CN116058215A - PVT heat pump composite energy supply system for facility agriculture greenhouse - Google Patents
PVT heat pump composite energy supply system for facility agriculture greenhouse Download PDFInfo
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- CN116058215A CN116058215A CN202310307835.0A CN202310307835A CN116058215A CN 116058215 A CN116058215 A CN 116058215A CN 202310307835 A CN202310307835 A CN 202310307835A CN 116058215 A CN116058215 A CN 116058215A
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- 239000002131 composite material Substances 0.000 title claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 115
- 230000001105 regulatory effect Effects 0.000 claims description 76
- 239000002689 soil Substances 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 21
- 238000001816 cooling Methods 0.000 abstract description 13
- 238000005265 energy consumption Methods 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 32
- 238000010586 diagram Methods 0.000 description 20
- 238000004146 energy storage Methods 0.000 description 19
- 238000010248 power generation Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 13
- 238000005338 heat storage Methods 0.000 description 11
- 239000002826 coolant Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
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- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
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- 230000002269 spontaneous effect Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G9/00—Cultivation in receptacles, forcing-frames or greenhouses; Edging for beds, lawn or the like
- A01G9/24—Devices or systems for heating, ventilating, regulating temperature, illuminating, or watering, in greenhouses, forcing-frames, or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
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Abstract
The invention discloses a PVT heat pump composite energy supply system for a facility agriculture greenhouse, which comprehensively utilizes an indirect expansion PVT heat collection and exchange subsystem, a cold and hot double-storage subsystem and an auxiliary energy subsystem, and takes renewable energy sources such as solar radiation energy, air energy, sky long wave radiation energy and the like as main energy sources, so that the comprehensive energy utilization rate is high. The system can select different energy supply modes according to different application scenes, meteorological conditions and greenhouse energy supply requirement conditions, realizes that the same set of system outputs heat energy, electric energy and cold energy under different seasons of the whole year, realizes one-machine multipurpose and whole year time-sharing combined heat and power cooling, and meets the requirement of stable and continuous heat, electricity and cold energy consumption of modern facility agriculture greenhouse buildings. Therefore, the composite energy supply system provided by the application is a green energy-saving environment-friendly composite greenhouse energy supply system which is suitable for low-carbon clean energy supply and comfortable indoor environment construction of a facility agriculture greenhouse and has great popularization and application values.
Description
Technical Field
The invention relates to the technical field of energy, in particular to a PVT heat pump composite energy supply system for a facility agriculture greenhouse.
Background
The nations are placing higher demands on clean energy supply of greenhouse buildings and building a comfortable environment suitable for the full growth cycle of crops.
The greenhouse building is mainly a facility agriculture greenhouse at present, has the characteristics of long service life, no limitation of season and climate in planting, easy realization of automation and intellectualization and the like, and gradually becomes a typical representative of modern agriculture. However, the existing facility agriculture greenhouse has the problems of huge energy consumption base, low energy utilization efficiency, poor environmental adjustability, high cost input, limited yield and the like which are to be solved urgently, so that the development and utilization of renewable energy sources are fully utilized, and the exploration of a facility agriculture greenhouse composite energy supply system for realizing the efficient and comprehensive utilization of renewable energy sources is particularly important.
Solar energy is an inexhaustible novel renewable energy source. In the field of facility agriculture, solar lighting, additional sunlight, solar photo-thermal utilization, photoelectric utilization and the like are mature at present, but the bottleneck problems of low comprehensive utilization rate of solar energy, low utilization rate of solar energy system equipment, single solar energy utilization mode and the like still exist. In order to overcome the problems, the former has explored the technical aspect of combined heat and power and cold generation of a solar photovoltaic photo-thermal (PVT) heat pump. The PVT heat pump combined heat and power and cold production technology is an organic combination of PVT heat pump technology and solar photovoltaic power generation technology, and can realize the simultaneous output of electric energy, heat energy and cold energy on the same system by adjusting the operation mode of the system according to different seasons and weather conditions, so as to supply the annual thermoelectric cold energy requirement of a greenhouse, improve the utilization rate of energy sources to the greatest extent, realize the all-weather operation of the system, improve the utilization rate of equipment and have remarkable energy-saving effect.
However, the PVT heat pump cogeneration technology is limited by solar energy, and can only operate under the condition of the sun, and the solar energy system can not meet the heat supply requirement in extremely severe weather such as overcast, rainy, snowy and the like. Therefore, the novel composite energy supply system suitable for the facility agriculture greenhouse, which has the advantages of simple equipment composition, high energy utilization rate, combined energy storage/auxiliary energy devices and high equipment utilization rate in the system, has important practical value.
Disclosure of Invention
In order to solve the technical problems, the invention provides the following technical scheme:
the embodiment of the invention provides a PVT heat pump composite energy supply system for a facility agriculture greenhouse, which comprises an indirect expansion PVT heat collection and exchange subsystem, a cold and hot double-storage subsystem, an auxiliary energy subsystem and a greenhouse energy supply subsystem; the indirect expansion type PVT heat collection and heat exchange subsystem is respectively communicated with the cold and hot double-storage subsystem and the auxiliary energy subsystem through a first circulating water pump, and the cold and hot double-storage subsystem and the auxiliary energy subsystem are also communicated, so that the indirect expansion type PVT heat collection and heat exchange subsystem is matched with the cold and hot double-storage subsystem and/or the auxiliary energy subsystem to supply energy to the greenhouse energy supply subsystem; the greenhouse energy supply subsystem is respectively communicated with the indirect expansion PVT heat collection and heat exchange subsystem, the cold and hot double-storage subsystem and the auxiliary energy subsystem through a second circulating water pump, so that the greenhouse energy supply subsystem receives heat or cold energy transferred by the indirect expansion PVT heat collection and heat exchange subsystem, the cold and hot double-storage subsystem and the auxiliary energy subsystem.
Preferably, the indirect expansion type PVT heat collection and exchange subsystem comprises a solar PVT assembly, a solution pump, a liquid storage tank, a dry filter and a heat exchanger which form a closed loop connection structure; the heat exchanger is respectively communicated with the cold and hot double-storage subsystem, the auxiliary energy subsystem and the greenhouse energy supply subsystem.
Preferably, the cold and hot double storage subsystem comprises a soil buried pipe or a water tank.
Preferably, the auxiliary energy subsystem comprises a heat pump unit or a boiler.
Preferably, the greenhouse energy supply subsystem comprises a plurality of groups of fan coils and a photovoltaic inverter, and the fan coils are respectively communicated with the second circulating water pump; the photovoltaic inverter is in communication with the solar PVT assembly.
Preferably, a third circulating water pump is further arranged between the cold and hot double-storage subsystem and the auxiliary energy subsystem.
Preferably, electric regulating valves are arranged between the indirect expansion type PVT heat collection and heat exchange subsystem and the cold and hot double-storage subsystem, between the indirect expansion type PVT heat collection and heat exchange subsystem and the auxiliary energy subsystem, between the indirect expansion type PVT heat collection and heat exchange subsystem and the greenhouse energy supply subsystem, between the cold and hot double-storage subsystem and the auxiliary energy subsystem, between the cold and hot double-storage subsystem and the greenhouse energy supply subsystem, and between the auxiliary energy subsystem and the greenhouse energy supply subsystem.
The PVT heat pump composite energy supply system for the facility agriculture greenhouse comprehensively utilizes the solar PVT assembly, the cold and hot dual-storage subsystem and the auxiliary energy subsystem, uses renewable energy sources such as solar radiation energy, air energy and sky long wave radiation energy as main energy sources, saves energy consumption, and improves the comprehensive energy utilization rate. The system can also select different energy supply modes such as direct energy supply of the indirect expansion PVT heat collection and heat exchange subsystem, energy supply of the cold and hot double-storage subsystem and/or energy supply of the auxiliary energy subsystem according to different application scenes, meteorological conditions and greenhouse energy supply requirement conditions, so that the equipment utilization rate is greatly improved, and the system is simple in composition. The regulation and the switching between the operation of different energy supply modes are flexibly realized through different electric regulating valve combinations, so that the same system outputs heat energy, electric energy and cold energy under different seasons of the whole year, the multi-purpose and annual time-sharing combined heat and cold supply of one machine is realized, and the annual heat, electricity and cold stable and continuous energy consumption requirements of modern facility agriculture greenhouse buildings are met. Therefore, the composite energy supply system provided by the application is a green energy-saving environment-friendly composite greenhouse energy supply system which is suitable for low-carbon clean energy supply and comfortable indoor environment construction of a facility agriculture greenhouse and has great popularization and application values.
Drawings
Fig. 1 is a schematic structural diagram of a PVT heat pump composite energy supply system for a facility agriculture greenhouse according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an auxiliary energy mode of an indirect expansion PVT heat collection-soil energy storage-heat pump unit;
FIG. 3 is a schematic diagram of an indirect expansion PVT heat collection direct energy supply mode in an auxiliary energy mode of an indirect expansion PVT heat collection-soil energy storage-heat pump unit;
fig. 4 is a schematic diagram of an indirect expansion type PVT heat collection and heat pump unit energy supply mode in an auxiliary energy mode of the indirect expansion type PVT heat collection-soil energy storage-heat pump unit;
FIG. 5 is a schematic diagram of a direct soil source energy supply mode in an auxiliary energy mode of an indirect expansion PVT heat collection-soil energy storage-heat pump unit;
FIG. 6 is a schematic diagram of an energy supply mode of a soil source and a heat pump unit in an auxiliary energy mode of an indirect expansion PVT heat collection-soil energy storage-heat pump unit;
FIG. 7 is a schematic diagram of a soil cross-season energy storage mode of operation in an indirect expansion PVT heat collection-soil energy storage-heat pump unit auxiliary energy mode;
FIG. 8 is a schematic diagram of an auxiliary energy mode of an indirect expansion PVT heat collection-water tank energy storage-heat pump unit;
FIG. 9 is a schematic diagram of an indirect expansion PVT heat collection direct energy supply mode in an auxiliary energy mode of an indirect expansion PVT heat collection-water tank energy storage-heat pump unit;
FIG. 10 is a schematic diagram of indirect expansion PVT heat collection and water tank energy supply mode heat supply in an auxiliary energy mode of an indirect expansion PVT heat collection-water tank energy storage-heat pump unit;
FIG. 11 is a schematic diagram of indirect expansion PVT heat collection and water tank energy supply mode cold supply in an auxiliary energy mode of an indirect expansion PVT heat collection-water tank energy storage-heat pump unit;
fig. 12 is a schematic diagram of indirect expansion PVT heat collection + water tank + heat pump unit energy supply mode heating in the auxiliary energy mode of the indirect expansion PVT heat collection-water tank energy storage-heat pump unit;
FIG. 13 is a schematic diagram of indirect expansion PVT heat collector + water tank + heat pump unit energy supply mode cold supply in the auxiliary energy mode of the indirect expansion PVT heat collector-water tank energy storage-heat pump unit;
FIG. 14 is a schematic diagram of an indirect expansion PVT heat collector-tank heat storage-boiler auxiliary heat;
FIG. 15 is a schematic diagram of an indirect expansion PVT heat collection-tank heat storage-boiler auxiliary heat indirect expansion PVT heat collection direct heating mode;
FIG. 16 is a schematic diagram of an indirect expansion PVT heat collection-tank heat storage-boiler auxiliary heat indirect expansion PVT heat collection + tank heat supply mode;
FIG. 17 is a schematic diagram of an indirect expansion PVT heat collection-tank heat storage-boiler auxiliary heat lower boiler heating mode;
the symbols represent:
01-indirect expansion PVT heat collection and exchange subsystem, 02-cold and hot double-storage subsystem, 03-auxiliary energy subsystem and 04-greenhouse energy subsystem;
the solar energy PVT assembly comprises a 1-solar PVT assembly, a 2-solution pump, a 3-liquid storage tank, a 4-dry filter, a 5-heat exchanger, a 6-first circulating water pump, a 7-second circulating water pump, an 8-soil buried pipe, a 9-water tank, a 10-heat pump unit, a 11-boiler, a 12-fan coil, a 13-photovoltaic inverter, a 14-third circulating water pump, a 15-first electric regulating valve, a 16-second electric regulating valve, a 17-third electric regulating valve, a 18-fourth electric regulating valve, a 19-fifth electric regulating valve, a 20-sixth electric regulating valve, a 21-seventh electric regulating valve, a 22-eighth electric regulating valve, a 23-ninth electric regulating valve, a 24-tenth electric regulating valve, a 25-eleventh electric regulating valve, a 26-twelfth electric regulating valve, a 27-thirteenth electric regulating valve, a 28-fourteenth electric regulating valve, a 29-heat storage water tank, a 30-cold storage water tank, a 31-fifteenth electric regulating valve, a 32-sixteenth electric regulating valve, a 33-seventeenth electric regulating valve and 34-eighteenth electric regulating valve.
Detailed Description
The present invention is described below with reference to the drawings and the detailed description.
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a PVT heat pump composite energy supply system for a facility agriculture greenhouse according to an embodiment of the present application. As can be seen from fig. 1, the PVT heat pump composite energy supply system for a facility agriculture greenhouse provided in the embodiment of the present application includes an indirect expansion PVT heat collection and heat exchange subsystem 01, a cold and hot dual-storage subsystem 02, an auxiliary energy subsystem 03 and a greenhouse energy supply subsystem 04. Wherein, all be equipped with multiunit electric control valve between indirect expansion formula PVT heat collection heat transfer subsystem 01 and cold and hot two stores up subsystem 02, between indirect expansion formula PVT heat collection heat transfer subsystem 01 and auxiliary energy subsystem 03, between indirect expansion formula PVT heat collection heat transfer subsystem 01 and greenhouse energy supply subsystem 04, between cold and hot two stores up subsystem 02 and auxiliary energy subsystem 03, between cold and hot two stores up subsystem 02 and greenhouse energy supply subsystem 04, and auxiliary energy subsystem 03 and greenhouse energy supply subsystem 04 to the regulation and the switching of energy supply mode are realized through multiunit electric control valve.
Specifically, the indirect expansion PVT heat collection and heat exchange subsystem 01 in the embodiments of the present application includes a solar PVT assembly 1, a solution pump 2, a liquid storage tank 3, a dry filter 4, and a heat exchanger 5 that form a closed loop connection structure. That is, the solar PVT assembly 1, the solution pump 2, the liquid storage tank 3, the dry filter 4, and the heat exchanger 5 are sequentially communicated, and the heat exchanger 5 is also communicated with the solar PVT assembly 1, thereby forming a closed loop connection structure.
The indirect expansion type PVT heat collection and heat exchange subsystem 01 adopts antifreeze fluid, heat conduction oil or nanofluid and the like as heat exchange media, and the heat exchange media can circulate in the indirect expansion type PVT heat collection and heat exchange subsystem 01 of a closed loop connection structure formed by the solar PVT assembly 1 and the like so as to transfer heat or cold.
In the embodiment of the application, the heat, electricity and cold triple supply is realized through the solar PVT assembly 1. Specifically, during the daytime when the solar radiation illuminance is high, the heat exchange medium absorbs solar radiation energy, air convection heat energy and heat generated by self-heating of the photovoltaic cells in the heat exchange plate flow channel at the back of the solar PVT component 1. The solution pump 2 as a flow power is capable of transporting a heat exchange medium carrying heat into the heat exchanger 5 such that the heat exchange medium exchanges heat with the cold medium in the heat exchanger 5. The cold medium after the temperature is increased supplies heat to the greenhouse energy supply subsystem 04. The heat exchange medium with reduced temperature is dried and filtered by a drying filter 4 and then is conveyed to a liquid storage tank 3 so as to store redundant heat exchange medium. The heat exchange medium stored in the liquid storage tank 3 is conveyed into the solar PVT assembly 1 through the solution pump 2, so that the indirect expansion PVT heat collection and heat exchange subsystem 01 forms a closed heat collection circulation structure.
The indirect expansion type PVT heat collection and heat exchange subsystem 01 is used for converting solar radiation energy into direct current electric energy through photovoltaic effect by a photovoltaic cell at the upper layer of the solar PVT assembly 1 while heat collection circulation is carried out, so that grid-connected power generation or storage battery storage is realized, and annual power consumption requirements of a greenhouse of a facility are met. The surface temperature of the assembly can be reduced by the heat energy produced and output by the solar PVT assembly 1, so that the generating capacity and the generating efficiency of the photovoltaic cell are improved, and the efficient cogeneration of heat and power is realized.
In addition, in summer, at night in transition season with cold energy demand and in daytime in overcast and rainy weather, the cold medium which flows out of the greenhouse energy supply subsystem 04 and carries a large amount of heat exchanges heat with the heat exchange medium in the heat exchanger 5, and then the heat exchange medium with the temperature increased further enters the solar PVT assembly 1 through the dry filter 4 and the solution pump 2. The solar PVT component 1 releases heat carried in a heat exchange medium into the air in a mode of air cooling radiation heat exchange and air convection heat exchange, so that the benefits of refrigeration and cold output are achieved. Meanwhile, the photovoltaic power generation capacity in the daytime can supply power consumption requirements of various power consumption equipment and greenhouses of the system, so that the spontaneous self-use of the whole system power is realized, the residual power is on line or stored, and the combined production and supply of various energy sources of the system.
The cold and hot double storage subsystem 02 in the embodiment of the application comprises a soil buried pipe 8 or a water tank 9 to realize soil energy storage or water tank energy storage. The choice of the soil buried pipe 8 or the water tank 9 is determined according to different application scenes, so that the cold and hot double-storage subsystem 02 can store cold and hot energy under each operation condition and working mode all the year round.
The auxiliary energy subsystem 03 in the embodiment of the present application includes a heat pump unit 10 or a boiler 11 to form an auxiliary cold and heat source device. The selection of the heat pump unit 10 or the boiler 11 is determined according to different application scenes, so that the auxiliary energy subsystem 03 can continuously and stably provide heat or cold for the greenhouse energy subsystem 04.
The greenhouse energy supply subsystem 04 in the embodiment of the application comprises a plurality of groups of fan coils 12, photovoltaic inverters 13, grid-connected power distribution cabinets (not shown in the figure), storage batteries (not shown in the figure) and the like. Wherein, the plurality of groups of fan coils 12 are respectively communicated with the second circulating water pump 7, so that the cooling medium can enter and exit the plurality of groups of fan coils 12 through the second circulating water pump 7. The photovoltaic inverter 13 is communicated with the solar PVT assembly 1, so that direct current generated on the solar PVT assembly 1 is converted into alternating current through the photovoltaic inverter 13, grid-connected power generation or storage battery storage is further realized, and annual power consumption requirements of a greenhouse are met.
In the embodiment of the application, the indirect expansion type PVT heat collection and heat exchange subsystem 01 is respectively communicated with the cold and hot double-storage subsystem 02 and the auxiliary energy subsystem 03 through a first circulating water pump 6, and particularly, a heat exchanger 5 in the indirect expansion type PVT heat collection and heat exchange subsystem 01 is respectively communicated with the cold and hot double-storage subsystem 02 and the auxiliary energy subsystem 03 through the first circulating water pump 6. The cold and hot double-storage subsystem 02 and the auxiliary energy subsystem 03 are also communicated, so that the indirect expansion PVT heat collection and exchange subsystem 01 is matched with the cold and hot double-storage subsystem 02 and/or the auxiliary energy subsystem 03 to supply energy to the greenhouse energy supply subsystem 04.
In addition, the greenhouse energy supply subsystem 04 is respectively communicated with the indirect expansion type PVT heat collection and exchange subsystem 01, the cold and hot dual-storage subsystem 02 and the auxiliary energy subsystem 03 through the second circulating water pump 7, so that the greenhouse energy supply subsystem 04 receives heat or cold transferred by the indirect expansion type PVT heat collection and exchange subsystem 01, the cold and hot dual-storage subsystem 02 and the auxiliary energy subsystem 03.
The implementation method of the PVT heat pump composite energy supply system for the facility agriculture greenhouse, which is provided by the embodiment of the application, for providing energy for the facility agriculture greenhouse has three representative methods, namely indirect expansion type PVT heat collection-soil energy storage-heat pump unit auxiliary energy, indirect expansion type PVT heat collection-water tank energy storage-heat pump unit auxiliary energy and indirect expansion type PVT heat collection-water tank heat storage-boiler auxiliary heat. The corresponding system operation modes are as follows: the indirect expansion type PVT heat collection and heat exchange subsystem 01 is used for directly heating/cooling, the indirect expansion type PVT heat collection and heat exchange subsystem 01 and the cold and hot double-storage subsystem 02 are used for combined energy storage, the auxiliary energy subsystem 03 is used for heating, the auxiliary energy subsystem 03 is used for cooling, the indirect expansion type PVT heat collection and heat exchange subsystem 01, the cold and hot double-storage subsystem 02 and the auxiliary energy subsystem 03 are used for combined heating/cooling, and the like, and the operation modes are switched through a plurality of groups of electric regulating valves. The following detailed description refers to the accompanying drawings.
The implementation mode is as follows: indirect expansion PVT heat collection-soil energy storage-heat pump unit auxiliary energy
For soil energy storage, the wide planting area in the greenhouse provides conditions for the integration of soil energy storage technology. Soil is an excellent energy storage body, and the cooperative use of soil energy storage, solar energy and a heat pump unit can be realized through the arrangement and the laying of the buried pipes, so that a new idea is provided for the efficient storage and the comprehensive utilization of heat energy and cold energy. Fig. 2 shows a schematic diagram of auxiliary energy of an indirect expansion PVT heat collection-soil energy storage-heat pump unit according to an embodiment of the present application, and the following description of a first implementation method is based on fig. 2.
1. Indirect expansion PVT heat collection direct energy supply mode
In the daytime of the daytime, the summer night and the overcast and rainy days with larger solar radiation illuminance in winter and transitional seasons, the compound energy supply system provided by the embodiment of the application can directly supply heat or cool for the fan coil 12 in the greenhouse by the indirect expansion type PVT heat collection and heat exchange subsystem 01, and the energy supply mode is an indirect expansion type PVT heat collection direct energy supply mode, as shown in the attached figure 3.
When the indirect expansion PVT heat collection and exchange subsystem 01 directly supplies power to the greenhouse power supply subsystem 04, the third electric regulating valve 17, the fourth electric regulating valve 18, the eleventh electric regulating valve 25, the twelfth electric regulating valve 26, the second circulating water pump 7 and the solution pump 2 are opened, and the other electric regulating valves and the first circulating water pump 6 are closed. In the process of the internal circulation of the indirect expansion PVT heat collection and exchange subsystem 01, the heat exchange medium absorbs heat in the heating working condition and releases heat in the refrigerating and cooling working condition in the heat exchange modes of solar radiation heat exchange, air convection heat exchange, sky cold radiation heat exchange and the like of the solar PVT assembly 1, and then the prepared heat or cold is transferred to the heat exchanger 5. The cold medium in the greenhouse energy subsystem 04 exchanges heat with the heat exchange medium at the heat exchanger 5, thereby transferring heat or cold through the cold medium into the greenhouse energy subsystem 04. Under the action of the driving force of the second circulating water pump 7, the cooling medium circulates in the greenhouse energy supply subsystem 04 by taking water as a medium, and finally, heat or cold is supplied to the greenhouse through the fan coil 12, so that the heating or refrigerating requirement of the greenhouse is realized. Meanwhile, direct-current electric energy generated by the solar PVT assembly 1 is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power consumption requirements are realized.
2. Indirect expansion type PVT heat collection and heat pump unit energy supply mode
When the meteorological conditions can not completely meet the requirements of directly supplying cold and hot energy to the greenhouse or intermittently can not be met, the indirect expansion type PVT heat collection and heat exchange subsystem 01 is matched with the heat pump unit 10 to ensure the stability and continuity of greenhouse energy supply, and the energy supply mode is an indirect expansion type PVT heat collection and heat pump unit energy supply mode, as shown in fig. 4.
When the system is in the energy supply mode of the indirect expansion PVT heat collection and heat pump unit, all the electric regulating valves, the second circulating water pump 7 and the solution pump 2 are started, and the first circulating water pump 6 is closed. The heat and cold produced by the indirect expansion PVT heat collection and heat exchange subsystem 01 is used as a low-temperature heat source or cold source of the heat pump unit 10, and after the secondary lifting of the heat pump unit 10, the heat source with higher temperature or the cold source with lower temperature is transmitted to the greenhouse energy supply subsystem 04 through the second circulating water pump 7, so that the heating or refrigerating requirement of the greenhouse is realized. Meanwhile, direct-current electric energy generated by the solar PVT assembly 1 is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power consumption requirements are realized.
3. Soil source direct energy supply mode
When the energy demand of greenhouse heat supply and cold supply is not great in transition season, but the meteorological conditions are insufficient, the indirect expansion type PVT heat collection and heat exchange subsystem 01 is adopted to directly supply energy, the greenhouse soil buried pipe 8 can be adopted to directly supply energy to the greenhouse, so that energy consumption caused by operation of redundant equipment is saved, and the energy supply mode is a soil source direct energy supply mode, as shown in figure 5.
When in the soil source direct energy supply mode, the first electric regulating valve 15, the second electric regulating valve 16, the third electric regulating valve 17, the fourth electric regulating valve 18, the first circulating water pump 6 and the second circulating water pump 7 are opened, and the other electric regulating valves and the solution pump 2 are closed. In summer or cold winter, where solar radiation is greater, the indirect expansion PVT heat collection and heat exchange subsystem 01 stores excess heat or cold in the buried pipe 8. Through the second circulating water pump 7, the cold medium circulates in the cold and hot double-storage subsystem 02 and the greenhouse energy supply subsystem 04 by taking water as a medium, and then the cold medium transmits heat or cold in the soil buried pipe 8 to the fan coil 12, so that the heating or refrigerating requirement of the greenhouse is realized. Meanwhile, direct-current electric energy generated by the solar PVT assembly 1 is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power consumption requirements are realized.
4. Soil source+heat pump unit energy supply mode
When meteorological conditions cannot meet the requirement of adopting the indirect expansion type PVT heat collection and heat exchange subsystem 01 for energy supply and the soil buried pipe 8 cannot meet the requirement of cold and heat energy sources of a greenhouse, the greenhouse can be powered by the soil buried pipe 8 and the heat pump unit 10 in a matched mode, and the mode of power supply is a mode of power supply of the soil source and the heat pump unit, as shown in fig. 6.
When the system is in the soil source+heat pump unit energy supply mode, the third electric regulating valve 17, the fourth electric regulating valve 18, the fifth electric regulating valve 19, the sixth electric regulating valve 20, the ninth electric regulating valve 23, the tenth electric regulating valve 24, the first circulating water pump 6 and the second circulating water pump 7 are opened, and the other electric regulating valves and the solution pump 2 are closed. The heat and cold energy stored in the soil buried pipe 8 is used as a low-temperature heat source or cold source of the heat pump unit 10, and after the heat pump unit 10 is secondarily lifted, the heat source with higher temperature or the cold source with lower temperature is transmitted to the greenhouse energy supply subsystem 04 through the second circulating water pump 7, so that the heating or refrigerating requirement of the greenhouse is realized. Meanwhile, direct-current electric energy generated by the solar PVT assembly 1 is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power consumption requirements are realized.
5. Soil cross-season energy storage operation mode
In summer with larger solar radiation illuminance, the greenhouse has no heat supply requirement, and the indirect expansion type PVT heat collection and exchange subsystem 01 has the best heating performance and the most prepared heat. Meanwhile, in order to reduce the temperature of the photovoltaic cell of the solar PVT component 1 and improve the power generation efficiency, the indirect expansion PVT heat collection and heat exchange system 01 can be kept to continuously operate and store heat into the soil buried pipe 8, and the energy supply mode is a soil cross-season energy storage operation mode when the energy supply mode is used for supplying heat to a greenhouse in a transitional season and in winter, as shown in fig. 7.
When the soil energy storage running mode is in a soil cross-season energy storage running mode, the first electric regulating valve 15, the second electric regulating valve 16, the eleventh electric regulating valve 25, the twelfth electric regulating valve 26, the first circulating water pump 6 and the solution pump 2 are opened, and the other electric regulating valves and the second circulating water pump 7 are closed. At this time, the indirect expansion type PVT heat collection and heat exchange system 01 runs continuously, so that the surface temperature of the solar PVT component 1 can be reduced, the photovoltaic power generation efficiency is improved, heat can be converted efficiently and stored in soil, and comprehensive and efficient utilization of thermoelectric cold energy is realized.
The implementation mode II is as follows: indirect expansion PVT heat collection-water tank energy storage-heat pump unit auxiliary energy
For water tank energy storage, the heat preservation water tank energy storage is the most commonly used cold and hot energy storage mode, and the mode has the advantages of stable energy storage, simple structure, low manufacturing cost, convenient installation and the like, and is a cold and hot energy storage device widely applied to solar energy systems. Therefore, in the embodiment of the application, the indirect expansion PVT heat collection, the water tank energy storage and the heat pump unit auxiliary energy are cooperatively used, so that a new idea is provided for efficient storage and comprehensive utilization of heat energy and cold energy. In order to realize efficient storage and comprehensive utilization of heat energy and cold energy of the water tank, the water tank in the embodiment of the application is a heat storage water tank 29 and a cold storage water tank 30, and a third circulating water pump 14 is further arranged between the cold and hot double-storage subsystem 02 and the auxiliary energy subsystem 03, as shown in fig. 8.
1. Indirect expansion PVT heat collection direct energy supply mode
In the daytime of the daytime, the summer night and the overcast and rainy days with larger solar radiation illuminance in winter and transitional seasons, the compound energy supply system provided by the embodiment of the application can directly supply heat or cool for the fan coil 12 in the greenhouse by the indirect expansion type PVT heat collection and heat exchange subsystem 01, and the energy supply mode is an indirect expansion type PVT heat collection direct energy supply mode, as shown in the attached figure 9.
When the indirect expansion PVT heat collection and exchange subsystem 01 directly supplies power to the greenhouse power supply subsystem 04, the third electric regulating valve 17, the fourth electric regulating valve 18, the first circulating water pump 6, the second circulating water pump 7 and the solution pump 2 are opened, and the other electric regulating valves and the third circulating water pump 14 are closed. In the process of the internal circulation of the indirect expansion PVT heat collection and exchange subsystem 01, the heat exchange medium absorbs heat in the heating working condition and releases heat in the refrigerating and cooling working condition in the heat exchange modes of solar radiation heat exchange, air convection heat exchange, sky cold radiation heat exchange and the like of the solar PVT assembly 1, and then the prepared heat or cold is transferred to the heat exchanger 5. The cold medium in the greenhouse energy subsystem 04 exchanges heat with the heat exchange medium at the heat exchanger 5, thereby transferring heat or cold through the cold medium into the greenhouse energy subsystem 04. Under the action of the driving force of the second circulating water pump 7, the cooling medium circulates in the greenhouse energy supply subsystem 04 by taking water as a medium, and finally, heat or cold is supplied to the greenhouse through the fan coil 12, so that the heating or refrigerating requirement of the greenhouse is realized. Meanwhile, direct-current electric energy generated by the solar PVT assembly 1 is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power consumption requirements are realized.
2. Indirect expansion PVT heat collection and water tank energy supply mode
When the meteorological conditions can not completely meet the requirements of directly supplying cold and heat energy to the greenhouse or intermittently can not be met, the indirect expansion type PVT heat collection and exchange subsystem 01 is matched with the heat storage water tank 29 for use, so that the stability and the continuity of the heat of the greenhouse are ensured; or the indirect expansion PVT heat collection and exchange subsystem 01 is matched with the cold accumulation water tank 30 to ensure the stability and continuity of the greenhouse cold quantity; the energy supply mode is an indirect expansion PVT heat collection and water tank energy supply mode, as shown in figures 10 and 11.
When the heat is supplied in the indirect expansion type PVT heat collection and water tank energy supply mode, the first electric regulating valve 15, the second electric regulating valve 16, the third electric regulating valve 17, the fourth electric regulating valve 18, the seventh electric regulating valve 21, the eighth electric regulating valve 22, the thirteenth electric regulating valve 27, the fourteenth electric regulating valve 28, the first circulating water pump 6, the second circulating water pump 7 and the solution pump 2 are started, and the other electric regulating valves and the third circulating water pump 14 are closed. When the cooling is performed in the indirect expansion PVT heat collection and water tank energy supply mode, the fifteenth electric control valve 31, the sixteenth electric control valve 32, the third electric control valve 17, the fourth electric control valve 18, the seventeenth electric control valve 33, the eighteenth electric control valve 34, the thirteenth electric control valve 27, the fourteenth electric control valve 28, the first circulation water pump 6, the second circulation water pump 7, and the solution pump 2 are started, and the other electric control valves and the third circulation water pump 14 are closed.
The indirect expansion PVT heat collection and exchange subsystem 01 is continuously operated all the time, and the prepared heat or cold is stored in the heat storage water tank 29 or the cold storage water tank 30 through the heat exchanger 5. When the stored heat or cold meets the heating or cooling requirement of the greenhouse, the heat or cold is supplied to the fan coil 12 through the second circulating water pump 7 so as to ensure the heating or cooling requirement of the greenhouse. Meanwhile, direct-current electric energy generated by the solar PVT assembly 1 is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power consumption requirements are realized.
3. Indirect expansion type PVT heat collection, water tank and heat pump unit energy supply mode
When the water tank can not fully meet the demand of supplying cold and heat energy for the greenhouse, the indirect expansion PVT heat collection and heat exchange subsystem 01, the heat storage water tank 29 and the heat pump unit 10 can be used in a matched mode so as to ensure the stability and the continuity of the heat of the greenhouse; or the indirect expansion PVT heat collection and exchange subsystem 01, the cold accumulation water tank 30 and the heat pump unit 10 are matched for use so as to ensure the stability and the continuity of the greenhouse cold quantity; the energy supply mode is an indirect expansion PVT heat collection, water tank and heat pump unit energy supply mode, and is shown in figures 12 and 13.
When the heat supply is in the energy supply mode of the indirect expansion PVT heat collection, the water tank and the heat pump unit, the first electric regulating valve 15 to the tenth electric regulating valve 24, the first circulating water pump 6, the second circulating water pump 7, the third circulating water pump 14 and the solution pump 2 are started, and other electric regulating valves are closed. When the cooling system is in the energy supply mode of the indirect expansion PVT heat collection, water tank and heat pump unit, starting the fifteenth electric regulating valve 31 to the eighteenth electric regulating valve 34, the third electric regulating valve 17 to the sixth electric regulating valve 20, the ninth electric regulating valve 23, the tenth electric regulating valve 24, the first circulating water pump 6, the second circulating water pump 7, the third circulating water pump 14 and the solution pump 2, and closing other electric regulating valves.
The indirect expansion type PVT heat collection and exchange subsystem 01 continuously operates all the time, and the prepared heat or cold is stored in the heat storage water tank 29 or the cold storage water tank 30 through the heat exchanger 5 and is used as a low-temperature heat source or a cold source of the heat pump unit 10. After the heat pump unit 10 is lifted for the second time, a heat source with higher temperature or a cold source with lower temperature is transmitted to the greenhouse energy supply subsystem 04 through the second circulating water pump 7, so that the heating or refrigerating requirement of the greenhouse is realized. Meanwhile, direct-current electric energy generated by the solar PVT assembly 1 is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power consumption requirements are realized.
And the implementation mode is three: indirect expansion PVT heat collection-water tank heat storage-boiler auxiliary heat
Under the extremely severe weather conditions in winter heating period, in order to ensure the continuity and stability of the heat supply of the facility agriculture greenhouse, an auxiliary heat source needs to be arranged, and the greenhouse auxiliary heat supply is realized, namely, the auxiliary energy subsystem 03 in the embodiment of the application needs to be arranged. The boiler has the advantages of simple structure, stable heat supply, high heat value, low cost, convenient installation and the like, and becomes a winter heat supply device commonly used in facility agriculture greenhouses. In the embodiment of the application, the heat storage of the indirect expansion PVT heat collection and exchange subsystem 01 and the heat storage water tank 29 are matched with the auxiliary heat of the boiler 11, so that the utilization rate of renewable energy sources for heating in winter of a facility agriculture greenhouse can be improved, and a new idea is provided for guaranteeing heat supply stability and continuity. Fig. 14 shows a schematic diagram of indirect expansion PVT heat collection-tank heat storage-boiler auxiliary heat provided in an embodiment of the present application, and the following description of the implementation method three is based on fig. 14.
1. Indirect expansion PVT heat collection direct heat supply mode
In the daytime when the solar radiation illuminance is high in heating season, the indirect expansion type PVT heat collection and heat exchange subsystem 01 can directly supply heat to the fan coil 12 in the greenhouse, and the energy supply mode is an indirect expansion type PVT heat collection and direct heat supply mode, as shown in fig. 15.
When the indirect expansion PVT heat collection and exchange subsystem 01 directly supplies power to the greenhouse power supply subsystem 04, the third electric regulating valve 17, the fourth electric regulating valve 18, the first circulating water pump 6, the second circulating water pump 7 and the solution pump 2 are opened, and other electric regulating valves are closed.
In the process of the internal circulation of the indirect expansion PVT heat collection and exchange subsystem 01, the heat exchange medium circulates through the heat exchange medium in a heat exchange mode of solar radiation heat exchange, air convection heat exchange, sky cold radiation heat exchange and the like, and operates in a combined heat and power generation mode and absorbs heat. The solar PVT assembly 1 transfers the prepared heat to the heat exchanger 5. The cold medium in the greenhouse energy subsystem 04 exchanges heat with the heat exchange medium at the heat exchanger 5, thereby transferring heat through the cold medium into the greenhouse energy subsystem 04. Under the action of the driving force of the second circulating water pump 7, the cold medium circulates in the greenhouse energy supply subsystem 04 by taking water as a medium, and finally heat is supplied to the greenhouse through the fan coil 12, so that the heating requirement of the greenhouse is realized. Meanwhile, direct-current electric energy generated by the solar PVT assembly 1 is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power consumption requirements are realized.
2. Indirect expansion PVT heat collection and water tank heat supply mode
When the meteorological conditions can not completely meet the heat supply requirement of the greenhouse directly supplied by the indirect expansion type PVT heat collection and heat exchange subsystem 01 or the intermittent conditions can not be met, the indirect expansion type PVT heat collection and heat exchange subsystem 01 is matched with the heat storage water tank 29 for use, so that the stability and the continuity of the greenhouse heat are ensured; the energy supply mode is an indirect expansion PVT heat collection and water tank heat supply mode, as shown in figure 16.
When the system is in the indirect expansion type PVT heat collection and water tank heat supply mode, the first electric regulating valve 15, the second electric regulating valve 16, the seventh electric regulating valve 21, the eighth electric regulating valve 22, the first circulating water pump 6, the second circulating water pump 7 and the solution pump 2 are started, and the other electric regulating valves are closed. The indirect expansion PVT heat collection and exchange subsystem 01 is continuously operated all the time and stores the prepared heat in the heat storage tank 29 through the heat exchanger 5. When the stored heat meets the heating requirement of the greenhouse, the heat is supplied to the fan coil 12 through the second circulating water pump 7 so as to ensure the heating requirement of the greenhouse. Meanwhile, direct-current electric energy generated by the solar PVT assembly 1 is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power consumption requirements are realized.
3. Boiler heating mode
When the heat stored by the indirect expansion type PVT heat collection and heat exchange subsystem 01 and the heat storage water tank 29 in cooperation still cannot meet the greenhouse heat supply requirement, the boiler 11 is started to serve as auxiliary heat supply equipment to ensure the stability and the continuity of greenhouse heat supply, and the energy supply mode is a boiler heat supply mode, as shown in fig. 17.
When in the boiler heating mode, the ninth electric control valve 23, the tenth electric control valve 24 and the second circulating water pump 7 are started, and the other electric control valves, the first circulating water pump 6 and the solution pump 2 are closed. The boiler 11 heats a cooling medium using water as a medium with a high-heating value gas as a fuel to obtain a cooling medium having a relatively high temperature. The boiler 11 transmits the prepared high-temperature cooling medium to the fan coil 12 in the greenhouse energy supply subsystem 04 through the second circulating water pump 7, so that the heating requirement of the greenhouse is met. In the boiler heating mode, the heating mode of the indirect expansion type PVT heat collection and exchange subsystem 01 does not operate, and only the solar PVT assembly 1 is used as power generation equipment, and the generated direct-current electric energy is converted into alternating-current electric energy through the photovoltaic inverter 13, so that grid-connected power generation or direct supply of indoor power utilization requirements are realized.
From the above description, it can be seen that the indirect expansion PVT heat collection and exchange subsystem 01 is continuously operated when the greenhouse in the facility agriculture needs heating. When the heat collected by the indirect expansion PVT heat collection and heat exchange subsystem 01 meets the direct heat supply requirement, the indirect expansion PVT heat collection and heat exchange subsystem 01 directly supplies heat to the facility agriculture greenhouse. When the heat collected by the indirect expansion PVT heat collection and exchange subsystem 01 can not meet the direct heat supply requirement, the collected heat is efficiently stored in the cold and hot double-storage subsystem 02, and then the indirect expansion PVT heat collection and exchange subsystem 01 and the cold and hot double-storage subsystem 02 supply heat to the facility agriculture greenhouse at the same time. If the heat supply requirement is not satisfied, the auxiliary energy subsystem 03 is started, and the heat is further supplied in an auxiliary heat mode. The heating mode greatly improves the energy utilization rate and the equipment utilization rate. In addition, when the facility agriculture greenhouse needs to be cooled, namely when ventilation air conditioner is needed, the system provided by the embodiment of the application can still perform cooling in different modes through the indirect expansion type PVT heat collection and heat exchange subsystem 01, the cold and hot double-storage subsystem 02 and the auxiliary energy subsystem 03 so as to ensure that the cooling capacity requirement of the facility agriculture greenhouse is met.
The PVT heat pump composite energy supply system for the facility agriculture greenhouse comprehensively utilizes the solar PVT component 1, the cold and hot double-storage subsystem 02 and the auxiliary energy subsystem 03, takes renewable energy sources such as solar radiation energy, air energy and sky long wave radiation energy as main energy sources, saves energy consumption, and improves the comprehensive energy utilization rate. The system can also select different energy supply modes such as direct energy supply of the indirect expansion PVT heat collection and heat exchange subsystem, energy supply of the cold and hot double-storage subsystem 02, energy supply of the auxiliary energy subsystem 03 and the like according to different application scenes, meteorological conditions and greenhouse energy supply requirement conditions, so that the equipment utilization rate is greatly improved, and the system is simple in composition. The regulation and the switching between the operation of different energy supply modes are flexibly realized through different electric regulating valve combinations, so that the same system outputs heat energy, electric energy and cold energy under different seasons of the whole year, the multi-purpose and annual time-sharing combined heat and cold supply of one machine is realized, and the annual heat, electricity and cold stable and continuous energy consumption requirements of modern facility agriculture greenhouse buildings are met. Therefore, the composite energy supply system provided by the embodiment of the application is a green energy-saving environment-friendly composite greenhouse energy supply system which is suitable for low-carbon clean energy supply and comfortable indoor environment construction of a facility agriculture greenhouse and has great popularization and application values.
It should be noted that in this document, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Claims (7)
1. The PVT heat pump composite energy supply system for the facility agriculture greenhouse is characterized by comprising an indirect expansion PVT heat collection and exchange subsystem (01), a cold and hot dual-storage subsystem (02), an auxiliary energy subsystem (03) and a greenhouse energy supply subsystem (04); wherein,,
the indirect expansion PVT heat collection and heat exchange subsystem (01) is respectively communicated with the cold and hot double-storage subsystem (02) and the auxiliary energy subsystem (03) through a first circulating water pump (6), and the cold and hot double-storage subsystem (02) and the auxiliary energy subsystem (03) are also communicated, so that the indirect expansion PVT heat collection and heat exchange subsystem (01) is matched with the cold and hot double-storage subsystem (02) and/or the auxiliary energy subsystem (03) to supply energy to the greenhouse energy supply subsystem (04);
the greenhouse energy supply subsystem (04) is respectively communicated with the indirect expansion PVT heat collection and heat exchange subsystem (01), the cold and hot double-storage subsystem (02) and the auxiliary energy subsystem (03) through a second circulating water pump (7), so that the greenhouse energy supply subsystem (04) receives heat or cold transferred by the indirect expansion PVT heat collection and heat exchange subsystem (01), the cold and hot double-storage subsystem (02) and the auxiliary energy subsystem (03).
2. The PVT heat pump composite energy supply system for a facility agriculture greenhouse according to claim 1, wherein the indirect expansion PVT heat collection heat exchange subsystem (01) comprises a solar PVT assembly (1), a solution pump (2), a liquid storage tank (3), a dry filter (4) and a heat exchanger (5) forming a closed loop connection structure; the heat exchanger (5) is respectively communicated with the cold and hot double-storage subsystem (02), the auxiliary energy subsystem (03) and the greenhouse energy supply subsystem (04).
3. PVT heat pump composite energy supply system for a facility agriculture greenhouse according to claim 2, characterized in that the cold and hot double storage subsystem (02) comprises a soil buried pipe (8) or a water tank (9).
4. PVT heat pump composite energy supply system for a facility agriculture greenhouse according to claim 2, characterized in that the auxiliary energy subsystem (03) comprises a heat pump unit (10) or a boiler (11).
5. PVT heat pump composite power supply system for a facility agriculture greenhouse according to claim 2, wherein the greenhouse power supply subsystem (04) comprises a plurality of sets of fan coils (12) and a photovoltaic inverter (13), the plurality of sets of fan coils (12) each being in communication with the second circulating water pump (7); the photovoltaic inverter (13) is in communication with the solar PVT assembly (1).
6. PVT heat pump composite energy supply system for a facility agriculture greenhouse according to claim 2, characterized in that a third circulating water pump (14) is further arranged between the cold and hot double storage subsystem (02) and the auxiliary energy subsystem (03).
7. PVT heat pump composite energy supply system for a facility agriculture greenhouse according to any one of claims 1-6, characterized in that electric regulating valves are arranged between the indirect expansion PVT heat collection heat exchange subsystem (01) and the cold and hot double storage subsystem (02), between the indirect expansion PVT heat collection heat exchange subsystem (01) and the auxiliary energy subsystem (03), between the indirect expansion PVT heat collection heat exchange subsystem (01) and the greenhouse energy supply subsystem (04), between the cold and hot double storage subsystem (02) and the auxiliary energy subsystem (03), between the cold and hot double storage subsystem (02) and the greenhouse energy supply subsystem (04) and between the auxiliary energy subsystem (03) and the greenhouse energy supply subsystem (04).
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