Novel PVT-air source double-source heat pump system

Abstract

The utility model discloses a novel PVT-air source double-source heat pump system, and relates to the technical field of heat pumps. Comprising a PVT assembly, an ice storage box, an air-anti-freezing solution heat exchanger, a water source heat pump unit, a plate heat exchanger, an energy storage water tank, an air conditioner terminal and a circulation pipeline. The water source heat pump unit is divided into an evaporator side and a condenser side, the evaporator side is connected with the PVT assembly, the air-anti-freezing liquid heat exchanger and the ice storage box in parallel through a circulation pipeline, and the condenser side is connected with the plate heat exchanger. The PVT assembly is further connected with the ice storage box through a circulation pipeline, the ice storage box is further connected with the air-anti-freezing solution heat exchanger through a circulation pipeline, one side of the plate heat exchanger is connected with the ice storage box through a circulation pipeline, and the other side of the plate heat exchanger is connected with the energy storage water tank or the air conditioner terminal through a circulation pipeline. The energy storage water tank is connected with the air conditioner terminal through a circulation pipeline. According to the utility model, the operation cost is obviously reduced, the problem of time discontinuity of renewable energy sources is solved through multi-energy complementation, and stable and efficient building energy supply is ensured.

Description

Technical Field

[0001] This utility model relates to the field of heat pump technology, and in particular to a novel PVT-air source dual-source heat pump system. Background Technology

[0002] Solar energy and air source heat pumps are emerging renewable energy sources that have gained popularity in recent years. Due to their environmental friendliness, renewability, and widespread availability, they occupy an important position in the utilization of new energy sources in buildings. However, as their application expands, their drawbacks are becoming increasingly apparent. For example, increased panel temperature reduces photovoltaic efficiency, the stability of solar energy use is limited, and air source heat pumps suffer from problems such as frosting, severely impacting operational performance.

[0003] Therefore, proposing a novel PVT-air source dual-source heat pump system to solve the difficulties existing in the prior art is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a novel PVT-air source dual-source heat pump system, which significantly reduces operating costs and overcomes the problem of discontinuous renewable energy time through multi-energy complementarity, ensuring stable and efficient building energy supply.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A novel PVT-air source dual-source heat pump system includes PVT components, a refrigerator, an air-antifreeze heat exchanger, a water source heat pump unit, a plate heat exchanger, an energy storage tank, air conditioning terminals, and circulation pipelines.

[0007] The water source heat pump unit is divided into an evaporator side and a condenser side. The evaporator side is connected in parallel to the PVT module, air-antifreeze heat exchanger and storage refrigerator through a circulation pipeline. The condenser side is connected to a plate heat exchanger.

[0008] The PVT assembly is also connected to the refrigerator via a circulation pipeline, which in turn is connected to the air-antifreeze heat exchanger via a circulation pipeline. One side of the plate heat exchanger is connected to the refrigerator via a circulation pipeline, and the other side is connected to the energy storage tank or air conditioning terminal via a circulation pipeline. The energy storage tank is connected to the air conditioning terminal via a circulation pipeline.

[0009] Optionally, the PVT module includes a photovoltaic cell layer and a heat collection layer. The photovoltaic cell layer is made of monocrystalline silicon or polycrystalline silicon solar panels, and the heat collection layer includes flat heat pipes and multi-channel flat tubes.

[0010] Optionally, one side of the flat heat pipe is attached to the back plate of the PVT module as the evaporation section, and the other side is attached to the multi-channel flat tube as the condensation section.

[0011] Flat plate heat pipes are flat heat conductors with porous structures formed by extruding metal materials. They have multiple non-interconnected channels arranged side by side inside. Multi-channel flat tubes are flat pipes made of extruded metal. The two ends inside are converging channels, and between the converging channels are multiple square or rectangular branch channels arranged side by side. The internal fluid is water or antifreeze.

[0012] Optionally, the refrigerator is equipped with a multi-channel flat tube heat exchanger with a rectangular cross-section. Water or ethylene glycol solution flows inside the tube, and aluminum closed rectangular fins are installed on the outside. The energy storage medium is water.

[0013] Optionally, the air-antifreeze heat exchanger can be a finned tube structure.

[0014] Optionally, the plate heat exchanger adopts a corrugated plate structure.

[0015] Optionally, the energy storage tank has an open structure with a water inlet at the top.

[0016] As can be seen from the above technical solution, compared with the prior art, this utility model provides a novel PVT-air source dual-source heat pump system, which has the following beneficial effects: 1) This utility model innovatively integrates the photovoltaic and photothermal utilization of solar energy, air source heat pump technology and phase change energy storage technology, realizing the efficient synergistic utilization of multiple energy sources. The PVT module efficiently collects solar thermal energy while generating electricity. The air-antifreeze heat exchanger provides the system with an appropriate heat source or cold source according to seasonal operating conditions. The refrigerator and the energy storage tank work together to complete the storage and regulation of system energy, greatly reducing energy waste and significantly improving the overall energy utilization efficiency of the system; 2) This utility model applies phase change energy storage technology, enabling the system to effectively cope with the problem of energy output fluctuation caused by changes in natural conditions. In severe winter weather, the refrigerator, as a stable low-temperature heat source, ensures that the heat pump evaporator maintains a high temperature and maintains the system's heating stability. In summer, the cold storage function ensures the continuity of the cooling system, greatly improving the stability and reliability of the system operation, ensuring the stability of the building's energy supply, and effectively reducing the adverse effects of unstable energy supply on the normal operation of the building; 3) This utility model uses renewable and clean energy such as solar energy and air energy as the main energy input, significantly reducing the dependence on traditional fossil energy, which is in line with the global green and low-carbon development trend, and is of great significance to promoting energy conservation, emission reduction and sustainable development in the building field, helping buildings achieve green star rating standards; 4) This utility model uses an electric three-way valve to intelligently switch and control the multi-channel circuit of the water source heat pump unit. The system can flexibly and efficiently adjust the operating mode according to different seasons, different environmental conditions and the actual load demand of the building. Whether it is the extreme low temperature in winter in cold regions, the high temperature in summer, or the diversified energy demand of different building types, it can show strong environmental adaptability and operating condition adjustment capability, and can be widely used in different climate regions. The energy supply scenarios for different types of buildings have broad market application prospects; 5) This utility model can effectively reduce peak electricity load to achieve "peak shaving". By making reasonable use of the price difference of electricity at different times, energy storage operation is carried out during the low electricity price period, and the stored energy is used to supply energy during the peak period, thereby greatly reducing the system operating cost, having significant economic benefits, and enhancing the system's competitiveness in the market; 6) This utility model ensures that the air source heating system does not frost: When the traditional air source heat pump system is heating, the evaporator is prone to frost when the ambient temperature is low. After frost, the heating efficiency decreases. When the frost layer reaches a certain thickness, not only does it need to stop heating, but it also needs to consume additional energy for defrosting. This is the biggest technical bottleneck of the traditional air source heat pump system; The air source heating system of this utility model, because the temperature of the air side must be higher than the freezing point temperature when the air-antifreeze heat exchanger absorbs air energy in order to melt the ice in the refrigerator for heat storage, the air-antifreeze heat exchanger never frosts, and is especially suitable for areas with high humidity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 A schematic diagram of a novel PVT-air source dual-source heat pump system provided by this utility model;

[0019] Figure 2 A structural diagram of the PVT component provided by this utility model;

[0020] Figure 3 This utility model provides an internal structural diagram of a refrigerator.

[0021] Among them, 1 is a PVT module, 2 is a refrigerator, 3 is an air-antifreeze heat exchanger, 4 is a water source heat pump unit, 5 is a plate heat exchanger, 6 is an energy storage tank, 7 is an air conditioning terminal, 8-12 are water pumps, 13-31 are solenoid valves; 101 is a photovoltaic backsheet, 102 is a multi-channel flat tube, 103 is a flat plate heat pipe; 201 is a multi-channel flat tube heat exchanger, and 202 is a closed rectangular fin. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1 As shown, this utility model discloses a novel PVT-air source dual-source heat pump system, including a PVT component 1, a refrigerator 2, an air-antifreeze heat exchanger 3, a water source heat pump unit 4, a plate heat exchanger 5, an energy storage tank 6, an air conditioning terminal 7, and a circulation pipeline.

[0024] The water source heat pump unit 4 is divided into an evaporator side and a condenser side. The evaporator side is connected in parallel to the PVT component 1, the air-antifreeze heat exchanger 3 and the storage refrigerator 2 through a circulation pipeline. The condenser side is connected to the plate heat exchanger 5.

[0025] PVT component 1 is also connected to refrigerator 2 via a circulation pipeline. Refrigerator 2 is also connected to air-antifreeze heat exchanger 3 via a circulation pipeline. Plate heat exchanger 5 is connected to refrigerator 2 on one side via a circulation pipeline and to energy storage tank 6 or air conditioning terminal 7 on the other side via a circulation pipeline. Energy storage tank 6 is connected to air conditioning terminal 7 via a circulation pipeline.

[0026] Furthermore, refer to Figure 2 As shown, the PVT module 1 includes a photovoltaic cell layer and a heat collection layer. The photovoltaic cell layer is made of monocrystalline silicon or polycrystalline silicon solar panels, and the heat collection layer includes a flat heat pipe 103 and a multi-channel flat tube 102.

[0027] Furthermore, one side of the flat heat pipe 103 is attached to the photovoltaic backsheet 101 of the PVT module 1 as an evaporation section, and the other side is attached to the multi-channel flat tube 102 as a condensation section.

[0028] The flat heat pipe 103 is a flat heat conductor with a porous structure formed by extrusion of metal material, and has multiple non-connected channels arranged side by side inside; the multi-channel flat tube 102 is a flat pipe formed by extrusion of metal, with converging channels at both ends inside, and multiple square or rectangular branch channels arranged side by side between the converging channels, and the internal fluid is water or antifreeze.

[0029] Specifically, the photovoltaic cell layer is used for photoelectric conversion, and the surface of the monocrystalline silicon or polycrystalline silicon solar panel is covered with a reflective coating. The output power is connected to the room for power supply through an inverter.

[0030] The heat collection layer is used for solar thermal collection, the evaporation section absorbs the waste heat of the photovoltaic layer, and the condensation section transfers heat to the circulating working fluid through the multi-channel flat tube 102. The flow rate of the working fluid is regulated by a water pump to ensure that the temperature of the photovoltaic layer is ≤45℃ and the photoelectric efficiency is increased to more than 18%.

[0031] Furthermore, the water source heat pump unit 4 has a multi-source switching mechanism:

[0032] Multiple heat sources in parallel on the evaporator side: The heat source is selected by an electric three-way valve, including the latent heat of phase change released by the solar PVT module 1, the air-to-air-antifreeze heat exchanger 3, and the refrigerator 2.

[0033] Condensing side load matching: The plate heat exchanger 5 and the energy storage tank 6 are controlled by a solenoid valve, which can switch between direct supply, energy storage or energy release modes according to user needs.

[0034] Furthermore, the refrigerator 2 is equipped with a multi-channel flat tube heat exchanger 201. The flat tube has a rectangular cross-section and is circulated with water or ethylene glycol solution. It is equipped with aluminum closed rectangular fins on the outside and the energy storage medium is water.

[0035] Specifically, refer to Figure 3As shown, the refrigerator 2 has a phase change energy storage design, and its internal multi-channel flat tube heat exchanger 201 serves as a cold / heat storage unit; by switching the connection with the PVT component 1 and the air-antifreeze heat exchanger 3 through the solenoid valve, dynamic energy storage control is achieved, which can store heat during the day, release heat at night, or store cold during off-peak electricity price periods.

[0036] Furthermore, the air-antifreeze heat exchanger 3 adopts a finned tube structure.

[0037] Furthermore, the plate heat exchanger 5 adopts a corrugated plate structure made of stainless steel.

[0038] Furthermore, the energy storage tank 6 has an open structure with a water inlet at the top.

[0039] Furthermore, the circulation pipeline also includes a water pump and a solenoid valve, and the internal circulating working fluid is an ethylene glycol solution.

[0040] In one specific embodiment, the PVT-air source dual-source frost-free heat pump system has a winter heating mode and a summer heating mode.

[0041] The winter heating mode includes: the water source heat pump unit 4 as the main cold and heat source equipment, and the heat sources during heating are solar energy, air energy and the latent heat of water in the refrigerator 2.

[0042] Using solar energy as a low-temperature heat source, the fluid sequentially passes through solenoid valve 18, solenoid valve 19, water pump 8, PVT component 1, solenoid valve 14, solenoid valve 15, and solenoid valve 20 before returning to the evaporator of the heat pump; using air energy as a low-temperature heat source, the fluid sequentially passes through water pump 9, solenoid valve 16, air-antifreeze heat exchanger 3, and solenoid valve 20 before returning to the evaporator of the heat pump; using a refrigerator 2 as a low-temperature heat source, the fluid sequentially passes through water pump 9, solenoid valve 17, refrigerator 2, solenoid valve 13, solenoid valve 14, solenoid valve 15, and solenoid valve 20 before returning to the evaporator of the heat pump; the fluid on the condenser side of the heat pump returns to the condenser of the heat pump via water pump 10, plate heat exchanger 5, solenoid valve 24, and solenoid valve 22.

[0043] Based on the user's heating needs and the heat storage capacity of the energy storage tank 6, the user side can use three modes: direct heat pump supply, energy storage tank heat storage, and energy storage tank heating. In the direct heat pump supply mode, the fluid sequentially passes through solenoid valve 28, water pump 12, air conditioning terminal 7, solenoid valve 29, and solenoid valve 26 before returning to the plate heat exchanger 5. In the energy storage tank heat storage mode, the fluid sequentially passes through water pump 11, energy storage tank 6, solenoid valve 27, and solenoid valve 26 before returning to the plate heat exchanger 5. In the energy storage tank heating mode, the fluid sequentially passes through solenoid valve 31, water pump 12, air conditioning terminal 7, and solenoid valve 30 before returning to the energy storage tank 6.

[0044] During the day, the refrigerator 2 can collect solar energy and air energy. The collected solar energy fluid returns to the refrigerator 2 via solenoid valve 19, water pump 8, PVT component 1, and solenoid valve 13; the collected air energy fluid returns to the refrigerator 2 via solenoid valve 18, water pump 9, solenoid valve 16, air-antifreeze heat exchanger 3, solenoid valve 15, solenoid valve 14, and solenoid valve 13.

[0045] Summer heating mode includes: When the water source heat pump unit 4 is cooling, the heat source is air energy and fluid passes through water pump 9, solenoid valve 16, air-antifreeze heat exchanger 3, solenoid valve 20 and then returns to the condenser of the heat pump.

[0046] Depending on the user's cooling needs and cold storage requirements, there are four modes: direct heat pump supply, cold storage tank, cold storage tank supply, cold storage refrigerator, and cold storage refrigerator supply. In the direct heat pump supply mode, the fluid sequentially passes through solenoid valve 28, water pump 12, air conditioning terminal 7, solenoid valve 29, and solenoid valve 26 before returning to the plate heat exchanger 5. The fluid on the heat pump evaporator side passes through water pump 10, plate heat exchanger 5, solenoid valve 24, and solenoid valve 22 before returning to the heat pump evaporator. In the cold storage tank mode, the fluid sequentially passes through water pump 11, cold storage tank 6, solenoid valve 27, and solenoid valve 26 before returning to the plate heat exchanger 5. The fluid on the evaporator side of the heat pump returns to the evaporator of the heat pump via water pump 10, plate heat exchanger 5, solenoid valve 24, and solenoid valve 22. In the energy storage tank cooling mode, the fluid returns to the energy storage tank 6 via solenoid valve 31, water pump 12, air conditioning terminal 7, and solenoid valve 30. In the refrigerator cooling mode, the fluid returns to the evaporator of the heat pump via water pump 10, solenoid valve 25, solenoid valve 21, refrigerator 2, solenoid valve 13, solenoid valve 14, and solenoid valve 22. In the refrigerator cooling mode, the fluid returns to the plate heat exchanger 5 via solenoid valve 24, solenoid valve 14, solenoid valve 13, refrigerator 2, solenoid valve 21, solenoid valve 23, and water pump 10. The user-side fluid returns to the plate heat exchanger 5 via solenoid valve 28, water pump 12, air conditioning terminal 7, solenoid valve 29, and solenoid valve 26.

[0047] Furthermore, in the heating mode, the evaporator is the refrigerator 2, and the heat of evaporation is the latent heat of phase change of water in the refrigerator 2 into ice. The heat for the ice to regenerate into water is provided by the PVT component 1 and the air source.

[0048] The above description of the disclosed embodiments is presented in a progressive manner to enable those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A novel PVT-air source dual-source heat pump system, characterized in that, It includes PVT components (1), a refrigerator (2), an air-antifreeze heat exchanger (3), a water source heat pump unit (4), a plate heat exchanger (5), an energy storage tank (6), an air conditioning terminal (7), and circulation pipelines; The water source heat pump unit (4) is divided into an evaporator side and a condenser side. The evaporator side is connected in parallel to the PVT component (1), the air-antifreeze heat exchanger (3) and the storage refrigerator (2) through the circulation pipeline. The condenser side is connected to the plate heat exchanger (5). The PVT component (1) is also connected to the refrigerator (2) via a circulation pipeline. The refrigerator (2) is also connected to the air-antifreeze heat exchanger (3) via a circulation pipeline. One side of the plate heat exchanger (5) is connected to the refrigerator (2) via a circulation pipeline, and the other side is connected to the energy storage tank (6) or the air conditioning terminal (7) via a circulation pipeline. The energy storage tank (6) is connected to the air conditioning terminal (7) via a circulation pipeline.

2. The novel PVT-air source dual-source heat pump system according to claim 1, characterized in that, The PVT module (1) includes a photovoltaic cell layer and a heat collection layer. The photovoltaic cell layer is made of monocrystalline silicon or polycrystalline silicon. The heat collection layer includes a flat heat pipe (103) and a multi-channel flat tube (102).

3. A novel PVT-air source dual-source heat pump system according to claim 2, characterized in that, One side of the flat heat pipe (103) is attached to the photovoltaic backsheet (101) of the PVT module (1) as an evaporation section, and the other side is attached to the multi-channel flat tube (102) as a condensation section. The flat heat pipe (103) is a flat heat conductor with a porous structure formed by extrusion of metal material, and has multiple non-connected channels arranged side by side inside; the multi-channel flat tube (102) is a flat pipe made of metal extrusion, with two converging channels at both ends inside, and multiple square or rectangular branch channels arranged side by side between the converging channels, and the internal fluid is water or antifreeze.

4. The novel PVT-air source dual-source heat pump system according to claim 1, characterized in that, The refrigerator (2) is equipped with a multi-channel flat tube heat exchanger (201) with a rectangular cross section. Water or ethylene glycol solution flows inside, and aluminum closed rectangular fins (202) are installed on the outside. The energy storage medium is water.

5. A novel PVT-air source dual-source heat pump system according to claim 1, characterized in that, The air-antifreeze heat exchanger (3) adopts a finned tube structure.

6. A novel PVT-air source dual-source heat pump system according to claim 1, characterized in that, The plate heat exchanger (5) adopts a corrugated plate structure.

7. A novel PVT-air source dual-source heat pump system according to claim 1, characterized in that, The energy storage tank (6) has an open structure with a water inlet at the top.

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