CN110966779A - Solar heat pump system using building material PV/T plate and energy storage type building material - Google Patents
Solar heat pump system using building material PV/T plate and energy storage type building material Download PDFInfo
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- CN110966779A CN110966779A CN201911245007.9A CN201911245007A CN110966779A CN 110966779 A CN110966779 A CN 110966779A CN 201911245007 A CN201911245007 A CN 201911245007A CN 110966779 A CN110966779 A CN 110966779A
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Images
Classifications
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/20—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption
- F24S70/25—Coatings made of metallic material
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
- F25B27/005—Machines, plants or systems, using particular sources of energy using solar energy in compression type systems
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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
- F25B30/02—Heat pumps of the compression type
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S30/00—Structural details of PV modules other than those related to light conversion
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
- H02S40/425—Cooling means using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
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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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/272—Solar heating or cooling
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/60—Thermal-PV hybrids
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Building Environments (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a solar heat pump system using a building material PV/T plate and an energy storage type building material, which comprises an MPPT solar controller, a photovoltaic inverter, a main refrigerant circulating pipeline, an auxiliary refrigerant circulating pipeline, a hot water tank circulating pipeline and an energy storage circulating pipeline, wherein the MPPT solar controller is connected with the photovoltaic inverter through the MPPT solar controller; the main refrigerant circulating pipeline and the auxiliary refrigerant circulating pipeline are respectively a PV/T heat pump circulating pipeline and an air-cooled heat exchanger heat pump circulating pipeline, and the PV/T heat pump circulating pipeline is connected with the air-cooled heat exchanger heat pump circulating pipeline in parallel; the heat exchanger for the heat collection water tank is connected with the heat collection water tank through a heat exchange pipeline of the domestic heat collection water tank; the heat exchanger for the buffer water tank is connected with the buffer water tank through an energy storage type building material heat exchange pipeline; and an outlet of the wall embedded PV/T plate is connected with the MPPT solar controller. The invention has the beneficial effects that: the wall embedded PV/T power generation/heat collection/evaporation plate adopted by the invention can be combined with a building facade wall and embedded into a sunny side wall, does not occupy the roof space of a high-rise building, and can realize the installation of each household.
Description
Technical Field
The invention relates to a solar heat pump technology with an energy storage structure, which realizes building integration through a building material energy storage unit, in particular to a solar heat pump system using a building material PV/T plate and an energy storage type building material.
Background
China, as the first world with large energy consumption and the countries with the largest carbon dioxide emission, has increasingly severe pressure on energy conservation and emission reduction, and is accompanied by environmental and atmospheric pollution problems, and the transformation of energy structures is imminent. The development and utilization of renewable energy sources become one of the effective solutions, and solar energy is the first choice in universality, permanence and pollution-free property. At present, the solar energy is mainly utilized in the forms of photoelectricity and photothermal, and has quite wide application in various fields of human production and life, but due to the defects of instability, low energy density, poor persistence and the like of the solar energy, a plurality of bottlenecks exist in the aspect of efficiently and stably utilizing the solar energy, and the progress of distributed energy propulsion is influenced. The power generation efficiency of the solar cell panel is also sharply reduced due to the increase in the temperature of the solar cell panel.
In order to overcome the problem of low energy utilization rate of a solar system, the inventor has invented a PV/T technology which couples a photovoltaic module and a heat collector, reduces the temperature of the photovoltaic module, improves the electrical efficiency, recovers waste heat, can greatly reduce the conventional power consumption, and thus improves the comprehensive energy utilization efficiency. However, due to the unstable characteristics of thermoelectric output, obstacles are brought to the regulation and control of the energy-saving stability of the building, so that the technology is limited in popularization. In order to solve the problem of unstable system output, the prior people propose a solar energy system coupled with energy storage equipment, and the use of the energy storage equipment can greatly reduce the instability of a solar heat pump system, but because the energy storage equipment needs to additionally provide an installation position, the practicability and the economical efficiency are lacked when the solar energy system is popularized in an urban area where land resources are scarce. In addition, the PV/T panel using water and air as heat exchange media has been popularized in the market due to low cost and simple structure, but the overall efficiency is inferior to that of the direct expansion type PV/T panel using refrigerant as media due to poor heat exchange effect and poor heat transfer capability. In addition, due to the scarcity of urban land resources, integration of solar modules and buildings becomes the mainstream. Under the great trend of urbanization, the distributed energy utilization of buildings becomes the middle and hard force for promoting the energy conversion in China, and the key for popularizing the solar distributed energy utilization system is how to efficiently utilize solar energy and stabilize the system output.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a solar heat pump system using a building material PV/T plate and an energy storage type building material, which realizes the high-efficiency utilization and high building integration of solar energy, has high comprehensive energy utilization rate, and reduces the floor area of energy storage equipment by using a phase change material and building heat capacity.
The solar heat pump system using the building material PV/T plate and the energy storage type building material comprises an MPPT solar controller, a photovoltaic inverter, a main refrigerant circulating pipeline, an auxiliary refrigerant circulating pipeline, a hot water tank circulating pipeline and an energy storage circulating pipeline;
the main refrigerant circulating pipeline and the auxiliary refrigerant circulating pipeline are respectively a PV/T heat pump circulating pipeline and an air-cooled heat exchanger heat pump circulating pipeline, and the PV/T heat pump circulating pipeline is connected with the air-cooled heat exchanger heat pump circulating pipeline in parallel; the PV/T heat pump circulation pipeline comprises a wall embedded PV/T plate, a compressor, a heat exchanger for a heat collection water tank, a heat exchanger for a buffer water tank and an electronic expansion valve, wherein the electronic expansion valve is connected with an inlet of the wall embedded PV/T plate, an outlet of the wall embedded PV/T plate is respectively connected with an inlet of the heat exchanger for the heat collection water tank and an inlet of the heat exchanger for the buffer water tank through the compressor, and an outlet of the heat exchanger for the heat collection water tank and an outlet of the heat exchanger for the buffer water; the air-cooled heat exchanger heat pump circulating pipeline comprises an air-cooled heat exchanger, a compressor, a heat exchanger for a heat collecting water tank, a heat exchanger for a buffer water tank and an electronic expansion valve, wherein the electronic expansion valve is connected with an inlet of the air-cooled heat exchanger;
the heat exchanger for the heat collection water tank is connected with the heat collection water tank through a heat exchange pipeline of the domestic heat collection water tank, the hot water tank circulation pipeline comprises the heat collection water tank, a domestic hot water supply end and a tap water replenishing end, an inlet of the heat collection water tank is connected with the tap water replenishing end, and an outlet of the heat collection water tank is connected with the domestic hot water supply end;
the heat exchanger for the buffer water tank is connected with the buffer water tank through an energy storage type building material heat exchange pipeline, the energy storage circulation pipeline comprises the buffer water tank, a wall energy storage type building material and a floor energy storage type building material, an outlet of the buffer water tank is respectively connected with an inlet of the wall energy storage type building material and an inlet of the floor energy storage type building material, and an outlet of the wall energy storage type building material and an outlet of the floor energy storage type building material are respectively connected with an inlet of the buffer water;
the outlet of the wall embedded PV/T plate is connected with an MPPT solar controller, the MPPT solar controller is respectively connected with a direct current load and a photovoltaic inverter, and the photovoltaic inverter is connected with an alternating current load.
Preferably, the method comprises the following steps: the wall embedded PV/T board is a PV/T board embedded into a building facade, the PV/T board comprises a solar cell panel, an EVA (ethylene vinyl acetate) adhesive film, an inflation board and a heat insulating material from outside to inside, and the contact part of the PV/T board and the building is packaged by heat insulation aluminum alloy; the wall embedded PV/T plate is formed by laminating a photovoltaic module and a single-side blown inflation plate, and the photovoltaic module is adhered to the inflation plate through EVA (ethylene vinyl acetate) glue; and spraying a black chromium electroplating selective coating on the surface of the embedded PV/T plate of the wall.
Preferably, the method comprises the following steps: the blowing-expanding plate is formed by blowing an all-aluminum plate on a single surface, the top surface of the blowing-expanding plate is a flat plate and is pressed and tightly attached to the back surface of the solar cell panel through EVA (ethylene vinyl acetate) glue, the bottom surface of the blowing-expanding plate is a refrigerant flow channel, and the refrigerant flow channel is a hexagonal and chessboard-shaped coupling flow channel; and the inner side of the blowing plate is provided with a heat insulating material.
Preferably, the method comprises the following steps: the energy storage type building material is a sleeve pipe pipeline embedded in the floor and coupled with the ground heating pipeline, a heat storage circulating medium is arranged in the sleeve pipe, and a phase change material is arranged in the sleeve pipe; the outer layer maintenance structure adopts common concrete or foam concrete; the solid wood floor or the ceramic tile is arranged above the common concrete or the foam concrete, and the polystyrene board and the building material concrete are arranged below the common concrete or the foam concrete.
The operation method of the solar heat pump system using the building material PV/T plate and the energy storage type building material comprises the following steps:
1) under the working condition of sunny days, the system takes the wall embedded PV/T plate as a main component and works in a power generation/heat collection/energy storage mode, the refrigerant with lower dryness after being expanded by the electronic expansion valve in the main refrigerant circulating pipeline absorbs heat generated by the solar cell through the wall embedded PV/T plate, so that the heat is absorbed and evaporated, the volume is expanded, the refrigerant flows out from the wall embedded PV/T plate outlet and then enters the compressor, and the refrigerant is communicated with the heat exchanger to form closed PV/T heat pump circulation; the temperature of the solar cell panel absorbing heat through the evaporation of the refrigerant is reduced, so that power generation and heat collection are realized; direct current generated by the solar panel is supplied to a direct current load through the MPPT solar controller, and the rest electric energy is converted into alternating current through the photovoltaic inverter and then is merged into a national power grid or provides the power demand of the system; the heat collection water tank exchanges heat with the heat exchanger for the heat collection water tank through a heat exchange pipeline of the domestic heat collection water tank, water is stored in the heating water tank, and domestic hot water is supplied; the energy storage type building material exchanges heat with the buffer water tank through an energy storage circulation pipeline, heat is transferred and stored in the phase change material and the heat capacity of the building, and peak clipping and valley filling are achieved;
2) under the working condition of rainy days or nights, the system takes an air-cooled heat exchanger as a main component, works in a heat collection/energy storage mode, a secondary refrigerant circulating pipeline is communicated, a refrigerant with low dryness after being expanded by an electronic expansion valve absorbs heat in air or rainwater through the air-cooled heat exchanger, so that heat is absorbed and evaporated, the volume of the refrigerant is expanded, the refrigerant flows out from an outlet of the air-cooled heat exchanger and then enters a compressor, and the refrigerant is communicated with the heat exchanger to form closed heat pump circulation of the air-cooled heat exchanger; under the working condition, the solar cell panel power generation circuit, the wall embedded PV/T plate and the main refrigerant circulating pipeline do not participate in working, and other components and the circulating pipeline are consistent with the working condition in sunny days; under the working condition, heat collection and energy storage are realized;
3) if the solar irradiation intensity is not high, the PV/T plate embedded in the wall and the pipeline of the air-cooled heat exchanger are opened simultaneously, so that not only solar energy but also air heat energy are absorbed, the opening degree of the pipeline of the air-cooled heat exchanger connected in parallel is controlled by an electromagnetic valve V1, and the proportion of heat absorption from the photovoltaic module and the air is controlled according to weather conditions;
4) adjusting the electromagnetic valves V2, V6, V7 and V8 to control the heat stored in the energy storage type building materials; the electromagnetic valves V3 and V5 are adjusted to control the heat stored in the heat collecting water tank, and the heat collecting water tank is supplemented with water through the electromagnetic valve V4.
Preferably, the method comprises the following steps: and 4) collecting heat into the heat collection water tank, and switching the electromagnetic valve to collect and store the heat into the energy storage type building material if the temperature and the water quantity of the domestic hot water are reached.
The invention has the beneficial effects that:
1. the wall embedded PV/T power generation/heat collection/evaporation plate adopted by the invention can be combined with a building facade wall and embedded into a sunny side wall, so that the roof space of a high-rise building is not occupied, and the installation of each household can be realized; and through the design that the PV/T plate is embedded into the wall body, the heat transfer resistance is effectively improved, and compared with a common wall body, the wall body has a better enclosure structure and the indoor load is reduced.
2. Compared with the traditional water-based and air-based PV/T plate and the direct-expansion type inflation plate which is not optimized by the flow channel design, the direct-expansion type inflation plate which is optimized by the flow channel design has higher efficiency, and realizes efficient heat collection and cooling of the solar cell panel; the inflation plate with the optimized flow passage design has smaller pressure loss, better heat transfer effect and more uniform temperature distribution, and lays a foundation for the stable operation of the system;
3. the invention adopts energy storage type building materials, separates the heat exchange medium from the energy storage material by using the sleeve, buries the heat exchange medium in the floor, and stores energy by using the phase change material and the building heat capacity.
4. The parallel air-cooled heat exchangers are adopted to enhance the stability of the system operation, and the wall embedded PV/T power generation/heat collection/evaporation plate is connected with the air-cooled heat exchangers in parallel, so that the system can stably output under all-weather conditions, and has higher efficiency and better operation stability compared with a single energy input system.
5. The system has high integration level with a building, not only can the wall embedded PV/T plate be combined with a building facade or a roof, but also the energy storage equipment is integrated with the building, thereby greatly reducing the equipment floor area of urban areas lack of land resources; the system integrates power generation, heat collection and energy storage, can realize zero energy consumption of the building or output electric energy outwards under the condition of good external conditions, and provides a feasible scheme for the popularization of green buildings.
Drawings
FIG. 1 is a schematic diagram of a system cycle for a solar heat pump system using a building material PV/T panel and an energy storage building material;
FIG. 2 is a cross-sectional view of an energy storing building material unit;
FIG. 3 is a schematic view of the installation of the wall embedded PV/T power generation/heat collection/evaporation plate.
Description of reference numerals: 1-MPPT solar controller; 2-a compressor; 3-a fan; 4-air cooling heat exchanger; 5-heat exchanger for heat collecting water tank; 6-a heat collecting water tank; 7-domestic hot water supply end; 8-a tap water replenishing end; 9-wall energy storage type building materials; 10-direct current load; 11-an alternating current load; 12-a photovoltaic inverter; 13-wall embedded PV/T plate; 14-three-way valve; 15-electronic expansion valve; 16-heat exchanger for buffer water tank; 17-a circulation pump; 18-a solenoid valve; 19-a buffer water tank; 20-floor energy storage type building materials; 21-outer tube of casing; 22-a phase change material; 23-a thermal storage circulating medium; 24-a casing inner tube; 25-solid wood flooring or tiles; 26-ordinary concrete or foam concrete; 27-polystyrene board; 28-building material concrete; 29-sunlight; 30-a wall body; 31-power output; 32-a refrigerant outlet; 34-refrigerant inlet.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The solar heat pump system using the building material PV/T plate and the energy storage building material simultaneously utilizes the photovoltaic power generation technology and the direct expansion type PV/T heat pump technology, thereby not only reducing the temperature of a photovoltaic module and improving the power generation efficiency, but also improving the evaporation temperature of a heat pump so as to improve the system efficiency; the energy storage type building materials are used, so that the building integration is enhanced, the economic efficiency and feasibility of the system popularization are improved, and multiple functions of power generation, heat collection, energy storage and the like are realized.
As shown in fig. 1 to 3, the solar heat pump system using the PV/T panel for building materials and the energy storage type building materials includes an MPPT solar controller 1, a photovoltaic inverter 12, electromagnetic valves V1 to V8, a three-way valve 14, circulation pumps P1 to P3, a main refrigerant circulation line, an auxiliary refrigerant circulation line, a hot water tank circulation line, and an energy storage circulation line.
The main refrigerant circulating pipeline and the auxiliary refrigerant circulating pipeline are respectively a PV/T heat pump circulating pipeline and an air-cooled heat exchanger heat pump circulating pipeline, and the PV/T heat pump circulating pipeline is connected with the air-cooled heat exchanger heat pump circulating pipeline in parallel; the PV/T heat pump circulation pipeline comprises a wall embedded PV/T plate 13, a compressor 2, a heat exchanger and an electronic expansion valve 15, wherein the electronic expansion valve 15 is connected with an inlet of the wall embedded PV/T plate 13, an outlet of the wall embedded PV/T plate 13 is respectively connected with an inlet of a heat exchanger 5 for a heat collection water tank and an inlet of a heat exchanger 16 for a buffer water tank through the compressor 2, and an outlet of the heat exchanger 5 for the heat collection water tank and an outlet of the heat exchanger 16 for the buffer water tank are respectively connected with the electronic expansion valve. The air-cooled heat exchanger heat pump circulating pipeline comprises an air-cooled heat exchanger 4, a compressor 2, a heat exchanger and an electronic expansion valve 15, wherein the electronic expansion valve 15 is connected with an inlet of the air-cooled heat exchanger 4, an outlet of the air-cooled heat exchanger 4 is respectively connected with an inlet of a heat exchanger 5 for a heat collecting water tank and an inlet of a heat exchanger 16 for a buffer tank through the compressor 2, and an outlet of the heat exchanger 5 for the heat collecting water tank and an outlet of the heat exchanger 16 for the buffer tank are.
The heat exchanger 5 for the heat collection water tank is connected with the heat collection water tank 6 through a heat exchange pipeline of the domestic heat collection water tank, the hot water tank circulation pipeline comprises the heat collection water tank 6, a domestic hot water supply end 7 and a tap water replenishing end 8, an inlet of the heat collection water tank 6 is connected with the tap water replenishing end 8, and an outlet of the heat collection water tank 6 is connected with the domestic hot water supply end 7.
The heat exchanger 16 for the buffer water tank is connected with the buffer water tank 19 through an energy storage type building material heat exchange pipeline, the energy storage circulation pipeline comprises the buffer water tank 19, a wall energy storage type building material 9 and a floor energy storage type building material 20, an outlet of the buffer water tank 19 is respectively connected with an inlet of the wall energy storage type building material 9 and an inlet of the floor energy storage type building material 20, and an outlet of the wall energy storage type building material 9 and an outlet of the floor energy storage type building material 20 are respectively connected with an inlet of the buffer water tank 19.
The outlet of the wall embedded PV/T board 13 is connected with the MPPT solar controller 1, the MPPT solar controller 1 is respectively connected with the direct current load 10 and the photovoltaic inverter 12, and the photovoltaic inverter 12 is connected with the alternating current load 11.
The wall embedded PV/T plate 13 is a PV/T plate embedded in a building facade (as shown in figure 3), and comprises a solar cell panel, an EVA (ethylene vinyl acetate) adhesive film, a high-efficiency blowing plate and a heat insulating material from outside to inside, and the contact part of the PV/T plate and the building is packaged by adopting heat insulation aluminum alloy; the wall embedded PV/T plate 13 is formed by laminating a photovoltaic module and a single-side blown-up plate, and the middle of the wall embedded PV/T plate is bonded by EVA (ethylene vinyl acetate) glue, so that the air thermal resistance is effectively reduced, and the heat transfer efficiency is increased; the surface of the wall embedded PV/T plate 13 is coated with a black chromium selective coating by spraying to enhance the absorption capacity; the blowing-up plate is formed by blowing up an all-aluminum plate on a single surface, the top surface is a smooth flat plate, the blowing-up plate is pressed and tightly attached to the back surface of the solar cell panel through EVA (ethylene vinyl acetate) glue, and the bottom surface is a refrigerant flow channel which is a hexagonal and chessboard-shaped coupling flow channel in optimized design; the heat loss to the environment is reduced by arranging a heat insulating material on the inner side of the blowing plate, thereby improving the efficiency of the heat pump.
The energy storage type building material is a sleeve pipe pipeline buried in a floor and coupled with a ground heating pipeline, a heat storage circulating medium 23 (circulating water) is arranged in a sleeve pipe inner pipe 24, a phase change material 22 is sealed in a sleeve pipe outer pipe 21, the inner pipe and the outer pipe are both made of high-heat-conductivity pipes so as to improve the heat exchange performance, and an outer layer maintenance structure adopts common concrete or foam concrete 26 according to actual conditions to realize the heat storage function of the phase change material and the building heat capacity. The common concrete or foam concrete 26 is provided with a solid wood floor or ceramic tile 25 on the upper part and a polystyrene board 27 and building material concrete 28 on the lower part.
The operation method of the solar heat pump system using the building material PV/T plate and the energy storage type building material comprises the following steps:
under the working condition of sunny days, the system takes the wall embedded PV/T plate 13 as a main component and works in a power generation/heat collection/energy storage mode, the refrigerant with low dryness after expansion in the main refrigerant circulating pipeline through the electronic expansion valve 15 absorbs heat generated by the solar cell through the wall embedded PV/T plate 13, so that the heat is absorbed and evaporated, the volume is gradually expanded, the refrigerant flows out from the outlet of the wall embedded PV/T plate 13 and enters the compressor 2, and then the refrigerant is communicated with the heat exchangers (the heat exchanger 5 for the heat collection water tank and the heat exchanger 16 for the buffer water tank) to form closed PV/T heat pump circulation; the temperature of the solar cell panel absorbing heat through the evaporation of the refrigerant is greatly reduced, so that the power generation efficiency is improved, and high-efficiency power generation and heat collection are realized; direct current generated by the solar panel can be used by a direct current load 10 through the MPPT solar controller 1, and the rest of electric energy is converted into alternating current through the photovoltaic inverter 12 and then is merged into a national power grid or provides the power demand of the system; the heat collection water tank 6 exchanges heat with the heat exchanger 5 for the heat collection water tank through a heat exchange pipeline of the domestic heat collection water tank, water is stored in the heat tank, and domestic requirements are met; the energy storage type building material exchanges heat with the heat exchanger 16 for the buffer water tank through the energy storage circulation pipeline, transfers and stores heat in the phase change material and the heat capacity of the building, realizes the functions of peak clipping and valley filling, reduces the occupied area of an additional energy storage device, realizes building integration, and effectively improves the coupling compatibility of the system and the building;
under the working condition of rainy days or nights, the system takes the air-cooled heat exchanger 4 as a main component, works in a heat collection/energy storage mode, a secondary refrigerant circulating pipeline is communicated, the refrigerant with lower dryness after being expanded by the electronic expansion valve 15 absorbs the heat in air or rainwater through the air-cooled heat exchanger 4, so that the heat is absorbed and evaporated, the volume is gradually expanded, the refrigerant flows out from the outlet of the air-cooled heat exchanger 4 and then enters the compressor 12, and the refrigerant is communicated with the heat exchangers (the heat exchanger 5 for the heat collection water tank and the heat exchanger 16 for the buffer water tank) to form the heat pump circulation of; under the working condition, the solar cell panel power generation circuit, the wall embedded PV/T plate and the main refrigerant circulating pipeline do not participate in working, and other components and the circulating pipeline are consistent with the working condition in sunny days; under the working condition, the heat collection and energy storage functions can be realized;
if the solar irradiation intensity is not high, the PV/T plate 13 embedded in the wall and the pipeline of the air-cooled heat exchanger 4 can be opened simultaneously, so that not only solar energy but also air heat energy can be absorbed, the opening degree of the pipeline of the air-cooled heat exchanger 4 connected in parallel is controlled by the electromagnetic valve V1, and the proportion of heat absorption from the photovoltaic module and the air is accurately controlled according to weather conditions;
the electromagnetic valves V2, V6, V7 and V8 are adjusted to control the heat stored in the energy storage type building materials; the electromagnetic valves V3 and V5 are adjusted to control the heat stored in the heat collection water tank 6, and the heat collection water tank 6 is supplemented with water through the electromagnetic valve V4; further, the heat is collected into the heat collecting water tank 6, and if the temperature and the water quantity of the domestic hot water supply are reached, the electromagnetic valve is switched to collect and store the heat into the energy storage type building material.
The working mode can be automatically adjusted according to external conditions, the equipment stability and the utilization rate are high, the energy storage type building materials are used, the working time of the system is effectively shortened, the energy consumption is reduced, the energy-saving effect is obvious, the functions of peak clipping and valley filling of the heat demand of a user are realized, the building integration is realized through the building materials of the energy storage device, the occupied area of additional energy storage equipment is reduced, and the economy and the feasibility of large-scale popularization are improved.
The solar heat pump system using the building material PV/T plate and the energy storage building material can effectively overcome the problems of low comprehensive energy utilization efficiency of the system, unstable system output and extra floor area. The system adopts the high-efficiency direct-expansion PV/T plate and combines the plate with the vertical surface of the building, thereby improving the utilization efficiency of comprehensive energy, integrating the energy storage equipment with the building to form an energy storage type building material, storing energy by utilizing phase change materials and building heat capacity, effectively reducing the occupied area, and realizing the stable output of the system under all-weather conditions all day long by the arrangement of the parallel air-cooled heat exchangers. The system has the advantages of simple equipment composition, high building integration degree, high comprehensive energy utilization rate and obvious energy-saving effect, and has important significance in distributed energy popularization and development of green buildings.
Claims (6)
1. A solar heat pump system using a building material PV/T plate and an energy storage type building material is characterized in that: the system comprises an MPPT solar controller (1), a photovoltaic inverter (12), a main refrigerant circulating pipeline, an auxiliary refrigerant circulating pipeline, a hot water tank circulating pipeline and an energy storage circulating pipeline;
the main refrigerant circulating pipeline and the auxiliary refrigerant circulating pipeline are respectively a PV/T heat pump circulating pipeline and an air-cooled heat exchanger heat pump circulating pipeline, and the PV/T heat pump circulating pipeline is connected with the air-cooled heat exchanger heat pump circulating pipeline in parallel; the PV/T heat pump circulating pipeline comprises a wall embedded PV/T plate (13), a compressor (2), a heat exchanger (5) for a heat collection water tank, a heat exchanger (16) for a buffer water tank and an electronic expansion valve (15), wherein the electronic expansion valve (15) is connected with an inlet of the wall embedded PV/T plate (13), an outlet of the wall embedded PV/T plate (13) is respectively connected with an inlet of the heat exchanger (5) for the heat collection water tank and an inlet of the heat exchanger (16) for the buffer water tank through the compressor (2), and an outlet of the heat exchanger (5) for the heat collection water tank and an outlet of the heat exchanger (16) for the buffer water tank are connected; the air-cooled heat exchanger heat pump circulating pipeline comprises an air-cooled heat exchanger (4), a compressor (2), a heat exchanger (5) for a heat collecting water tank, a heat exchanger (16) for a buffer water tank and an electronic expansion valve (15), wherein the electronic expansion valve (15) is connected with an inlet of the air-cooled heat exchanger (4), and an outlet of the air-cooled heat exchanger (4) is respectively connected with an inlet of the heat exchanger (5) for the heat collecting water tank and an inlet of the heat exchanger (16) for the buffer water tank through the compressor (2);
the heat exchanger (5) for the heat collection water tank is connected with the heat collection water tank (6) through a heat exchange pipeline of the domestic heat collection water tank, the hot water tank circulation pipeline comprises the heat collection water tank (6), a domestic hot water supply end (7) and a tap water replenishing end (8), the inlet of the heat collection water tank (6) is connected with the tap water replenishing end (8), and the outlet of the heat collection water tank (6) is connected with the domestic hot water supply end (7);
the heat exchanger (16) for the buffer water tank is connected with the buffer water tank (19) through an energy storage type building material heat exchange pipeline, the energy storage circulation pipeline comprises the buffer water tank (19), a wall energy storage type building material (9) and a floor energy storage type building material (20), an outlet of the buffer water tank (19) is respectively connected with an inlet of the wall energy storage type building material (9) and an inlet of the floor energy storage type building material (20), and an outlet of the wall energy storage type building material (9) and an outlet of the floor energy storage type building material (20) are respectively connected with an inlet of the buffer water tank (;
an outlet of the wall embedded type PV/T plate (13) is connected with an MPPT solar controller (1), the MPPT solar controller (1) is respectively connected with a direct current load (10) and a photovoltaic inverter (12), and the photovoltaic inverter (12) is connected with an alternating current load (11).
2. The solar heat pump system using a building material PV/T panel and an energy storage building material of claim 1, wherein: the wall embedded PV/T plate (13) is a PV/T plate embedded in a building facade, the PV/T plate comprises a solar cell panel, an EVA (ethylene vinyl acetate) adhesive film, a blowing expansion plate and a heat insulation material from outside to inside, and the contact part of the PV/T plate and the building is packaged by a heat insulation aluminum alloy; the wall embedded PV/T plate (13) is formed by laminating a photovoltaic module and a single-side blown inflation plate, and the photovoltaic module is adhered to the inflation plate through EVA (ethylene vinyl acetate) glue; the surface of the wall embedded PV/T plate (13) is sprayed with an electroplated black chromium selective coating.
3. The solar heat pump system using a building material PV/T panel and an energy storage building material of claim 2, wherein: the blowing-expanding plate is formed by blowing an all-aluminum plate on a single surface, the top surface of the blowing-expanding plate is a flat plate and is pressed and tightly attached to the back surface of the solar cell panel through EVA (ethylene vinyl acetate) glue, the bottom surface of the blowing-expanding plate is a refrigerant flow channel, and the refrigerant flow channel is a hexagonal and chessboard-shaped coupling flow channel; and the inner side of the blowing plate is provided with a heat insulating material.
4. The solar heat pump system using a building material PV/T panel and an energy storage building material of claim 1, wherein: the energy storage type building material is a sleeve pipe pipeline buried in the floor and coupled with the ground heating pipeline, a heat storage circulating medium (23) is arranged in an inner sleeve pipe (24), and a phase change material (22) is arranged in an outer sleeve pipe (21); the outer layer maintenance structure adopts common concrete or foam concrete (26); a solid wood floor or ceramic tile (25) is arranged above the common concrete or the foam concrete (26), and a polystyrene board (27) and building material concrete (28) are arranged below the common concrete or the foam concrete (26).
5. A method of operating a solar heat pump system using a architectured PV/T panel and an energy storing building material according to claim 1, comprising the steps of:
1) under the working condition of sunny days, the system takes the wall embedded PV/T plate (13) as a main component and works in a power generation/heat collection/energy storage mode, the refrigerant with low dryness after being expanded by the electronic expansion valve (15) in the main refrigerant circulating pipeline absorbs heat generated by the solar cell through the wall embedded PV/T plate (13), so that the heat is absorbed and evaporated, the volume is expanded, the refrigerant flows out from the outlet of the wall embedded PV/T plate (13), enters the compressor (2) and is communicated with the heat exchanger to form closed PV/T heat pump circulation; the temperature of the solar cell panel absorbing heat through the evaporation of the refrigerant is reduced, so that power generation and heat collection are realized; direct current generated by the solar panel is supplied to a direct current load (10) through the MPPT solar controller (1), and the rest of electric energy is converted into alternating current through the photovoltaic inverter (12) and then is merged into a national power grid or provides electricity demand of the system; the heat collection water tank (6) exchanges heat with the heat exchanger (5) for the heat collection water tank through a heat exchange pipeline of the domestic heat collection water tank, water is stored in the heat tank, and domestic hot water is supplied; the energy storage type building material exchanges heat with a heat exchanger (16) for a buffer water tank through an energy storage circulation pipeline, heat is transferred and stored in the phase change material and the heat capacity of the building, and peak clipping and valley filling are achieved;
2) under the working condition of rainy days or nights, the system takes the air-cooled heat exchanger (4) as a main component, works in a heat collection/energy storage mode, a secondary refrigerant circulating pipeline is communicated, the refrigerant with low dryness after being expanded by the electronic expansion valve (15) absorbs the heat in the air or rain water through the air-cooled heat exchanger (4), so that the heat is absorbed and evaporated, the volume is expanded, the refrigerant flows out from the outlet of the air-cooled heat exchanger (4), enters the compressor (12) and is communicated with the heat exchanger to form the closed air-cooled heat exchanger heat pump circulation; under the working condition, the solar cell panel power generation circuit, the wall embedded PV/T plate and the main refrigerant circulating pipeline do not participate in working, and other components and the circulating pipeline are consistent with the working condition in sunny days; under the working condition, heat collection and energy storage are realized;
3) if the solar irradiation intensity is not high, the pipelines of the wall embedded PV/T plate (13) and the air-cooled heat exchanger (4) are opened simultaneously, so that not only solar energy but also air heat energy are absorbed, the opening degree of the pipelines of the air-cooled heat exchanger (4) connected in parallel is controlled by an electromagnetic valve V1, and the proportion of heat absorption from the photovoltaic module and the air is controlled according to weather conditions;
4) adjusting the electromagnetic valves V2, V6, V7 and V8 to control the heat stored in the energy storage type building materials; the electromagnetic valves V3 and V5 are adjusted to control the heat stored in the heat collecting water tank (6), and the heat collecting water tank (6) is supplemented with water through the electromagnetic valve V4.
6. The method of operating a solar heat pump system using a building material PV/T panel and an energy storage building material of claim 5, wherein: and 4), collecting heat into the heat collection water tank (6), and switching the electromagnetic valve to collect and store the heat into the energy storage type building material if the temperature and the water quantity of the domestic hot water supply are reached.
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| CN111536573B (en) * | 2020-04-30 | 2024-01-30 | 水发兴业能源(珠海)有限公司 | Solar water heating device and control method thereof |
| CN111609568A (en) * | 2020-06-05 | 2020-09-01 | 上海交通大学 | Building combined heat and power generation and humidity regulation system based on photovoltaic photo-thermal component |
| CN114562764A (en) * | 2022-02-21 | 2022-05-31 | 西安交通大学 | Building chimney effect natural ventilation strengthening system and method |
| CN114413508A (en) * | 2022-02-24 | 2022-04-29 | 山东鑫光节能科技有限公司 | Photo-thermal evaporator air source heat pump |
| CN114413509A (en) * | 2022-02-24 | 2022-04-29 | 山东鑫光节能科技有限公司 | Double-source heat pump capable of efficiently utilizing solar energy and air energy |
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Application publication date: 20200407 |