A PVT-based heat pump system for producing hot water

Abstract

This utility model belongs to the field of new energy technology, specifically a PVT (Polyhydrodynamic Transformer) heat pump-based hot water system. It includes a compressor, a domestic hot water shell-and-tube heat exchanger, a four-way reversing valve, a gas-liquid separator, a PV / T source-side circulating water pump, an insulated water tank, a PV / T hot water exchange pump, a PV / T photovoltaic thermal panel, and a spiral tube heat exchanger. The compressor is connected at both ends to the domestic hot water shell-and-tube heat exchanger and the gas-liquid separator, respectively. This utility model utilizes solar energy to generate electricity, using the power generated by the solar photovoltaic thermal system to supply the system or power users' daily needs. This reduces the system's reliance on traditional grid electricity and the coal combustion required for thermal power generation, significantly reducing environmental pollution. The heat is transferred to the photovoltaic thermal panel through a plate heat exchanger, thereby lowering the panel's temperature and improving photovoltaic power generation efficiency. The system can produce hot water to meet the user's hot water needs.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a hot water system based on a PVT heat source and water source heat pump. Background Technology

[0002] Currently, buildings require significant amounts of energy for heating, air conditioning, lighting, and electricity use, with cooling and heating consuming the largest share. As global emphasis on environmental protection and sustainable development grows, the application of renewable energy in the building sector will become increasingly widespread. Global environmental issues have made reducing buildings' energy demands a crucial topic. By adopting energy-saving technologies, promoting sustainable building materials, and developing renewable energy, we can reduce building energy consumption and environmental impact, thus promoting sustainable energy development.

[0003] Currently, the application of solar low-temperature hot water systems and solar photovoltaic power generation systems has developed rapidly. In some regions, the economic benefits and energy-saving effects of domestic solar hot water systems have already become apparent. While stand-alone and grid-connected photovoltaic power generation systems are technically relatively mature...

[0004] However, current photovoltaic and solar thermal systems are susceptible to instability due to climate change and day-night cycles, which can affect daily life. Furthermore, high temperatures in photovoltaic and solar thermal systems can lead to a decrease in photoelectric conversion efficiency. On the other hand, air source heat pumps also suffer from performance degradation due to a drop in ambient temperature. Utility Model Content

[0005] The purpose of this invention is to address the problems mentioned in the background art, such as the decrease in photoelectric conversion efficiency caused by high temperature in photovoltaic and photothermal systems, and the performance degradation of air source heat pumps due to ambient temperature drops. The invention proposes a water heating system based on a PVT heat source and a water source heat pump.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A water source heat pump system based on a PVT heat source includes a compressor, a domestic hot water shell-and-tube heat exchanger, a four-way reversing valve, a gas-liquid separator, a PV / T source-side circulating water pump, an insulated water tank, a PV / T heat exchanger pump, a PV / T photovoltaic thermal panel, and a spiral tube heat exchanger. The compressor is connected at both ends to the domestic hot water shell-and-tube heat exchanger and the gas-liquid separator, respectively. The domestic hot water shell-and-tube heat exchanger and the gas-liquid separator are connected via the four-way reversing valve. The gas-liquid separator is connected to the PV / T heat source-side plate heat exchanger. The PV / T heat source-side plate heat exchanger is connected at both ends to the PV / T source-side circulating water pump and the insulated water tank, respectively. The PV / T photovoltaic thermal panel is connected to both the PV / T heat exchanger pump and the spiral tube heat exchanger.

[0008] Preferably, a solenoid valve and a thermal expansion valve are provided between the vapor-liquid separator and the PV / T heat source side plate heat exchanger.

[0009] Preferably, a temperature sensor is connected to the thermostatic expansion valve.

[0010] Preferably, a filter is connected to the input end of the gas-liquid separator.

[0011] Preferably, the spiral tube heat exchanger is installed inside an insulated water tank.

[0012] Preferably, the medium in the PV / T photovoltaic thermal panel, PV / T hot water pump, and spiral tube heat exchanger piping system is antifreeze.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention utilizes solar energy to generate electricity. The electricity generated by the solar photovoltaic thermal system can power the system or the daily needs of users, reducing the system's reliance on traditional grid electricity and the need for coal combustion in thermal power generation, thus significantly reducing environmental pollution. The heat is transferred through a plate heat exchanger, thereby lowering the temperature of the photovoltaic thermal panels, improving photovoltaic power generation efficiency, and enabling the system to produce hot water to meet the hot water needs of users.

[0015] In this invention, the temperature of the photovoltaic thermal plate is detected, and the heat of the photovoltaic thermal plate is transferred using a shell-and-tube heat exchanger to avoid the problem of reduced photoelectric conversion efficiency due to excessive temperature. At the same time, the heat from the photovoltaic thermal water is used to heat the hot water tank at the user end. Compared with the air heat source heat pump water heating system, this system has higher hot water production performance and significant energy saving effect.

[0016] This utility model system combines multiple energy-saving technologies and integrates hot water production and power generation functions into one integrated device, improving the utilization rate of the equipment. This device has intelligent centralized control, allowing users to control it according to their needs. It has a high degree of intelligence and is easy to operate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a PVT heat source water source heat pump hot water system proposed in this utility model.

[0018] In the diagram: 1. Compressor; 2. Gas-liquid separator; 3. Domestic hot water shell-and-tube heat exchanger; 4. Four-way reversing valve; 5. PV / T heat source side plate heat exchanger; 6. Temperature sensor; 7. Thermal expansion valve; 8. Solenoid valve; 9. Gas-liquid separator; 10. Filter; 11. PV / T source-side circulating water pump; 12. Insulated water tank; 13. PV / T hot water exchange pump; 14. PV / T photovoltaic thermal panel; 15. Spiral tube heat exchanger. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1 A heat pump system for producing hot water based on a PVT heat source includes a compressor 1, a shell-and-tube heat exchanger for domestic hot water 3, a four-way reversing valve 4, a gas-liquid separator 2, a PV / T source-side circulating water pump 11, an insulated water tank 12, a PV / T hot water pump 13, a PV / T photovoltaic thermal panel 14, and a spiral tube heat exchanger 15.

[0021] In this embodiment, the two ends of the compressor 1 are connected to the domestic hot water shell-and-tube heat exchanger 3 and the gas-liquid separator 2, respectively; the domestic hot water shell-and-tube heat exchanger 3 and the gas-liquid separator 9 are connected through a four-way reversing valve 4, and the gas-liquid separator 9 is connected to the PV / T heat source side plate heat exchanger 5.

[0022] In this embodiment, a filter 10 is connected to the input end of the gas-liquid separator 9, and a solenoid valve 8 and a thermal expansion valve 7 are provided between the gas-liquid separator 9 and the PV / T heat source side plate heat exchanger 5. A temperature sensor 6 is connected to the thermal expansion valve 7, and the thermal expansion valve 7 performs its action according to the temperature sensor 6.

[0023] In this embodiment, the two ends of the PV / T heat source side plate heat exchanger 5 are respectively connected to the PV / T source side circulating water pump 11 and the heat preservation water tank 12, and the PV / T photovoltaic thermal plate 14 is respectively connected to the PV / T heat exchange water pump 13 and the spiral tube heat exchanger 15.

[0024] In this embodiment, the spiral tube heat exchanger 15 is installed inside the insulated water tank 12, and the medium in the pipeline system of the photovoltaic thermal panel 14, the PV / T hot water pump 14 and the spiral tube heat exchanger 15 is antifreeze.

[0025] In this embodiment, the process of the PV / T source heat pump hot water system is as follows: when the temperature of the PV / T photovoltaic thermal panel is detected to be higher than that of the insulated water tank 12, the PV / T hot water pump is started, and the heat of the PV / T photovoltaic thermal panel is recovered through antifreeze, and then the cold water in the insulated water tank is heated through the spiral tube heat exchanger; the PV / T source heat pump starts the hot water production mode, first the PV / T source side circulating water pump 11; when the temperature of the hot water tank is lower than the set value, the refrigerant flows through the compressor 1, and sequentially through the domestic hot water shell and tube heat exchanger 3, the four-way valve 4, the PV / T heat source side plate heat exchanger 2, the vapor-liquid separator 9, the solenoid valve 8, the thermal expansion valve 7, and the PV / T heat source side plate heat exchanger 5, and returns to the compressor 1.

[0026] In this embodiment, the system can use the electricity generated by the solar photovoltaic and solar thermal system to power the system operation or the daily needs of users by turning on the inverter and bidirectional meter in different modes.

[0027] In this embodiment, solar power generation is utilized. The electricity generated by the solar photovoltaic thermal system can be used to power the system or the daily needs of users, reducing the system's reliance on traditional grid electricity and the need for coal combustion in thermal power generation, thus significantly reducing environmental pollution. Heat is transferred from the photovoltaic thermal panels through a plate heat exchanger, thereby lowering the temperature of the photovoltaic thermal panels, improving photovoltaic power generation efficiency, and enabling the system to produce hot water to meet the hot water needs of users.

[0028] In this embodiment, the temperature of the photovoltaic thermal panel is detected, and the heat of the photovoltaic thermal panel is transferred using a shell-and-tube heat exchanger to avoid the problem of excessive temperature leading to a decrease in photoelectric conversion efficiency. At the same time, the heat from the photovoltaic thermal water is used to heat the hot water tank at the user end. Compared with the air heat source heat pump water heating system, this system has higher hot water production performance and significant energy-saving effect.

[0029] In this embodiment, the system combines multiple energy-saving technologies and integrates hot water production and power generation functions into one integrated device, which improves the utilization rate of the device. This device has intelligent centralized control, which allows users to control it according to their needs. It has a high degree of intelligence and is easy to operate.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A PVT-based heat pump system for producing hot water, comprising a compressor (1), a shell-and-tube heat exchanger for domestic hot water (3), a four-way reversing valve (4), a gas-liquid separator (2), a PV / T source-side circulating water pump (11), an insulated water tank (12), a PV / T hot water pump (13), a PV / T photovoltaic thermal panel (14), and a spiral tube heat exchanger (15), characterized in that: The compressor (1) is connected to the shell-and-tube heat exchanger (3) and the gas-liquid separator (2) at both ends respectively; the shell-and-tube heat exchanger (3) and the gas-liquid separator (9) are connected by a four-way reversing valve (4); the gas-liquid separator (9) is connected to the PV / T heat source side plate heat exchanger (5); the PV / T heat source side plate heat exchanger (5) is connected to the PV / T source side circulating water pump (11) and the insulated water tank (12) at both ends respectively; the PV / T photovoltaic thermal plate (14) is connected to the PV / T hot water pump (13) and the spiral tube heat exchanger (15) respectively.

2. The water heating system based on a PVT heat source and a water source heat pump according to claim 1, characterized in that: A solenoid valve (8) and a thermal expansion valve (7) are provided between the vapor-liquid separator (9) and the PV / T heat source side plate heat exchanger (5).

3. The PVT heat source water source heat pump hot water system according to claim 2, characterized in that: A temperature sensor (6) is connected to the thermostatic expansion valve (7).

4. The PVT heat source water source heat pump hot water system according to claim 1, characterized in that: The input end of the vapor-liquid separator (9) is connected to a filter (10).

5. The PVT heat source water source heat pump hot water system according to claim 1, characterized in that: The spiral tube heat exchanger (15) is installed inside the insulated water tank (12).

6. The PVT heat source water source heat pump hot water system according to claim 5, characterized in that: The medium in the pipeline system of the PV / T photovoltaic thermal plate (14), PV / T hot water pump (13) and spiral tube heat exchanger (15) is antifreeze.

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