Energy supply system for coupling solar energy with geothermal energy

Abstract

The utility model discloses an energy supply system for coupling solar energy with geothermal energy, and solves the technical problems that a ground source heat pump of an existing solar energy-ground source heat pump triple co-generation system is large in operation load and unstable in hot water supply. The system comprises a PV / T heat collection system and a buried pipe heat exchanger system, the PV / T heat collection system and the buried pipe heat exchanger system are both connected with a ground source heat pump unit, the ground source heat pump unit is connected with a user terminal and a living water tank, and the PV / T heat collection system is further connected with a power supply assembly. Heat collected by the PV / T assembly can be used as a low-temperature heat source of the ground source heat pump unit and can also be stored in soil to avoid soil temperature imbalance; the independent ground source heat pump is respectively used for heating, cooling and domestic hot water supply, different operation modes can be switched by comparing the outlet water temperature of the PV / T heat collecting system with the outlet water temperature of the buried pipe heat exchanger system during heating and domestic hot water supply, stable supply of heating and domestic hot water is achieved, and the energy-saving and environment-friendly effects are achieved. And comprehensive and efficient utilization of solar energy and geothermal energy is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of clean energy utilization, in particular to an energy supply system of solar energy coupled with geothermal energy. Background Art

[0002] The Chinese utility model patent with the authorization announcement date of 2021.06.22 and the authorization announcement number CN 213514066 U discloses a solar-ground source heat pump trigeneration system. The system as a whole is composed of a heat pump unit, a buried pipe heat exchanger, a user terminal, a solar collector, an insulated water tank, a water pump and a valve connection. By adjusting the solar soil heat storage capacity, it effectively solves the soil cold accumulation problem of the ground source heat pump trigeneration system in hot summer and cold winter areas in the prior art, ensuring the continuous and stable operation of the system to meet the summer cooling, winter heating and year-round domestic hot water requirements of the building.

[0003] When the above-mentioned solar energy-ground source heat pump trigeneration system is operated in summer, the ground source heat pump provides cooling according to the cooling condition, and solar energy is used to provide domestic hot water. When it is operated in winter, the ground source heat pump provides heating according to the heating condition, and solar energy is used first to provide domestic hot water. The insufficient part is provided by the ground source heat pump for auxiliary heating. When operating in the transition season when cooling and heating are not required, the ground source heat pump system is shut down, and only the solar energy heat storage circulation system and the water tank-soil heat storage circulation system are turned on. Solar energy is used first to provide domestic hot water, and the surplus solar energy is stored in the soil through the buried pipe heat exchanger. The control methods of various modes of the above-mentioned system are unreasonable. On the one hand, it relies on geothermal energy for cooling in summer and relies on geothermal energy for heating and auxiliary supply of domestic hot water in winter, which may cause a heavy operating load on the ground source heat pump; on the other hand, directly providing domestic hot water through solar energy is prone to unstable hot water supply. Utility Model Content

[0004] In view of the deficiencies in the above-mentioned background technology, the utility model proposes a solar energy coupled geothermal energy supply system, which solves the technical problems of large ground source heat pump operating load and unstable hot water supply in the existing solar energy-ground source heat pump trigeneration system.

[0005] The technical solution of this application is:

[0006] A solar energy coupled geothermal energy supply system includes a PV / T heat collection system and a buried pipe heat exchanger system. The PV / T heat collection system and the buried pipe heat exchanger system are both connected to a ground source heat pump unit. The ground source heat pump unit is respectively connected to a user terminal and a domestic water tank. The PV / T heat collection system is also connected to a power supply component.

[0007] Preferably, the PV / T heat collection system comprises a PV / T component, and the PV / T component is connected to a buried pipe heat exchanger system and a ground source heat pump unit in parallel via a heat collection tank.

[0008] Preferably, the power supply assembly includes an inverter and a storage battery connected to the PV / T assembly in sequence, and the storage battery is respectively connected to a ground source heat pump unit and a water pump assembly for conveying cold water or hot water as a heat conduction medium.

[0009] Preferably, the water pump assembly includes a plurality of water pumps, and each water pump is respectively arranged between the PV / T assembly and the hot water storage tank, between the ground source heat pump unit and the buried pipe heat exchanger system, between the ground source heat pump unit and the user terminal, and between the ground source heat pump unit and the domestic water tank.

[0010] Preferably, the ground source heat pump unit includes an evaporator, a compressor, a condenser, and a throttle valve connected in sequence.

[0011] Preferably, the ground source heat pump unit includes a first ground source heat pump unit and a second ground source heat pump unit. The condenser of the first ground source heat pump unit is connected to the user terminal, and the condenser of the second ground source heat pump unit is connected to the domestic water tank.

[0012] Preferably, the first ground source heat pump unit switches between heating and cooling through a four-way reversing valve.

[0013] Preferably, the buried pipe heat exchanger system includes a first buried pipe heat exchanger connected to the evaporator of the first ground source heat pump unit and a second buried pipe heat exchanger connected to the evaporator of the second ground source heat pump unit.

[0014] Preferably, the ground source heat pump unit includes a first ground source heat pump unit, a second ground source heat pump unit, and a third ground source heat pump unit. The condenser of the first ground source heat pump unit is connected to the user terminal, the condenser of the second ground source heat pump unit is connected to the domestic water tank, and the evaporator of the third ground source heat pump unit is connected to the user terminal.

[0015] Preferably, the buried pipe heat exchanger system includes a first buried pipe heat exchanger connected to the evaporator of the first ground source heat pump unit, a second buried pipe heat exchanger connected to the evaporator of the second ground source heat pump unit, and a third buried pipe heat exchanger connected to the condenser of the third ground source heat pump unit.

[0016] Compared with the prior art, the technical solution disclosed by the present utility model has the following beneficial effects:

[0017] 1. The present utility model collects the heat of solar energy through the PV / T assembly. When the PV / T assembly is connected to the ground source heat pump unit through the hot water storage tank, the collected heat can be used as the low-temperature heat source of the ground source heat pump unit. When the PV / T assembly is connected to the buried pipe heat exchanger system, the heat collected by the PV / T assembly can be stored in the soil to solve the problem of soil temperature imbalance;

[0018] 2. The utility model is provided with multiple independent ground-source heat pumps, which are respectively used for heating, cooling or supplying domestic hot water. When heating and supplying domestic hot water, by comparing the outlet water temperature of the PV / T heat collection system with the outlet water temperature of the buried pipe heat exchanger system and switching different operation modes, the stable supply of heating, cooling and domestic hot water is realized, and the comprehensive and efficient utilization of solar energy and geothermal energy and zero carbon emissions are achieved. Brief Description of the Drawings

[0019] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 is the overall working principle diagram of the present utility model;

[0021] Figure 2 is the working principle diagram of the PV / T-ground source heat pump heating / supplying domestic hot water mode of the present utility model;

[0022] Figure 3 is the working principle diagram of the buried pipe-ground source heat pump heating / cooling mode of the present utility model;

[0023] Figure 4 is the working principle diagram of the buried pipe-ground source heat pump supplying domestic hot water mode of the present utility model;

[0024] Figure 5 is the working principle diagram of the PV / T-buried pipe-ground source heat pump heating mode of the present utility model;

[0025] Figure 6 is the working principle diagram of the PV / T-buried pipe-ground source heat pump supplying domestic hot water mode of the present utility model;

[0026] Figure 7 is the working principle diagram of the PV / T-buried pipe-ground source heat pump heating / supplying domestic hot water mode of the present utility model;

[0027] Figure 8 is the working principle diagram of the PV / T-buried pipe heat storage mode of the present utility model;

[0028] Figure 9 is the working principle diagram of the PV / T power generation and power supply mode of the present utility model.

[0029] Explanation of the Reference Numerals in the Drawings:

[0030] 1 PV / T heat collection system, 101 PV / T module, 102 hot water storage tank, 2 ground source heat pump unit 1, 201 evaporator 1, 202 compressor 1, 203 four-way reversing valve, 204 condenser 1, 205 throttle valve 1, 3 ground source heat pump unit 2, 301 evaporator 2, 302 compressor 2, 303 condenser 2, 304 throttle valve 2, 4 buried pipe heat exchanger 1, 5 buried pipe heat exchanger 2, 6 user terminal, 7 domestic water tank, 8 power supply component, 801 inverter, 802 battery, 9 valve component, 901 valve 1, 902 valve 2, 903 valve 3, 904 valve 4, 905 valve 5, 906 valve 6, 907 valve 7, 908 valve 8, 909 valve 9, 910 valve 10, 10 water pump component, 1001 water pump 1, 1002 water pump 2, 1003 water pump 3, 1004 water pump 4, 1005 water pump 5. Detailed implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] An energy supply system coupling solar energy and geothermal energy includes a PV / T heat collection system 1 and a buried pipe heat exchanger system. Both the PV / T heat collection system 1 and the buried pipe heat exchanger system are connected to a ground source heat pump unit, and the ground source heat pump unit is respectively connected to a user terminal 6 and a domestic water tank 7. The PV / T heat collection system 1 is also connected to a power supply component 8.

[0033] Specifically, as Figure 1 shown, the energy supply system includes a ground source heat pump unit 1 2 and a ground source heat pump unit 2 3 connected to the PV / T heat collection system 1. The ground source heat pump unit 1 2 is also connected to a buried pipe heat exchanger 1 4 and a user terminal 6. The ground source heat pump unit 2 3 is also connected to a buried pipe heat exchanger 2 5 and a domestic water tank 7. The PV / T heat collection system 1 is also connected to a power supply component 8 for supplying power to the energy supply system. The PV / T heat collection system 1 can be used as a heat source and can also be used for power generation. After the PV / T heat collection system 1 generates electricity, it supplies power to the energy supply system through the power supply component 8. The PV / T heat collection system 1 uses solar energy, and the buried pipe heat exchanger system uses soil source. Since the temperature of the soil source is less affected by external environmental changes, the outlet water temperature of the buried pipe heat exchanger system is relatively stable. Since solar energy is greatly affected by environmental changes, the outlet water temperature of the PV / T heat collection system 1 fluctuates greatly.

[0034] Furthermore, the outlet water temperature of the PV / T heat collection system 1 and the outlet water temperature of the ground pipe heat exchanger system can be detected by a temperature sensor. When solar energy is sufficient and the outlet water temperature of the PV / T thermal collection system 1 is greater than 10°C or above, the PV / T thermal collection system 1 is selected to supply domestic hot water to the domestic water tank 7 through the ground source heat pump unit 2 3. In the heating season, the ground source heat pump unit 1 2 is used to heat the user terminal 6; when solar energy is insufficient and the outlet water temperature of the PV / T thermal collection system 1 is less than or equal to 10°C, by comparing the outlet water temperature of the PV / T thermal collection system 1, the outlet water temperature of the buried pipe heat exchanger 1 4 and the outlet water temperature of the buried pipe heat exchanger 2 5, the one with the higher outlet water temperature is selected for heating or domestic hot water; in the cooling season, cooling is provided to the user terminal 6 through the buried pipe heat exchanger 1 4 and the ground source heat pump unit 2; in the non-heating season, when the outlet water temperature of the PV / T thermal collection system 1 is greater than the outlet water temperature of the buried pipe heat exchanger 2 5 to 5°C or above, the PV / T thermal collection system 1 stores heat to the soil through the buried pipe heat exchanger 2 5.

[0035] Based on the above embodiment, the PV / T heat collection system 1 includes a PV / T component 101, and the PV / T component 101 is connected to a ground pipe heat exchanger system and a ground source heat pump unit in parallel through a heat collection tank 102. Figure 1 As shown, the PV / T heat collection system 1 includes a PV / T component 101, a heat collection tank 102 and a water pump 1001 connected in sequence. The PV / T component 101 is a photovoltaic / photothermal component that can collect heat from solar energy. When the PV / T component 101 is connected to the ground source heat pump unit 1 2 and the ground source heat pump unit 2 3 through the heat collection tank 102, the heat collected by the PV / T component 101 is used as a low-temperature heat source for the ground source heat pump unit 1 2 and the ground source heat pump unit 2 3 through the heat collection tank 102. When the PV / T component 101 is connected to the buried pipe heat exchanger 2 5 through the heat collection tank 102, the heat collected by the PV / T component 101 is stored in the soil to solve the problem of soil temperature imbalance.

[0036] Based on the above embodiments, Figure 1 As shown, the power supply component 8 includes an inverter 801 and a battery 802 which are connected to the PV / T component 101 in sequence, and the battery 802 is respectively connected to the ground source heat pump unit and the water pump component 10 for conveying cold water or hot water as a heat transfer medium. The PV / T component 101 is a photovoltaic / photothermal component that can use solar energy to generate electricity. The PV / T component 101 converts the current into direct current through the inverter 801 and then stores it in the battery 802. When an abnormal power outage occurs, the battery 802 can supply power to the ground source heat pump unit and the water pump component 10, and the energy supply system can operate stably.

[0037] Based on the above embodiments, the water pump assembly 10 includes a plurality of water pumps, each of which is respectively arranged between the PV / T assembly 101 and the hot water storage tank 102, between the ground source heat pump unit and the ground heat exchanger system, between the ground source heat pump unit and the user terminal 6, and between the ground source heat pump unit and the domestic water tank 7. As Figure 1 shown, the water pump assembly 10 includes a first water pump 1001 connected between the PV / T assembly 101 and the hot water storage tank 102, a second water pump 1002 connected between the first ground source heat pump unit 2 and the first ground heat exchanger 4, a fourth water pump 1004 connected between the second ground source heat pump unit 3 and the second ground heat exchanger 5, a third water pump 1003 connected between the first ground source heat pump unit 2 and the user terminal 6, and a fifth water pump 1005 connected between the second ground source heat pump unit 3 and the domestic water tank 7.

[0038] Based on the above embodiments, the ground source heat pump unit includes an evaporator, a compressor, a condenser, and a throttle valve connected in sequence. By switching the order of water flowing into the evaporator and the condenser, heating and cooling of the user terminal 6 are switched.

[0039] Based on the above embodiments, the ground source heat pump unit includes a first ground source heat pump unit 2 and a second ground source heat pump unit 3. The condenser 204 of the first ground source heat pump unit 2 is connected to the user terminal 6, and the condenser 303 of the second ground source heat pump unit 3 is connected to the domestic water tank 7. As Figure 1 shown, the first ground source heat pump unit 2 includes an evaporator 201, a compressor 202, a condenser 204, and a throttle valve 205 connected in sequence; the second ground source heat pump unit 3 includes an evaporator 301, a compressor 302, a condenser 303, and a throttle valve 304 connected in sequence. Heating or cooling is provided to the user terminal 6 through the first ground source heat pump unit 2, and domestic hot water is provided to the domestic water tank 7 through the second ground source heat pump unit 3.

[0040] Based on the above embodiments, the first ground source heat pump unit 2 switches heating and cooling through a four-way reversing valve 203. As Figure 1 shown, a four-way reversing valve 203 is also provided between the evaporator 201 and the condenser 204. By means of the four-way reversing valve 203, the order of water flowing into the evaporator 201 and the condenser 204 is changed, thereby switching heating and cooling.

[0041] Based on the above embodiments, the ground heat exchanger system includes a first ground heat exchanger 4 connected to the evaporator 201 of the first ground source heat pump unit 2 and a second ground heat exchanger 5 connected to the evaporator 301 of the second ground source heat pump unit 3. The first ground heat exchanger 4 is used for heating or cooling the user terminal 6 through the first ground source heat pump unit 2, and the second ground heat exchanger 5 provides domestic hot water to the domestic water tank 7 through the second ground source heat pump unit 3.

[0042] On the basis of the above embodiments, the ground source heat pump unit includes a first ground source heat pump unit 2, a second ground source heat pump unit 3, and a third ground source heat pump unit. The condenser 204 of the first ground source heat pump unit 2 is connected to the user terminal 6, the condenser 303 of the second ground source heat pump unit 3 is connected to the domestic water tank 7, and the evaporator 3 of the third ground source heat pump unit is connected to the user terminal 6. The first ground source heat pump unit 2 provides heating to the user terminal 6, the second ground source heat pump unit 3 provides domestic hot water to the domestic water tank 7, and the third ground source heat pump unit provides cooling to the user terminal 6.

[0043] On the basis of the above embodiments, the ground heat exchanger system includes a first ground heat exchanger 4 connected to the evaporator 201 of the first ground source heat pump unit 2, a second ground heat exchanger 5 connected to the evaporator 301 of the second ground source heat pump unit 3, and a third ground heat exchanger connected to the condenser 3 of the third ground source heat pump unit. The first ground heat exchanger 4 provides heating to the user terminal 6 through the first ground source heat pump unit 2, the second ground heat exchanger 5 provides domestic hot water to the domestic water tank 7 through the second ground source heat pump unit 3, and the third ground heat exchanger provides cooling to the user terminal 6 through the third ground source heat pump unit.

[0044] As described above, the present utility model has multiple operating modes, and the operating methods of each mode are as follows:

[0045] PV / T - ground source heat pump heating / domestic hot water supply mode: The PV / T - ground source heat pump heating mode operates during the heating season, and the domestic hot water supply mode can operate throughout the year. As Figure 2 shown, the PV / T - ground source heat pump heating / domestic hot water supply mode includes the first ground source heat pump unit 2 and the second ground source heat pump unit 3 connected to the PV / T collector system 1. The water pump 1001 is turned on, and the PV / T collector system 1 stores heat in the hot water storage tank 102 through the PV / T module 101. When the outlet water temperature of the hot water storage tank 102 is greater than 10 °C, the three - way valve valves 901, 902, 903, 904, 905, 907, 908, 909, 910, the water pumps 1002, 1003, 1004, 1005, the first ground source heat pump unit 2, and the second ground source heat pump unit 3 are turned on. The hot water storage tank 102 provides domestic hot water to the domestic water tank 7 throughout the year through the second ground source heat pump unit 3; during the heating season, the hot water storage tank 102 provides heating to the user terminal 6 through the first ground source heat pump unit 2.

[0046] Ground heat exchanger - ground source heat pump heating / domestic hot water supply mode: The ground heat exchanger - ground source heat pump heating mode operates during the heating season, and the ground heat exchanger - ground source heat pump domestic hot water supply mode can operate throughout the year. As Figure 3 and Figure 4As shown, the buried pipe - ground source heat pump heating / domestic hot water supply mode includes the ground source heat pump unit 2 connected to the first buried pipe heat exchanger 4 and the ground source heat pump unit 3 connected to the second buried pipe heat exchanger 5. When the outlet water temperature of the hot water storage tank 102 is less than 10°C and the outlet water temperature of the hot water storage tank 102 is less than the outlet water temperatures of the first buried pipe heat exchanger 4 and the second buried pipe heat exchanger 5, open valve six 906, valve seven 907, valve eight 908, valve nine 909, valve ten 910, water pump four 1004, water pump five 1005 and the ground source heat pump unit 3. The second buried pipe heat exchanger 5 supplies domestic hot water to the domestic water tank 7 through the ground source heat pump unit 3; open valve two 902, valve three 903, water pump two 1002, water pump three 1003 and the ground source heat pump unit 2. In the heating season, the first buried pipe heat exchanger 4 heats the user terminal 6 through the ground source heat pump unit 2.

[0047] Buried pipe - ground source heat pump cooling mode: The buried pipe - ground source heat pump cooling mode operates in the cooling season. As Figure 3 shown, in the cooling season, open valve two 902, valve three 903, water pump two 1002, water pump three 1003 and the ground source heat pump unit 2. The first buried pipe heat exchanger 4 changes the sequence of water flowing into the evaporator 201 and the condenser 204 of the ground source heat pump unit 2 through the ground source heat pump unit 2 and the four - way reversing valve 203 to achieve the switching between heating the user terminal 6 and cooling the user terminal 6.

[0048] PV / T - buried pipe - ground source heat pump heating mode: The PV / T - buried pipe - ground source heat pump heating mode operates in the heating season. As Figure 5 shown, the PV / T - buried pipe - ground source heat pump heating mode includes the PV / T heat collection system 1 and the first buried pipe heat exchanger 4 connected in parallel. Open water pump one 1001. The PV / T heat collection system 1 stores heat in the hot water storage tank 102 through the PV / T module 101. In the heating season, when the outlet water temperature of the hot water storage tank 102 is less than 10°C and the outlet water temperature of the hot water storage tank 102 is greater than the outlet water temperature of the first buried pipe heat exchanger 4, open the three - way valve valve one 901, valve two 902, valve three 903, valve four 904, water pump two 1002, water pump three 1003, and the ground source heat pump unit 2. The hot water storage tank 102 heats the user terminal 6 through the ground source heat pump unit 2; when the outlet water temperature of the hot water storage tank 102 is less than 10°C and the outlet water temperature of the hot water storage tank 102 is less than or equal to the outlet water temperature of the first buried pipe heat exchanger 4, close valve two 902 and valve three 903, and the first buried pipe heat exchanger 4 heats the user terminal 6 through the ground source heat pump unit 2.

[0049] PV / T - buried pipe - ground source heat pump domestic hot water supply mode: The PV / T - buried pipe - ground source heat pump domestic hot water supply mode can operate throughout the year. As Figure 6As shown in the figure, the PV / T-buried pipe-ground source heat pump domestic hot water supply mode includes a connected PV / T heat collection system 1 and a buried pipe heat exchanger 5. When the water pump 1001 is turned on, the PV / T module 101 continuously stores heat in the hot water storage tank 102. When the outlet water temperature of the hot water storage tank 102 is less than 10°C and the outlet water temperature of the hot water storage tank 102 is greater than the outlet water temperature of the buried pipe heat exchanger 5, the three-way valve valve 1 901, valve 4 904, valve 5 905, valve 6 906, valve 7 907, valve 8 908, valve 9 909, valve 10 910, water pump 4 1004, water pump 5 1005, and the ground source heat pump unit 3 are turned on. The hot water storage tank 102 supplies domestic hot water to the domestic water tank 7 through the ground source heat pump unit 2. When the outlet water temperature of the hot water storage tank 102 is less than 10°C and the outlet water temperature of the hot water storage tank 102 is less than or equal to the outlet water temperature of the buried pipe heat exchanger 5, the valve 7 907 and the valve 10 910 are closed, and the buried pipe heat exchanger 5 supplies domestic hot water to the domestic water tank 7 through the ground source heat pump unit 2.

[0050] PV / T-buried pipe-ground source heat pump heating / domestic hot water supply mode: The PV / T-buried pipe-ground source heat pump heating mode operates during the heating season, and the domestic hot water supply mode can operate throughout the year. As Figure 7 As shown in the figure, the PV / T-buried pipe-ground source heat pump heating / domestic hot water supply mode includes a buried pipe heat exchanger 1 4 and a buried pipe heat exchanger 2 5 connected to the PV / T heat collection system 1. When the water pump 1001 is turned on, the PV / T heat collection system 1 stores heat in the hot water storage tank 102 through the PV / T module 101. When the outlet water temperature of the hot water storage tank 102 is less than 10°C and the outlet water temperature of the hot water storage tank 102 is greater than the outlet water temperatures of the buried pipe heat exchanger 1 4 and the buried pipe heat exchanger 2 5, the three-way valve valve 1 901, valve 2 902, valve 3 903, valve 4 904, valve 5 905, valve 7 907, valve 10 910, water pump 2 1002, water pump 3 1003, water pump 4 1004, water pump 5 1005, the ground source heat pump unit 1 2, and the ground source heat pump unit 2 3 are turned on. The hot water storage tank 102 supplies heat to the user terminal 6 through the ground source heat pump unit 1 2 and supplies domestic hot water to the domestic water tank 7 through the ground source heat pump unit 2 3. When the outlet water temperature of the hot water storage tank 102 is less than 10°C and the outlet water temperature of the hot water storage tank 102 is less than or equal to the outlet water temperatures of the buried pipe heat exchanger 1 4 and the buried pipe heat exchanger 2 5, the valve 2 902, valve 3 903, valve 7 907, and valve 10 910 are closed. The buried pipe heat exchanger 1 4 supplies heat to the user terminal 6 through the ground source heat pump unit 1 2, and the buried pipe heat exchanger 2 5 supplies domestic hot water to the domestic water tank 7 through the ground source heat pump unit 2 3.

[0051] PV / T-buried pipe heat storage mode: The PV / T-buried pipe heat storage mode operates during the non-heating season. As Figure 8As shown in the figure, the PV / T-buried pipe heat storage mode includes a connected PV / T heat collection system 1 and a buried pipe heat exchanger 5. In the non-heating season, the water pump 1001 is turned on. The PV / T heat collection system 1 stores heat in the hot water storage tank 102 through the PV / T module 101. When the outlet water temperature of the hot water storage tank 102 is 5°C or more higher than the outlet water temperature of the buried pipe heat exchanger 5, the three-way valve valve 1 901, valve 4 904, valve 5 905, valve 6 906, valve 7 907, valve 8 908, valve 9 909, and valve 10 910 are turned on. The PV / T heat collection system 1 uses the buried pipe heat exchanger 5 as a heat source to store heat in the soil.

[0052] PV / T power generation and power supply mode: The PV / T power generation and power supply mode can operate throughout the year. As Figure 9 shown in the figure, the PV / T power generation and power supply mode generates electricity through the PV / T module 101 and stores it in the storage battery 802, and supplies power through the storage battery 802. The electric energy generated by the PV / T module 101 is stored in the storage battery 802, and then the electric energy is supplied to the ground source heat pump unit 1 2, the ground source heat pump unit 2 3 and various power-consuming devices such as water pumps in the energy supply system for use.

[0053] The details not described in this utility model are all conventional technical means well known to those skilled in the art.

[0054] The above content shows and describes the basic principle, main features and beneficial effects of this utility model. The above is only a preferred embodiment of this utility model and is not intended to limit this utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this utility model shall be included in the protection scope of this utility model.

Claims

1. A solar energy-coupled geothermal energy supply system, characterized in that: It includes a PV / T heat collection system (1) and a buried pipe heat exchanger system. Both the PV / T heat collection system (1) and the buried pipe heat exchanger system are connected to a ground source heat pump unit, which is respectively connected to a user terminal (6) and a domestic water tank (7). The PV / T heat collection system is also connected to a power supply component (8).

2. The energy supply system coupling solar energy and geothermal energy according to claim 1, wherein: The PV / T heat collection system (1) includes PV / T modules (101), and the PV / T modules (101) are connected to the parallel-connected buried pipe heat exchanger system and the ground source heat pump unit through a heat collection water tank (102).

3. The energy supply system coupling solar energy and geothermal energy according to claim 2, wherein: The power supply component includes an inverter (801) and a storage battery (802) that are sequentially connected to the PV / T modules (101). The storage battery (802) is respectively connected to the ground source heat pump unit and a water pump assembly (10) for conveying cold water or hot water as a heat conduction medium.

4. The energy supply system coupling solar energy and geothermal energy according to claim 3, wherein: The water pump assembly (10) includes several water pumps, and each water pump is respectively arranged between the PV / T modules (101) and the heat collection water tank (102), between the ground source heat pump unit and the buried pipe heat exchanger system, between the ground source heat pump unit and the user terminal (6), and between the ground source heat pump unit and the domestic water tank (7).

5. The energy supply system coupling solar energy with geothermal energy according to any one of claims 1-4, characterized in that: The ground source heat pump unit includes an evaporator, a compressor, a condenser, and a throttle valve that are connected in sequence.

6. The energy supply system integrating solar energy and geothermal energy according to claim 5, wherein: The ground source heat pump unit includes a ground source heat pump unit one (2) and a ground source heat pump unit two (3). The condenser one (204) of the ground source heat pump unit one (2) is connected to the user terminal (6), and the condenser two (303) of the ground source heat pump unit two (3) is connected to the domestic water tank (7).

7. The energy supply system coupling solar energy and geothermal energy according to claim 6, wherein: The ground source heat pump unit one (2) switches between heating and cooling through a four-way reversing valve (203).

8. The energy supply system coupling solar energy with geothermal energy according to claim 7, characterized in that: The buried pipe heat exchanger system includes a buried pipe heat exchanger one (4) connected to the evaporator one (201) of the ground source heat pump unit one (2) and a buried pipe heat exchanger two (5) connected to the evaporator two (301) of the ground source heat pump unit two (3).

9. The energy supply system coupling solar energy and geothermal energy according to claim 5, wherein: The ground source heat pump unit includes a ground source heat pump unit one (2), a ground source heat pump unit two (3), and a ground source heat pump unit three. The condenser one (204) of the ground source heat pump unit one (2) is connected to the user terminal (6), the condenser two (303) of the ground source heat pump unit two (3) is connected to the domestic water tank (7), and the evaporator three of the ground source heat pump unit three is connected to the user terminal (6).

10. The energy supply system coupling solar energy with geothermal energy according to claim 9, characterized in that: The buried pipe heat exchanger system includes a buried pipe heat exchanger one (4) connected to the evaporator one (201) of the ground source heat pump unit one (2), a buried pipe heat exchanger two (5) connected to the evaporator two (301) of the ground source heat pump unit two (3), and a buried pipe heat exchanger three connected to the condenser three of the ground source heat pump unit three.

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