CN217816950U - Heat pump heating system of phase-change energy-storage vacuum tube heat collector - Google Patents
Heat pump heating system of phase-change energy-storage vacuum tube heat collector Download PDFInfo
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- CN217816950U CN217816950U CN202221845610.8U CN202221845610U CN217816950U CN 217816950 U CN217816950 U CN 217816950U CN 202221845610 U CN202221845610 U CN 202221845610U CN 217816950 U CN217816950 U CN 217816950U
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Abstract
A heat pump heating system of a phase-change energy-storage vacuum tube heat collector. The heat supply system comprises a solar photovoltaic power generation set, a phase-change energy-storage vacuum tube heat collector, an inverter, a heat pump unit and a tail end heat load; the solar photovoltaic power generation set comprises a plurality of solar photovoltaic panels, all the solar photovoltaic panels are electrically connected to the inverter, and the inverter is electrically connected to the power grid; an evaporator is arranged on one side of the heat pump unit; the heat pump unit is electrically connected to the inverter; the phase-change energy-storage vacuum tube heat collector is arranged below the solar photovoltaic panel to absorb heat in high-temperature air at the bottom of the corresponding solar photovoltaic panel and heat circulating air to serve as a heat source at the evaporator side of the heat pump unit; the heat pump unit obtains electric energy from the inverter to produce high-temperature hot water and supplies the high-temperature hot water to the tail end heat load. The reliability and robustness of solar energy utilization are improved, and great contribution is made to improving the utilization rate of renewable energy sources, saving energy and reducing emission.
Description
Technical Field
The application relates to the technical field of heating systems, in particular to a heat pump heating system of a phase-change energy-storage vacuum tube heat collector.
Background
At present, a PVT (photovoltaic thermal power generation) cogeneration system realizes photovoltaic power generation and heat supply and mainly comprises three processes: solar photovoltaic power generation, photovoltaic board heating circulating water produce hot water as heat pump heat source and heat pump set because the circulating water heat transfer mechanism between photovoltaic board and the heat pump set is complicated, and the problem and the use restriction that exist are also more, mainly include:
1) The water pump drives the water circulation and consumes large energy. In order to promote heat exchange performance, circulating pipe's local pipe diameter is less, leads to the circulating resistance big and make circulating water pump energy consumption great, and the distance of heat pump unit and solar photovoltaic board is very big in the in-service use process, also can cause hydrologic cycle's resistance grow, further leads to the water pump energy consumption to improve.
2) The water system has high leakage probability. Along with the increase of the operation time, the water system is commonly leaked, overflowed and dripped, and the water body is softened and the medicine is added, so that the maintenance cost of the system is increased. In addition, when the conventional PVT system is used in severe cold or cold regions, once the system is stopped or solar radiation does not exist, the water system is very easy to be damaged due to freezing expansion and frost cracking accidents, so that an auxiliary heating device is required to be additionally arranged, and the use area is greatly limited.
3) The low temperature of the heat pump unit evaporator side leads to the failure of high temperature hot water production. Because the specific heat of water is large, the temperature rise after heat absorption from the solar panel is limited, if the heat pump unit produces high-temperature hot water, the pressure ratio of the compressor is increased, the COP (coefficient of performance) of the heat pump is seriously reduced, the energy absorbed by the photovoltaic side can be offset by the increased power consumption of the compressor, and the energy efficiency of the system is reduced. Therefore, the heat pump unit mainly produces medium-low temperature hot water and cannot meet the requirements of hot water at different temperatures.
SUMMERY OF THE UTILITY MODEL
The application provides a heat pump heating system of a phase-change energy storage vacuum tube heat collector, which is a high-efficiency renewable energy comprehensive utilization system, converts solar energy into electric energy and high-grade heat energy, meets the requirements of terminal electric energy and heat energy loads, simultaneously realizes the high-capacity and long-period energy storage of the solar energy, provides a new concept with a promising sustainable development mode for the high-efficiency comprehensive utilization of the solar energy, and is favorable for further promoting the deep coupling and the marketization energy flow of a distributed micro power grid and a heat supply network.
The embodiment of the application provides a heat pump heating system of a phase-change energy-storage vacuum tube heat collector, which comprises a solar photovoltaic power generation set, a phase-change energy-storage vacuum tube heat collector, an inverter, a heat pump set and a tail end heat load; the solar photovoltaic power generation set comprises a plurality of solar photovoltaic panels, all the solar photovoltaic panels are electrically connected to the inverter, and the inverter is electrically connected to the power grid; an evaporator is arranged on one side of the heat pump unit; the heat pump unit is electrically connected to the inverter; the phase-change energy-storage vacuum tube heat collector is arranged below the solar photovoltaic panel to absorb heat in high-temperature air at the bottom of the corresponding solar photovoltaic panel and heat circulating air to be used as a heat source at the evaporator side of the heat pump unit; the heat pump unit obtains electric energy from the inverter to produce high-temperature hot water and supplies the high-temperature hot water to the tail end heat load.
In some embodiments, a plurality of the phase-change energy-storage vacuum tube heat collectors are provided, and each phase-change energy-storage vacuum tube heat collector is correspondingly arranged at the bottom of one solar photovoltaic panel.
In some embodiments, the position of the phase-change energy-storage evacuated tube collector coincides with the position of the solar photovoltaic panel, or the area of the phase-change energy-storage evacuated tube collector is smaller than or equal to the area of the solar photovoltaic panel.
In some embodiments, the solar photovoltaic panels are arranged at intervals in an array.
In some embodiments, the phase change energy storage evacuated tube collector is provided with an air heating cavity and a phase change heat storage tube arranged in the air heating cavity, and the phase change heat storage tube is arranged along the extending direction of the air heating cavity.
In some embodiments, the phase-change heat storage pipe is an annular loop, and two ends of the phase-change heat storage pipe extend out of the air heating cavity and are arranged on the evaporator side of the heat pump unit.
In some embodiments, the phase change energy storage evacuated tube collector heat pump heating system further comprises a hot water tank; the heat pump unit is connected to the hot water tank through a pipeline.
In some embodiments, the terminal thermal load comprises at least one of a domestic hot water supply, a radiator, a floor heating, a fan coil, and an air conditioning unit.
In some embodiments, the inverter is also electrically connected to an electrical load.
In some embodiments, the heat pump unit is provided with an inverse Carnot cycle unit, and the heat pump unit generates hot water through the inverse Carnot cycle.
The heat pump heating system comprises a phase-change energy storage vacuum tube heat collector, a solar PVT heat and power cogeneration system, a heat pump unit and a tail end load, wherein the heat pump unit is used for generating heat by using solar photovoltaic power and supplying power to the tail end load after confluence and inversion, the phase-change energy storage vacuum tube heat collector absorbs heat at the bottom of a solar photovoltaic panel and supplies the heat to the evaporator side of the heat pump unit after heating circulating water, and the heat pump unit generates hot water through reverse Carnot circulation and supplies the hot water to a tail end heat user.
Through the combined heat and power system, the heat generated by the solar photovoltaic system can be fully utilized, especially in cold regions, the evaporation temperature of the heat pump can be effectively increased, the performance coefficient of the heat pump is increased, and therefore the comprehensive utilization efficiency of renewable energy sources is integrally increased. Utilize photovoltaic power generation drive heat pump to heat, realized the pluralism of solar energy utilization form, increased flexibility and the reliability of terminal energy consumption.
The heat pump system of the solar phase-change energy-storage vacuum tube heat collector greatly improves the comprehensive utilization rate of solar energy, ensures the output of electric power and fully utilizes the solar heat; secondly, the air is heated by using the heat pipe heat collector with the heat storage function as a heat source of the heat pump, so that the problems of frosting and defrosting of the heat pump in cold regions are avoided, the efficiency of the heat pump is improved by at least 20%, and meanwhile, the hot air is used as the heat source of the heat pump, so that the problems of running, falling, dripping and the like caused by using a water system as the heat source of the heat pump, which seriously affect the energy efficiency and the safety of the system are avoided; and thirdly, as the temperature at the heat source side is increased, the temperature at the condensation side of the heat pump is increased, and under the condition of ensuring that the COP (coefficient of performance) of the heat pump unit is not reduced, the high-temperature heat medium is output to provide terminal loads with different temperature requirements, including but not limited to a domestic hot water supply device, a radiator, a floor heating device, a fan coil, an air conditioning unit and the like. Therefore, the system improves the reliability and robustness of solar energy utilization, and makes great contribution to improving the utilization rate of renewable energy sources and energy conservation and emission reduction.
Drawings
The technical solution and other advantages of the present application will become apparent from the detailed description of the embodiments of the present application with reference to the accompanying drawings.
Fig. 1 is a flow structure diagram of a heat pump heating system of a phase-change energy-storage vacuum tube heat collector provided in an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a phase-change energy-storage vacuum tube heat collector provided in an embodiment of the present application.
The labels in the figure are as follows:
a solar photovoltaic power generation set 1, a phase change energy storage vacuum tube heat collector 2, an inverter 3,
a heat pump unit 4, a tail end heat load 5, a hot water tank 6,
an electric load 7, a solar photovoltaic panel 11, an air heating cavity 21,
and a phase change heat storage tube 22.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The embodiment of the application provides a heat pump heating system of a phase-change energy-storage vacuum tube heat collector, which comprises three process flows, namely solar photovoltaic power generation, heating circulating air of the phase-change energy-storage vacuum tube heat collector serving as a heat pump heat source and high-temperature hot water prepared by a heat pump unit. The solar photovoltaic power generation supplies power to the heat pump unit and the power load at the tail end after converging and inverting, and the internet can be accessed under the condition of abundant power. The phase-change energy-storage vacuum tube heat collector with the phase-change material heat storage function absorbs heat in high-temperature air at the bottom of the solar photovoltaic panel, heats circulating air to serve as a heat source at the evaporator side of the heat pump unit, the heat pump unit produces high-temperature hot water to supply heat load to the tail end, and a flow chart of the system is shown in a figure 1.
Specifically, referring to fig. 1, the heat pump heating system of the phase-change energy-storage vacuum tube heat collector comprises a solar photovoltaic power generation set 1, a phase-change energy-storage vacuum tube heat collector 2 (shown by a dotted line frame in the figure), an inverter 3, a heat pump set 4 and a tail end heat load 5; the solar photovoltaic power generation set 1 comprises a plurality of solar photovoltaic panels 11, all the solar photovoltaic panels 11 are electrically connected to the inverter 3, and the inverter 3 is electrically connected to a power grid; an evaporator (not shown) is arranged at one side of the heat pump unit 4; the heat pump unit 4 is electrically connected to the inverter 3; the phase-change energy-storage vacuum tube heat collector 2 is arranged below the solar photovoltaic panel 11 to absorb heat in high-temperature air at the bottom of the corresponding solar photovoltaic panel 11 and heat circulating air to be used as a heat source at the evaporator side of the heat pump unit 4; the heat pump unit 4 obtains electric power from the inverter 3 to produce high-temperature hot water and supplies the high-temperature hot water to the end heat load 5.
In this embodiment, the phase-change energy-storage vacuum tube heat collector 2 is provided with a plurality of heat collectors, and each of the phase-change energy-storage vacuum tube heat collectors 2 is correspondingly placed at the bottom of one solar photovoltaic panel 11. The solar photovoltaic panel heat collector is arranged to absorb heat in high-temperature air at the bottom of the corresponding solar photovoltaic panel 11 on the one hand and reduce the space occupied by the phase change energy storage vacuum tube heat collector 2 on the other hand.
In this embodiment, the position of the phase change energy storage evacuated tube collector 2 coincides with the position of the solar photovoltaic panel 11, or the area of the phase change energy storage evacuated tube collector 2 is smaller than or equal to the area of the solar photovoltaic panel 11.
In this embodiment, the solar photovoltaic panels 11 are arranged in an array at intervals. Correspondingly, the phase change energy storage vacuum tube heat collectors 2 are also arranged at intervals in an array manner.
Specifically, referring to fig. 2, in the present embodiment, the phase-change energy-storing evacuated tube collector 2 is provided with an air heating cavity 21 and a phase-change heat storage tube 22 disposed in the air heating cavity 21, and the phase-change heat storage tube 22 is disposed along an extending direction of the air heating cavity 21.
In this embodiment, the phase-change heat storage tube 22 is an annular loop, and two ends of the phase-change heat storage tube 22 extend out of the air heating cavity 21 and are disposed on the evaporator side of the heat pump unit 4. The both ends of phase change heat storage pipe 22 are in heat pump set 4 evaporimeter side is connected heat pump set 4 evaporimeter side release heat, follow the bottom absorption heat of solar photovoltaic board 11 relies on the air heating mode like this to have avoided adopting the energy consumption that water cycle caused big and the high risk of water system leakage probability. The running, the leakage and the dripping of a water system are common phenomena along with the increase of the running time, and the water body is softened and the maintenance cost of the system is increased by adding medicines. And the temperature of the evaporator side of the heat pump unit 4 can be effectively increased by means of air heating, so that the heat pump unit 4 is ensured to produce high-temperature hot water, and the pressure ratio of the compressor is not increased, and the COP (coefficient of performance) of the heat pump is not seriously reduced.
In this embodiment, the heat pump heating system of the solar phase-change energy-storage vacuum tube heat collector 2 further comprises a hot water tank 6; the heat pump unit 4 is connected to the hot water tank 6 through a pipeline. The hot water tank 6 can also buffer the return water on the side of the end heat load 5.
In the present embodiment, the terminal heat load 5 includes at least one of a domestic hot water supply device, a radiator, a floor heating device, a fan coil, and an air conditioning unit, which increases flexibility and reliability of terminal energy use.
In the present embodiment, the inverter 3 is also electrically connected to an electric load 7. Wherein the electrical load 7 may be an electrical device at said end thermal load 5.
In the present embodiment, the heat pump unit 4 is provided with an inverse carnot cycle unit (not shown), and the heat pump unit 4 generates hot water by the inverse carnot cycle.
For convenience of understanding, the following description will be made in detail with reference to fig. 1, in which the photovoltaic power generation, the phase-change energy-storage vacuum tube heat collector 2 heats the circulating air, and the heat pump unit 4 generates high-temperature hot water.
1. Photovoltaic power generation
The first step of the heating system production chain is photovoltaic power generation. From an economic point of view, it is preferable to use the renewable power driven heat pump unit 4, and particularly after the renewable power supply exceeds the number of hours of the grid purchase, the use of the renewable power driven heat pump can avoid power blockage and negative electricity prices. The renewable power has obvious characteristics of intermittency and randomness, the heat pump unit 4 is driven by power and has quick response capability, and the cold start time is within 1 minute.
2. Phase-change energy-storage vacuum tube heat collector heating circulating air
The second step of the production chain of the system is that the phase change energy storage vacuum tube heat collector 2 heats the circulating air, the phase change energy storage vacuum tube heat collector 2 is placed at the bottom of the solar photovoltaic panel 11 (shown by a dotted line frame in the figure), and the circulating air is heated by absorbing heat to be used as a heat source at the evaporator side of the heat pump unit 4. Because the air temperature is high, the heat pump unit 4 can not generate frosting after absorbing heat, and the frosting is not needed to be regularly carried out like the conventional heat pump unit 4. The resistance coefficient of air flow is far less than that of water, so that the power consumption of the air circulating fan is far less than that of a water circulating system, leakage and leakage are not easy to occur, particularly, in cold northern areas, once shutdown or no solar radiation occurs, a water system is easy to freeze, expand and crack, so that the system is damaged, and the air serving as a circulating medium can well overcome the defect. Meanwhile, the phase-change energy storage vacuum tube heat collector 2 has a heat storage function due to the fact that the phase-change material is arranged on the phase-change energy storage vacuum tube heat collector, solar heat which is not completely used can be stored, heat collection efficiency of the vacuum tube and energy efficiency of a system are greatly improved, meanwhile, the fluctuation range of circulating air temperature can be reduced by stabilizing, and the phenomenon that the temperature of the heat collector 2 is too high to cause pipeline burst when the solar radiation intensity is large is avoided.
3. The heat pump unit generates high-temperature hot water
Because the circulating air at the evaporation side is used as a heat source, the heat pump unit 4 can generate high-temperature hot water to meet different heat requirements at the tail end. If the tail end heat load 5 needs higher water temperature, hot water generated by the heat pump unit 4 is directly supplied, and if the required water temperature is lower, the hot water generated by the heat pump unit 4 and return water at the side of the tail end heat load 5 are mixed and then supplied, so that the water requirements of different temperatures are met.
The heat pump heating system of the phase change energy storage vacuum tube heat collector provided by the embodiment of the application is a solar PVT heat and electricity combined supply system, firstly, solar photovoltaic power generation is utilized, power is supplied to a heat pump unit and a tail end load after confluence and inversion, the phase change energy storage vacuum tube heat collector absorbs heat at the bottom of a solar photovoltaic panel, circulating water is heated and then supplied to the evaporator side of the heat pump unit, and the heat pump unit generates hot water through reverse Carnot circulation and supplies the hot water to a tail end heat user.
Through the combined heat and power system, the heat generated by the solar photovoltaic system can be fully utilized, especially in cold regions, the evaporation temperature of the heat pump can be effectively increased, the performance coefficient of the heat pump is increased, and therefore the comprehensive utilization efficiency of renewable energy sources is integrally increased. Utilize photovoltaic power generation to drive the heat pump and heat, realized the pluralism of solar energy utilization form, increased flexibility and the reliability of terminal energy consumption.
The heat pump system of the solar phase-change energy-storage vacuum tube heat collector greatly improves the comprehensive utilization rate of solar energy, ensures the power output and simultaneously fully utilizes the solar heat; secondly, the air is heated by using the heat pipe heat collector with the heat storage function as a heat source of the heat pump, so that the problems of frosting and defrosting of the heat pump in cold regions are avoided, the efficiency of the heat pump is improved by at least 20%, and meanwhile, the hot air is used as the heat source of the heat pump, so that the problems of running, falling, dripping and the like caused by using a water system as the heat source of the heat pump, which seriously affect the energy efficiency and the safety of the system are avoided; and thirdly, as the temperature at the heat source side is increased, the temperature at the condensation side of the heat pump is increased, and under the condition of ensuring that the COP (coefficient of performance) of the heat pump unit is not reduced, the high-temperature heat medium is output to provide terminal loads with different temperature requirements, including but not limited to a domestic hot water supply device, a radiator, a floor heating device, a fan coil, an air conditioning unit and the like. Therefore, the system improves the reliability and robustness of solar energy utilization, and makes great contribution to improving the utilization rate of renewable energy sources and energy conservation and emission reduction.
The heat pump heating system of the phase change energy storage vacuum tube collector provided by the embodiment of the application is described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the application, and the description of the embodiment is only used for helping to understand the technical scheme and the core idea of the application; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure as defined by the appended claims.
Claims (10)
1. A heat pump heating system of a phase-change energy-storage vacuum tube heat collector is characterized by comprising a solar photovoltaic power generation set, the phase-change energy-storage vacuum tube heat collector, an inverter, a heat pump set and a tail end heat load;
the solar photovoltaic power generation set comprises a plurality of solar photovoltaic panels, all the solar photovoltaic panels are electrically connected to the inverter, and the inverter is electrically connected to the power grid;
an evaporator is arranged on one side of the heat pump unit; the heat pump unit is electrically connected to the inverter;
the phase-change energy-storage vacuum tube heat collector is arranged below the solar photovoltaic panel to absorb heat in high-temperature air at the bottom of the corresponding solar photovoltaic panel and heat circulating air to serve as a heat source at the evaporator side of the heat pump unit;
the heat pump unit obtains electric energy from the inverter to produce high-temperature hot water and supplies the high-temperature hot water to the tail end heat load.
2. The heat pump heating system of a phase-change energy-storage vacuum tube collector as claimed in claim 1, wherein a plurality of phase-change energy-storage vacuum tube collectors are provided, and each phase-change energy-storage vacuum tube collector is correspondingly placed at the bottom of one solar photovoltaic panel.
3. The heat pump heating system of a phase-change energy-storage evacuated tube collector of claim 2, wherein the position of the phase-change energy-storage evacuated tube collector coincides with the position of the solar photovoltaic panel, or the area of the phase-change energy-storage evacuated tube collector is less than or equal to the area of the solar photovoltaic panel.
4. The heat pump heating system of a phase-change energy-storage evacuated tube collector of claim 1, wherein the solar photovoltaic panels are arranged at intervals in an array.
5. The phase-change energy-storage evacuated tube collector heat pump heating system according to claim 1, wherein the phase-change energy-storage evacuated tube collector is provided with an air heating chamber and a phase-change heat storage tube provided in the air heating chamber, the phase-change heat storage tube being provided along an extending direction of the air heating chamber.
6. The heat supply system of a phase-change energy-storage vacuum tube collector heat pump as claimed in claim 5, wherein the phase-change heat storage tube is a loop, and two ends of the phase-change heat storage tube extend out of the air heating cavity and are arranged at the evaporator side of the heat pump unit.
7. The phase-change energy-storage evacuated tube collector heat pump heating system according to claim 1, wherein the phase-change energy-storage evacuated tube collector heat pump heating system further comprises a hot water tank; the heat pump unit is connected to the hot water tank through a pipeline.
8. The phase change energy storage evacuated tube collector heat pump heating system of claim 1, wherein the terminal thermal load comprises at least one of a domestic hot water supply, a radiator, a floor heating, a fan coil and an air conditioning unit.
9. The phase change energy storage evacuated tube collector heat pump heating system of claim 1, wherein the inverter is further electrically connected to a consumer load.
10. The phase-change energy-storage evacuated tube collector heat pump heating system according to claim 1, wherein the heat pump unit is provided with an inverse carnot cycle unit, and the heat pump unit generates hot water by the inverse carnot cycle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221845610.8U CN217816950U (en) | 2022-07-18 | 2022-07-18 | Heat pump heating system of phase-change energy-storage vacuum tube heat collector |
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| CN202221845610.8U CN217816950U (en) | 2022-07-18 | 2022-07-18 | Heat pump heating system of phase-change energy-storage vacuum tube heat collector |
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