CN114543217A - Embedded pipe type phase change enclosure structure system cooled by solar energy and sky radiation - Google Patents

Embedded pipe type phase change enclosure structure system cooled by solar energy and sky radiation Download PDF

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Publication number
CN114543217A
CN114543217A CN202210216610.XA CN202210216610A CN114543217A CN 114543217 A CN114543217 A CN 114543217A CN 202210216610 A CN202210216610 A CN 202210216610A CN 114543217 A CN114543217 A CN 114543217A
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heat exchange
exchange tube
phase
heat
branch
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李永财
施旭辉
龙天河
赵宁晶
张亚芹
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Chongqing University
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Chongqing University
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Priority to CN202210216610.XA priority Critical patent/CN114543217A/en
Publication of CN114543217A publication Critical patent/CN114543217A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
    • F24F5/0021—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice using phase change material [PCM] for storage
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/02—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls built-up from layers of building elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/14—Solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
    • F24F2005/0032—Systems storing energy during the night
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
    • 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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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Architecture (AREA)
  • Thermal Sciences (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Sustainable Development (AREA)
  • Electromagnetism (AREA)
  • Sustainable Energy (AREA)
  • Building Environments (AREA)

Abstract

The invention discloses a tube-embedded phase-change enclosure structure system cooled by solar energy and sky radiation, which comprises a phase-change energy storage wall body and a plate heat exchanger, wherein the plate heat exchanger is provided with a first heat exchange tube, and two ends of the first heat exchange tube respectively extend out of the upper end and the lower end of the plate heat exchanger to respectively form an upper interface and a lower interface; a second heat exchange tube is embedded in the phase change energy storage mortar layer of the phase change energy storage wall body, and two ends of the second heat exchange tube respectively extend out of the upper end and the lower end of the phase change energy storage wall body to form a first interface and a second interface; the first interface is communicated with the upper interface through a first pipeline, the second interface is communicated with the lower interface through a first branch pipeline, and a first check valve is arranged on the first branch pipeline; including the second branch road, the both ends of second branch road are located first check valve both sides with the both ends of first branch road intercommunication and second branch road respectively, are equipped with reservoir, circulating pump and second check valve in the second branch road. The system can fully utilize solar energy and sky radiation to cool natural energy, and reduce the energy consumption of building heating air conditioners.

Description

Embedded pipe type phase change enclosure structure system cooled by solar energy and sky radiation
Technical Field
The invention belongs to the technical field of building energy conservation, and particularly relates to a pipe-embedded phase-change building envelope system cooled by solar energy and sky radiation.
Background
With the proposition of concepts such as environmental protection and sustainable development, energy conservation and low carbon are developed to be a global consensus. According to the statistics of the international energy agency, the energy consumption of the buildings in the world approximately accounts for 35-40% of the energy consumption. The heat preservation and insulation performance of the building envelope structure has important influence on the building energy consumption, and the improvement of the thermal performance of the building envelope structure from the demand side is a method for effectively reducing the cold and heat loads of the building. The embedded pipe type enclosure structure is an energy-saving enclosure structure form in which a circulation pipeline system is embedded into the enclosure structure, and the heat insulation and refrigeration of the enclosure structure in summer and the heat preservation of the enclosure structure in winter can be realized by utilizing the circulation of a heat transfer working medium in the pipeline, so that the indoor thermal environment is improved.
Solar energy has been widely used as a clean renewable energy source, and the utilization of solar heat is the most widely used form of solar energy at present. The installation of a solar heat collector on a roof to provide heat energy for a building is a main scheme for successfully utilizing renewable energy sources to realize energy conservation. But since there is no radiation at night, the solar collector is always idle at night. The sky radiation cooling technology is a novel cooling technology which is started in recent years, and the sky radiation cooling technology discharges heat to a cold outer space of the sky by utilizing radiation heat exchange, so that an efficient refrigeration process is realized. The radiation cooling heat collector manufactured based on the method is also generally manufactured into a flat plate structure and is applied to the fields of photovoltaic cell panel cooling, building ventilation cooling and the like.
At present, both flat-plate solar collectors and radiation cooling collectors have respective limitations and cannot fully utilize two freely-obtained natural cold and heat sources, namely solar energy and sky radiation cooling.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the pipe-embedded phase-change building envelope system cooled by solar energy and sky radiation, which can fully utilize the solar energy and the sky radiation to cool natural energy, and can greatly reduce the energy consumption of heating and air conditioning of a building while creating a comfortable indoor thermal environment.
The technical scheme of the invention is realized as follows:
the tube-embedded phase-change envelope system cooled by solar energy and sky radiation comprises a phase-change energy storage wall body and a solar heat collection-sky radiation cooling integrated plate heat exchanger obliquely arranged on a building roof, wherein the solar heat collection-sky radiation cooling integrated plate heat exchanger is provided with a first heat exchange tube, two ends of the first heat exchange tube respectively extend out of the upper end and the lower end of the solar heat collection-sky radiation cooling integrated plate heat exchanger, an upper connector is positioned at the upper end, and a lower connector is positioned at the lower end.
The phase change energy storage wall body includes aerated concrete block layer and phase change energy storage mortar layer, the setting of phase change energy storage mortar layer is inboard at aerated concrete block layer, has inlayed the second heat exchange tube in the phase change energy storage mortar layer, and both ends are stretched out phase change energy storage wall body upper and lower both ends respectively at the both ends of second heat exchange tube, and wherein be located the upper end for first interface, be located the lower extreme for the second interface.
The first connector and the upper connector are communicated through a first pipeline, the second connector and the lower connector are communicated through a first branch, and a first check valve is arranged on the first branch to prevent circulating working media in the second heat exchange pipe from flowing into the first heat exchange pipe through the first branch.
Still include the second branch road, the both ends of second branch road are located first check valve both sides with the both ends of first branch road intercommunication and second branch road respectively, are equipped with reservoir, circulating pump and second check valve on the second branch road, the reservoir is used for storing cycle fluid, and the circulating pump is used for the cycle fluid pump income first heat exchange tube in the reservoir, the second check valve is used for preventing the cycle fluid in the first heat exchange tube from flowing into the second heat exchange tube through the second branch road.
Furthermore, the first heat exchange tube and the second heat exchange tube both comprise a plurality of heat exchange tubes horizontally arranged at intervals, and all the heat exchange tubes corresponding to the first heat exchange tube and the second heat exchange tube are respectively communicated with each other to form a snake-shaped structure.
Furthermore, the solar heat collection-sky radiation cooling integrated plate heat exchanger comprises a box body with an open top surface, a transparent cover plate is arranged on the top surface of the box body to seal the top surface of the box body, and the first heat exchange tube is arranged in the box body.
Further, the bottom of the box body is sequentially sprayed with a layer of titanium-based solar radiation selective absorber and a layer of polyethylene glycol terephthalate from bottom to top.
Further, the phase change energy storage wall body still includes the heated board, the heated board is located the aerated concrete block layer outside.
Furthermore, the first heat exchange tube, the second heat exchange tube, the first pipeline, the first branch and the second branch are all made of heat tubes, and heat preservation layers are coated outside the first pipeline, the first branch and the second branch.
Furthermore, the inclination angle of the solar heat collection-sky radiation cooling integrated plate heat exchanger is 30-50 ℃.
Further, the phase change temperature of the phase change material is 22-27 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1. the solar energy heat collection-sky radiation cooling integrated plate type heat exchanger is coupled with the phase change energy storage wall body, solar energy and sky radiation cooling are fully utilized, latent heat of the phase change material is fully exerted, heat storage and release capacity of the building wall body is improved, building refrigeration or heating load is reduced, indoor thermal environment of the building is improved, and the purpose of building energy conservation is achieved.
2. By utilizing the system, the circulating working medium in the system does not circulate in summer daytime and winter night, the heat inertia of the phase change energy storage wall is increased by latent heat of the phase change material in the phase change energy storage wall, the refrigeration or heating load of a building is reduced, the indoor thermal environment of the building is improved, and the purpose of building energy conservation is achieved; at night in summer, the solar heat collection-sky radiation cooling integrated plate heat exchanger performs radiation heat exchange with low-temperature deep space, and the circulating working medium passively exchanges heat with a liquid phase-change material in the wall body by means of self gravity, so that the phase-change material is gradually solidified into a solid state for use in the daytime in the next day, and meanwhile, the temperature of the inner surface of the wall body is also reduced, and indoor cooling comfort is guaranteed; in winter and daytime, the circulating pump is started, the plate heat exchanger collects heat, the circulating working medium enters the phase change energy storage wall body under the driving of the circulating pump and exchanges heat with the phase change material in the phase change energy storage wall body, and the phase change material melts and stores heat for indoor heating at night.
Drawings
Fig. 1-a schematic perspective view of the present invention.
Fig. 2-schematic side view of the present invention.
Fig. 3-schematic structural diagram under different operating conditions.
Wherein: 1-solar energy collection-sky radiation cooling integrated plate heat exchanger; 11-a first heat exchange tube; 2-a phase change energy storage wall body; 21-a second heat exchange tube; 22-phase change energy storage mortar layer; 23-aerated concrete block layer; 24-a heat-insulating board; 3-a first pipeline; 4-a first branch; 5-a first check valve; 6-a second branch; 7-a reservoir; 8-a circulating pump; 9-second check valve.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the pipe-embedded phase-change building envelope system cooled by solar energy and sky radiation comprises a phase-change energy storage wall 2 and a solar heat collection-sky radiation cooling integrated plate heat exchanger 1 obliquely arranged on a building roof, wherein the solar heat collection-sky radiation cooling integrated plate heat exchanger 1 is provided with a first heat exchange pipe 11, two ends of the first heat exchange pipe 11 are respectively located at the upper end and the lower end of the solar heat collection-sky radiation cooling integrated plate heat exchanger 1, an upper connector is located at the upper end, and a lower connector is located at the lower end.
The phase change energy storage wall body 2 comprises an aerated concrete block layer 23 and a phase change energy storage mortar layer 22, the phase change energy storage mortar layer 21 is arranged on the inner side of the aerated concrete block layer 23, a second heat exchange tube 21 is embedded in the phase change energy storage mortar layer, the two ends of the second heat exchange tube respectively extend out of the upper end and the lower end of the phase change energy storage wall body, a first connector is arranged at the upper end of the second heat exchange tube, and a second connector is arranged at the lower end of the second heat exchange tube.
The first connector and the upper connector are communicated through a first pipeline 3, the second connector and the lower connector are communicated through a first branch 4, and a first check valve 5 is arranged on the first branch 4, so that the circulating working medium in the second heat exchange tube 21 is prevented from flowing into the first heat exchange tube 11 through the first branch 4.
Still include second branch road 6, the both ends of second branch road 6 are located 5 both sides of first check valve with 4 intercommunications of first branch road and the both ends of second branch road 6 respectively, are equipped with reservoir 7, circulating pump 8 and second check valve 9 on the second branch road 6, reservoir 7 is used for storing cycle fluid, and circulating pump 9 is used for pumping the cycle fluid in the reservoir 8 into first heat exchange tube 11, second check valve 9 is used for preventing the cycle fluid in the first heat exchange tube 11 from flowing into second heat exchange tube 21 through second branch road 6.
The liquid storage device is arranged to store liquid circulating working media and serve as a gas-liquid separator to ensure that all the liquid circulating working media entering the circulating pump are liquid circulating working media in the working state of the circulating pump. The circulating pump adopted in the embodiment is a self-suction magnetic pump.
Therefore, a closed circulating pipeline is formed by the first heat exchange pipe, the first pipeline, the second heat exchange pipe of the phase change energy storage wall body and the first branch of the solar heat collection-sky radiation cooling integrated plate type heat exchanger; the first heat exchange tube, the first pipeline, the second heat exchange tube and the second branch of the phase change energy storage wall body of the solar heat collection-sky radiation cooling integrated plate type heat exchanger form another closed circulation pipeline.
During specific implementation, the first heat exchange tube 11 and the second heat exchange tube 21 both comprise a plurality of heat exchange tubes horizontally arranged at intervals, and all the heat exchange tubes corresponding to the first heat exchange tube 11 and the second heat exchange tube 21 are respectively communicated with each other to form a snake-shaped structure.
During specific implementation, the solar heat collection-sky radiation cooling integrated plate heat exchanger 1 comprises a box body with an open top surface, a transparent glass cover plate is arranged on the top surface of the box body to seal the top surface of the box body, and the first heat exchange tube 11 is arranged in the box body.
The specific implementation is that a layer of titanium-based solar radiation selective absorbent and a layer of polyethylene glycol terephthalate are sequentially sprayed on the bottom of the box body from bottom to top.
Therefore, the solar heat collection-sky radiation cooling integrated plate type heat exchanger serves as a sky radiation refrigerating device in summer and serves as a solar heat collection device in winter and daytime. In order to ensure the heat preservation effect, heat preservation cotton can be wrapped at the bottom and the periphery of the box body of the solar heat collection-sky radiation cooling integrated plate heat exchanger.
In specific implementation, the phase change energy storage wall 2 further comprises an insulation board 24, and the insulation board 24 is arranged on the outer side of the aerated concrete block layer 23.
During specific implementation, the first heat exchange tube 11, the second heat exchange tube 21, the first pipeline 3, the first branch 4 and the second branch 6 are all made of heat tubes, and the first pipeline 3, the first branch 4 and the second branch 6 are coated with heat preservation layers.
The heat exchange effect of the heat pipe is good, and the heat exchange efficiency of the system can be effectively improved.
During specific implementation, the inclination angle of the solar heat collection-sky radiation cooling integrated plate heat exchanger is 30-50 ℃.
In practical application, the installation gradient of the solar heat collection-sky radiation cooling integrated plate heat exchanger can be adaptively adjusted, and sunlight is ensured to directly penetrate into the solar heat collection-sky radiation cooling integrated plate heat exchanger as much as possible.
In specific implementation, the phase change temperature of the phase change material is 22-27 ℃.
Fig. 3 is a schematic diagram of four different operating conditions of the system, specifically:
working condition one (winter daytime): as shown in fig. 3 (b), the circulating pump is started, the solar radiation heats the circulating medium in the first heat exchange tube of the solar heat collection-sky radiation cooling integrated plate heat exchanger, and under the driving of the circulating pump, the circulating medium enters the phase change energy storage wall body, the circulating medium releases heat in the phase change energy storage wall body, and exchanges heat with the phase change material in the phase change energy storage wall body, after the phase change material absorbs heat and melts, the temperature of the wall surface continuously rises, so that when the heat is lost outdoors through the phase change energy storage wall body in the indoor environment of the barrier, the indoor heat supply can be realized, the heat load demand of the room is reduced, and the indoor thermal comfort is improved.
Working condition two (winter night): as shown in fig. 3 (d), the circulation pump is turned off, the circulation working medium in the system does not circulate, and as the temperature decreases, the phase-change material in the phase-change energy storage wall body can be gradually solidified and release heat, so that the temperature of the inner surface of the phase-change energy storage wall body is ensured, the indoor thermal comfort is ensured, and the heat loss of the indoor environment through the phase-change energy storage wall body is reduced.
Working condition three (summer daytime): as shown in fig. 3 (a), the circulation pump is turned off, the circulation working medium in the system does not circulate, the temperature of the phase change energy storage wall body rises under the comprehensive influence of outdoor radiation and air temperature, the phase change material in the phase change energy storage wall body gradually melts and absorbs heat, the temperature stability of the inner surface of the phase change energy storage wall body is maintained, external heat is prevented from entering the room through the phase change energy storage wall body, the indoor cooling comfort is ensured, and the indoor cooling load is reduced.
Working condition four (summer night): as shown in fig. 3 (c), the circulation pump is turned off, the system is in a passive operation state, and the driving force of the system is derived from the pressure difference between the gas-phase working medium and the liquid-phase working medium. The solar heat collection-sky radiation cooling integrated plate heat exchanger exchanges heat with deep space, a circulating working medium in the first heat exchange tube is gradually condensed into liquid, and flows into the second heat exchange tube in the phase change energy storage wall body and the liquid phase change material in the phase change energy storage wall body through the first branch for heat exchange under the action of gravity, so that the phase change material is gradually condensed into solid for use in the next day, meanwhile, the temperature of the inner surface of the wall body is also reduced, and the indoor cooling comfort is ensured.
Finally, it should be noted that the above-mentioned examples of the present invention are only examples for illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. Obvious changes and modifications of the present invention are also within the scope of the present invention.

Claims (8)

1. The solar heat collection-sky radiation cooling integrated plate type heat exchanger is provided with a first heat exchange tube, two ends of the first heat exchange tube respectively extend out of the upper end and the lower end of the solar heat collection-sky radiation cooling integrated plate type heat exchanger, wherein the upper end is an upper interface, and the lower end is a lower interface;
the phase change energy storage wall comprises an aerated concrete block layer and a phase change energy storage mortar layer, the phase change energy storage mortar layer is arranged on the inner side of the aerated concrete block layer, a second heat exchange tube is embedded in the phase change energy storage mortar layer, two ends of the second heat exchange tube respectively extend out of the upper end and the lower end of the phase change energy storage wall, wherein a first connector is positioned at the upper end, and a second connector is positioned at the lower end;
the first interface is communicated with the upper interface through a first pipeline, the second interface is communicated with the lower interface through a first branch, and a first check valve is arranged on the first branch to prevent the circulating working medium in the second heat exchange tube from flowing into the first heat exchange tube through the first branch;
still include the second branch road, the both ends of second branch road are located first check valve both sides with the both ends of first branch road intercommunication and second branch road respectively, are equipped with reservoir, circulating pump and second check valve on the second branch road, the reservoir is used for storing cycle fluid, and the circulating pump is used for the cycle fluid pump income first heat exchange tube in the reservoir, the second check valve is used for preventing the cycle fluid in the first heat exchange tube from flowing into the second heat exchange tube through the second branch road.
2. The tube-embedded phase-change enclosure system utilizing solar energy and sky radiation for cooling according to claim 1, wherein the first heat exchange tube and the second heat exchange tube each comprise a plurality of heat exchange tubes horizontally arranged at intervals, and all the heat exchange tubes corresponding to the first heat exchange tube and the second heat exchange tube are respectively communicated with each other to form a serpentine structure.
3. The tube-embedded phase-change enclosure system using solar energy and sky radiation for cooling according to claim 1, wherein the solar heat collection-sky radiation cooling integrated plate heat exchanger comprises a box body with an open top surface, a transparent cover plate is arranged on the top surface of the box body to seal the top surface of the box body, and the first heat exchange tube is arranged in the box body.
4. The tube-embedded phase-change building envelope system using solar energy and sky radiation for cooling according to claim 3, wherein the bottom of the box body is coated with a titanium-based solar radiation selective absorber and a polyethylene terephthalate layer from bottom to top.
5. The tube-embedded phase-change building envelope system cooled by solar energy and sky radiation of claim 1, wherein the phase-change energy storage wall further comprises an insulation board, and the insulation board is arranged outside the aerated concrete block layer.
6. The tube-embedded phase-change building envelope system utilizing solar energy and sky radiation for cooling according to claim 1, wherein the first heat exchange tube, the second heat exchange tube, the first pipeline, the first branch and the second branch are all made of heat pipes, and the first pipeline, the first branch and the second branch are externally coated with heat insulation layers.
7. The tube-embedded phase-change building envelope system utilizing solar energy and sky radiation cooling of claim 1, wherein the inclination angle of the solar heat collection-sky radiation cooling integrated plate heat exchanger is 30-50 ℃.
8. The tube-embedded phase-change building envelope system cooled by solar energy and sky radiation of claim 1, wherein the phase-change temperature of the phase-change material is 22 ℃ to 27 ℃.
CN202210216610.XA 2022-03-07 2022-03-07 Embedded pipe type phase change enclosure structure system cooled by solar energy and sky radiation Pending CN114543217A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115200111A (en) * 2022-06-07 2022-10-18 河北工业大学 Passive ventilation system combining solar chimney structure and radiation refrigeration

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CN107130694A (en) * 2016-02-29 2017-09-05 华中科技大学 Wall auto accumulation heat heat release and realize the automatic heat-insulated method of wall using it
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