Multi-source pvt heat pump coupling system with cross-season heat storage

Abstract

The application relates to the technical field of photoelectric and photo-thermal integration, and provides a multi-source PVT heat pump coupling system for cross-season heat storage. The system comprises a photovoltaic-thermal assembly, a heat storage water tank, a buried heat exchange device, a heat pump system, a first heat exchange device and a second heat exchange device. The first heat exchange device has a first heat exchange end and a second heat exchange end. The first heat exchange end is connected with a condenser for heat exchange. The second heat exchange end is connected with air for heat exchange. The second heat exchange device has a third heat exchange end and a fourth heat exchange end. The third heat exchange end is connected with the condenser for heat exchange. The fourth heat exchange end is connected with the buried heat exchange device or the heat storage water tank for heat exchange. The multi-source PVT heat pump coupling system for cross-season heat storage can supply power to users by using photovoltaic energy. When cooling is needed, the condenser and the first heat exchange device work. When heating is needed, the heat source is at least one of solar photovoltaic-thermal energy, air thermal energy and ground source thermal energy, so that stable output of the whole system can be ensured.

Description

Technical Field

[0001] This application relates to the field of optoelectronic and photothermal integration technology, and in particular to a multi-source PVT heat pump coupling system for cross-seasonal heat storage. Background Technology

[0002] Photovoltaic-thermal integration (PV / T) technology is a comprehensive renewable energy technology that combines photovoltaic power generation with solar thermal utilization. It aims to simultaneously achieve efficient electrical and thermal energy output from solar energy. PV / T systems integrate photovoltaic modules with heat collection devices, utilizing a cooling medium to absorb waste heat. This reduces the operating temperature of photovoltaic modules, improves power generation efficiency, and converts waste heat into usable thermal energy, thus achieving full-spectrum, cascaded utilization of solar energy. However, the power generation efficiency of photovoltaic cells (such as silicon-based modules) is affected by factors such as temperature and sunshine duration. Heat collection relies on solar radiation, and under low light conditions, heat pumps may not obtain sufficient heat, leading to reduced heating capacity and inability to meet user needs. This results in the system's dependence on the power grid or energy storage devices, leading to poor overall energy utilization and environmental adaptability. Utility Model Content

[0003] To solve the above-mentioned technical problems, or at least partially solve them, this application provides a multi-source PVT heat pump coupling system for cross-seasonal heat storage.

[0004] This application provides a multi-source PVT heat pump coupling system for cross-seasonal heat storage, including: Photovoltaic thermal modules are used to supply electricity to users using photovoltaic energy and to collect solar thermal energy. A hot water storage tank is connected to the photovoltaic thermal module to store hot water after absorbing the solar thermal energy; An underground heat exchange device is connected to the hot water storage tank; A heat pump system includes a condenser, on which a power supply pipeline is provided for supplying cooling or heating to users; The first heat exchange device has a first heat exchange end and a second heat exchange end, wherein the first heat exchange end is connected to the condenser for heat exchange, and the second heat exchange end is in contact with air for heat exchange. The second heat exchange device has a third heat exchange end and a fourth heat exchange end. The third heat exchange end is connected to the condenser for heat exchange, and the fourth heat exchange end is connected to the buried heat exchange device or the hot water storage tank for heat exchange.

[0005] Optionally, the fourth heat exchange end is connected to the buried heat exchange device or the hot water storage tank via a first three-way valve; The first three-way valve has a first opening, a second opening and a third opening. The first opening is connected to the fourth heat exchange end, the second opening is connected to the buried heat exchange device, and the third opening is connected to the hot water storage tank. The first three-way valve can switch between connecting the first opening and the second opening, or connecting the first opening and the third opening, or connecting the second opening and the third opening.

[0006] Optionally, the fourth heat exchange end has a first inlet and a first outlet, and the first three-way valve is provided at both the first inlet and the first outlet; A first temperature sensor is installed between the first three-way valve at the first inlet and the buried heat exchange device. A second temperature sensor is installed between the first three-way valve at the first outlet and the buried heat exchange device.

[0007] Optionally, a first circulating water pump is provided between the second opening and the buried heat exchange device.

[0008] Optionally, the condenser is connected to the first heat exchange end or the third heat exchange end via a second three-way valve; The second three-way valve has a fourth opening, a fifth opening, and a sixth opening. The fourth opening is connected to the condenser, the fifth opening is connected to the first heat exchange end, and the sixth opening is connected to the third heat exchange end. The second three-way valve can switch between connecting the fourth opening and the fifth opening, or connecting the fourth opening and the sixth opening.

[0009] Optionally, the condenser has a second inlet and a second outlet, and a second three-way valve is provided at both the second inlet and the second outlet.

[0010] Optionally, the power supply pipeline includes a first pipeline and a second pipeline; The first pipeline is connected to the second inlet, and a first solenoid valve is installed on the first pipeline; The second pipeline is connected to the second outlet, and a second solenoid valve is installed on the second pipeline.

[0011] Optionally, the heat pump system further includes a compressor and an expansion valve, the compressor being connected to the second inlet and the expansion valve being connected to the second outlet.

[0012] Optionally, the photovoltaic thermal module includes a photovoltaic cell module that converts solar energy into electrical energy, and a blown-type heat collector evaporator attached to the back of the photovoltaic cell module, wherein the blown-type heat collector evaporator is connected to the hot water storage tank via a hot water pipe.

[0013] Optionally, the hot water pipe includes an inlet pipe and an outlet pipe; A third solenoid valve is installed on the water inlet pipe, and a fourth solenoid valve is installed on the water outlet pipe. And / or, a third temperature sensor is installed on the water inlet pipe, and a fourth temperature sensor is installed on the water outlet pipe; And / or, a second circulating water pump is provided on the water inlet pipe or the water outlet pipe.

[0014] The technical solution provided in this application has the following advantages compared with the prior art: The multi-source PVT heat pump coupling system for cross-seasonal heat storage provided in this application connects a hot water storage tank to photovoltaic thermal modules to store hot water after absorbing solar thermal energy and to store excess heat from the photovoltaic thermal modules. A buried heat exchange device is connected to the hot water storage tank to transfer heat to the buried heat exchange device, thereby storing heat in the soil and achieving cross-seasonal heat storage. The condenser can directly supply cooling or heating to users through power supply pipelines. When cooling is needed, the condenser and the first heat exchange device operate; when heating is needed, energy can be supplied either through a circulation between the first heat exchange device and the condenser, or through a second heat exchange device. The condenser-to-condenser energy circulation system can utilize heat from the air, underground heat exchangers, or hot water storage tanks. Alternatively, it can combine at least two of the following: solar photovoltaic thermal energy, air thermal energy, and ground source thermal energy to achieve multi-source utilization. This enables the construction of an efficient combined cooling, heating, and power (CCHP) system. Under good sunlight conditions, photovoltaic thermal modules are used for solar thermal storage. When sunlight is insufficient, the first heat exchanger supplements the air thermal energy, or the underground heat exchanger provides direct heating. This ensures stable output of the entire system, meets users' comprehensive needs for heat and electricity, and is suitable for widespread application in various complex environments and operating conditions. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a multi-source PVT heat pump coupling system for cross-seasonal heat storage according to an embodiment of this application.

[0018] In the diagram: 1. Photovoltaic thermal module; 2. Hot water storage tank; 3. Buried heat exchange device; 4. Condenser; 5. First heat exchange device; 6. Second heat exchange device; 7. First three-way valve; 8. First temperature sensor; 9. Second temperature sensor; 10. First circulating water pump; 11. Second three-way valve; 12. First solenoid valve; 13. Second solenoid valve; 14. Compressor; 15. Expansion valve; 16. Third solenoid valve; 17. Fourth solenoid valve; 18. Third temperature sensor; 19. Fourth temperature sensor; 20. Second circulating water pump; 21. Photovoltaic controller; 22. Inverter; 23. Control module. Detailed Implementation

[0019] To better understand the above-mentioned objectives, features, and advantages of this application, the solution of this application will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of this application, but this application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of this application, and not all embodiments.

[0021] The following detailed description uses specific examples to illustrate this multi-source PVT heat pump coupling system for cross-seasonal heat storage: Reference Figure 1 As shown in some embodiments of this application, a multi-source PVT heat pump coupling system for cross-seasonal heat storage is provided, including a photovoltaic thermal module 1, a hot water storage tank 2, a buried heat exchange device 3, a heat pump system, a first heat exchange device 5, and a second heat exchange device 6.

[0022] The photovoltaic thermal module 1 is used to supply electricity to users and collect solar thermal energy using photovoltaic energy. The hot water storage tank 2 is connected to the photovoltaic thermal module 1 to store hot water after absorbing solar thermal energy and to store excess heat from the photovoltaic thermal module 1. The buried heat exchange device 3 is connected to the hot water storage tank 2 to transfer heat to the buried heat exchange device 3 through the hot water storage tank 2, thereby storing heat in the soil and realizing cross-seasonal heat storage.

[0023] The heat pump system includes a condenser 4 with a power supply pipeline for supplying cooling or heating to users. The first heat exchange device 5 has a first heat exchange end and a second heat exchange end. The first heat exchange end is connected to the condenser 4 for heat exchange, and the second heat exchange end is in contact with the air for heat exchange. When using the condenser 4 for cooling, heat is released into the air through the second heat exchange end, and when using the condenser 4 for heating, the heat source in the air can be used to meet the heating demand.

[0024] Furthermore, the second heat exchange device 6 has a third heat exchange end and a fourth heat exchange end. The third heat exchange end is connected to the condenser 4 for heat exchange, and the fourth heat exchange end is connected to the buried heat exchange device 3 or the hot water storage tank 2 for heat exchange. That is to say, the condenser 4 can directly supply cooling or heating to users through the power supply pipeline. When cooling is needed, the condenser 4 and the first heat exchange device 5 work; when heating is needed, energy can be supplied through circulation between the first heat exchange device 5 and the condenser 4, or through circulation between the second heat exchange device 6 and the condenser 4. The heat source can be thermal energy in the air, or the buried heat exchange device 3 or the hot water storage tank 2, or it can combine at least two of solar photovoltaic thermal energy, air thermal energy and ground source thermal energy to achieve multi-source utilization. In this way, an efficient combined cooling, heating and power mode can be constructed.

[0025] In practical use, when the lighting conditions are good, the photovoltaic thermal module 1 is used first for solar thermal storage. When the lighting conditions are insufficient, the first heat exchange device 5 is used to supplement the air heat energy, or the underground heat exchange device 3 is used directly for heating. This can ensure the stable output of the entire system, meet the user's comprehensive needs for heat and electricity, and is suitable for promotion and application in a variety of complex environments and working conditions.

[0026] In some embodiments, the fourth heat exchange end is connected to the buried heat exchange device 3 or the hot water storage tank 2 via a first three-way valve 7. The first three-way valve 7 has a first opening, a second opening and a third opening. The first opening is connected to the fourth heat exchange end, the second opening is connected to the buried heat exchange device 3, and the third opening is connected to the hot water storage tank 2. The first three-way valve 7 can switch between connecting the first opening and the second opening, or connecting the first opening and the third opening, or connecting the second opening and the third opening.

[0027] In other words, when the first three-way valve 7 connects the first opening and the second opening, the fourth heat exchange end can be connected to the buried heat exchange device 3, and heat can be provided to the fourth heat exchange end through the buried heat exchange device 3, so that the buried heat exchange device 3 can serve as a heat source to supply heat to users; when the first three-way valve 7 connects the first opening and the third opening, the fourth heat exchange end can be connected to the hot water storage tank 2, and heat can be provided to the fourth heat exchange end through the hot water storage tank 2, so that the hot water storage tank 2 can serve as a heat source to supply heat to users; when the first three-way valve 7 connects the second opening and the third opening, the buried heat exchange device 3 can be connected to the hot water storage tank 2. At this time, the hot water storage tank 2 and the buried heat exchange device 3 can store light and heat energy in the soil during the non-heating season, so that it can be used during the heating season.

[0028] In specific implementation, the fourth heat exchange end has a first inlet and a first outlet, and a first three-way valve 7 is provided at both the first inlet and the first outlet. That is, there are two first three-way valves 7, so that by controlling the opening and closing of the first three-way valves 7, a circulation loop can be formed between the hot water storage tank 2 and the buried heat exchange device 3, between the buried heat exchange device 3 and the second heat exchange device 6, and between the hot water storage tank 2 and the second heat exchange device 6.

[0029] A first temperature sensor 8 is installed between the first three-way valve 7 at the first inlet and the buried heat exchange device 3 to detect the temperature of the hot water entering the buried heat exchange device 3. A second temperature sensor 9 is installed between the first three-way valve 7 at the first outlet and the buried heat exchange device 3 to detect the temperature of the hot water coming out of the buried heat exchange device 3.

[0030] It is understandable that by setting up the first temperature sensor 8 and the second temperature sensor 9, the buried heat exchange device 3 can be intelligently controlled to adjust different modes according to the actual scenario to meet different needs.

[0031] Reference Figure 1 As shown, a first circulating water pump 10 is installed between the second opening and the buried heat exchange device 3 to facilitate the circulation of hot water between the buried heat exchange device 3 and the second heat exchange device 6, thereby improving efficiency.

[0032] In some embodiments, the condenser 4 is connected to the first heat exchange end or the third heat exchange end via a second three-way valve 11. The second three-way valve 11 has a fourth opening, a fifth opening and a sixth opening. The fourth opening is connected to the condenser 4, the fifth opening is connected to the first heat exchange end, and the sixth opening is connected to the third heat exchange end. The second three-way valve 11 can switch between connecting the fourth opening and the fifth opening, or connecting the fourth opening and the sixth opening.

[0033] In other words, when the second three-way valve 11 connects the fourth and sixth openings, the condenser 4 and the first heat exchange device 5 can be connected, and a circulation of heat or cold can be formed between the condenser 4 and the first heat exchange device 5, so that the air can exchange heat with the heat pump system; when the second three-way valve 11 connects the fourth and sixth openings, the condenser 4 and the second heat exchange device 6 can be connected, and heat can be provided to the second heat exchange device 6 through the hot water storage tank 2 or the buried heat exchange device 3, so that a circulation of heat can be formed between the second heat exchange device 6 and the condenser 4 to provide heat to the user.

[0034] In specific implementation, the condenser 4 has a second inlet and a second outlet, and a second three-way valve 11 is provided at both the second inlet and the second outlet. That is, there are two second three-way valves 11, so that a circulation loop can be formed between the condenser 4 and the first heat exchange device 5, and between the condenser 4 and the second heat exchange device 6 by controlling the opening and closing of the second three-way valves 11.

[0035] In some embodiments, the power supply pipeline includes a first pipeline and a second pipeline. The first pipeline is connected to a second inlet, and a first solenoid valve 12 is installed on the first pipeline. The second pipeline is connected to a second outlet, and a second solenoid valve 13 is installed on the second pipeline. It is understood that the first pipeline and the second pipeline are respectively connected to the high-temperature end and the low-temperature end of the condenser 4. For example, when the first pipeline is connected to the low-temperature end and the second pipeline is connected to the high-temperature end, cooling can be achieved when the first solenoid valve 12 is open and the second solenoid valve 13 is closed, or heating can be achieved when the first solenoid valve 12 is closed and the second solenoid valve 13 is open. Of course, the first pipeline can also be connected to the high-temperature end and the second pipeline to the low-temperature end; this application does not limit this and the specific configuration can be determined according to actual needs.

[0036] In some embodiments, the heat pump system further includes a compressor 14 and an expansion valve 15. The compressor 14 is connected to a second inlet, and the expansion valve 15 is connected to a second outlet. Specifically, refrigerant flows between the compressor 14, the condenser 4, the expansion valve 15, and the first heat exchange device 5 or the second heat exchange device 6. The heat generated by the photovoltaic thermal module 1 is absorbed by the antifreeze working fluid in the blown-type evaporator behind it. After absorbing heat, the antifreeze working fluid exchanges heat through the first heat exchange device 5. The refrigerant in the heat pump system absorbs heat and forms refrigerant vapor. The refrigerant vapor is drawn into the compressor 14, pressurized and heated by the compressor 14 to become refrigerant superheated vapor. The refrigerant superheated vapor passes through the compressor 14 outlet to the condenser 4, where it exchanges heat with water or other media to become high-pressure subcooled refrigerant liquid. The high-pressure subcooled refrigerant liquid is depressurized by the expansion valve 15 and re-enters the first heat exchange device 5 to absorb heat and become refrigerant superheated vapor, thus achieving circulation.

[0037] Specifically, compressor 14 is a DC inverter compressor, which can adjust system performance by adjusting the compression ratio and flow rate.

[0038] In some embodiments, the photovoltaic thermal module 1 includes a photovoltaic cell module that converts solar energy into electrical energy, and a blown-type evaporator attached to the back of the photovoltaic cell module. The blown-type evaporator is connected to a hot water storage tank 2 via a hot water pipe. It is understood that the blown-type evaporator can cool the photovoltaic cell module, thereby ensuring its power generation efficiency, preventing overheating of the operating environment, and extending its service life. The antifreeze medium can be water, and the heated water can be stored in the hot water storage tank 2.

[0039] Specifically, the photovoltaic module also includes a photovoltaic controller 21 and an inverter 22, which are used to adjust the power output of the photovoltaic module so that it always operates at the maximum power point to improve energy utilization. The inverter 22 can convert DC power into AC power and transmit it to the grid through the AC power output terminal.

[0040] It should be noted that the photovoltaic controller 21 optimizes the photovoltaic output and initially adjusts the voltage to an intermediate stable value to supply the electrical components in the system. That is, the output DC power is transformed and directly supplies power to the electrical components (such as compressor 14, first circulating water pump 10 and second circulating water pump 20).

[0041] In some embodiments, the hot water pipe includes an inlet pipe and an outlet pipe. A third solenoid valve 16 is provided on the inlet pipe, and a fourth solenoid valve 17 is provided on the outlet pipe to control the flow rate and velocity of the hot water entering and leaving the hot water storage tank 2.

[0042] A third temperature sensor 18 is installed on the inlet pipe to detect the temperature of the hot water entering the hot water storage tank 2, and a fourth temperature sensor 19 is installed on the outlet pipe to detect the temperature of the hot water coming out of the hot water storage tank 2.

[0043] A second circulating water pump 20 is installed on the inlet or outlet water pipe to facilitate rapid circulation of the antifreeze working fluid between the blown-type evaporator and the hot water storage tank 2, thereby improving the heat dissipation effect.

[0044] In some embodiments, the multi-source PVT heat pump coupling system for cross-seasonal heat storage of this application further includes a control module 23, which may be connected to an irradiator and an ambient temperature sensor to monitor environmental conditions.

[0045] Specifically, the control module 23 receives signals from the first temperature sensor 8, the second temperature sensor 9, the third temperature sensor 18, and the fourth temperature sensor 19 in real time, and can dynamically adjust the opening degree of the expansion valve 15, the speed of the compressor 14, and the start and stop of the second heat exchange device 6. Furthermore, the control module 23 can also monitor the temperature and heat exchange status in the hot water storage tank 2 and the buried heat exchange device in real time, and dynamically adjust them according to the heat load demand.

[0046] By setting up an irradiation meter, temperature sensor, and control module 23, and by acquiring real-time signals from various sensors in the environment and system, the operating mode of this multi-source PVT heat pump coupling system for cross-seasonal heat storage can be dynamically adjusted to meet the user's comprehensive needs for thermal and electrical energy. It is suitable for promotion and application in various complex environments and working conditions.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0048] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to these embodiments, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-source PVT heat pump coupled system for cross-seasonal thermal storage, characterized in that, include: Photovoltaic thermal module (1), used to supply electricity to users and collect solar thermal energy using photovoltaic energy; A hot water storage tank (2) is connected to the photovoltaic thermal module (1) to store hot water after absorbing the solar thermal energy; The buried heat exchange device (3) is connected to the hot water storage tank (2); A heat pump system includes a condenser (4), on which a power supply pipeline is provided for supplying cooling or heating to users; The first heat exchange device (5) has a first heat exchange end and a second heat exchange end. The first heat exchange end is connected to the condenser (4) for heat exchange, and the second heat exchange end is in contact with the air for heat exchange. The second heat exchange device (6) has a third heat exchange end and a fourth heat exchange end. The third heat exchange end is connected to the condenser (4) for heat exchange, and the fourth heat exchange end is connected to the buried heat exchange device (3) or the hot water storage tank (2) for heat exchange.

2. The multi-source PVT heat pump coupled system with cross-seasonal heat storage of claim 1, wherein, The fourth heat exchange end is connected to the buried heat exchange device (3) or the hot water storage tank (2) through the first three-way valve (7); The first three-way valve (7) has a first opening, a second opening and a third opening. The first opening is connected to the fourth heat exchange end, the second opening is connected to the buried heat exchange device (3), and the third opening is connected to the hot water storage tank (2). The first three-way valve (7) can switch between connecting the first opening and the second opening, or connecting the first opening and the third opening, or connecting the second opening and the third opening.

3. The multi-source PVT heat pump coupled system with cross-seasonal heat storage of claim 2, wherein, The fourth heat exchange end has a first inlet and a first outlet, and the first three-way valve (7) is provided at both the first inlet and the first outlet. A first temperature sensor (8) is provided between the first three-way valve (7) at the first inlet and the buried heat exchange device (3); A second temperature sensor (9) is provided between the first three-way valve (7) at the first outlet and the buried heat exchange device (3).

4. The multi-source PVT heat pump coupled system with cross-seasonal heat storage of claim 2, wherein, A first circulating water pump (10) is provided between the second opening and the buried heat exchange device (3).

5. The multi-source PVT heat pump coupled system with cross-seasonal heat storage of claim 1, wherein, The condenser (4) is connected to the first heat exchange end or the third heat exchange end via a second three-way valve (11); The second three-way valve (11) has a fourth opening, a fifth opening and a sixth opening. The fourth opening is connected to the condenser (4), the fifth opening is connected to the first heat exchange end, and the sixth opening is connected to the third heat exchange end. The second three-way valve (11) can switch between connecting the fourth opening and the fifth opening, or connecting the fourth opening and the sixth opening.

6. The multi-source PVT heat pump coupled system with cross-seasonal heat storage of claim 5, wherein, The condenser (4) has a second inlet and a second outlet, and a second three-way valve (11) is provided at both the second inlet and the second outlet.

7. The multi-source PVT heat pump coupled system with cross-seasonal heat storage of claim 6, wherein, The power supply pipeline includes a first pipeline and a second pipeline; The first pipeline is connected to the second inlet, and a first solenoid valve (12) is installed on the first pipeline. The second pipeline is connected to the second outlet, and a second solenoid valve (13) is installed on the second pipeline.

8. The multi-source PVT heat pump coupled system with cross-seasonal heat storage of claim 6, wherein, The heat pump system also includes a compressor (14) and an expansion valve (15), the compressor (14) being connected to the second inlet and the expansion valve (15) being connected to the second outlet.

9. The multi-source PVT heat pump coupled system with cross-seasonal heat storage of claim 1, wherein, The photovoltaic thermal module (1) includes a photovoltaic cell module that converts solar energy into electrical energy, and a blown-type heat collector evaporator attached to the back of the photovoltaic cell module. The blown-type heat collector evaporator is connected to the hot water storage tank (2) through a hot water pipe.

10. The multi-source PVT heat pump coupling system for cross-seasonal heat storage according to claim 9, characterized in that, The hot water pipe includes an inlet pipe and an outlet pipe; A third solenoid valve (16) is installed on the water inlet pipe, and a fourth solenoid valve (17) is installed on the water outlet pipe. And / or, a third temperature sensor (18) is provided on the water inlet pipe, and a fourth temperature sensor (19) is provided on the water outlet pipe. And / or, a second circulating water pump (20) is provided on the water inlet pipe or the water outlet pipe.

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