CN110836430B - Novel passive air conditioning system and energy storage and release method thereof - Google Patents
Novel passive air conditioning system and energy storage and release method thereof Download PDFInfo
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- CN110836430B CN110836430B CN201911305716.1A CN201911305716A CN110836430B CN 110836430 B CN110836430 B CN 110836430B CN 201911305716 A CN201911305716 A CN 201911305716A CN 110836430 B CN110836430 B CN 110836430B
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 57
- 238000004146 energy storage Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 286
- 230000005855 radiation Effects 0.000 claims abstract description 118
- 230000001105 regulatory effect Effects 0.000 claims abstract description 107
- 238000005057 refrigeration Methods 0.000 claims abstract description 99
- 238000001816 cooling Methods 0.000 claims abstract description 31
- 238000009423 ventilation Methods 0.000 claims abstract description 21
- 238000009825 accumulation Methods 0.000 claims description 51
- 239000011232 storage material Substances 0.000 claims description 30
- 230000009471 action Effects 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 11
- 239000012774 insulation material Substances 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000001228 spectrum Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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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
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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
- F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
- F25B23/003—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect using selective radiation effect
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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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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
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- Other Air-Conditioning Systems (AREA)
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Abstract
The invention discloses a novel passive air conditioning system and an energy storage and release method thereof, and belongs to the technical field of passive energy utilization. The novel passive air conditioning system and the energy storage and release method thereof comprise a terminal device, an air conditioning room, a cold storage water tank, a radiation refrigeration module, an electric regulating valve and a water pump. The invention combines the air conditioner end device, the passive cooling ventilation roof and the radiation refrigeration technology to form a novel air conditioner system, and utilizes the characteristics of free cold energy obtained by heat exchange between the radiation refrigeration film and the outer space to fully utilize natural cold sources and reduce the energy consumption of the air conditioner system. Meanwhile, the system can realize night energy storage and daytime energy release, so that peak-valley load is regulated, and the economical type of equipment operation is improved.
Description
Technical Field
The invention belongs to the technical field of passive energy utilization, and particularly relates to a novel passive air conditioning system and an energy storage and release method thereof.
Background
The heating ventilation air conditioning system is necessary facilities and systems required by life of people in twenty-first century, plays an important role in playing a building function, consumes energy and has a certain influence on the environment when being used, and the energy consumption caused by the heating ventilation air conditioning system exacerbates the contradiction between energy supply and demand in the present day of energy shortage. The problem of energy consumption is also of great concern, and energy conservation and consumption reduction are important points of human attention. In order to meet the increasing demands for thermal comfort and indoor air quality, more than 50% of the total energy of the building is consumed by the air conditioning system, and therefore energy saving optimization of the air conditioning system is of great significance in reducing the energy consumption of the air conditioner, reducing the energy consumption of the building, and thus alleviating the energy problem. Radiant refrigeration is receiving increasing attention as a passive cooling technology because it is possible to obtain "free" cooling without any electric power, which is of great importance to reduce the energy consumption of conventional air conditioning systems. Recently, a radiation refrigeration film has been proposed which radiates heat to the outside space through an "atmospheric window" (8-13 um band) and reduces the surface temperature of the film to below ambient temperature by radiation heat exchange. If the air conditioning system and the radiation refrigeration film can be integrated, a brand new air conditioning system is formed, the efficiency of the system or equipment can be effectively improved, the energy consumption of the air conditioning system is reduced, and the energy saving effect is achieved.
In the prior art of air conditioning system, the patent CN103591721a discloses an air conditioning system, in which the refrigerant flowing out from an evaporator flows back to a heat exchange heater to be evaporated again, so that the refrigerant is guaranteed to return to a compressor after being evaporated fully, the efficiency of the whole air conditioning system is improved, the compressor is prevented from being damaged by liquid impact, and a plurality of heat exchange grooves which are arranged regularly are arranged on heat exchange plates of the evaporator and the overheat heat exchanger and used for flowing heat exchange medium, so that the heat exchange area is increased, and the heat exchange efficiency is improved. In addition, the patent CN110057004a is a novel air conditioning system and complete equipment thereof, which organically combines the radiation refrigeration technology, the solar heat collection technology and the traditional air conditioning technology, fully utilizes the solar radiation heat and the cold energy of outer space, flexibly switches the refrigeration and heating functions according to the user demands, flexibly switches the air supply modes of various air conditioners according to the user demands, not only satisfies the air supply under various conditions, but also further reduces the energy consumption of the building.
The invention discloses a novel passive air conditioning system and an energy storage and release method thereof, compared with patent CN103591721A and patent CN110057004A, the novel air conditioning system combines the end devices of radiation refrigeration and passive cooling ventilation roofing, obtains cold energy by utilizing radiation refrigeration film and outer space heat exchange, fully utilizes natural cold source, can save a large amount of energy sources and accords with the energy saving concept of green buildings; meanwhile, the invention can store energy at night and release energy in daytime, thereby adjusting peak-valley load and improving the economical type of equipment operation.
Disclosure of Invention
The invention provides a novel passive air conditioning system and an energy storage and release method thereof, and the first aim of the invention is to combine an air conditioning terminal device, a passive cooling ventilation roof and a radiation refrigeration technology to form a novel passive air conditioning system, and the novel passive air conditioning system is characterized in that the additional cold energy generated by a radiation refrigeration film is obtained, and the cold energy is sent into a room through the terminal device, so that the indoor temperature is changed, and the energy consumption of the air conditioning system is further reduced; a second object of the invention relates to a method of accumulating and releasing energy.
In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:
the first technical scheme for realizing the first purpose of the invention is to provide a novel passive air conditioning system and an energy storage and release method thereof, wherein the system comprises: the system comprises a tail end device, an air conditioning room, a cold accumulation water tank, a radiation refrigeration module, a first electric regulating valve, a second electric regulating valve, a third electric regulating valve, a fourth electric regulating valve, a fifth electric regulating valve, a sixth electric regulating valve, a seventh electric regulating valve, an eighth electric regulating valve, a first water pump and a second water pump; the tail end device is formed by combining a fan, a heat exchange coil, a tail end air supply port, a tail end first air return port and a tail end second air return port; the air-conditioning room comprises a first air return port, a second air return port, a third air return port, a fourth air return port, an air channel a, an air channel b, an air channel c and a radiation refrigeration film, wherein air valves are arranged at all the air ports, and the air channel, the radiation refrigeration film and a roof are integrated into a passive cooling ventilation roof; the radiation refrigeration module comprises a radiation refrigeration film, a module water inlet pipe, a cavity, a module water outlet pipe, a heat insulation material, a phase change energy storage material and a module coil pipe;
as a preferred example, the connection modes of the components of the novel passive air conditioning system and the energy storage and release method thereof are as follows:
the module water outlet pipe of the radiation refrigeration module is connected with the water inlet of the first pipeline, the water outlet of the first pipeline is connected with the water inlet of the second pipeline, the first water outlet of the second pipeline is connected with the water inlet of the third pipeline, the water outlet of the third pipeline is connected with the water inlet of the fourth pipeline, the water outlet of the fourth pipeline is connected with the water inlet of the heat exchange coil pipe in the tail end device, the third electric regulating valve is arranged on the fourth pipeline, and the eighth electric regulating valve is arranged on the first pipeline;
the water outlet of the heat exchange coil in the tail end device is connected with the water inlet of a fifth pipeline, the first water outlet of the fifth pipeline is connected with the water inlet of a sixth pipeline, the water outlet of the sixth pipeline is connected with the water inlet of a seventh pipeline, the water outlet of the seventh pipeline is connected with the first water inlet of an eighth pipeline, the water outlet of the eighth pipeline is connected with a module water inlet pipe of the radiation refrigeration module, the first electric regulating valve is arranged on the fifth pipeline, the second electric regulating valve is arranged on the sixth pipeline, the seventh electric regulating valve is arranged on the eighth pipeline, and the first water pump is arranged on the fifth pipeline;
the second water outlet of the second pipeline is connected with the water inlet of the ninth pipeline, the water outlet of the ninth pipeline is connected with the first port of the cold accumulation water tank, and the fourth electric regulating valve is arranged on the ninth pipeline;
the second port of the cold accumulation water tank is connected with the water inlet of a tenth pipeline, the water outlet of the tenth pipeline is connected with the second water inlet of an eighth pipeline, and the sixth electric regulating valve and the second water pump are both arranged on the tenth pipeline;
the second water outlet of the fifth pipeline is connected with the water inlet of the eleventh pipeline, the water outlet of the eleventh pipeline is connected with the third port of the cold accumulation water tank, and the fifth electric regulating valve is arranged on the eleventh pipeline.
The water supplementing pipe is connected with a fourth port of the cold accumulation water tank.
As a preferred example, the surface of the radiation refrigeration module facing the sky is stuck with a radiation refrigeration film, the other surfaces are stuck with heat insulation materials, a module water inlet pipe is connected with a module coil water inlet in the cavity, an outlet of the module coil is connected with a module water outlet, a phase-change energy storage material is filled in the cavity, the cold energy generated by the radiation refrigeration module is provided by n radiation refrigeration modules, and n is an integer greater than or equal to 1.
As a preferred example, the emissivity of the radiation refrigeration film is greater than 0.90 in the 8-13um band and greater than 0.90 in the 0.25-3um band; the radiation chilling film may be one of a nano-photo-excited selective film, a metamaterial spectrum selective film, or a radiation chilling coating.
The second technical proposal for realizing the invention is to provide a novel passive air conditioning system and a method for storing and releasing energy thereof, including a method for storing energy at night and releasing energy at daytime,
the night energy storage method adopts one of the following methods:
the method comprises the following steps: when the indoor temperature of the night is in the range of 27-32 ℃, the temperature in the air-conditioning room is mainly regulated by a passive cooling ventilation roof, at the moment, a first electric regulating valve, a second electric regulating valve, a third electric regulating valve, a fifth electric regulating valve and a first water pump are closed, a fourth electric regulating valve, a sixth electric regulating valve, a seventh electric regulating valve, an eighth electric regulating valve and a second water pump are opened, as the required cold energy in the air-conditioning room is less, air valves of a third air return port and a fourth air return port of the room are opened, the first air return port, the second air return port of the room and the air valves of a first air return port and a second air return port of the tail end are closed, indoor air enters the first air channel and the second air return port of the room from the third air return port and the fourth air return port of the room respectively, the radiation refrigeration film of the roof exchanges heat with external space to obtain cold energy, the cold energy is transferred to the air in the first air channel and the second air channel, the air temperature in the first air channel and the second air channel is reduced, the cooled cold air in the first air channel and the second air channel is introduced into the air channel at the tail end of the room through the air channel, and the indoor air is cooled air enters the air-conditioning air outlet at the tail end of the room through the fan;
after the radiation refrigeration film on the surface of the radiation refrigeration module exchanges heat with the outer space to obtain cold energy, the cold energy is stored in the phase-change energy storage material, the water flowing through the coil pipe of the module exchanges heat with the phase-change energy storage material to obtain cold energy, the temperature is reduced, cold water flows out of the water outlet pipe of the module and flows into the cold storage water tank through the first pipeline, the second pipeline and the ninth pipeline, water with higher temperature in the water tank flows into the radiation refrigeration module through the tenth pipeline and the eighth pipeline under the action of the second water pump, the second water pump stops working after the cold energy stored by the radiation refrigeration module is completely conveyed to the cold storage water tank through the water in the cold storage water tank, at the moment, the radiation refrigeration module stores cold again through the phase-change energy storage material, and when the temperature in the phase-change energy storage material is lower than the temperature of the water in the cold storage water tank, the second water pump works again, and the cold energy stored by the radiation refrigeration module is conveyed into the cold storage water tank.
The second method is as follows: when the indoor temperature at night is in the range of 33-40 ℃, the cold energy generated by the passive cooling ventilation roof cannot meet the indoor thermal comfort, at this time, part of the cold energy of an air-conditioning room is provided by the passive cooling ventilation roof, the other part of the cold energy is provided by the radiation refrigeration module, the first electric control valve, the second electric control valve, the third electric control valve, the fourth electric control valve, the sixth electric control valve, the seventh electric control valve, the eighth electric control valve, the first water pump and the second water pump are opened, the fifth electric control valve is closed, all air valves of all air inlets are opened, indoor air enters the first air duct and the second air duct from the third air return opening and the fourth air return opening of the room respectively, the radiation refrigeration film of the roof performs radiation heat exchange with the outer space to obtain cold energy, the cold energy is transferred to air in the first air duct and the second air duct, the air temperature of the cooled air in the first air duct and the second air duct is reduced, the cooled cold air enters the tail end device after the third air duct is converged, and the other part of the air enters the tail end device from the first air return opening and the second air return opening of the room, and the tail end of the room enters the tail end device from the third air return opening and the tail end air return opening of the room;
the radiation refrigeration film on the surface of the radiation refrigeration module obtains cold energy through radiation heat exchange with outer space, the cold energy is stored in the phase-change energy storage material, the water flowing through the module coil is subjected to heat exchange with the phase-change energy storage material to obtain cold energy, the temperature is reduced, after cold water flows out of the module water outlet pipe and passes through the first pipeline and the second pipeline, part of cold water flows into the heat exchange coil of the tail end device through the third pipeline and the fourth pipeline, the temperature is reduced after the air in the tail end device exchanges heat with the heat exchange coil, the air is sent into a room under the action of a fan, so that the indoor temperature is reduced, and the heat-exchanged hot water flows out of the output end of the heat exchange coil, passes through the fifth pipeline, the sixth pipeline, the seventh pipeline and the eighth pipeline and then flows back into the radiation refrigeration module;
the other part of cold water flows into the cold accumulation water tank through the ninth pipeline, and water with higher temperature in the water tank flows into the radiation refrigeration module through the tenth pipeline and the eighth pipeline under the action of the second water pump;
after the cold accumulation amount of the radiation refrigeration module is completely conveyed to the cold accumulation water tank through water in the cold accumulation water tank, the second water pump stops working, at the moment, the radiation refrigeration module performs cold accumulation again through the phase change energy storage material, and when the temperature in the phase change energy storage material is lower than the temperature of the water in the cold accumulation water tank, the second water pump works again to convey the cold accumulation amount of the radiation refrigeration module to the cold accumulation water tank (3).
The daytime energy release method comprises the following steps:
when the indoor temperature is in the range of 28-35 ℃ in daytime, under the action of a passive cooling ventilation roof, the indoor heat comfort is not enough, the first electric regulating valve, the third electric regulating valve, the fourth electric regulating valve, the fifth electric regulating valve and the first water pump are opened, the second electric regulating valve, the sixth electric regulating valve, the seventh electric regulating valve, the eighth electric regulating valve and the second water pump are closed, the air valves of all the air inlets are opened, at the moment, indoor air enters the first air channel and the second air channel respectively from the third air return opening and the fourth air return opening of the room, the radiation refrigeration film of the roof performs radiation heat exchange with the outer space to obtain cold energy, and the cold energy is transferred to air in the first air channel and the second air channel, so that the air temperature in the first air channel and the second air channel is reduced, the cooled cold air enters the terminal device after being converged in the third air channel, and the other part of the air enters the terminal device from the first air return opening and the second air inlet of the terminal, and flows out of the first air return opening and the second air inlet of the terminal device, and the indoor air flows back to the heat exchange tube through the heat exchange tube, the air tank and the heat exchange tube of the air exchange tube of the indoor heat exchange tube is reduced, and the air exchange tube of the cold water flows into the air exchange tube of the indoor heat exchange tube is reduced, and the indoor heat exchange tube is cooled air, and the air exchange tube is cooled down;
if the water quantity of the system is insufficient, water is supplemented into the system through the water supplementing pipe.
In the daytime energy release process, if the cold quantity provided by the cold storage water tank can not meet all load demands in the daytime, the second electric regulating valve, the seventh electric regulating valve and the eighth electric regulating valve are opened, and at the moment, the cold quantity generated by the radiation refrigeration module flows into the heat exchange coil in the tail end device so as to compensate the problem of insufficient cold quantity released by the cold storage water tank.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
(1) The invention realizes the organic combination of the tail end device, the passive ventilation cooling roof and the radiation cooling, forms a novel passive air conditioning system, and fully utilizes the natural cold source, reduces the energy consumption of the air conditioning system and realizes energy conservation by utilizing the characteristic that the radiation cooling film exchanges heat with the outer space to obtain cold.
(2) The invention can store the cold energy obtained by radiating the refrigeration film and the outer space at night and release the cold energy in daytime, thereby relieving the peak-valley difference of the power load and improving the running economy of the equipment.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a radiant refrigeration module in an embodiment of the invention, (a) is a horizontal cross-sectional view, and (b) is a side cross-sectional view;
the drawings are as follows: the end device 1, the fan 101, the heat exchange coil 102, the end air supply port 103, the end first air return port 104, the end second air return port 105, the air-conditioned room 2, the room first air return port 201, the room second air return port 202, the room third air return port 203, the room fourth air return port 204, the first air duct a, the second air duct b, the third air duct c, the cold storage tank 3, the radiation refrigeration module 4, the radiation refrigeration film 401, the module water inlet pipe 402, the cavity 403, the module water outlet pipe 404, the insulation material 405, the phase change energy storage material 406, the module coil 407, the first electric control valve 501, the second electric control valve 502, the third electric control valve 503, the fourth electric control valve 504, the fifth electric control valve 505, the sixth electric control valve 506, the seventh electric control valve 507, the eighth electric control valve 508, the first water pump 601, the second water pump 602, the first 701 pipe, the second pipe 702, the third pipe 703, the fourth pipe 704, the fifth pipe 705, the sixth pipe 706, the seventh pipe 708, the eighth pipe 709, the ninth pipe 709, the tenth pipe 710, and the eleventh pipe 710.
Detailed Description
The following describes the technical scheme of the embodiment of the present invention in detail with reference to the accompanying drawings.
As shown in fig. 1 and fig. 2, a novel passive air conditioning system and an energy storage and release method thereof according to an embodiment of the present invention include an end device 1, an air conditioning room 2, a cold storage water tank 3, a radiation refrigeration module 4, a first electric control valve 501, a second electric control valve 502, a third electric control valve 503, a fourth electric control valve 504, a fifth electric control valve 505, a sixth electric control valve 506, a seventh electric control valve 507, an eighth electric control valve 508, a first water pump 601, and a second water pump 602; the tail end device 1 is formed by combining a fan 101, a heat exchange coil 102, a tail end air supply port 103, a tail end first air return port 104 and a tail end second air return port 105; the air-conditioning room 2 comprises a first air return port 201, a second air return port 202, a third air return port 203, a fourth air return port 204, a first air duct a, a second air duct b, a third air duct c and a radiation refrigeration film 401, wherein air valves are arranged at all the air inlets, and the air ducts, the radiation refrigeration film 401 and a roof are integrated into a passive cooling ventilation roof; the radiation refrigeration module 4 comprises a radiation refrigeration film 401, a module water inlet pipe 402, a cavity 403, a module water outlet pipe 404, a heat insulation material 405, a phase change energy storage material 406 and a module coil 407.
As shown in fig. 1, in the embodiment of the invention, a novel passive air conditioning system and an energy storage and release method thereof are provided, and the connection mode between each component is as follows:
the module water outlet pipe 404 of the radiation refrigeration module 4 is connected with the water inlet of the first pipeline 701, the water outlet of the first pipeline 701 is connected with the water inlet of the second pipeline 702, the first water outlet of the second pipeline 702 is connected with the water inlet of the third pipeline 703, the water outlet of the third pipeline 703 is connected with the water inlet of the fourth pipeline 704, the water outlet of the fourth pipeline 704 is connected with the water inlet of the heat exchange coil 102 in the tail end device 1, the third electric regulating valve 503 is arranged on the fourth pipeline 704, and the eighth electric regulating valve 508 is arranged on the first pipeline 701;
the water outlet of the heat exchange coil 102 in the end device 1 is connected with the water inlet of a fifth pipeline 705, the first water outlet of the fifth pipeline 705 is connected with the water inlet of a sixth pipeline 706, the water outlet of the sixth pipeline 706 is connected with the water inlet of a seventh pipeline 707, the water outlet of the seventh pipeline 707 is connected with the first water inlet of an eighth pipeline 708, the water outlet of the eighth pipeline 708 is connected with the module water inlet 402 of the radiation refrigeration module 4, the first electric regulating valve 501 is arranged on the fifth pipeline 705, the second electric regulating valve 502 is arranged on the sixth pipeline 706, the seventh electric regulating valve 507 is arranged on the eighth pipeline 708, and the first water pump 601 is arranged on the fifth pipeline 705;
the second water outlet of the second pipeline 702 is connected with the water inlet of a ninth pipeline 709, the water outlet of the ninth pipeline 709 is connected with the first port of the cold accumulation water tank 3, and the fourth electric regulating valve 504 is arranged on the ninth pipeline 709;
the second port of the cold accumulation water tank 3 is connected with the water inlet of the tenth pipeline 710, the water outlet of the tenth pipeline 710 is connected with the second water inlet of the eighth pipeline 708, and the sixth electric regulating valve 506 and the second water pump 602 are both arranged on the tenth pipeline 710;
the second water outlet of the fifth pipeline 705 is connected with the water inlet of the eleventh pipeline 711, the water outlet of the eleventh pipeline 711 is connected with the third port of the cold accumulation water tank 3, and the fifth electric regulating valve 505 is arranged on the eleventh pipeline 711.
The water replenishing pipe 712 is connected with a fourth port of the cold accumulation water tank 3.
The working principle of the invention is as follows:
a novel passive air conditioning system and a method for storing energy and releasing energy thereof, comprising a night energy storage method and a daytime energy release method,
the night energy storage method adopts one of the following methods:
the method comprises the following steps: when the indoor temperature at night is in the range of 27-32 ℃, the temperature in the air-conditioning room 2 is mainly regulated by a passive cooling ventilation roof, at this time, a first electric regulating valve 501, a second electric regulating valve 502, a third electric regulating valve 503, a fifth electric regulating valve 505 and a first water pump 601 are closed, a fourth electric regulating valve 504, a sixth electric regulating valve 506, a seventh electric regulating valve 507, an eighth electric regulating valve 508 and a second water pump 602 are opened, as the required cold energy in the air-conditioning room 2 is less, air valves of a third air return port 203 and a fourth air return port 204 of the room are opened, an air valve of the first air return port 201, the second air return port 202 of the room and an air valve of a terminal first air return port 104 and a terminal second air return port 105 are closed, indoor air enters a first air duct a and a second air duct b from the third air return port 203 and the fourth air return port 204 of the room respectively, the radiation refrigeration film 401 of the roof obtains the cold energy by radiation heat exchange with an outer space, and the cold energy is transferred to the air in the first air duct a and the second air duct b, the air in the air duct a and the second air duct b is enabled to be converged by the air in the air duct b, and the air cooling air in the air duct b is cooled air duct b is enabled to enter the air duct 101 at the terminal air duct 2, and the terminal air duct 101 is cooled down, and the temperature in the air duct is lowered down;
after the radiation refrigeration film 401 on the surface of the radiation refrigeration module 4 performs radiation heat exchange with the outer space to obtain cold energy, the cold energy is stored in the phase-change energy storage material 406, the water flowing through the module coil 407 exchanges heat with the phase-change energy storage material 406 to obtain cold energy, the temperature is reduced, the cold water flows out of the module water outlet pipe 404 and flows into the cold storage water tank 3 through the first pipeline 701, the second pipeline 702 and the ninth pipeline 709, and the water with higher temperature in the water tank flows into the radiation refrigeration module 4 through the tenth pipeline 710 and the eighth pipeline 708 under the action of the second water pump 602;
after the cold accumulation amount of the radiation refrigeration module 4 is completely conveyed to the cold accumulation water tank 3 through the water in the cold accumulation water tank 3, the second water pump 602 stops working, at the moment, the radiation refrigeration module 4 performs cold accumulation again through the phase-change energy storage material 406, and when the temperature in the phase-change energy storage material 406 is lower than the temperature of the water in the cold accumulation water tank 3, the second water pump 602 works again to convey the cold accumulation amount of the radiation refrigeration module 4 to the cold accumulation water tank 3.
The second method is as follows: when the indoor temperature at night is in the range of 33-40 ℃, the cold energy generated by the passive cooling ventilation roof cannot meet the indoor thermal comfort, at this time, part of the cold energy of the air-conditioning room 2 is provided by the passive cooling ventilation roof, the other part of the cold energy is provided by the radiation refrigeration module 4, the first electric regulating valve 501, the second electric regulating valve 502, the third electric regulating valve 503, the fourth electric regulating valve 504, the sixth electric regulating valve 506, the seventh electric regulating valve 507, the eighth electric regulating valve 508, the first water pump 601 and the second water pump 602 are opened, the fifth electric regulating valve 505 is closed, all air valves of all air inlets are opened, the indoor air enters the first air channel a and the second air channel b from the third air return opening 203 of the room and the fourth air return opening 204 of the room respectively, the radiation refrigeration film 401 of the roof exchanges heat with the outer space through radiation, so as to obtain the cold energy, the cold energy is transferred to the air in the first air channel a and the second air channel b, the air temperature in the first air channel a and the second air channel b is reduced, the cooled air enters the second air channel b from the second air channel b to the third air channel c to the tail end device 1, the other part of the cooled cold air enters the room air inlet device 1 from the tail end 1 and the tail end of the second air inlet device 104 to tail end 1 of the room;
the radiation refrigeration film 401 on the surface of the radiation refrigeration module 4 obtains cold energy by radiating and exchanging with the outer space, and stores the cold energy in the phase-change energy storage material 406, water flowing through the module coil 407 exchanges heat with the phase-change energy storage material 406 to obtain cold energy, the temperature is reduced, cold water flows out from the module water outlet pipe 404 and passes through the first pipeline 701 and the second pipeline 702, a part of cold water flows into the heat exchange coil 102 of the terminal device 1 through the third pipeline 703 and the fourth pipeline 704, the temperature is reduced after the air in the terminal device 1 exchanges heat with the heat exchange coil 102, the air is sent into a room under the action of the fan 103, so that the indoor temperature is reduced, and hot water after heat exchange flows out from the output end of the heat exchange coil 102 and flows back into the radiation refrigeration module 4 through the fifth pipeline 705, the sixth pipeline 706, the seventh pipeline 707 and the eighth pipeline 708;
the other part of cold water flows into the cold storage water tank 3 through a ninth pipeline 709, and water with higher temperature in the water tank flows into the radiation refrigeration module 4 through a tenth pipeline 710 and an eighth pipeline 708 under the action of the second water pump 602;
after the cold accumulation amount of the radiation refrigeration module 4 is completely conveyed to the cold accumulation water tank 3 through the water in the cold accumulation water tank 3, the second water pump 602 stops working, at the moment, the radiation refrigeration module 4 performs cold accumulation again through the phase-change energy storage material 406, and when the temperature in the phase-change energy storage material 406 is lower than the temperature of the water in the cold accumulation water tank 3, the second water pump 602 works again to convey the cold accumulation amount of the radiation refrigeration module 4 to the cold accumulation water tank 3.
The daytime energy release method comprises the following steps:
when the indoor temperature is in the range of 28-35 ℃ in daytime, under the action of a passive cooling ventilation roof, the indoor temperature is insufficient to meet the indoor thermal comfort, the first electric regulating valve 501, the third electric regulating valve 503, the fourth electric regulating valve 504, the fifth electric regulating valve 505 and the first water pump 601 are opened, the second electric regulating valve 502, the sixth electric regulating valve 506, the seventh electric regulating valve 507, the eighth electric regulating valve 508 and the second water pump 602 are closed, the air valves of all the air inlets are opened, at this time, indoor air enters the first air channel a and the second air channel b from the third air return opening 203 of the room and the fourth air return opening 204 of the room respectively, the radiation refrigeration film 401 of the roof performs radiation heat exchange with the outer space to obtain cold energy, the cold energy is transferred to the air in the first air channel a and the second air channel b, the air temperature in the first air channel a and the second air channel b is reduced, the cooled cold air enters the end device 1 after being converged in the third air channel c, the other part of the air enters the room 201 and the second air return opening 202 from the room, enters the end of the air return opening 202 from the first air return opening 201 and the second air return opening 202, the end of the air return opening 104 flows into the heat exchange pipeline 1 through the heat exchange pipeline (the water tank 1) and the water tank 1 and the end water tank 102 and the water tank 711) flows into the end water tank 1 through the heat exchange pipeline (the end water tank 1 and the end heat exchange pipeline 1, the water tank is cooled down in the end water tank 1) and the water tank is cooled down through the end water tank 3, and the water tank is cooled down, and the temperature is cooled down, and enters the air temperature is cooled down in the water tank is cooled down;
if the system water quantity is insufficient, the water in the system is replenished through a water replenishing pipe 712.
During the energy release process in the daytime, if the cold energy provided by the cold storage water tank 3 can not meet the total load requirement in the daytime, the second electric regulating valve 502, the seventh electric regulating valve 507 and the eighth electric regulating valve 508 are opened, and at this time, the cold energy generated by the radiation refrigeration module 4 flows into the heat exchange coil 102 in the terminal device 1 to compensate the problem of insufficient cold energy released by the cold storage water tank 3.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (4)
1. The novel passive air conditioning system is characterized by comprising a tail end device (1), an air conditioning room (2), a cold accumulation water tank (3), a radiation refrigeration module (4), a first electric regulating valve (501), a second electric regulating valve (502), a third electric regulating valve (503), a fourth electric regulating valve (504), a fifth electric regulating valve (505), a sixth electric regulating valve (506), a seventh electric regulating valve (507), an eighth electric regulating valve (508), a first water pump (601) and a second water pump (602);
the tail end device (1) is formed by combining a fan (101), a heat exchange coil (102), a tail end air supply port (103), a tail end first air return port (104) and a tail end second air return port (105);
the air-conditioning room (2) comprises a first air return opening (201), a second air return opening (202), a third air return opening (203), a fourth air return opening (204), a first air duct (a), a second air duct (b), a third air duct (c) and a radiation refrigeration film (401), air valves are arranged at all air inlets, and the air ducts, the radiation refrigeration film (401) and a roof are integrated into a passive cooling ventilation roof;
the radiation refrigeration module (4) comprises a radiation refrigeration film (401), a module water inlet pipe (402), a cavity (403), a module water outlet pipe (404), a heat insulation material (405), a phase change energy storage material (406) and a module coil pipe (407);
the novel passive air conditioning system is characterized in that the connection modes among all the components are as follows:
the module water outlet pipe (404) of the radiation refrigeration module (4) is connected with the water inlet of a first pipeline (701), the water outlet of the first pipeline (701) is connected with the water inlet of a second pipeline (702), the first water outlet of the second pipeline (702) is connected with the water inlet of a third pipeline (703), the water outlet of the third pipeline (703) is connected with the water inlet of a fourth pipeline (704), the water outlet of the fourth pipeline (704) is connected with the water inlet of a heat exchange coil (102) in the tail end device (1), the third electric regulating valve (503) is arranged on the fourth pipeline (704), and the eighth electric regulating valve (508) is arranged on the first pipeline (701);
the water outlet of the heat exchange coil (102) in the tail end device (1) is connected with the water inlet of a fifth pipeline (705), the first water outlet of the fifth pipeline (705) is connected with the water inlet of a sixth pipeline (706), the water outlet of the sixth pipeline (706) is connected with the water inlet of a seventh pipeline (707), the water outlet of the seventh pipeline (707) is connected with the first water inlet of an eighth pipeline (708), the water outlet of the eighth pipeline (708) is connected with the module water inlet pipe (402) of the radiation refrigeration module (4), the first electric regulating valve (501) is arranged on the fifth pipeline (705), the second electric regulating valve (502) is arranged on the sixth pipeline (706), the seventh electric regulating valve (507) is arranged on the eighth pipeline (708), and the first water pump (601) is arranged on the fifth pipeline (705);
the second water outlet of the second pipeline (702) is connected with the water inlet of a ninth pipeline (709), the water outlet of the ninth pipeline (709) is connected with the first port of the cold accumulation water tank (3), and the fourth electric regulating valve (504) is arranged on the ninth pipeline (709);
the second port of the cold accumulation water tank (3) is connected with the water inlet of a tenth pipeline (710), the water outlet of the tenth pipeline (710) is connected with the second water inlet of an eighth pipeline (708), and the sixth electric regulating valve (506) and the second water pump (602) are both arranged on the tenth pipeline (710);
the second water outlet of the fifth pipeline (705) is connected with the water inlet of the eleventh pipeline (711), the water outlet of the eleventh pipeline (711) is connected with the third port of the cold accumulation water tank (3), and the fifth electric regulating valve (505) is arranged on the eleventh pipeline (711);
the water supplementing pipe (712) is connected with a fourth port of the cold accumulation water tank (3);
the energy storage and release method of the novel passive air conditioning system is characterized by comprising a night energy storage method and a daytime energy release method,
the night energy storage method adopts one of the following methods:
the method comprises the following steps: when the indoor temperature at night is in the range of 27-32 ℃, the temperature in the air-conditioning room (2) is mainly regulated by a passive cooling ventilation roof, at the moment, a first electric regulating valve (501), a second electric regulating valve (502), a third electric regulating valve (503), a fifth electric regulating valve (505) and a first water pump (601) are closed, a fourth electric regulating valve (504), a sixth electric regulating valve (506), a seventh electric regulating valve (507), an eighth electric regulating valve (508) and a second water pump (602) are opened, as the required cold in the air-conditioning room (2) is less, air valves of a third air return port (203) and a fourth air return port (204) of the room are opened, air valves of the first air return port (201), the second air return port (202) of the room and the first air return port (104) at the tail end and the second air return port (105) are closed, indoor air enters a first air duct (a) and a second air duct (b) respectively from the third air return port (203) of the room and the fourth air return port (204) of the room, radiation of the air in the air chamber and the second air duct (b) is cooled by the radiation film (401) and the radiation film (b) in the air duct (b) at the tail end of the air chamber (1) and the air duct (b) is cooled by the radiation film (b) to obtain the cold air in the air duct (b) and the cooling air duct (c) after cooling air in the air duct (1) and the air duct cooling device, is sent into an air-conditioning room (2) through a tail end air supply opening (103) under the action of a fan (101), so that the indoor temperature is reduced;
after the radiation refrigeration film (401) on the surface of the radiation refrigeration module (4) performs radiation heat exchange with the outer space to obtain cold energy, the cold energy is stored in the phase-change energy storage material (406), the water flowing through the module coil (407) exchanges heat with the phase-change energy storage material (406) to obtain cold energy, the temperature is reduced, the cold water flows out of the module water outlet pipe (404) through the first pipeline (701), the second pipeline (702) and the ninth pipeline (709) and flows into the cold storage water tank (3), and water with higher temperature in the water tank flows into the radiation refrigeration module (4) through the tenth pipeline (710) and the eighth pipeline (708) under the action of the second water pump (602);
after the cold accumulation amount of the radiation refrigeration module (4) is completely conveyed to the cold accumulation water tank (3) through water in the cold accumulation water tank (3), the second water pump (602) stops working, at the moment, the radiation refrigeration module (4) performs cold accumulation again through the phase change energy storage material (406), and when the temperature in the phase change energy storage material (406) is lower than the temperature of the water in the cold accumulation water tank (3), the second water pump (602) works again, and the cold accumulation amount of the radiation refrigeration module (4) is conveyed to the cold accumulation water tank (3);
the second method is as follows: when the indoor temperature at night is in the range of 33-40 ℃, the cold energy generated by the passive cooling ventilation roof cannot meet the indoor thermal comfort, at this time, part of the cold energy of the air-conditioning room (2) is provided by the passive cooling ventilation roof, the other part of the cold energy is provided by the radiation refrigeration module (4), the first electric control valve (501), the second electric control valve (502), the third electric control valve (503), the fourth electric control valve (504), the sixth electric control valve (506), the seventh electric control valve (507), the eighth electric control valve (508), the first water pump (601) and the second water pump (602) are opened, the fifth electric control valve (505) is closed, all air valves of all air inlets are opened, the indoor air enters the first air channel (a) and the second air channel (b) from the third air return opening (203) of the room and the fourth air return opening (204) of the room respectively, the radiation film (401) of the roof obtains the cold energy by radiation heat exchange with the outer space, the cold energy is transferred to the air in the first air channel (a) and the second air channel (b), the air in the first air channel (a) and the second air channel (b) is converged by the air inlet of the second air return opening (201) and the second air return opening (201) at the other end of the second air return opening (201) of the room, and the air inlet of the second air return opening is cooled down in the room (201) is cooled down, entering the end device (1) from the end first air return port (104) and the end second air return port (105);
the radiation refrigeration film (401) on the surface of the radiation refrigeration module (4) obtains cold energy by radiating and exchanging with the outer space, the cold energy is stored in the phase-change energy storage material (406), the water flowing through the module coil (407) exchanges heat with the phase-change energy storage material (406) to obtain the cold energy, the temperature is reduced, after cold water flows out from the module water outlet pipe (404) through the first pipeline (701) and the second pipeline (702), a part of cold water flows into the heat exchange coil (102) of the terminal device (1) through the third pipeline (703) and the fourth pipeline (704), the temperature is reduced after the air in the terminal device (1) exchanges heat with the heat exchange coil (102), the air is sent into a room under the action of a fan, so that the indoor temperature is reduced, and the hot water after heat exchange flows out from the output end of the heat exchange coil (102) through the fifth pipeline (705), the sixth pipeline (706), the seventh pipeline (707) and the eighth pipeline (708) and then flows back into the radiation refrigeration module (4);
the other part of cold water flows into the cold accumulation water tank (3) through a ninth pipeline (709), and water with higher temperature in the water tank flows into the radiation refrigeration module (4) through a tenth pipeline (710) and an eighth pipeline (708) under the action of the second water pump (602);
after the cold accumulation amount of the radiation refrigeration module (4) is completely conveyed to the cold accumulation water tank (3) through water in the cold accumulation water tank (3), the second water pump (602) stops working, at the moment, the radiation refrigeration module (4) performs cold accumulation again through the phase change energy storage material (406), and when the temperature in the phase change energy storage material (406) is lower than the temperature of the water in the cold accumulation water tank (3), the second water pump (602) works again, and the cold accumulation amount of the radiation refrigeration module (4) is conveyed to the cold accumulation water tank (3);
the daytime energy release method comprises the following steps:
when the indoor temperature is 28-35 ℃ in daytime, under the action of a passive cooling ventilation roof, when the indoor thermal comfort is not enough, the first electric regulating valve (501), the third electric regulating valve (503), the fourth electric regulating valve (504), the fifth electric regulating valve (505), the first water pump (601) are opened, the second electric regulating valve (502), the sixth electric regulating valve (506), the seventh electric regulating valve (507), the eighth electric regulating valve (508) and the second water pump (602) are closed, the air valves of all the air inlets are opened, at the moment, the indoor air enters the first air channel (a) and the second air channel (b) from the third air return opening (203) and the fourth air return opening (204) of the room respectively, the radiation refrigeration film (401) of the roof performs radiation heat exchange with the outer space to obtain cold energy, the cold energy is transmitted to the air in the first air channel (a) and the second air channel (b), so that the temperature of the air in the first air channel (a) and the air in the second air channel (b) is reduced, the cooled cold air is converged in the third air channel (c) and then enters the tail end device (1), the other part of the air enters the attic from the first air return opening (201) of the room and the second air return opening (202) of the room, enters the tail end device (1) from the first air return opening (104) at the tail end and the second air return opening (105) at the tail end, and the cold water in the cold storage water tank (3) flows out through the ninth pipeline (709), the third pipeline (703) and the fourth pipeline (704) flow into the heat exchange coil (102) of the end device (1), the temperature of the air in the end device (1) is reduced after heat exchange with the heat exchange coil (102), the air is sent into a room under the action of a fan, so that the indoor temperature is reduced, and the heat-exchanged hot water flows back to the cold storage water tank (3) through the fifth pipeline (705) and the eleventh pipeline (711) under the action of the first water pump (601);
if the water quantity of the system is insufficient, the water in the system is supplemented through a water supplementing pipe (712).
2. The novel passive air conditioning system according to claim 1, wherein the surface of the radiation refrigeration module (4) facing the sky is stuck with a radiation refrigeration film (401), the other surfaces are stuck with heat insulation materials (405), the water outlet of the module water inlet pipe (402) is connected with the water inlet of the module coil pipe (407) in the cavity (403), the outlet of the module coil pipe (407) is connected with the inlet end of the module water outlet pipe (404), the phase change energy storage material (406) is filled in the cavity (403), the cold energy generated by the radiation refrigeration module is provided by n radiation refrigeration modules (4), and n is an integer greater than or equal to 1.
3. A new passive air conditioning system according to claim 1, characterized in that the emissivity of the radiation refrigeration film (401) is greater than 0.90 in the 8-13um band and greater than 0.90 in the 0.25-3um band;
the radiation frigories film (401) may be one of a nano-photo-excited selective film, a metamaterial spectrum selective film, or a radiation frigories coating.
4. The method for storing and releasing energy of a novel passive air conditioning system according to claim 1 is characterized in that, during the energy release process in daytime, if the cooling capacity provided by the cold storage water tank (3) cannot meet the total cooling demand in daytime, the second electric control valve (502), the seventh electric control valve (507) and the eighth electric control valve (508) are opened, and at this time, the cooling capacity generated by the radiation refrigeration module (4) flows into the heat exchange coil (102) in the terminal device (1) to compensate the problem of insufficient cooling capacity released by the cold storage water tank (3).
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| CN111928428B (en) * | 2020-08-07 | 2021-09-14 | 长安大学 | Control method of air conditioning system considering demand response and refrigeration system |
| CN112524721B (en) * | 2020-12-18 | 2022-02-08 | 南京工业大学 | Novel passive energy storage type air conditioning system |
| CN114135954B (en) * | 2021-12-01 | 2023-03-28 | 南京工业大学 | Heat pipe heat exchange air conditioning system |
| CN114623624B (en) * | 2022-02-21 | 2024-04-26 | 东南大学 | Solar photo-thermal and radiation refrigeration integrated device |
| CN115200111B (en) * | 2022-06-07 | 2024-01-16 | 河北工业大学 | Passive ventilation system utilizing solar chimney structure and radiation refrigeration combination |
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