Solar PV / T heat pump heat, power and cold three-storage combined supply system

Abstract

The invention relates to a solar PV / T heat pump heat, power and cold three-storage combined supply system, which belongs to the technical field of energy utilization and energy conservation and comprises a PV and PV / T assembly array, a storage module, a geothermal energy module, a domestic hot water heat pump unit and a cooling and heating air conditioner heat pump unit which are connected with one another, seven operation modes including a PV / T heat pump heating mode, a PV / T heat pump cooling mode, a PV / T heat pump domestic hot water making mode, a PV / T buried pipe heat supplementing mode, a soil source heat pump heating mode, a soil source heat pump cooling mode and a soil source heat pump domestic hot water making mode are provided by opening and closing different valve groups among the modules. The invention relates to a cooling, heating and power three-storage combined supply energy system of a photovoltaic and photo-thermal integrated coupling ground source heat pump technology, which can realize refrigeration in summer, heating in winter, hot water supply and power supply all year round, and solve the problem of soil heat imbalance caused by a ground source heat pump, thereby improving the comprehensive utilization efficiency of energy.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy utilization and energy conservation, and in particular relates to a solar PV / T heat pump heat, electricity and cooling three-storage combined supply system, and a cooling, heating, electricity and cooling three-storage combined supply energy system using photovoltaic and thermal integration coupled with ground-source heat pump technology. Background Art

[0002] As energy crisis and environmental problems become increasingly serious, finding clean, efficient and renewable energy has become an important issue. Solar energy, as a clean and pollution-free energy source, is increasingly widely used. However, as a single energy supply device, the use of solar energy is limited by the instability and discontinuity of solar radiation, and is severely affected by seasonal climate, resulting in low energy efficiency. As a year-round renewable energy system, ground source heat pumps can provide cooling in summer, heating in the heating season, and hot water throughout the year, but long-term operation will cause soil thermal imbalance. Therefore, a new energy system is urgently needed. Summary of the invention

[0003] In view of the shortcomings of the prior art, the present invention provides a solar PV / T heat pump heat, electricity and cooling three-storage combined supply system, which is a photovoltaic and thermal integrated coupled ground source heat pump technology cooling, heat and electricity three-storage combined supply energy system, which can achieve summer cooling, winter heating, year-round hot water supply and electricity supply, solve the soil thermal imbalance problem caused by ground source heat pumps, and thus improve the comprehensive utilization efficiency of energy.

[0004] A solar PV / T heat pump heat, electricity and cooling three-storage combined supply system comprises a connected PV and PV / T component array, a storage module, a geothermal energy module, a domestic hot water heat pump unit (5) and a heating and cooling air conditioning heat pump unit (8). Seven operation modes are provided by opening and closing different valve groups between the modules, namely, a PV / T heat pump heating mode, a PV / T heat pump cooling mode, a PV / T heat pump domestic hot water mode, a PV / T buried pipe heating mode, a soil source heat pump heating mode, a soil source heat pump cooling mode and a soil source heat pump domestic hot water mode.

[0005] The PV and PV / T component arrays include a PV array (2) and a PV / T component array (1), wherein the PV array (2) and the PV / T component array (1) are electrically connected to a photoelectric controller (10), a photovoltaic inverter (11), and an AC box (12) in sequence to form a power generation system; wherein the photoelectric controller (10) is connected to a storage battery (13), and the electricity generated by the PV (2) and the PV / T (1) enters the photoelectric controller (10), the photovoltaic inverter (11), and the AC box (12) in sequence, and the power grid and the power generation system are connected in parallel for supplementation.

[0006] The inlet and outlet of the direct heating side of the PV / T component array (1) are connected in sequence to the plate heat exchanger (3), the first valve group (21), the first water pump (16), the third valve group (23), the sixth valve group (26), and the cooling and heating air conditioning heat pump unit (8); the cooling and heating air conditioning heat pump unit (8) is connected to the user end (9) via a return water pump (20).

[0007] The cooling medium in the PV / T component array (1) is a refrigerant, the refrigerant outlet of the PV / T component array (1) is connected to a compressor (14), and the refrigerant inlet is connected to an expansion valve (15), and then the compressor (14) and the expansion valve (15) are connected in series through a plate heat exchanger (3) to form a closed system.

[0008] The storage module comprises a cold water storage tank (6), the inlet of the cold water storage tank (6) being connected to the cold and warm air conditioning heat pump unit (8) via a fourth valve group (24), and the outlet of the cold water storage tank (6) being connected to the user end (9) via a third water pump (19); and further comprises a hot water storage tank (4), the inlet of the hot water storage tank (4) being connected to the first water pump (16) and the first valve group (21) in sequence via a second valve group (22), and the outlet of the hot water storage tank (4) being connected to the first check valve (27) and the second check valve (28) respectively via a second water pump (17).

[0009] The geothermal energy module comprises a buried pipe (7), the inlet and outlet of the buried pipe (7) are connected to a fourth water pump (18) and a sixth valve group (26) via a fifth valve group (25), and the sixth valve group (26) is connected to a cooling and heating air conditioning heat pump unit (8).

[0010] The cooling and heating air conditioning heat pump unit (8) is connected to the cooling and heating source end and the user end respectively; the cooling side inlet of the cold storage water tank (6) is connected to the fourth valve group (24), and the cooling side outlet of the cold storage water tank (6) is connected to the third water pump (19).

[0011] The inlet of the domestic hot water heat pump unit (5) is connected to the first one-way valve (27), the second water pump (17), and the hot water storage tank (4) in sequence, and the outlet is connected to the third one-way valve (29) and the user end (9) in sequence.

[0012] The cooling and heating air conditioning heat pump unit (8), the domestic hot water heat pump unit (5), the first water pump (16), the second water pump (17), the third water pump (19), the fourth water pump (18), and the return water pump (20) are connected in parallel with the AC box (12) and the power grid; the electricity generated by the PV and PV / T component arrays is collected together and sent to the photoelectric controller (10) in the system, and the generated electricity is preferentially supplied to the cooling and heating air conditioning heat pump unit (8), the domestic hot water heat pump unit (5), the compressor (14), the first water pump (16), the second water pump (17), the third water pump (19), the fourth water pump (18), and the return water pump (20); when the electricity generated is sufficient, the electricity is stored in the storage battery (13) for backup; when the electricity generated is insufficient, the electricity in the storage battery (13) is preferentially used; if the electricity in the storage battery (13) is also insufficient, the power grid is used for supplement.

[0013] The operating modes provided by the system are as follows:

[0014] PV / T heat pump heating mode: when the temperature absorbed by the refrigerant in the back plate flow channel of the PV / T component array (1) reaches a temperature that can be directly used for heating, the first valve group (21), the first water pump (16), the third valve group (23), the sixth valve group (26), the cooling and heating air conditioning heat pump unit (8), the user end (9), and the return water pump (20) are opened to provide heating to the user end;

[0015] PV / T heat pump cooling mode: This mode is carried out at night. The PV / T component array (1) causes the refrigerant to absorb cold energy by radiating to the sky at night, and transfers the cold energy of the refrigerant to the cooling and heating air conditioning heat pump unit (8). The temperature is further reduced by using the nighttime electricity valley price and stored in the cold storage water tank (6). At night, the first valve group (21), the first water pump (16), the third valve group (23), the sixth valve group (26), the cooling and heating air conditioning heat pump unit (8), the fourth valve group (24), and the cold storage water tank (6) are opened.

[0016] The principle of cooling during the day is: first, use the cold energy in the cold storage tank to provide cooling for users. When the cold energy is exhausted or cannot meet the supply, use the ground source heat pump to provide cooling;

[0017] PV / T heat pump domestic hot water mode: when the PV / T component array (1) has no heating demand, the first valve group (21), the first water pump (16), the second valve group (22), the hot water storage tank (4), and the second water pump (17) are opened. At this time, when the water temperature output from the second water pump (17) reaches the preset hot water demand, the second check valve (28) is opened to directly supply the water to the user end (9); if the water temperature output from the second water pump (17) does not reach the use demand, the first check valve (27), the hot water heat pump unit (5), and the third check valve (29) are opened to supply the water to the user end (9);

[0018] PV / T underground pipe heating supplement mode: when PV / T heating is not required and the underground pipe needs heating supplement, this mode is operated, and the first valve group (21), the first water pump (16), the third valve group (23), the fifth valve group (25), the underground pipe (7), and the fourth water pump (18) are turned on;

[0019] Ground source heat pump heating mode and ground source heat pump cooling mode: open the fifth valve group (25), the fourth water pump (18), the sixth valve group (26), the heating and cooling air conditioning heat pump unit (8), the user end (9), and the return water pump (20);

[0020] In the domestic hot water production mode of the ground source heat pump, the fifth valve group (25), the fourth water pump (18), the third valve group (23), the second valve group (22), the heat storage tank (4), and the second water pump (17) are opened. At this time, when the water temperature output from the second water pump (17) reaches the hot water supply demand, the second check valve (28) is opened to directly supply the water to the user end (9); if the water temperature output from the second water pump (17) does not reach the use demand, the first check valve (27), the hot water heat pump unit (5), and the third check valve (29) are opened to supply the water to the user end (9).

[0021] The beneficial effects of the present invention are as follows: the solar PV / T heat pump heat, electricity and cooling three-storage combined supply system provided by the present invention provides 7 operating modes and can be flexibly adjusted according to changes in the external environment and terminal needs.

[0022] The present invention effectively alleviates the problem of insufficient power generation of the PV / T heat pump system by introducing PV arrays and batteries.

[0023] The setting of cold water storage tank and hot water storage tank enables the heat and cold generated by PV / T components to be fully collected and utilized.

[0024] The system uses PV / T module arrays to heat the soil, thereby alleviating the soil thermal imbalance caused by ground-source heat pumps. By integrating solar energy, geothermal energy, electrical energy and air energy, the system provides cooling in summer, heating in winter, and hot water and electricity throughout the year. In the context of the era of carbon neutrality, this solution demonstrates its feasibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the solar PV / T heat pump heat, electricity, cooling, and energy storage system provided by the present invention;

[0026] Figure 2 This is a schematic diagram of the power supply principle of the power grid in the present invention;

[0027] Figure 3 This is a schematic diagram of the solar PV / T heat pump heating operation mode in the present invention (the black solid line in the figure is the operation line);

[0028] Figure 4 This is a schematic diagram of the solar PV / T heat pump cooling operation mode in the present invention (the black solid line in the figure is the operation line);

[0029] Figure 5 This is a schematic diagram of the solar PV / T heat pump hot water supply operation mode in the present invention (the black solid line in the figure is the operation line);

[0030] Figure 6 This is a schematic diagram of the solar PV / T heat pump underground pipe heating operation mode in the present invention (the black solid line in the figure is the operation line);

[0031] Figure 7 The ground source heat pump heating operation mode and heating operation mode principle diagram in the present invention (the black solid line in the figure is the operation line);

[0032] Figure 8 This is a schematic diagram of the operation mode of the soil source heat pump for hot water production in the present invention (the black solid line in the figure is the operation line);

[0033] in,

[0034] 1-PV / T component array, 2-PV array, 3-plate heat exchanger, 4-hot water storage tank, 5-domestic hot water heat pump unit, 6-cold water storage tank, 7-underground pipe, 8-cooling and heating air conditioning heat pump unit, 9-user end, 10-photoelectric controller, 11-photovoltaic inverter, 12-AC box, 13-battery, 14-compressor, 15-expansion valve, 16-first water pump, 17-second water pump, 18-fourth water pump, 19-third water pump, 20-return water pump, 21-first valve group, 22-second valve group, 23-third valve group, 24-fourth valve group, 25-fifth valve group, 26-sixth valve group, 27-first check valve, 28-second check valve, 29-third check valve. DETAILED DESCRIPTION

[0035] In order to better explain the present invention and facilitate understanding, the technical solutions and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0036] like Figure 1-8 As shown, a solar PV / T heat pump heat, electricity and cooling three-storage combined supply system includes PV and PV / T component arrays, storage modules, geothermal energy modules, domestic hot water heat pump units 5 and heating and cooling air conditioning heat pump units 8, providing seven operating modes: PV / T heat pump heating mode, PV / T heat pump cooling mode, PV / T heat pump domestic hot water mode, PV / T buried pipe heating mode, soil source heat pump heating mode, soil source heat pump cooling mode, and soil source heat pump domestic hot water mode.

[0037] The PV and PV / T component arrays include a PV array 2 and a PV / T component array 1, which are electrically connected to a photoelectric controller 10, a photovoltaic inverter 11, and an AC box 12 in sequence to form a power generation system; wherein the photoelectric controller 10 is connected to a battery 13, and the electricity generated by PV2 and PV / T1 enters the photoelectric controller 10, the photovoltaic inverter 11, and the AC box 12 in sequence, and the power grid and the power generation system are connected in parallel for supplementation.

[0038] The inlet and outlet of the direct heating side of the PV / T component array 1 are connected to the plate heat exchanger 3, the first valve group 21, the first water pump 16, the third valve group 23, the sixth valve group 26, and the heating and cooling air conditioning heat pump unit 8 in sequence, and the heating and cooling air conditioning heat pump unit 8 is connected to the user end 9 through the return water pump 20.

[0039] The cooling medium in the PV / T component array 1 is a refrigerant, the refrigerant outlet of the PV / T component array 1 is connected to the compressor 14, and the refrigerant inlet is connected to the expansion valve 15, and then a closed system is formed through the plate heat exchanger 3, the compressor 14 and the expansion valve 15.

[0040] The storage module includes a cold water storage tank 6, the inlet of which is connected to the cold and warm air conditioning heat pump unit 8 through the fourth valve group 24, and the outlet of which is connected to the user end 9 through the third water pump 19. It also includes a hot water storage tank 4, the inlet of which is connected to the first water pump 16 and the first valve group 21 in sequence through the second valve group 22, and the outlet of which is connected to the first check valve 27 and the second check valve 28 respectively through the second water pump 17.

[0041] The geothermal energy module includes a buried pipe 7, and the inlet and outlet of the buried pipe 7 are connected to the fourth water pump 18 and the sixth valve group 26 through the fifth valve group 25. The cooling side inlet of the buried pipe 7 is connected to the fifth valve group 25, the fourth water pump 18, the sixth valve group 26, and the cooling and heating air conditioning heat pump unit 8; the heating side inlet and outlet of the buried pipe 7 are connected to the fifth valve group 25, the fourth water pump 18, the sixth valve group 26, and the cooling and heating air conditioning heat pump unit 8.

[0042] The cooling and heating air conditioning heat pump unit 8 is connected to the cooling and heating source end and the user end 9 respectively.

[0043] The cooling side inlet of the cold storage water tank 6 is connected to the fourth valve group 24 , and the cooling side outlet of the cold storage water tank 6 is connected to the third water pump 19 .

[0044] The inlet of the domestic hot water heat pump unit 5 is connected to the first one-way valve 27, the second water pump 17, and the hot water storage tank 4 in sequence, and the outlet is connected to the third one-way valve 29 and the user end 9 in sequence.

[0045] The cooling and heating air conditioning heat pump unit 8, the domestic hot water heat pump unit 5, the first water pump 16, the second water pump 17, the third water pump 19, the fourth water pump 18, and the return water pump 20 are connected in parallel with the AC box 12 and the power grid.

[0046] The electricity generated by the PV and PV / T component arrays will be collected together to the photoelectric controller 10 in the system. The photoelectric controller 10 is connected to the photovoltaic inverter 11 and the AC box 12. The generated electricity is preferentially supplied to the cooling and heating air conditioning heat pump unit 8, the domestic hot water heat pump unit 5, the compressor 14, the first water pump 16, the second water pump 17, the third water pump 19, the fourth water pump 18, and the return water pump 20. When the electricity generation is sufficient, the electricity is stored in the battery 13 for backup. When the electricity generation is insufficient, the electricity in the battery 13 is preferentially used. If the electricity in the battery 13 is also insufficient, the power grid is used for supplement.

[0047] The above-mentioned solar PV / T heat pump heat, electricity and cooling combined supply system constructs 7 operating modes through flexible adjustment of internal valves according to changes in the external environment and terminal demand, namely: PV / T heat pump heating mode, PV / T heat pump cooling mode, PV / T heat pump domestic hot water mode, PV / T buried pipe heating mode, soil source heat pump heating mode, soil source heat pump cooling mode, and soil source heat pump domestic hot water mode.

[0048] PV / T heat pump heating mode: When the temperature absorbed by the refrigerant in the back plate flow channel of the PV / T component array 1 reaches a temperature that can be directly used for heating, the first valve group 21, the first water pump 16, the third valve group 23, the sixth valve group 26, the cooling and heating air-conditioning heat pump unit 8, the user end 9, and the return water pump 20 are opened to provide heating to the user end 9.

[0049] PV / T heat pump cooling mode: This mode is performed at night. The PV / T component array 1 absorbs cold energy through radiation to the sky at night, transfers the cold energy of the refrigerant to the cooling and heating air conditioning heat pump unit 8, and uses the nighttime electricity valley price to further reduce the temperature and store it in the cold storage water tank 6. At night, the first valve group 21, the first water pump 16, the third valve group 23, the sixth valve group 26, the cooling and heating air conditioning heat pump unit 8, the fourth valve group 24, and the cold storage water tank 6 are opened.

[0050] The principle of cooling during the day is: first, the cold energy in the cold storage water tank 6 is used to provide cooling for users. After the cold energy is exhausted or the cold energy cannot meet the supply, the ground source heat pump is used for cooling.

[0051] PV / T heat pump domestic hot water mode: When the PV / T component array 1 has no heating demand, the first valve group 21, the first water pump 16, the second valve group 22, the hot water storage tank 4, and the second water pump 17 are opened. At this time, when the water temperature output from the second water pump 17 reaches the preset hot water demand, the second check valve 28 is opened and directly supplied to the user end 9. If the water temperature output from the second water pump 17 does not meet the use demand, the first check valve 27, the hot water heat pump unit 5, and the third check valve 29 are opened and supplied to the user end 9.

[0052] PV / T underground pipe heating supplement mode: In this mode, the first valve group 21, the first water pump 16, the third valve group 23, the fifth valve group 25, the underground pipe 7, and the fourth water pump 18 are turned on.

[0053] Ground source heat pump heating mode and ground source heat pump cooling mode: open the fifth valve group 25, the fourth water pump 18, the sixth valve group 26, the heating and cooling air conditioning heat pump unit 8, the user end 9, and the return water pump 20.

[0054] Soil source heat pump domestic hot water mode: open the fifth valve group 25, the fourth water pump 18, the third valve group 23, the second valve group 22, the heat storage tank 4, and the second water pump 17. At this time, when the water temperature output from the second water pump 17 meets the hot water supply demand, open the second one-way valve 28 and supply it directly to the user end 9; if the water temperature output from the second water pump 17 does not meet the use demand, open the first one-way valve 27, the hot water heat pump unit 5, and the third one-way valve 29 to supply it to the user end 9.

[0055] In the system provided by the present invention, the PV array 2 is added to neutralize the economic inconvenience caused by the PV / T component array 1, while maintaining the power generation of the system. The 7 modes provided by the system can be switched by starting and stopping the valve group according to the different seasons, climate, user needs, and soil temperature conditions to achieve cooling in summer, heating in winter, and hot water and power supply throughout the year.

Claims

1. A solar PV / T heat pump heat, electricity, cooling and storage combined supply system, Features: The system comprises a connected PV and PV / T component array, a storage module, a geothermal energy module, a domestic hot water heat pump unit (5) and a heating and cooling air conditioning heat pump unit (8), and provides seven operation modes through the opening and closing of different valve groups between the modules, namely, a PV / T heat pump heating mode, a PV / T heat pump cooling mode, a PV / T heat pump domestic hot water mode, a PV / T buried pipe heating mode, a soil source heat pump heating mode, a soil source heat pump cooling mode, and a soil source heat pump domestic hot water mode.

2. A solar PV / T heat pump heat, electricity, cooling, and energy storage system according to claim 1, Features: The PV and PV / T component arrays include a PV array (2) and a PV / T component array (1), wherein the PV array (2) and the PV / T component array (1) are electrically connected to a photoelectric controller (10), a photovoltaic inverter (11), and an AC box (12) in sequence to form a power generation system; wherein the photoelectric controller (10) is connected to a storage battery (13), and the electricity generated by the PV (2) and the PV / T (1) enters the photoelectric controller (10), the photovoltaic inverter (11), and the AC box (12) in sequence, and the power grid and the power generation system are connected in parallel for supplementation.

3. A solar PV / T heat pump heat, electricity, cooling, and energy storage system according to claim 2, Features: The inlet and outlet of the direct heating side of the PV / T component array (1) are connected in sequence to the plate heat exchanger (3), the first valve group (21), the first water pump (16), the third valve group (23), the sixth valve group (26), and the cooling and heating air conditioning heat pump unit (8); the cooling and heating air conditioning heat pump unit (8) is connected to the user end (9) via a return water pump (20).

4. A solar PV / T heat pump heat, electricity, cooling, and energy storage system according to claim 3, Features: The cooling medium in the PV / T component array (1) is a refrigerant, the refrigerant outlet of the PV / T component array (1) is connected to a compressor (14), and the refrigerant inlet is connected to an expansion valve (15), and then the compressor (14) and the expansion valve (15) are connected in series through a plate heat exchanger (3) to form a closed system.

5. A solar PV / T heat pump heat, electricity, cooling, and energy storage system according to claim 4, Features: The storage module comprises a cold water storage tank (6), the inlet of the cold water storage tank (6) being connected to the cold and warm air conditioning heat pump unit (8) via a fourth valve group (24), and the outlet of the cold water storage tank (6) being connected to the user end (9) via a third water pump (19); and further comprises a hot water storage tank (4), the inlet of the hot water storage tank (4) being connected to the first water pump (16) and the first valve group (21) in sequence via a second valve group (22), and the outlet of the hot water storage tank (4) being connected to the first check valve (27) and the second check valve (28) respectively via a second water pump (17).

6. A solar PV / T heat pump heat, electricity, cooling, and energy storage system according to claim 5, Features: The geothermal energy module comprises a buried pipe (7), the inlet and outlet of the buried pipe (7) are connected to a fourth water pump (18) and a sixth valve group (26) via a fifth valve group (25), and the sixth valve group (26) is connected to a cooling and heating air conditioning heat pump unit (8).

7. A solar PV / T heat pump heat, electricity, cooling, and energy storage system according to claim 6, Features: The cooling and heating air conditioning heat pump unit (8) is connected to the cooling and heating source end and the user end respectively; the cooling side inlet of the cold storage water tank (6) is connected to the fourth valve group (24), and the cooling side outlet of the cold storage water tank (6) is connected to the third water pump (19).

8. A solar PV / T heat pump heat, electricity, cooling, and energy storage system according to claim 7, Features: The inlet of the domestic hot water heat pump unit (5) is connected to the first one-way valve (27), the second water pump (17), and the hot water storage tank (4) in sequence, and the outlet is connected to the third one-way valve (29) and the user end (9) in sequence.

9. A solar PV / T heat pump heat, electricity, cooling, and energy storage system according to claim 8, Features: The cooling and heating air conditioning heat pump unit (8), the domestic hot water heat pump unit (5), the first water pump (16), the second water pump (17), the third water pump (19), the fourth water pump (18), and the return water pump (20) are connected in parallel with the AC box (12) and the power grid; the electricity generated by the PV and PV / T component arrays is collected together and sent to the photoelectric controller (10) in the system, and the generated electricity is preferentially supplied to the cooling and heating air conditioning heat pump unit (8), the domestic hot water heat pump unit (5), the compressor (14), the first water pump (16), the second water pump (17), the third water pump (19), the fourth water pump (18), and the return water pump (20); when the electricity generated is sufficient, the electricity is stored in the storage battery (13) for backup; when the electricity generated is insufficient, the electricity in the storage battery (13) is preferentially used; if the electricity in the storage battery (13) is also insufficient, the power grid is used for supplement.

10. A solar PV / T heat pump heat, electricity, cooling, and energy storage system according to claim 9, Features: The operating modes provided by the system are as follows: PV / T heat pump heating mode: when the temperature absorbed by the refrigerant in the back plate flow channel of the PV / T component array (1) reaches a temperature that can be directly used for heating, the first valve group (21), the first water pump (16), the third valve group (23), the sixth valve group (26), the cooling and heating air conditioning heat pump unit (8), the user end (9), and the return water pump (20) are opened to provide heating to the user end; PV / T heat pump cooling mode: This mode is carried out at night. The PV / T component array (1) causes the refrigerant to absorb cold energy by radiating to the sky at night, and transfers the cold energy of the refrigerant to the cooling and heating air conditioning heat pump unit (8). The temperature is further reduced by using the nighttime electricity valley price and stored in the cold storage water tank (6). At night, the first valve group (21), the first water pump (16), the third valve group (23), the sixth valve group (26), the cooling and heating air conditioning heat pump unit (8), the fourth valve group (24), and the cold storage water tank (6) are opened. The principle of cooling during the day is: first, use the cold energy in the cold storage tank to provide cooling for users. When the cold energy is exhausted or cannot meet the supply, use the ground source heat pump to provide cooling; PV / T heat pump domestic hot water mode: when the PV / T component array (1) has no heating demand, the first valve group (21), the first water pump (16), the second valve group (22), the hot water storage tank (4), and the second water pump (17) are opened. At this time, when the water temperature output from the second water pump (17) reaches the preset hot water demand, the second check valve (28) is opened to directly supply the water to the user end (9); if the water temperature output from the second water pump (17) does not reach the use demand, the first check valve (27), the hot water heat pump unit (5), and the third check valve (29) are opened to supply the water to the user end (9); PV / T underground pipe heating supplement mode: when PV / T heating is not required and the underground pipe needs heating supplement, this mode is operated, and the first valve group (21), the first water pump (16), the third valve group (23), the fifth valve group (25), the underground pipe (7), and the fourth water pump (18) are turned on; Ground source heat pump heating mode and ground source heat pump cooling mode: open the fifth valve group (25), the fourth water pump (18), the sixth valve group (26), the heating and cooling air conditioning heat pump unit (8), the user end (9), and the return water pump (20); In the domestic hot water production mode of the ground source heat pump, the fifth valve group (25), the fourth water pump (18), the third valve group (23), the second valve group (22), the heat storage tank (4), and the second water pump (17) are opened. At this time, when the water temperature output from the second water pump (17) reaches the hot water supply demand, the second check valve (28) is opened to directly supply the water to the user end (9); if the water temperature output from the second water pump (17) does not reach the use demand, the first check valve (27), the hot water heat pump unit (5), and the third check valve (29) are opened to supply the water to the user end (9).

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