Solar photovoltaic heat and buried pipe heat exchange dual-system integrated air conditioning system

Abstract

A solar photovoltaic heat and buried pipe heat exchange dual-system integrated air conditioning system comprises a PV / T photovoltaic panel, a heat storage tank, a ground source pipe well and a heat exchanger assembly, has multiple operation modes, can provide domestic water for a user through the PV / T photovoltaic panel, and can transmit heat of the PV / T photovoltaic panel to the heat storage tank and the ground source pipe well for storage; the heat exchanger assembly can absorb heat of the heat storage tank and the ground source tube well through the evaporation process, then transfer heat released in the condensation process to a ground radiation pipeline of a user for heating, and also can absorb heat of the ground radiation pipeline of the user through the evaporation process for refrigeration. And then heat released in the condensation process is transferred to the heat storage tank and the ground source tube well to be stored, renewable energy sources are effectively utilized, multiple service modes are provided, energy efficiency is improved, the energy cost of a user is reduced, the annual cold and heat requirements are met, and the multiple advantages of being simple in structure, flexible to control, stable in operation and the like are achieved.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning systems, and in particular to an integrated air conditioning system with solar photovoltaic heat and buried pipe heat exchange. Background Art

[0002] At present, the energy market is facing huge opportunities and challenges, and energy conservation and carbon reduction have become a hot topic of social concern. With the continuous development of renewable energy technology, solar energy, as a clean energy, has gradually been widely used in the fields of heating and cooling; traditional air-conditioning systems are in urgent need of improvement due to their high energy consumption and certain impact on the environment.

[0003] In my country's extremely cold and cold regions, the heating demand of users is greater than the cooling demand. The ground source heat pump system is prone to insufficient soil heat supplement in summer and cannot meet the heating demand in winter, resulting in a drop in soil temperature and affecting the ecology. In addition, although the ground source heat pump can utilize shallow geothermal resources, there is a problem of seasonal thermal imbalance; PV / T, or solar photovoltaic / thermal technology, can simultaneously achieve photoelectric conversion and photothermal utilization, but the coordinated utilization of the heat and electricity it generates in the air conditioning system is not yet perfect; CO 2 High-temperature heat pumps have advantages such as efficient heating, but a single operating mode cannot meet the complex needs of different seasons throughout the year. Therefore, an air-conditioning system that integrates multiple technologies and has multiple operating modes to achieve efficient cooling and heating, energy storage and heating has become the key to the development of the industry. Summary of the invention

[0004] The purpose of the present invention is to provide an integrated air-conditioning system of solar photovoltaic heat and buried pipe heat exchange to improve the utilization of solar energy and geothermal energy and promote carbon neutrality.

[0005] The technical solution adopted by the present invention to solve the above technical problems is: a solar photovoltaic heat and underground pipe heat exchange dual-system integrated air conditioning system, including PV / T photovoltaic panels, heat storage tanks, ground source pipe wells and two groups of heat exchanger components, one group of heat exchanger components includes an evaporative heat exchanger and a condensing heat exchanger, and the inner circulation heat exchange channels of the evaporative heat exchanger and the condensing heat exchanger are both connected to the inner circulation pipeline provided with a first compressor, so that the evaporative heat exchanger and the condensing heat exchanger can perform cyclic heat exchange; the other group of heat exchanger components includes a first multifunctional heat exchanger and a second multifunctional heat exchanger, both of which can switch between evaporation mode and condensation mode, and the inner circulation heat exchange channels of the two multifunctional heat exchangers are both connected to the inner circulation pipeline provided with a second compressor, so that the two multifunctional heat exchangers can perform cyclic heat exchange; The two interfaces of the external circulation heat exchange channel of the second multifunctional heat exchanger are respectively connected to the inlet and outlet of the user's ground radiation pipeline; the PV / T photovoltaic panel includes a photovoltaic cell panel on the surface and a cooling channel pipe on the bottom layer, and the cooling channel pipe is respectively provided with two liquid inlets and two liquid outlets, wherein the first liquid inlet and the first liquid outlet are respectively connected to the inlet and outlet of the user's domestic hot water pipeline; the first liquid inlet and the first liquid outlet are also respectively connected to the inlet and outlet of the external circulation heat exchange channel of the evaporative heat exchanger, and the inlet and outlet of the external circulation heat exchange channel of the condensing heat exchanger are respectively connected to the inlet and outlet of the first heat exchange channel of the heat storage tank; The ground source pipe well has an underground pipeline, two inner pipes and two outer pipes are connected to the underground pipeline, the length of the buried pipeline between the two inner pipes is less than the length of the buried pipeline between the two outer pipes, the outlet ends of the inner pipe and the outer pipe on the same side are provided with a fourth pipeline switching switch, and the outlet ends of the inner pipe and the outer pipe on the other side are provided with a third pipeline switching switch, the pipeline switching switch can be switched to connect to one of the inner pipe or the outer pipe, the fourth pipeline switching switch is also connected to the second pipeline switching switch, the second pipeline switching switch can be switched to connect to the second liquid outlet of the PV / T photovoltaic panel or the outlet of the second heat exchange channel of the heat storage tank; the third pipeline switching switch is also connected to the inlet of the external circulation heat exchange channel of the first multifunctional heat exchanger, the outlet of the external circulation heat exchange channel of the first multifunctional heat exchanger is connected to the first pipeline switching switch, and the first pipeline switching switch can be switched to connect to the second liquid inlet of the PV / T photovoltaic panel or the inlet of the second heat exchange channel of the heat storage tank; The system is also connected to a controller or an external control system, which can automatically control or manually control the operating mode of the system, including heating mode, heat storage cooling mode and supplementary heating mode; When the system is in heating mode, the first compressor and the second compressor are both started, the first pipeline switching switch and the second pipeline switching switch are both switched to connect to the second heat exchange channel of the heat storage tank, the third pipeline switching switch and the fourth pipeline switching switch are both switched to connect to the inner pipe, so as to provide domestic water for users through the PV / T photovoltaic panels, and transfer the heat of the PV / T photovoltaic panels to the heat storage tank, the first multifunctional heat exchanger is switched to the evaporation mode, absorbs the heat of the heat storage tank and the ground source pipe well through the evaporation process, and transfers the heat to the second multifunctional heat exchanger through the internal circulation pipeline, the second multifunctional heat exchanger is switched to the condensation mode, and transfers the heat released in the condensation process to the user's ground radiation pipeline; When the system is in the heat storage cooling mode, the first compressor and the second compressor are both started, the first pipeline switching switch and the second pipeline switching switch are both switched to connect to the second heat exchange channel of the heat storage tank, the third pipeline switching switch and the fourth pipeline switching switch are both switched to connect to the external pipe, so as to provide domestic water for users through the PV / T photovoltaic panel, and transfer the heat of the PV / T photovoltaic panel to the heat storage tank, the first multifunctional heat exchanger is switched to the condensation mode, and the heat of the second multifunctional heat exchanger is absorbed through the internal circulation pipeline, and the heat released in the condensation process is transferred to the heat storage tank and the ground source pipe well for storage, and the second multifunctional heat exchanger is switched to the evaporation mode, and the heat of the user's ground radiation pipeline is absorbed through the evaporation process; When the system is in the heating supplement mode, the first compressor and the second compressor both stop running, the first pipeline switching switch and the second pipeline switching switch are respectively switched to connect to the second liquid inlet and the second liquid outlet of the PV / T photovoltaic panel, and the third pipeline switching switch and the fourth pipeline switching switch are both switched to connect to the external pipe, thereby providing domestic water to users through the PV / T photovoltaic panel, and transferring the heat of the PV / T photovoltaic panel to the ground source pipe well for storage.

[0006] Preferably, a second throttle valve is installed on the internal circulation pipeline provided with the first compressor, and a first throttle valve is installed on the internal circulation pipeline provided with the second compressor.

[0007] Preferably, the power generation circuit of the PV / T photovoltaic panel can supply power to the system.

[0008] According to the above technical solution, the beneficial effects of the present invention are: The present invention can effectively utilize renewable energy, provide multiple service modes, improve energy efficiency, and reduce users' energy costs. It can improve power generation efficiency by lowering the temperature of photovoltaic panels, give full play to geothermal energy resources, improve the refrigeration and heating efficiency of the unit, restore soil thermal balance through heat supplement and heat storage mechanisms, and provide users with cooling in summer and heating in winter through flexible switching of system working modes, meeting the cooling and heating needs throughout the year. It has multiple advantages such as simple structure, flexible control, and stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the system principle of the present invention.

[0010] Markings in the figure: 1. PV / T photovoltaic panel, 2. evaporative heat exchanger, 3. first compressor, 4. condensing heat exchanger, 5. heat storage tank, 6. first multifunctional heat exchanger, 7. second multifunctional heat exchanger, 8. second compressor, 9. first pipeline switching switch, 10. second pipeline switching switch, 11. third pipeline switching switch, 12. fourth pipeline switching switch, 13. ground source well, 14. first throttle valve, 15. second throttle valve. DETAILED DESCRIPTION

[0011] Referring to the accompanying drawings, the specific implementation is as follows: As Figure 1 shown, a solar photovoltaic thermal and buried pipe heat exchange dual-system integrated air conditioner system includes a PV / T photovoltaic panel 1, a heat storage tank 5, a ground source pipe well 13, and two groups of heat exchanger components. One group of heat exchanger components includes an evaporation heat exchanger 2 and a condensation heat exchanger 4. The inner circulation heat exchange channels of the evaporation heat exchanger 2 and the condensation heat exchanger 4 are both connected to an inner circulation pipeline provided with a first compressor 3, enabling the evaporation heat exchanger 2 and the condensation heat exchanger 4 to conduct circulation heat exchange. A second throttle valve 15 is also installed on this inner circulation pipeline. The other group of heat exchanger components includes a first multi-functional heat exchanger 6 and a second multi-functional heat exchanger 7. Both multi-functional heat exchangers can switch between an evaporation mode and a condensation mode. The inner circulation heat exchange channels of the two multi-functional heat exchangers are both connected to an inner circulation pipeline provided with a second compressor 8, enabling the two multi-functional heat exchangers to conduct circulation heat exchange. A first throttle valve 14 is also installed on this inner circulation pipeline.

[0012] As Figure 1 shown, the two interfaces of the outer circulation heat exchange channel of the second multi-functional heat exchanger 7 are respectively connected to the inlet and outlet of the ground radiation pipeline of the user. The PV / T photovoltaic panel 1 adopts solar photovoltaic / thermal technology, including a photovoltaic cell panel on the surface layer and a cooling flow channel pipe on the bottom layer. The cooling flow channel pipe is respectively provided with two liquid inlets and two liquid outlets. Among them, the first liquid inlet and the first liquid outlet are respectively connected to the inlet and outlet of the domestic hot water pipeline of the user, and can provide domestic hot water for the user. In addition, the power generation circuit of the PV / T photovoltaic panel 1 can directly supply power to the system.

[0013] As Figure 1 shown, the cooling flow channel pipe of the PV / T photovoltaic panel 1 is respectively provided with two liquid inlets and two liquid outlets. Among them, the first liquid inlet and the first liquid outlet are respectively connected to the inlet and outlet of the domestic hot water pipeline of the user. The first liquid inlet and the first liquid outlet are also respectively connected to the inlet and outlet of the outer circulation heat exchange channel of the evaporation heat exchanger 2. The inlet and outlet of the outer circulation heat exchange channel of the condensation heat exchanger 4 are respectively connected to the inlet and outlet of the first heat exchange channel of the heat storage tank 5.

[0014] As Figure 1 shown, the ground source pipe well 13 has a buried pipeline. Two inner pipes and two outer pipes are connected to the buried pipeline. The length of the buried pipeline between the two inner pipes is less than the length of the buried pipeline between the two outer pipes. A fourth pipeline switching switch 12 is provided at the outlet ends of the inner pipe and the outer pipe on the same side, and a third pipeline switching switch 11 is provided at the outlet ends of the inner pipe and the outer pipe on the other side. When the fourth pipeline switching switch 12 and the third pipeline switching switch 11 are in position a, they can be switched to be connected to the inner pipe, and when in position b, they can be switched to be connected to the outer pipe.

[0015] As Figure 1As shown, the fourth pipeline switching switch 12 is also connected to the second pipeline switching switch 10, which can be switched to connect to the second liquid outlet of the PV / T photovoltaic panel 1 when in position a, and can be switched to connect to the outlet of the second heat exchange channel of the heat storage tank 5 when in position b. The third pipeline switching switch 11 is also connected to the inlet of the external circulation heat exchange channel of the first multifunctional heat exchanger 6, and the outlet of the external circulation heat exchange channel of the first multifunctional heat exchanger 6 is connected to the first pipeline switching switch 9, which can be switched to connect to the second liquid inlet of the PV / T photovoltaic panel 1 when in position a, and can be switched to connect to the inlet of the second heat exchange channel of the heat storage tank 5 when in position b.

[0016] The system is also connected to a controller or an external control system, which can automatically control or manually control the operating mode of the system, including heating mode, heat storage cooling mode and supplementary heating mode.

[0017] When the system is in heating mode, the first compressor 3 and the second compressor 8 are both started, the first pipeline switching switch 9 and the second pipeline switching switch 10 are both switched to the b position to connect with the second heat exchange channel of the heat storage tank 5, the third pipeline switching switch 11 and the fourth pipeline switching switch 12 are both switched to the a position to connect with the inner pipe, which reduces the working section length of the ground source pipe well 13 relative to the outer pipe, so as to reduce the heat energy consumption of the ground source pipe well 13. At this time, the PV / T photovoltaic panel 1 can provide domestic water for the user, and the heat of the PV / T photovoltaic panel 1 is transferred to the heat storage tank 5, the first multifunctional heat exchanger 6 is switched to the evaporation mode, and the heat of the heat storage tank 5 and the ground source pipe well 13 is absorbed through the evaporation process, and the heat is transferred to the second multifunctional heat exchanger 7 through the internal circulation pipeline, and the second multifunctional heat exchanger 7 is switched to the condensation mode, and the heat released in the condensation process is transferred to the user's ground radiation pipeline.

[0018] When the system is in the heat storage and cooling mode, the first compressor 3 and the second compressor 8 are both started, the first pipeline switching switch 9 and the second pipeline switching switch 10 are both switched to the b position to connect with the second heat exchange channel of the heat storage tank 5, the third pipeline switching switch 11 and the fourth pipeline switching switch 12 are both switched to the b position to connect with the outer pipe, and the working section length of the ground source pipe well 13 is increased relative to the inner pipe to increase the thermal energy storage capacity of the ground source pipe well 13. At this time, the PV / T photovoltaic panel 1 can provide domestic water for users, and the heat of the PV / T photovoltaic panel 1 is transferred to the heat storage tank 5, the first multifunctional heat exchanger 6 is switched to the condensation mode, and the heat of the second multifunctional heat exchanger 7 is absorbed through the internal circulation pipeline, and the heat released in the condensation process is transferred to the heat storage tank 5 and the ground source pipe well 13 for storage, and the second multifunctional heat exchanger 7 is switched to the evaporation mode, and the heat of the user's ground radiation pipeline is absorbed through the evaporation process.

[0019] When the system is in the heating supplement mode, the first compressor 3 and the second compressor 8 both stop running, the first pipeline switching switch 9 and the second pipeline switching switch 10 are both switched to the a position, respectively connected to the second liquid inlet and the second liquid outlet of the PV / T photovoltaic panel 1, and the third pipeline switching switch 11 and the fourth pipeline switching switch 12 are both switched to the b position and connected to the outer pipe, which increases the working section length of the ground source pipe well 13 relative to the inner pipe to increase the thermal energy storage of the ground source pipe well 13. At this time, the PV / T photovoltaic panel 1 can provide domestic water for users, and the heat of the PV / T photovoltaic panel 1 is transferred to the ground source pipe well 13 for storage.

[0020] The present invention can effectively utilize renewable energy, provide multiple service modes, improve energy efficiency, and reduce user energy costs. It has the advantages of simple structure, flexible control, and stable operation. The switching between various operating modes is comprehensively considered based on changes in ambient temperature, user load, and soil temperature.

Claims

1. A solar photovoltaic heat and underground pipe heat exchange dual-system integrated air conditioning system, characterized in that: The invention comprises a PV / T photovoltaic panel (1), a heat storage tank (5), a ground source pipe well (13) and two groups of heat exchanger components, wherein one group of heat exchanger components comprises an evaporating heat exchanger (2) and a condensing heat exchanger (4), and the internal circulation heat exchange channels of the evaporating heat exchanger (2) and the condensing heat exchanger (4) are both connected to an internal circulation pipeline provided with a first compressor (3), so that the evaporating heat exchanger (2) and the condensing heat exchanger (4) can perform cyclic heat exchange; the other group of heat exchanger components comprises a first multifunctional heat exchanger (6) and a second multifunctional heat exchanger (7), and the two multifunctional heat exchangers can switch between an evaporating mode and a condensing mode, and the internal circulation heat exchange channels of the two multifunctional heat exchangers are both connected to an internal circulation pipeline provided with a second compressor (8), so that the two multifunctional heat exchangers can perform cyclic heat exchange; The two interfaces of the external circulation heat exchange channel of the second multifunctional heat exchanger (7) are respectively connected to the inlet and outlet of the user's ground radiation pipeline; the PV / T photovoltaic panel (1) comprises a photovoltaic cell panel on the surface layer and a cooling channel pipe on the bottom layer, and the cooling channel pipe is respectively provided with two liquid inlets and two liquid outlets, wherein the first liquid inlet and the first liquid outlet are respectively connected to the inlet and outlet of the user's domestic hot water pipeline; the first liquid inlet and the first liquid outlet are also respectively connected to the inlet and outlet of the external circulation heat exchange channel of the evaporative heat exchanger (2), and the inlet and outlet of the external circulation heat exchange channel of the condensing heat exchanger (4) are respectively connected to the inlet and outlet of the first heat exchange channel of the heat storage tank (5); The ground source pipe well (13) has an underground pipeline, two inner pipes and two outer pipes are connected to the underground pipeline, the length of the underground pipeline between the two inner pipes is less than the length of the underground pipeline between the two outer pipes, the outlet ends of the inner pipes and the outer pipes on the same side are provided with a fourth pipeline switching switch (12), and the outlet ends of the inner pipes and the outer pipes on the other side are provided with a third pipeline switching switch (11), the pipeline switching switch can be switched to connect to one of the inner pipes or the outer pipes, the fourth pipeline switching switch (12) is also connected to the second pipeline switching switch (10), and the second pipeline The switching switch (10) can be switched to be connected to the second liquid outlet of the PV / T photovoltaic panel (1) or the outlet of the second heat exchange channel of the heat storage tank (5); the third pipeline switching switch (11) is also connected to the inlet of the external circulation heat exchange channel of the first multifunctional heat exchanger (6); the outlet of the external circulation heat exchange channel of the first multifunctional heat exchanger (6) is connected to the first pipeline switching switch (9); and the first pipeline switching switch (9) can be switched to be connected to the second liquid inlet of the PV / T photovoltaic panel (1) or the inlet of the second heat exchange channel of the heat storage tank (5); The system is also connected to a controller or an external control system, which can automatically control or manually control the operating mode of the system, including heating mode, heat storage cooling mode and supplementary heating mode; When the system is in heating mode, the first compressor (3) and the second compressor (8) are both started, the first pipeline switching switch (9) and the second pipeline switching switch (10) are both switched to connect to the second heat exchange channel of the heat storage tank (5), the third pipeline switching switch (11) and the fourth pipeline switching switch (12) are both switched to connect to the inner pipe, so that domestic water is provided to the user through the PV / T photovoltaic panel (1), and the heat of the PV / T photovoltaic panel (1) is transferred to the heat storage tank (5), the first multifunctional heat exchanger (6) is switched to evaporation mode, absorbs heat from the heat storage tank (5) and the ground source pipe well (13) through the evaporation process, and transfers the heat to the second multifunctional heat exchanger (7) through the internal circulation pipeline, and the second multifunctional heat exchanger (7) is switched to condensation mode, and transfers the heat released in the condensation process to the ground radiation pipeline of the user; When the system is in the heat storage cooling mode, the first compressor (3) and the second compressor (8) are both started, the first pipeline switching switch (9) and the second pipeline switching switch (10) are both switched to connect with the second heat exchange channel of the heat storage tank (5), the third pipeline switching switch (11) and the fourth pipeline switching switch (12) are both switched to connect with the external pipe, so that domestic water is provided to the user through the PV / T photovoltaic panel (1), and the heat of the PV / T photovoltaic panel (1) is transferred to the heat storage tank (5), the first multifunctional heat exchanger (6) is switched to the condensation mode, and the heat of the second multifunctional heat exchanger (7) is absorbed through the internal circulation pipeline, and the heat released in the condensation process is transferred to the heat storage tank (5) and the ground source pipe well (13) for storage, and the second multifunctional heat exchanger (7) is switched to the evaporation mode, and the heat of the user's ground radiation pipeline is absorbed through the evaporation process; When the system is in the heating supplement mode, the first compressor (3) and the second compressor (8) both stop running, the first pipeline switching switch (9) and the second pipeline switching switch (10) are respectively switched to be connected to the second liquid inlet and the second liquid outlet of the PV / T photovoltaic panel (1), and the third pipeline switching switch (11) and the fourth pipeline switching switch (12) are both switched to be connected to the external pipe, thereby providing domestic water for users through the PV / T photovoltaic panel (1), and transferring the heat of the PV / T photovoltaic panel (1) to the ground source pipe well (13) for storage.

2. According to claim 1, a solar photovoltaic heat and underground pipe heat exchange dual-system integrated air conditioning system is characterized by: A second throttle valve (15) is installed on the internal circulation pipeline provided with the first compressor (3), and a first throttle valve (14) is installed on the internal circulation pipeline provided with the second compressor (8).

3. The solar photovoltaic heat and underground pipe heat exchange dual-system integrated air conditioning system according to claim 1 is characterized by: The power generation circuit of the PV / T photovoltaic panel (1) can supply power to the system.

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