Air-cooled photovoltaic photo-thermal low-carbon building energy supply system

Abstract

The invention provides an air-cooled photovoltaic photo-thermal low-carbon building energy supply system. The air-cooled photovoltaic photo-thermal low-carbon building energy supply system comprises a fresh air system, a solar heat collection heating system and a multi-energy complementary air conditioning system. The fresh air system is arranged on the wall of the shady side of a building and connected with the solar heat collecting and heating system and the multi-energy complementary air conditioning system. The solar heat collection heating system is arranged on the wall of the sunny side of a building and connected with the multi-energy complementary air conditioning system. In winter, the fresh air system supplies fresh air in a heat supplementing mode, and the multi-energy complementary air conditioning system utilizes air energy and solar energy to achieve solar energy direct heat collection heating and air source heat pump heating in winter; when heat is needed to adjust the indoor temperature in transition seasons, the fresh air system heats fresh air, and the multi-energy complementary air conditioning system heats indoor air and conveys heat to a room; in summer, ambient air is used for cooling the fresh air system and the multi-energy complementary air conditioning system, and high-performance power generation is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic buildings, and in particular to an air-cooled photovoltaic thermal low-carbon building energy supply system. Background Art

[0002] At present, the following problems are common in the research of building energy supply technology using photovoltaic thermal energy and its system application:

[0003] 1. In the photovoltaic and thermal utilization technology of buildings, there is a lack of an efficient air-cooled photovoltaic and thermal component that is closely integrated with the building. At present, most of them are simple double-layer ventilation walls or complex flow passages. Although they have certain thermal efficiency, their appearance does not conform to the concept of architectural design and is difficult to apply in actual design;

[0004] 2. Building fresh air lacks efficient active heat recovery fresh air devices and systems that can be coupled with solar thermal power benefits. If the fresh air system that ensures the health and comfort needs of personnel does not adopt energy-saving technologies, it will increase energy consumption by about 30%. Although heat pipes have extremely strong heat transfer efficiency, there is a large contact thermal resistance between circular copper heat pipes and semiconductors, which reduces the performance of such fresh air heat recovery;

[0005] 3. In the building heating system, the existing heating forms using solar energy and air energy have single functions, mostly using solar energy to preheat the air to supply air source heat pump heating, ignoring the working conditions of direct solar energy heating when solar radiation is sufficient, and lacking the design and operation mode of multi-energy complementary and efficient system according to changes in environmental conditions. Summary of the invention

[0006] In order to solve the problems of the existing building photovoltaic thermal utilization technology lacking high-efficiency air-cooled photovoltaic thermal components that are closely integrated with buildings, the lack of high-efficiency active heat recovery fresh air devices and systems for building fresh air that can be coupled with solar thermal power benefits, the single function of the heating form utilizing solar energy and air energy, and the lack of a multi-condition adaptable solar energy and air energy complementary coupling heating system, the present invention provides an air-cooled photovoltaic thermal low-carbon building energy supply system, which realizes the multiple functions of fresh air supply, building power supply, heating and cooling, so that energy can be used efficiently and reasonably.

[0007] The technical solution of the present invention is as follows:

[0008] A wind-cooled photovoltaic-thermal low-carbon building energy supply system comprises a fresh air system, a solar thermal heating system and a multi-energy complementary air-conditioning system; the fresh air system is arranged on the wall on the shady side of the building, and is respectively connected to the solar thermal heating system and the multi-energy complementary air-conditioning system; the solar thermal heating system is arranged on the wall on the sunny side of the building, and the solar thermal heating system is connected to the multi-energy complementary air-conditioning system.

[0009] Preferably, the fresh air system comprises a fresh air channel and an exhaust air channel, and the fresh air channel and the exhaust air channel are arranged side by side;

[0010] The fresh air channel is provided with a micro heat pipe array-building attached photovoltaic thermal assembly, a fresh air fan, a first electric air valve and a first micro heat pipe array-thermoelectric heat recovery device in sequence, and the first micro heat pipe array-thermoelectric heat recovery device is connected to the indoor air through a pipeline; a pipeline is provided between the fresh air fan and the first electric air valve to connect with the multi-energy complementary air conditioning system;

[0011] An exhaust fan and a second micro heat pipe array-thermoelectric heat recovery device are sequentially arranged on the exhaust passage; the exhaust fan is connected to the indoor air through a pipeline; and the second micro heat pipe array-thermoelectric heat recovery device is connected to the indoor air through a pipeline.

[0012] Preferably, the micro-heat pipe array-building attached photovoltaic thermal component includes a monocrystalline silicon photovoltaic component, a micro-heat pipe array, a fin duct and a thermal insulation layer arranged in sequence from top to bottom, the micro-heat pipe array is arranged on the back of the monocrystalline silicon photovoltaic component, the fin duct covers the condensation section of the micro-heat pipe array and is connected to the thermal insulation layer, and the thermal insulation layer is provided with two layers.

[0013] Preferably, the monocrystalline silicon photovoltaic module and the micro heat pipe array are bonded by thermally conductive silicone.

[0014] Preferably, the micro heat pipe array comprises a plurality of micro channels arranged in parallel, adjacent micro channels are separated by partitions, and micro fins are provided at both ends of the micro channels.

[0015] Preferably, the micro heat pipe array-thermoelectric heat recovery device includes a semiconductor thermoelectric sheet, a micro heat pipe array, staggered fins and an air duct. The cold surface and the hot surface of the semiconductor thermoelectric sheet are both provided with the micro heat pipe array, and the micro heat pipe array is provided with staggered fins. The semiconductor thermoelectric sheet and the micro heat pipe array and the staggered fins located on one side thereof form a unit, and the air duct is wrapped around the outside of the unit.

[0016] Preferably, the staggered fins are serrated, and the air duct is made of metal.

[0017] Preferably, the solar thermal heating system includes a heating fan, a second electric air valve and a micro-heat pipe array-building integrated photovoltaic thermal component. One side of the heating fan is connected to the multi-energy complementary air-conditioning system, and the other side is connected to the micro-heat pipe array-building integrated photovoltaic thermal component. The second electric air valve is arranged on the side of the micro-heat pipe array-building integrated photovoltaic thermal component away from the heating fan.

[0018] Preferably, the micro-heat pipe array-building integrated photovoltaic thermal assembly includes a cadmium telluride photovoltaic assembly, a micro-heat pipe array, a fin air duct and a thermal insulation layer arranged in sequence from top to bottom, the micro-heat pipe array is arranged on the back of the cadmium telluride photovoltaic assembly, the fin air duct covers the condensation section of the micro-heat pipe array and is connected to the thermal insulation layer, and the thermal insulation layer is provided with two layers.

[0019] Preferably, the multi-energy complementary air-conditioning system includes a third electric air valve, a heat collecting air hood and an air source heat pump heating component. The air source heat pump heating component is connected to the heating fan through a pipe, the third electric air valve is arranged between the heating fan and the air source heat pump heating component, and the heat collecting air hood is arranged on the front side of the air source heat pump heating component.

[0020] Compared with the prior art, the beneficial effects of the present invention are: in winter, the fresh air system of the present invention supplies fresh air by supplementing heat, and the multi-energy complementary air-conditioning system uses air energy and solar energy to realize direct solar energy collection heating and air source heat pump heating in winter; when heat is needed to adjust the indoor temperature in the transition season, the fresh air system heats the fresh air, and the multi-energy complementary air-conditioning system heats the indoor air to transport heat to the room; in summer, the ambient air is used to cool the fresh air system and the multi-energy complementary air-conditioning system to achieve high-performance power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the structure of a micro heat pipe array-building attached photovoltaic thermal assembly according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic structural diagram of a micro heat pipe array-thermoelectric heat recovery device according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of a micro heat pipe array-building attached photovoltaic thermal assembly coupled with heat and electricity to recover fresh air system according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of a micro heat pipe array-building integrated photovoltaic thermal assembly according to an embodiment of the present invention;

[0026] Figure 5This is a schematic diagram of a micro heat pipe array-building integrated photovoltaic thermal assembly coupled with an air source heat pump heating system according to an embodiment of the present invention.

[0027] Description of reference numerals:

[0028] 1: micro heat pipe array; 2: monocrystalline silicon photovoltaic module; 3: fin air duct; 4: insulation layer; 5: microchannel; 6: microfin; 7: partition; 8: air duct; 9: staggered fin; 10: semiconductor thermoelectric sheet; 11: micro heat pipe array-building attached photovoltaic thermal module; 12: air source heat pump heating module; 13: fresh air fan; 14: first electric air valve; 15: cadmium telluride photovoltaic module; 16: heat collecting air hood; 17: micro heat pipe array-building integrated photovoltaic thermal module; 18: first micro heat pipe array-thermoelectric heat recovery device; 19: second micro heat pipe array-thermoelectric heat recovery device; 20: heating fan; 21: second electric air valve; 22: third electric air valve; 23: exhaust fan. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figures 1 to 5 As shown, the present invention provides an air-cooled photovoltaic thermal low-carbon building energy supply system, including a fresh air system, a solar thermal heating system and a multi-energy complementary air conditioning system. The fresh air system is arranged on the wall of the building's back-sun side, and is connected to the solar thermal heating system and the multi-energy complementary air conditioning system respectively. The solar thermal heating system is arranged on the wall of the building's sun-facing side, and the solar thermal heating system is connected to the multi-energy complementary air conditioning system.

[0033] The present invention has two operating modes in winter: when the solar radiation is sufficient, the indoor air flows into the solar thermal heating system, is heated, and is then sent back to the room to bear the heat load, and the insufficient heat load is provided by the multi-energy complementary air-conditioning system; when the solar radiation is insufficient to heat the indoor return air, the outdoor air flows into the solar thermal heating system, is preheated, and is then sent to the multi-energy complementary air-conditioning system to improve the use conditions of the multi-energy complementary air-conditioning system and improve the COP of the unit.

[0034] In the summer cooling condition, the heat generated by solar radiation cannot be used by the system, so the outdoor air is adjusted to enter the solar thermal heating system to take away some heat and then discharged to the outside, using mechanical ventilation to reduce the temperature of the components and improve the photovoltaic power generation efficiency of the components. The electricity generated by the photovoltaic thermal components is used in the multi-energy complementary air conditioning system to reduce the amount of electricity consumed to meet the indoor cooling load demand.

[0035] The present invention still requires a certain amount of heat to buffer the changes in indoor temperature at some times during the transition season, and heat dissipation control needs to be done in advance at some times. Therefore, the system operating conditions in the transition season determine the operating conditions of the solar thermal heating system and the multi-energy complementary air-conditioning system based on the component temperature and indoor temperature.

[0036] In a more preferred embodiment, the fresh air system includes a fresh air channel and an exhaust channel, and the fresh air channel and the exhaust channel are arranged side by side. The fresh air channel is sequentially provided with a micro heat pipe array-building attached photovoltaic thermal assembly 11, a fresh air fan 13, a first electric air valve 14 and a first micro heat pipe array-thermoelectric heat recovery device 18, and the first micro heat pipe array-thermoelectric heat recovery device 18 is connected to the indoor air through a pipeline. A pipeline is provided between the fresh air fan 13 and the first electric air valve 14 to connect with the multi-energy complementary air conditioning system. The exhaust channel is sequentially provided with an exhaust fan 23 and a second micro heat pipe array-thermoelectric heat recovery device 19, and the exhaust fan 23 is connected to the indoor air through a pipeline, and the second micro heat pipe array-thermoelectric heat recovery device 19 is connected to the indoor air through a pipeline. The air-cooled building attached photovoltaic thermal assembly 11 is a core component for preheating air in the fresh air system. The fresh air fan 13 and the exhaust fan 23 are used to provide power, and the first electric air valve 14 is used for working condition switching.

[0037] In a more preferred embodiment, the micro heat pipe array-building attached photovoltaic thermal assembly 11 includes a monocrystalline silicon photovoltaic assembly 2, a micro heat pipe array 1, a fin air duct 3 and a thermal insulation layer 4 arranged in sequence from top to bottom. The micro heat pipe array 1 is arranged on the back of the monocrystalline silicon photovoltaic assembly 2. The fin air duct 3 covers the condensation section of the micro heat pipe array 1 and is connected to the thermal insulation layer 4. The thermal insulation layer 4 is provided with two layers, which are laid on the lower heat pipe evaporation section of the micro heat pipe array 1 and the back of the fin air duct 3. The thermal insulation layer 4 adopts a phenolic insulation board to reduce heat loss and make its structure flat. The monocrystalline silicon photovoltaic assembly 2 and the micro heat pipe array 1 are bonded by thermal conductive silicone. The micro heat pipe array 1 includes a plurality of micro channels 5 arranged in parallel, and the adjacent micro channels 5 are separated by partitions 7, and micro fins 6 are arranged at both ends of the micro channels 5.

[0038] When the monocrystalline silicon photovoltaic module 2 generates electricity during the day, the solar radiation heat is quickly transferred to the condensation section through the evaporation section at the bottom of the high-efficiency heat transfer element-micro heat pipe array 1. At the bottom of the condensation section, a fin duct 3 attached with thermal conductive silicone is used to collect the heat dissipation of the photovoltaic module. The fin duct 3 is composed of multiple small-aperture channels connected in parallel.

[0039] In a more preferred embodiment, the micro heat pipe array-thermoelectric heat recovery device includes a semiconductor thermoelectric sheet 10, a micro heat pipe array 1, staggered fins 9 and an air duct 8. The cold surface and hot surface of the semiconductor thermoelectric sheet 10 are respectively attached with the micro heat pipe array 1 using thermal conductive silicone, and staggered fins 9 are arranged on the micro heat pipe array 1. The semiconductor thermoelectric sheet 10 and the micro heat pipe array 1 and staggered fins 9 located on one side thereof constitute a unit. In subsequent applications, heat recovery devices of different capacities can be designed according to different heat load requirements. The air duct 8 is wrapped around the outside of the unit, and the air duct 8 is made of metal. The staggered fins 9 are serrated, and the serrated staggered fins 9 are attached to the micro heat pipe array 1. On the one hand, the heat exchange area with the air is increased, and on the other hand, the air flow is disturbed to increase the convective heat transfer coefficient, thereby obtaining a higher heat recovery efficiency.

[0040] In a more preferred embodiment, the solar thermal heating system includes a heating fan 20, a second electric air valve 21 and a micro heat pipe array-building integrated photovoltaic thermal component 17. One side of the heating fan 20 is connected to the multi-energy complementary air conditioning system, and the other side is connected to the micro heat pipe array-building integrated photovoltaic thermal component 17. The second electric air valve 21 is arranged on the side of the micro heat pipe array-building integrated photovoltaic thermal component 17 away from the heating fan 20.

[0041] In a more preferred embodiment, the micro heat pipe array-building integrated photovoltaic thermal assembly 17 includes a cadmium telluride photovoltaic assembly 15, a micro heat pipe array 1, a fin air duct 3 and a thermal insulation layer 4 arranged in sequence from top to bottom. The back of the cadmium telluride photovoltaic assembly 15 is provided with a micro heat pipe array 1, and the fin air duct 3 covers the condensation section of the micro heat pipe array 1 and is connected to the thermal insulation layer 4, and the thermal insulation layer 4 is provided with two layers. The back of the cadmium telluride photovoltaic assembly 15 (or other photovoltaic assembly that is easy to integrate with the building) uses thermal conductive silicone to attach several micro heat pipe arrays 1. When the cadmium telluride photovoltaic assembly 15 (or other photovoltaic assembly that is easy to integrate with the building) is working and generating electricity during the day, the solar radiation heat is quickly transferred to the condensation section through the evaporation section at the bottom of the micro heat pipe array 1, a high-efficiency heat transfer element, and the fin air duct 3 is attached at the bottom of the condensation section using thermal conductive silicone to collect the heat dissipation of the micro heat pipe array-building integrated photovoltaic thermal assembly 17. The fin air duct 3 is composed of multiple small-aperture channels connected in parallel. A heat preservation layer 4 is laid on the back of the heat pipe evaporation section and the fin air duct 3 at the lower part of the micro heat pipe array 1 to reduce heat loss and make the structure flat.

[0042] In a more preferred embodiment, the multi-energy complementary air conditioning system includes a third electric air valve 22, a heat collecting air cover 16 and an air source heat pump heating component 12, the air source heat pump heating component 12 is connected to the heating fan 20 through a pipeline, the third electric air valve 22 is arranged between the heating fan 20 and the air source heat pump heating component 12, and the heat collecting air cover 16 is arranged in front of the air source heat pump heating component 12. Due to the problem of discontinuous and unstable solar energy and the inability to actively provide cooling, in order to ensure the basic cooling and heating load requirements of the building, it is still necessary to configure the air source heat pump heating component 12 as a supplement. At present, the air source heat pump heating component 12 uses energy in the air, has a simple system and occupies a small area, and is suitable for most parts of the country. Therefore, the air source heat pump is selected as the guarantee unit for the building load.

[0043] By judging the components, ambient air and indoor temperature, different working conditions are switched to achieve flexibility under different environmental conditions and indoor load requirements. The micro heat pipe array-building integrated photovoltaic thermal component 17 coupled with the air source heat pump heating component 12 has two operating modes in winter: when the solar radiation is sufficient, the indoor air flows into the micro heat pipe array-building integrated photovoltaic thermal component 17, is heated and sent back to the room to bear the heat load, and the insufficient heat load is provided by the air source heat pump heating component 12. When the solar radiation is not enough to heat the indoor return air, the indoor air valve is closed, and the outdoor air flows into the micro heat pipe array-building integrated photovoltaic thermal component 17 for preheating and then sent to the air source heat pump to improve the use conditions of the air source heat pump heating component 12 and improve the unit COP.

[0044] In summer cooling conditions, the heat generated by solar radiation cannot be used by the system, so the valve group is adjusted to allow outdoor air to enter the component to take away some heat before being discharged outdoors, using mechanical ventilation to reduce the component temperature and improve the photovoltaic power generation efficiency of the component. The electric energy generated by the micro heat pipe array-building integrated photovoltaic thermal component 17 is used by the air source heat pump heating component 12 to reduce the amount of electricity consumed to meet the indoor cooling load demand.

[0045] During the transition season, a certain amount of heat is still needed to buffer the changes in indoor temperature at some times, and the heat dissipation control of components needs to be done in advance at some times. Therefore, the system operating conditions in the transition season determine the operating conditions of solar thermal heating and fan heat dissipation based on the component temperature and indoor temperature.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air-cooled photovoltaic thermal low-carbon building energy supply system, characterized in that: It includes a fresh air system, a solar thermal heating system and a multi-energy complementary air-conditioning system; the fresh air system is arranged on the wall on the shady side of the building, and is respectively connected to the solar thermal heating system and the multi-energy complementary air-conditioning system; the solar thermal heating system is arranged on the wall on the sunny side of the building, and the solar thermal heating system is connected to the multi-energy complementary air-conditioning system.

2. The air-cooled photovoltaic thermal low-carbon building energy supply system according to claim 1 is characterized in that: The fresh air system comprises a fresh air channel and an exhaust air channel, wherein the fresh air channel and the exhaust air channel are arranged side by side; The fresh air passage is provided with a micro heat pipe array-building attached photovoltaic thermal assembly (11), a fresh air blower (13), a first electric air valve (14) and a first micro heat pipe array-thermoelectric heat recovery device (18) in sequence, wherein the first micro heat pipe array-thermoelectric heat recovery device (18) is connected to the indoor air through a pipeline; a pipeline is provided between the fresh air blower (13) and the first electric air valve (14) to connect to the multi-energy complementary air conditioning system; An exhaust fan (23) and a second micro heat pipe array-thermoelectric heat recovery device (19) are sequentially arranged on the exhaust passage; the exhaust fan (23) is connected to the indoor air through a pipeline; and the second micro heat pipe array-thermoelectric heat recovery device (19) is connected to the indoor air through a pipeline.

3. The air-cooled photovoltaic thermal low-carbon building energy supply system according to claim 2 is characterized in that: The micro heat pipe array-building attached photovoltaic thermal assembly (11) comprises a monocrystalline silicon photovoltaic assembly (2), a micro heat pipe array (1), a fin air duct (3) and a thermal insulation layer (4) arranged in sequence from top to bottom, wherein the micro heat pipe array (1) is arranged on the back of the monocrystalline silicon photovoltaic assembly (2), the fin air duct (3) covers the condensation section of the micro heat pipe array (1) and is connected to the thermal insulation layer (4), and the thermal insulation layer (4) is provided with two layers.

4. The air-cooled photovoltaic thermal low-carbon building energy supply system according to claim 3 is characterized in that: The monocrystalline silicon photovoltaic module (2) and the micro heat pipe array (1) are bonded together by thermally conductive silicone.

5. The air-cooled photovoltaic thermal low-carbon building energy supply system according to claim 4 is characterized in that: The micro heat pipe array (1) comprises a plurality of micro channels (5) arranged in parallel, adjacent micro channels (5) are separated by partitions (7), and micro fins (6) are arranged at both ends of the micro channels (5).

6. The air-cooled photovoltaic thermal low-carbon building energy supply system according to claim 2 is characterized in that: The micro heat pipe array-thermoelectric heat recovery device comprises a semiconductor thermoelectric sheet (10), a micro heat pipe array (1), staggered fins (9) and an air duct (8); the cold surface and the hot surface of the semiconductor thermoelectric sheet (10) are both provided with the micro heat pipe array (1); the staggered fins (9) are provided on the micro heat pipe array (1); the semiconductor thermoelectric sheet (10) and the micro heat pipe array (1) and the staggered fins (9) located on one side thereof form a unit; and the air duct (8) is wrapped around the outside of the unit.

7. The air-cooled photovoltaic thermal low-carbon building energy supply system according to claim 6 is characterized in that: The staggered fins (9) are sawtooth-shaped, and the air duct (8) is made of metal.

8. The air-cooled photovoltaic thermal low-carbon building energy supply system according to claim 1 is characterized in that: The solar thermal heating system comprises a heating fan (20), a second electric air valve (21) and a micro heat pipe array-building integrated photovoltaic thermal component (17); one side of the heating fan (20) is connected to the multi-energy complementary air conditioning system, and the other side is connected to the micro heat pipe array-building integrated photovoltaic thermal component (17); the second electric air valve (21) is arranged on a side of the micro heat pipe array-building integrated photovoltaic thermal component (17) away from the heating fan (20).

9. The air-cooled photovoltaic thermal low-carbon building energy supply system according to claim 8 is characterized in that: The micro heat pipe array-building integrated photovoltaic thermal assembly (17) comprises a cadmium telluride photovoltaic assembly (15), a micro heat pipe array (1), a fin air duct (3) and a thermal insulation layer (4) which are arranged in sequence from top to bottom. The micro heat pipe array (1) is arranged on the back of the cadmium telluride photovoltaic assembly (15). The fin air duct (3) covers the condensation section of the micro heat pipe array (1) and is connected to the thermal insulation layer (4). The thermal insulation layer (4) is provided with two layers.

10. The air-cooled photovoltaic thermal low-carbon building energy supply system according to claim 9 is characterized in that: The multi-energy complementary air conditioning system comprises a third electric air valve (22), a heat collecting air hood (16) and an air source heat pump heating component (12); the air source heat pump heating component (12) is connected to the heating fan (20) through a pipeline; the third electric air valve (22) is arranged between the heating fan (20) and the air source heat pump heating component (12); and the heat collecting air hood (16) is arranged on the front side of the air source heat pump heating component (12).

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