A building energy supply system

Abstract

This invention discloses a PVT thermal storage wall and a building energy supply system. The system includes a PVT thermal storage wall and a heat pump. In the PVT thermal storage wall, photovoltaic panels utilize Fresnel lens polymerization and reflective coating to generate heat from solar energy. A unidirectional heat pipe absorbs the heat from the photovoltaic panels and reflective coating and stores the heat in a solid thermal storage body. In heating scenarios, the heat in the solid thermal storage body drives the heat pump to provide heating all day long. It can also be applied to cooling and heating scenarios, using the heat pump to supply domestic hot water year-round. The cooling and heating unit provides heating in winter and cooling in summer. During cooling, the condenser heat dissipation is stored in the thermal storage wall, providing heat for the domestic hot water heat pump. Placing the system at the corner of the exterior wall can reduce the impact of cold bridges. This invention utilizes PVT technology and the energy storage function of the thermal storage wall to improve the thermal insulation performance of the building envelope and reduce the building's consumption of traditional energy, solving the problem of effective utilization of solar energy, meeting the cooling and heating needs of domestic life, and achieving energy-saving and environmentally friendly building development.

Description

Technical Field

[0001] This invention belongs to the field of solar energy application and building energy conservation, specifically relating to a PVT thermal storage wall and building energy supply system. Background Technology

[0002] The building sector is one of the three major energy consumption sectors in my country, with heating and cooling energy consumption accounting for more than half of total building energy consumption. Meanwhile, carbon emissions during building operation account for more than 20% of my country's total carbon emissions, making it a crucial link in achieving my country's carbon peak and carbon neutrality goals. There are two main ways to reduce building cooling / heating energy consumption and corresponding carbon emissions: first, improve the thermal insulation performance of the building envelope to reduce the building's heating and cooling load at the source; second, efficiently utilize renewable energy sources to reduce the building's dependence on fossil fuels.

[0003] Solar energy, as a natural energy source, demonstrates unique advantages due to its abundant reserves and clean, environmentally friendly nature. Photovoltaic-thermal (PVT) technology is a highly efficient solar energy utilization technology that achieves both photoelectric conversion and solar thermal utilization, not only improving photoelectric conversion efficiency but also fully utilizing solar energy. Thermal storage materials store heat or cold energy and release it when needed, thereby improving energy utilization efficiency. Integrating PVT and energy storage technologies organically into building envelopes can not only improve the thermal insulation performance of building envelopes but also efficiently utilize solar energy to meet the building's cooling, heating, and electrical energy needs, effectively promoting energy conservation and emission reduction during building operation. This is a worthy research topic for achieving deep development and utilization of solar energy and building-integrated solar energy. Summary of the Invention

[0004] The purpose of this invention is to design a PVT (Polyvoltine Transformer) thermal storage wall and building energy supply system that can provide electricity, cooling, heating, and domestic hot water, considering the energy needs of buildings in different regions. Based on the photovoltaic / thermal conversion principle, the photovoltaic panels in the PVT thermal storage wall generate electricity and heat simultaneously using solar energy. This heat is transferred to a solid thermal storage medium within the wall via unidirectional heat pipes. The heat from the solid thermal storage medium drives a heat pump for continuous heating. In cooling scenarios, heat from inside the building is transferred to the solid thermal storage medium in the wall as a heat source. This invention aims to utilize the thermal storage function of the thermal storage wall to fully utilize solar energy and building waste heat, reduce the building's dependence on traditional energy sources, solve the problem of efficient solar energy utilization, and meet the building's energy needs.

[0005] The technical solution of this invention to solve the technical problem is as follows:

[0006] A building energy supply system, characterized in that it includes a PVT thermal storage wall and a heat pump. The PVT thermal storage wall includes a front insulation layer, a left insulation layer, a rear insulation layer, a right insulation layer, an upper insulation layer, a lower insulation layer, a reflective coating, a photovoltaic panel, an aluminum plate, a unidirectional heat pipe, a solid thermal storage body, a glass cover, a Fresnel lens, and a heat pump evaporator coil. The heat pump evaporator coil is sequentially connected to a compressor, a condenser, and an expansion valve via refrigerant piping. The heat pump evaporator coil, compressor, condenser, and expansion valve form a closed heat pump circulation path. A hot water storage tank is installed outside the condenser, and the condenser is immersed in the hot water storage tank. One side of the PVT thermal storage wall can be connected to the heat pump, and the other side of the PVT thermal storage wall is connected to the evaporator / condenser coil. The other end of the evaporator / condenser coil is connected to a heating and cooling unit. The hot water side pipe of the hot water storage tank is connected to a hot water supply pipe and a water replenishment pipe.

[0007] Preferably, the heating and cooling unit further includes a four-way reversing valve, a heat exchanger, and an energy storage tank; the evaporator / condenser coil, the four-way reversing valve, the heat exchanger, and the expansion valve are sequentially connected through refrigerant pipelines to form a closed loop; the four-way reversing valve enables the switching between heating and cooling modes of the unit; the heat exchanger is submerged in the energy storage tank, and the energy storage tank is connected to heating / cooling water supply pipes and heating / cooling water return pipes respectively.

[0008] Preferably, the aluminum plate has a serrated longitudinal section with a serration angle twice that of the local latitude, and the outer surface of the aluminum plate is coated with a black selective coating.

[0009] Preferably, the heat pump evaporator coil is made of copper and is arranged in a serpentine pattern within the solid heat storage body. The heat pump evaporator coil is connected to the PVT heat storage wall on the same side, with the inlet at the bottom and the outlet at the top.

[0010] Preferably, the photovoltaic panel is pressurized and adhered to the front side of the aluminum plate at an acute angle to the ground plane, and the adhesive is ethylene-vinyl acetate copolymer (EVA).

[0011] Preferably, the reflective coating is sprayed on the front side of the aluminum plate where the angle between the aluminum plate and the ground plane is obtuse, and the angle between the reflective coating and the adjacent photovoltaic panel on the lower side is no greater than 90°.

[0012] Preferably, the unidirectional heat pipe is a flat, closed copper heat pipe, with the evaporation section of the unidirectional heat pipe welded to the back of the aluminum plate, and the condensation section of the unidirectional heat pipe penetrating the solid heat storage body at a slightly upward angle.

[0013] Preferably, the front insulation layer is adhered to the back of the aluminum plate, the unidirectional heat pipe evaporation section is tightly bonded to the front insulation layer, and the longitudinal section of the front insulation layer is serrated.

[0014] Preferably, the front insulation layer, left insulation layer, rear insulation layer, right insulation layer, upper insulation layer and lower insulation layer form a closed heat storage cavity, which is filled with solid heat storage material.

[0015] Preferably, the glass cover is made of tempered coated glass, and an air cavity is formed between the glass cover and the aluminum plate.

[0016] Preferably, the Fresnel lens is adhered to the inside of the glass cover plate using a silicone vacuum method.

[0017] Preferably, the PVT heat storage wall can be arranged at the edge of the building's exterior wall, or it can be arranged in an L-shape at the corner of the building's exterior wall, with the heat pump placed on the ground or on the equipment mounting platform on the building's exterior wall.

[0018] Preferably, the evaporator / condenser coil is made of copper and is arranged in a serpentine pattern in the solid heat storage body. The evaporator / condenser coil and the PVT heat storage wall are connected in a bottom-in, top-out manner on the same side.

[0019] Preferably, solar radiation passes through the outer glass cover and is focused onto the photovoltaic panel by the Fresnel lens on the inner side of the glass cover. The reflective coating reflects some of the light to the adjacent photovoltaic panel below, and the photovoltaic panel achieves photoelectric conversion. The evaporation section of the unidirectional heat pipe absorbs the light and heat from the aluminum plate and the photovoltaic panel. After the heat transfer medium in the unidirectional heat pipe absorbs heat and evaporates, it flows to the condensation section of the unidirectional heat pipe, transferring heat to the solid heat storage body and condensing it. The condensate in the condensation section of the unidirectional heat pipe flows back to the evaporation section of the unidirectional heat pipe by gravity.

[0020] Preferably, in a heating scenario, the refrigerant in the heat pump evaporator coil absorbs heat from the solid heat storage body and evaporates. After being pressurized by the compressor, it heats the water in the hot water storage tank through the condenser, and then returns to the heat pump evaporator coil through the expansion valve to achieve heating.

[0021] Preferably, in a cooling / heating supply scenario, the heat pump supplies domestic hot water year-round. In winter, the refrigerant in the evaporator / condenser coil absorbs heat from the solid heat storage medium, enters the compressor in the heating / cooling unit via a four-way reversing valve for compression, and then enters the heat exchanger to release heat to the water in the energy storage tank. The hot water in the energy storage tank is used for heating / cooling water supply pipes. In summer, the heating / cooling water return pipes transfer heat from inside the building to the energy storage tank. The refrigerant in the heat exchanger absorbs heat and evaporates, enters the compressor in the heating / cooling unit via a four-way reversing valve for compression, and then enters the evaporator / condenser coil. After transferring heat to the solid heat storage medium, it returns to the heat exchanger via the expansion valve in the heating / cooling unit to absorb heat from the energy storage tank. The low-temperature water in the energy storage tank is used for cooling inside the building via the heating / cooling water supply pipes. The heat transferred from inside the building to the solid heat storage medium is supplied to the heat pump's evaporator coil.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. Utilize the photoelectric and photothermal conversion principle to improve photovoltaic power generation efficiency and make efficient use of solar energy;

[0024] 2. Solid heat storage effectively stores heat and can stably serve as a high-quality heat source for heat pumps, solving the building heating needs at night or on rainy days;

[0025] 3. The unidirectional heat pipe is flat, which facilitates firm welding to the back of the aluminum plate and increases the heat exchange area between the heat pipe and the aluminum plate;

[0026] 4. The condensing section of the heat pipe is slightly inclined upward and higher than the evaporating section of the heat pipe. After the medium inside the heat pipe releases heat in the condensing section, it can easily flow back to the evaporating section by gravity. It can also prevent the heat from being transferred from the solid heat storage body to the aluminum plate in the opposite direction due to the low temperature of the aluminum plate at night. This ensures that the heat is transferred unidirectionally from the aluminum plate to the solid heat storage body.

[0027] 5. The photovoltaic panels are laid at the same angle as the local latitude, which increases the direct sunlight exposure, improves the photovoltaic thermal efficiency, and increases the area of ​​the photovoltaic panels within a limited height.

[0028] 6. Photovoltaic panels and reflectors are arranged in a cross pattern, so that light shining on the reflectors can be reflected back to the photovoltaic panels, making full use of solar energy;

[0029] 7. Adding Fresnel lenses to the inside of the glass cover plate concentrates sunlight from a relatively large area to a relatively concentrated area, further improving the power generation efficiency of the photovoltaic panel. At the same time, installing Fresnel lenses can improve the strength of the glass cover plate.

[0030] 8. The insulation layer in the PVT thermal storage wall not only reduces heat loss, but also compensates for the thermal expansion and contraction of the PVT thermal storage wall.

[0031] 9. PVT thermal storage walls consist of two insulation layers, an air layer between the glass cover and the aluminum plate, and a solid thermal storage body, which improves the thermal insulation performance of the building envelope. When PVT thermal storage walls are arranged at the corners of the building's exterior walls, the adverse effects of cold bridges can be reduced.

[0032] 10. During cooling, the heat inside the building is effectively transferred to the PVT thermal storage wall, which serves as the heat source for the heat pump, thus realizing the effective utilization of building waste heat. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of a PVT thermal storage wall and energy supply system in a heating scenario.

[0034] Figure 2 This is a longitudinal section view of the PVT thermal storage wall.

[0035] Figure 3 This is the main view of the PVT thermal storage wall.

[0036] Figure 4This is a rear view of a PVT thermal storage wall in a heating scenario.

[0037] Figure 5 A schematic diagram showing the connection between the PVT thermal storage wall panel installed at the corner of the exterior wall and the heat pump.

[0038] Figure 6 Schematic diagram of PVT thermal storage wall and energy supply system in a cold / heat supply scenario;

[0039] Figure 7 Rear view of a PVT thermal storage wall in a cold / heat supply scenario.

[0040] In the diagram: 1-PVT thermal storage wall; 2-front insulation layer; 3-left insulation layer; 4-rear insulation layer; 5-right insulation layer; 6-upper insulation layer; 7-lower insulation layer; 8-reflective coating; 9-photovoltaic panel; 10-aluminum plate; 11-one-way heat pipe; 12-solid thermal storage body; 13-glass cover; 14-Fresnel lens; 15-heat pump evaporator coil; 16-heat pump; 17-compressor; 18-condenser; 19-hot water storage tank; 20-expansion valve; 21-hot water supply pipe; 22-makeup water pipe; 23-heating and cooling unit; 24-evaporator / condenser coil; 25-four-way reversing valve; 26-heat exchanger; 27-energy storage tank; 28-heating / chilled water supply pipe; 29-heating / chilled water return pipe. Detailed Implementation

[0041] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0042] Example 1

[0043] The following combination Figures 1-7 This describes a building energy supply system:

[0044] like Figure 1 As shown, a building energy supply system is characterized in that: the system consists of a PVT thermal storage wall 1 and a heat pump 16;

[0045] like Figures 2-4As shown, the PVT thermal storage wall 1 consists of a front insulation layer 2, a left insulation layer 3, a rear insulation layer 4, a right insulation layer 5, an upper insulation layer 6, a lower insulation layer 7, a reflective coating 8, photovoltaic panels 9, aluminum plates 10, unidirectional heat pipes 11, a solid thermal storage body 12, a glass cover plate 13, a Fresnel lens 14, and a heat pump evaporator coil 15. The aluminum plate 10 has a serrated longitudinal section with a serration angle twice the local latitude, and its outer surface is coated with a black selective coating. The photovoltaic panels 9 are pressurized and adhered to the front of the aluminum plate 10 at an acute angle to the ground plane, using ethylene-vinyl acetate copolymer (EVA) as the bonding and fixing material. The reflective coating 8 is sprayed on the front of the aluminum plate 10 at an obtuse angle to the ground plane, and the angle between the reflective coating 8 and the adjacent photovoltaic panel 9 below is no greater than 90°. The unidirectional heat pipe 11 is a flat, closed copper heat pipe. The evaporation section 11 is welded to the back of the aluminum plate 10. The condensation section of the unidirectional heat pipe 11 penetrates the solid heat storage body 12 at a slightly upward angle. The front insulation layer 2 is adhered to the back of the aluminum plate 10. The evaporation section of the unidirectional heat pipe 11 is tightly combined with the front insulation layer 2. The longitudinal section of the front insulation layer 2 is serrated. The front insulation layer 2, the left insulation layer 3, the rear insulation layer 4, the right insulation layer 5, the upper insulation layer 6, and the lower insulation layer 7 form a closed heat storage cavity, which is filled with the solid heat storage body 12. The glass cover plate 13 is made of tempered coated glass, and an air cavity is formed between the glass cover plate 13 and the aluminum plate 10. The Fresnel lens 14 is adhered to the inside of the glass cover plate 13 by using a silicone vacuum method. The heat pump evaporator coil 15 is made of copper and is arranged in a serpentine pattern in the solid heat storage body 12. The heat pump evaporator coil 15 is connected to the PVT heat storage wall 1 on the same side, with the bottom inlet and the top outlet.

[0046] The heat pump evaporator coil 15, compressor 17, condenser 18 and expansion valve 20 are connected in sequence through refrigerant pipelines to form a closed heat pump 16 circulation path; the condenser 18 is immersed in the hot water storage tank 19;

[0047] like Figure 5 As shown, the PVT heat storage wall 1 can be arranged on the edge of the building exterior wall, or it can be arranged in an L-shape at the corner of the building exterior wall. The heat pump 16 is placed on the ground or on the equipment mounting platform on the building exterior wall.

[0048] like Figure 6 and Figure 7 As shown, the PVT thermal storage wall 1 can be connected to the heat pump 16 on one side to supply domestic hot water all year round; the other side of the PVT thermal storage wall 1 is connected to the heating and cooling unit 23 through the evaporator / condenser coil 24 to provide heating in winter and cooling in summer.

[0049] The hot water side pipe of the hot water storage tank 19 in the heat pump 16 is connected to the hot water supply pipe 21 and the water replenishment pipe 22 respectively.

[0050] The heating and cooling unit 23 consists of an evaporator / condenser coil 24, a four-way reversing valve 25, a compressor 17, a heat exchanger 26, an energy storage tank 27, and an expansion valve 20. The evaporator / condenser coil 24, the four-way reversing valve 25, the heat exchanger 26, and the expansion valve 20 are connected in sequence through refrigerant pipelines to form a closed loop. The four-way reversing valve 25 realizes the switching between heating and cooling modes of the unit. The heat exchanger 26 is immersed in the energy storage tank 27, which is connected to the heating / cooling water supply pipe 28 and the heating / cooling water return pipe 29. The evaporator / condenser coil 24 is made of copper and is arranged in a serpentine pattern in the solid heat storage body 12. The evaporator / condenser coil 24 and the PVT heat storage wall 1 are connected in a bottom-in, top-out manner on the same side.

[0051] The following is in conjunction with the appendix Figures 1-7 This describes the working principle of a building energy supply system:

[0052] Example 2

[0053] like Figures 1-4 As shown, solar radiation can pass through the outer glass cover plate 13, be focused by the Fresnel lens 14 on the inner side of the glass cover plate 13 to the photovoltaic panel 9, and the reflective coating 8 reflects part of the light to the adjacent photovoltaic panel 9 below it, so that the photovoltaic panel 9 can realize photoelectric conversion; the evaporation section of the one-way heat pipe 11 absorbs the light and heat of the aluminum plate 10 and the photovoltaic panel 9, and the heat transfer medium in the one-way heat pipe 11 absorbs heat and evaporates and flows to the condensation section of the one-way heat pipe 11, transferring heat to the solid heat storage body 12 and condensing. The condensate in the condensation section of the one-way heat pipe 11 flows back to the evaporation section of the one-way heat pipe 11 by gravity;

[0054] In a heating scenario, the refrigerant in the heat pump evaporator coil 15 absorbs heat from the solid heat storage body 12 and evaporates. It is then pressurized by the compressor 17, heats the water in the hot water storage tank 19 through the condenser 18, and then returns to the heat pump evaporator coil 15 through the expansion valve 20 to achieve heating.

[0055] Example 3

[0056] like Figures 6-7As shown, in a cooling / heating supply scenario, heat pump 16 supplies domestic hot water year-round. In winter, the refrigerant in the evaporator / condenser coil 24 absorbs heat from the solid heat storage body 12, enters the compressor 17 in the cooling and heating unit 23 via the four-way reversing valve 25 for compression, and then enters the heat exchanger 26 to release heat to the water in the energy storage tank 27. The hot water in the energy storage tank 27 is used for heating / cooling water supply through the heating / cooling water supply pipe 28. In summer, the heating / cooling water return pipe 29 transfers heat from inside the building to the energy storage tank 27, and the heat exchanger 26... The refrigerant absorbs heat and evaporates, then enters the compressor 17 in the heating and cooling unit 23 through the four-way reversing valve 25 for compression, and then enters the evaporator / condenser coil 24 to transfer heat to the solid heat storage body 12. After passing through the expansion valve 20 in the heating and cooling unit 23, it returns to the heat exchanger 26 to absorb heat from the energy storage tank 27. The low-temperature water in the energy storage tank 27 supplies cooling to the interior of the building through the heating / cooling water supply pipe 28. The heat transferred from the interior of the building to the solid heat storage body 12 is supplied to the heat pump evaporator coil 15 of the heat pump 16.

[0057] This invention is applicable to new buildings or renovations of existing buildings in different climate zones.

[0058] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A building energy supply system, characterized in that: The system includes a PVT thermal storage wall (1) and a heat pump (16). The PVT thermal storage wall (1) includes a front insulation layer (2), a left insulation layer (3), a rear insulation layer (4), a right insulation layer (5), an upper insulation layer (6), a lower insulation layer (7), a reflective coating (8), a photovoltaic panel (9), an aluminum plate (10), a unidirectional heat pipe (11), a solid thermal storage body (12), a glass cover plate (13), a Fresnel lens (14), and a heat pump evaporator. The heat storage coil (15) is surrounded by the front insulation layer (2), left insulation layer (3), rear insulation layer (4), right insulation layer (5), upper insulation layer (6) and lower insulation layer (7) to form a closed heat storage cavity, which is filled with solid heat storage body (12). The front insulation layer (2) is adhered to the back of the aluminum plate (10). The photovoltaic panel (9) is pressurized and adhered to the front of the aluminum plate (10) at an acute angle with the ground plane. The reflective coating (8) is sprayed on the aluminum plate. On the front side of the plate (10) with an obtuse angle to the ground plane, the glass cover plate (13) is set on the outside of the aluminum plate (10) to form an air cavity. The Fresnel lens (14) is adhered to the inside of the glass cover plate (13) by a silicone vacuum method. The heat pump evaporator coil (15) is arranged in a serpentine pattern in the solid heat storage body (12). The heat pump evaporator coil (15) is connected to the compressor (17), condenser (18) and expansion valve (20) in sequence through refrigerant pipelines. The heat pump evaporator coil (15), compressor (17), condenser (18) and expansion valve (20) form a closed heat pump (16) circulation path. A hot water storage tank (19) is set outside the condenser (18). The condenser (18) is immersed in the hot water storage tank (19). The PVT heat storage wall (1) can be connected to the heat pump (16) on one side. The other side of the heat storage wall (1) is connected to an evaporator / condenser coil (24), and the other end of the evaporator / condenser coil (24) is connected to a heating and cooling unit (23). The hot water side pipe of the hot water storage tank (19) is connected to a hot water supply pipe (21) and a water replenishment pipe (22).

2. The building energy supply system according to claim 1, characterized in that, The heating and cooling unit (23) also includes a four-way reversing valve (25), a heat exchanger (26), and an energy storage tank (27); the evaporator / condenser coil (24), the four-way reversing valve (25), the heat exchanger (26), and the expansion valve (20) are connected in sequence through refrigerant pipelines to form a closed loop; the four-way reversing valve (25) realizes the switching between heating and cooling modes of the unit; the heat exchanger (26) is submerged in the energy storage tank (27), and the energy storage tank (27) is connected to the heating / cooling water supply pipe (28) and the heating / cooling water return pipe (29).

3. A building energy supply system according to claim 1, characterized in that, The aluminum plate (10) has a serrated longitudinal section with a serration angle twice that of the local latitude, and the outer surface of the aluminum plate (10) is coated with a black selective coating.

4. A building energy supply system according to claim 1, characterized in that, The heat pump evaporator coil (15) is made of copper, and the heat pump evaporator coil (15) is connected to the PVT heat storage wall (1) on the same side with the bottom inlet and the top outlet outlet.

5. A building energy supply system according to claim 1, characterized in that, The bonding and fixing material between the photovoltaic panel (9) and the aluminum plate (10) is ethylene-vinyl acetate copolymer (EVA).

6. A building energy supply system according to claim 1, characterized in that, The angle between the reflective coating (8) and the adjacent photovoltaic panel (9) on the lower side is no greater than 90°.

7. A building energy supply system according to claim 1, characterized in that, The unidirectional heat pipe (11) is a flat, closed copper heat pipe. The evaporation section of the unidirectional heat pipe (11) is welded to the back of the aluminum plate (10), and the condensation section of the unidirectional heat pipe (11) penetrates the solid heat storage body (12) at a slightly upward angle.

8. A building energy supply system according to claim 1, characterized in that, The evaporation section of the unidirectional heat pipe (11) is tightly integrated with the front insulation layer (2), and the longitudinal section of the front insulation layer (2) is serrated.

9. A building energy supply system according to claim 1, characterized in that, The glass cover (13) is made of tempered coated glass.

10. A building energy supply system according to claim 1, characterized in that, The PVT heat storage wall (1) can be arranged on the edge of the building exterior wall or in an L-shape at the corner of the building exterior wall. The heat pump (16) is placed on the ground or on the equipment installation platform on the building exterior wall.

11. A building energy supply system according to claim 1, characterized in that, The evaporator / condenser coil (24) is made of copper and is arranged in a serpentine pattern in the solid heat storage body (12). The evaporator / condenser coil (24) and the PVT heat storage wall (1) are connected in a bottom-in, top-out manner on the same side.

12. A building energy supply system according to claim 1, characterized in that, Solar radiation can pass through the outer glass cover plate (13), and be focused onto the photovoltaic panel (9) by the Fresnel lens (14) on the inner side of the glass cover plate (13). The reflective coating (8) reflects part of the light to the adjacent photovoltaic panel (9) below it, and the photovoltaic panel (9) realizes photoelectric conversion. The evaporation section of the one-way heat pipe (11) absorbs the light and heat of the aluminum plate (10) and the photovoltaic panel (9). After the heat transfer medium in the one-way heat pipe (11) absorbs heat and evaporates, it flows to the condensation section of the one-way heat pipe (11), transfers heat to the solid heat storage body (12) and condenses. The condensate in the condensation section of the one-way heat pipe (11) flows back to the evaporation section of the one-way heat pipe (11) by gravity.

13. A building energy supply system according to claim 1, characterized in that, In the heating scenario, the refrigerant in the heat pump evaporator coil (15) absorbs heat from the solid heat storage body (12) and evaporates. It is then pressurized by the compressor (17), and the water in the hot water storage tank (19) is heated by the condenser (18). Finally, it returns to the heat pump evaporator coil (15) through the expansion valve (20) to achieve heating.

14. A building energy supply system according to claim 1, characterized in that, In a cold / heat supply scenario, the heat pump (16) supplies domestic hot water year-round. In winter, the refrigerant in the evaporator / condenser coil (24) absorbs heat from the solid heat storage body (12), enters the compressor (17) in the heating and cooling unit (23) via the four-way reversing valve (25) for compression, and then enters the heat exchanger (26) to release heat to the water in the energy storage tank (27). The hot water in the energy storage tank (27) is used for heating through the heating / cooling water supply pipe (28). In summer, the heating / cooling water return pipe (29) transfers heat from inside the building to the energy storage tank (27), and the refrigerant in the heat exchanger (26) is used for heating. The refrigerant absorbs heat and evaporates, then enters the compressor (17) in the heating and cooling unit (23) through the four-way reversing valve (25) for compression, and then enters the evaporator / condenser coil (24) to transfer heat to the solid heat storage body (12). After passing through the expansion valve (20) in the heating and cooling unit (23), it returns to the heat exchanger (26) to absorb heat from the energy storage tank (27). The low-temperature water in the energy storage tank (27) supplies cooling to the interior of the building through the heating / cooling water supply pipe (28). The heat transferred from the interior of the building to the solid heat storage body (12) is supplied to the heat pump evaporator coil (15) of the heat pump (16).

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