh vent 14, mixes with the return air from the fifth vent 12, and is then processed by the air handling unit to the indoor air supply state, and the sixth vent 13 is used for air supply.

[0029] In winter, the second valve 17 and the third valve 18 are opened, the first valve 15, the fourth valve 19 and the fifth valve 20 are closed, the first axial flow fan 16 is closed, and the second axial flow fan 21 is opened. Outdoor air enters from the second vent 5, passes through the air passage, enters the third vent 5, and is mixed with the return air from the fifth vent 12, and then is processed by the air handling unit to the indoor air supply state, and is supplied by the sixth vent 13. In winter, the outdoor air temperature is relatively low, and while cooling the double-sided photovoltaic panel 1, it is also preheated, reducing the energy consumption of air processing to the air supply state.

Claims

1. A double-sided photovoltaic window ventilation system, characterized in that: include: A double-sided photovoltaic panel (1), a reflective film (2), a first vent (3), a second vent (4), a third vent (5), a fourth vent (6), a fifth vent (12), a sixth vent (13), a seventh vent (14), a first valve (15), a second valve (17), a third valve (18), a fourth valve (19), a fifth valve (20), a first axial flow fan (16), a second axial flow fan (21), a first heat exchanger (7), a second heat exchanger (8), a compressor (9), a throttle valve (10), and a refrigerant (11); the double-sided photovoltaic panel (1) and the reflective film (2) are arranged on opposite sides of the exterior wall of a building; A double-sided photovoltaic panel (1) is installed on the outer surface of the building's outer wall, and a reflective film (2) is installed on the inner surface of the building's outer wall. An air passage is left between the double-sided photovoltaic panel (1) and the reflective film (2), and a first vent (3), a third vent (5), a second vent (4), and a fourth vent (6) are respectively provided at the top and the bottom; a first heat exchanger (7), a second heat exchanger (8), a compressor (9), and a throttle valve (10) are interconnected by a pipeline to form an air handling unit, and a refrigerant (11) is installed in the pipeline; a fifth vent (12) is an indoor return air inlet, a sixth vent (13) is an indoor supply air outlet, and a seventh vent (14) is a fresh air inlet; The first heat exchanger (7) is installed outdoors, and the second heat exchanger (8) is installed indoors; A first vent (3) is arranged on the upper side of the double-sided photovoltaic panel (1) to connect outdoor air with the air passage; a first valve (15) and a first axial flow fan (16) are installed at the inlet of the first vent (3); and the first valve (15) is installed on the outside of the first axial flow fan (16); In summer, the first valve (15), the fourth valve (19) and the fifth valve (20) are opened, the second valve (17) and the third valve (18) are closed, and the first axial flow fan (16) and the second axial flow fan (21) are opened; in winter, the second valve (17) and the third valve (18) are opened, the first valve (15), the fourth valve (19) and the fifth valve (20) are closed, the first axial flow fan (16) is closed, and the second axial flow fan (21) is opened.

2. The double-sided photovoltaic window ventilation system according to claim 1, characterized in that: The second ventilation opening (4) is located at the lower side of the double-sided photovoltaic panel (1) and connects the outdoor air with the air passage; a second valve (17) is installed at the entrance of the second ventilation opening (4).

3. The double-sided photovoltaic window ventilation system according to claim 1, characterized in that: The third ventilation opening (5) is arranged on the upper side of the reflective film (2) and is connected to the air passage and the air processing unit. A third valve (18) is installed at the inlet of the third ventilation opening (5).

4. The double-sided photovoltaic window ventilation system according to claim 1, characterized in that: The fourth ventilation opening (6) is arranged at the lower side of the reflective film (2) and connects the indoor air with the air passage. A fourth valve (19) is installed at the inlet of the fourth ventilation opening (6).

5. The double-sided photovoltaic window ventilation system according to claim 1, characterized in that: The third ventilation port (5), the fifth ventilation port (12), the seventh ventilation port (14) and the second heat exchanger (8) are connected via an air duct; a fifth valve (20) is installed at the inlet of the seventh ventilation port (14); and a second axial flow fan (21) is installed at the front end duct of the heat exchanger.

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