CN114543219A - Double-source air conditioning system - Google Patents

Double-source air conditioning system Download PDF

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Publication number
CN114543219A
CN114543219A CN202210455344.6A CN202210455344A CN114543219A CN 114543219 A CN114543219 A CN 114543219A CN 202210455344 A CN202210455344 A CN 202210455344A CN 114543219 A CN114543219 A CN 114543219A
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China
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phase change
energy storage
conditioning system
air conditioning
plate
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CN114543219B (en
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曹静宇
郑玲
彭晋卿
罗正意
李思慧
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Hunan University
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Hunan University
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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
    • F24F5/001—Compression cycle type
    • 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
    • F24F5/0007—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
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

The application discloses a dual-source air conditioning system, which comprises a compressor, an evaporation heat exchanger, a throttle valve and an RC-AS-PCM integrated module, wherein the RC-AS-PCM integrated module is connected between the throttle valve and the compressor and is used for condensing a refrigerant; the RC-AS-PCM integrated module comprises a refrigerant pipe, a sky radiation refrigeration assembly and a phase change energy storage module for storing cold energy of the sky radiation refrigeration assembly; the RC-AS-PCM integrated module utilizes the sky radiation refrigeration assembly, the phase change energy storage module and the refrigerant of the external source air cooling refrigerant pipe. The double-source air conditioning system stores low-temperature cold energy obtained by sky radiation refrigeration in a phase change energy storage mode by utilizing the shutdown time period and the intermittent standby time period during the operation of the air conditioner, effectively reduces the condensation temperature of a refrigerant while making up the defect that the real-time refrigeration power of the sky radiation refrigeration is low, and greatly improves the refrigeration efficiency of the air conditioning system.

Description

Double-source air conditioning system
Technical Field
The application relates to the technical field of air conditioners, in particular to a double-source air conditioning system.
Background
With the development of modern construction industry, the living standard and quality of life of people are continuously improved, and the air conditioner becomes one of the necessities of production and life of people. Meanwhile, the energy consumption of buildings in China also rises year by year, the share of the total energy consumption in the total energy consumption of China is gradually close to three, and the energy consumption of air conditioners occupies the most main part, so that the improvement of the efficiency of the air conditioners is particularly important for the energy conservation of buildings and the environmental protection of China.
In the fields of heat dissipation of industrial buildings, food refrigeration and preservation, building refrigeration in tropical regions and the like, the function selection of the air conditioner is single, and the single refrigeration mode can meet the use requirement. The working principle of the traditional air source air conditioner is that a compressor compresses a gaseous refrigerant into a high-temperature high-pressure state, the gaseous refrigerant is sent to a condenser, the refrigerant is condensed into a high-temperature high-pressure liquid refrigerant in the condenser, and then the high-temperature high-pressure liquid refrigerant flows into a liquid storage tank; the liquid refrigerant is throttled by an expansion valve from a liquid storage tank, so that the temperature and the pressure are reduced; the low-temperature low-pressure liquid refrigerant absorbs the heat of the surrounding air in the evaporator to be vaporized, thereby achieving the aim of refrigeration. The traditional air conditioner is influenced by higher air source temperature, the condensation temperature is higher, and the improvement of the refrigeration efficiency is limited, so that the novel refrigeration technology seeking energy conservation and emission reduction is the current hotspot direction.
Disclosure of Invention
The purpose of this application is to provide a dual-source air conditioning system, and this dual-source air conditioning system can show the condensation temperature who reduces compression refrigeration formula air conditioning system's refrigerant, promotes air conditioning system's refrigeration efficiency by a wide margin.
In order to achieve the above object, the present application provides a dual-source air conditioning system, which includes a compressor, an evaporation heat exchanger, a throttle valve, and an RC-AS-PCM integrated module connected between the throttle valve and the compressor and used for condensing a gaseous refrigerant;
the RC-AS-PCM integrated module comprises a refrigerant pipe, a sky radiation refrigeration assembly and a phase change energy storage module for storing cold energy of the sky radiation refrigeration assembly; the refrigerant pipe is connected between the throttling valve and the compressor, and the RC-AS-PCM integrated module cools the refrigerant in the refrigerant pipe by utilizing the sky radiation refrigeration assembly, the phase change energy storage module and external air.
Optionally, the RC-AS-PCM integrated module further includes a frame, an insulating layer, and heat dissipation fins, the sky radiation refrigeration assembly includes a radiation cold plate and a porous polyethylene cover plate, and the porous polyethylene cover plate can reflect solar energy;
the frame and the heat insulation layer comprise a bottom plate and a side plate, the porous polyethylene cover plate is arranged at the top of the side plate, the radiation cold plate is fixedly connected with the side plate and is arranged at a preset interval with the bottom plate, an air flow channel I is formed between the porous polyethylene cover plate and the radiation cold plate, and the phase change energy storage module is attached to the bottom of the radiation cold plate and forms an air flow channel II with the bottom plate;
the refrigerant pipe is attached to the radiation cold plate, penetrates through the radiating fins and penetrates through the phase change energy storage module, and the radiating fins extend to the first air flow channel and the second air flow channel from two ends.
Optionally, the phase change energy storage module is a solid-solid phase change material layer.
Optionally, the radiant cooling panel comprises a substrate disposed on a bottom layer, a solar radiation reflective coating disposed on a middle layer, and an infrared radiation emitting coating disposed on a top layer.
Optionally, the frame and the heat-insulating layer are provided with an opening-closing grid plate for controlling the opening and closing of the first air flow channel and the second air flow channel, and further comprise a temperature detection module for detecting the temperature of the phase change energy storage module and a control module for connecting the temperature detection module and the opening-closing grid plate;
when the temperature of the phase change energy storage module exceeds a preset temperature, the control module controls the opening and closing grid plate to be opened, so that the first air flow channel and the second air flow channel are communicated with external air.
Optionally, the RC-AS-PCM integrated modules are arranged in multiple groups, and/or the evaporation heat exchangers are arranged in parallel in multiple groups.
Optionally, a liquid storage tank is further disposed between the refrigerant outlet of all the RC-AS-PCM integrated modules and the refrigerant inlet of the throttle valve.
The beneficial technical effects of the application are embodied in the following aspects:
(1) the application innovatively utilizes the sky radiation refrigeration technology, combines the sky radiation refrigeration technology with the traditional air source air conditioner, fully exerts the advantages of passive refrigeration of sky radiation refrigeration, utilizes the sky radiation refrigeration assembly to refrigerate in the shutdown and standby periods, stores prepared cold energy through the phase change energy storage module, and condenses the refrigerant of the refrigerant pipe by combining the cold energy prepared by the sky radiation refrigeration assembly in real time and stored in the phase change energy storage module with the air source, so that the condensation temperature of a compression type refrigeration cycle can be effectively reduced, and the refrigeration efficiency of the air conditioner is greatly improved; the cooperation of the sky radiation cold energy and two clean energy sources of the air source improves the security and the stability of the system, is more environment-friendly, and is beneficial to building energy conservation and environmental protection of China.
(2) The application combines sky radiation refrigeration and phase change cold-storage technology, and longer shut down period or intermittent type nature's standby period when utilizing the air conditioner operation are stored the low temperature cold energy of sky radiation refrigeration subassembly preparation with the mode of phase change energy storage, and phase change energy storage module has compensatied the lower not enough of the real-time refrigeration power of sky radiation refrigeration for sky radiation refrigeration energy supply and idle call can provide effectual buffering on time scale.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a dual source air conditioning system according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an RC-AS-PCM integrated module according to an embodiment of the present application;
FIG. 3 is a cross-sectional view of the RC-AS-PCM integrated module of FIG. 2;
FIG. 4 is an enlarged view of portion A of FIG. 3;
fig. 5 is a schematic diagram of a dual-source air conditioning system according to another embodiment of the present application.
Wherein:
the solar energy and heat collecting device comprises a 1-RC-AS-PCM integrated module, a 2-compressor, a 3-evaporation heat exchanger, a 4-throttle valve, a 5-liquid storage tank, 6-radiating fins, 7-refrigerant pipes, 8-frame and heat insulation layers, 9-porous polyethylene cover plates, a 10-air flow channel I, a 11-phase change energy storage module, a 12-air flow channel II, a 13-base plate, a 14-solar energy radiation reflection coating, a 15-infrared radiation emission coating and a 16-fan.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
For the convenience of understanding the present application, the technology applied to the present application will be briefly described herein. The sky radiation refrigeration is a refrigeration mode which can passively, efficiently and sustainably obtain low-temperature refrigeration capacity under the condition of not consuming any external energy, and the working principle is as follows: the object on the earth surface emits self heat to the low-temperature outer space in a thermal radiation mode through the high permeability of the atmosphere in an atmospheric window wave band (8-13 microns), and directly performs radiation heat exchange with the space, so that the self temperature is reduced, and sustainable passive refrigeration is realized. The sky radiation refrigerating device has the advantages of simple structure, strong plasticity, greenness, cleanness, no energy consumption and zero damage to the earth environment. The application creatively applies the sky radiation refrigeration technology to the air conditioning system, provides a low-temperature cold source lower than the air source temperature for the air conditioning refrigeration cycle, and solves the problem of insufficient real-time power of the sky radiation refrigeration technology.
The phase change energy storage technology is to store heat by utilizing latent heat released and absorbed in the processes of solid liquefaction and liquid solidification so as to achieve the purpose of regulating and controlling the ambient temperature of the phase change material to a certain extent and change the space-time distribution of energy use so as to solve the contradiction between energy supply and demand mismatch. Particularly, solid-solid phase change energy storage generally refers to that reversible phase change occurs between a solid crystal or a semi-crystal and another solid crystal, semi-crystal or amorphous to absorb and release heat, and a solid-solid phase change energy storage material is concerned about because of the advantages of stable performance, small volume change, no need of a packaging structure, capability of being processed into any shape, no leakage and the like, and is a phase change energy storage technology with great application prospect.
In order to enable those skilled in the art to better understand the scheme of the present application, the present application will be described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1 to 5, fig. 1 is a schematic diagram of a dual-source air conditioning system according to an embodiment of the present application, fig. 2 is a schematic diagram of an RC-AS-PCM integrated module according to an embodiment of the present application, fig. 3 is a cross-sectional view of the RC-AS-PCM integrated module in fig. 2, fig. 4 is an enlarged view of a portion a of fig. 3, and fig. 5 is a schematic diagram of a dual-source air conditioning system according to another embodiment of the present application. The RC-AS-PCM integrated module in the application means a sky radiation refrigeration-air source heat exchange-phase change energy storage integrated module, means a composite module formed by combining a sky radiation refrigeration technology, an air source heat exchange technology and a phase change energy storage technology, and is also the core of the application; the RC-AS-PCM integrated module is characterized in that the sky radiation refrigeration assembly and the phase change energy storage module are connected in an integrated mode, low-temperature cold energy obtained by sky radiation refrigeration is stored in a phase change energy storage mode by means of a shutdown time period and an intermittent standby time period when the air conditioner operates, the phase change energy storage module provides buffer for sky radiation refrigeration energy supply and air conditioning energy on a time scale, the cold energy stored by the phase change energy storage module and an external source air condensation refrigerant are used for reducing the condensation temperature of the refrigerant, and the refrigeration efficiency of the air conditioning system is greatly improved.
Example 1
AS shown in fig. 1, the embodiment of the present application provides a dual-source air conditioning system, which includes an RC-AS-PCM integrated module 1, a compressor 2, an evaporation heat exchanger 3, and a throttle valve 4. The RC-AS-PCM integrated module 1, the compressor 2, the evaporation heat exchanger 3 and the throttle valve 4 are sequentially connected in series, and a liquid storage tank 5 can be arranged between a refrigerant outlet of the RC-AS-PCM integrated module 1 and a refrigerant inlet of the throttle valve 4 according to requirements. The RC-AS-PCM integrated module 1 serves AS a core component of the air-cooled compressor, and not only can high-temperature and high-pressure gaseous refrigerants compressed by the compressor 2 be condensed by utilizing external air, but also cold energy obtained by the sky radiation refrigeration assembly and stored in the phase change energy storage module 11 can be condensed for the high-temperature and high-pressure gaseous refrigerants, so that the refrigeration efficiency is remarkably improved compared with that of a traditional pure air-cooled unit.
Referring to fig. 2 and 3, the RC-AS-PCM integrated module 1 and the sky radiation refrigeration assembly thereof are configured, where the RC-AS-PCM integrated module 1 includes a refrigerant pipe 7, a frame and heat insulation layer 8, a heat dissipation fin 6, a phase change energy storage module 11, and a sky radiation refrigeration assembly. The refrigerant pipe 7 is connected with the compressor 2 and the throttle valve 4, when the liquid storage tank 5 is arranged, the refrigerant pipe 7 is connected with the compressor 2 and the liquid storage tank 5, the throttle valve 4 is arranged between the liquid storage tank 5 and the evaporative heat exchanger 3, and the refrigerant pipe 7 is specifically a copper pipe. The frame and the heat-insulating layer 8 comprise a bottom plate and side plates on two sides of the bottom plate, and the bottom plate is provided with the heat-insulating layer. The sky radiation refrigeration assembly specifically comprises a porous polyethylene cover plate 9 and a radiation cold plate, wherein the porous polyethylene cover plate 9 is fixed to the top ends of the frame and the heat preservation layer 8, namely the top ends of the side plates, the radiation cold plate is fixed between the side plates and arranged in a gap with the bottom plate, the porous polyethylene cover plate 9 can assist in achieving the all-day radiation refrigeration function, the reflectivity of the porous polyethylene cover plate at a solar radiation waveband is high, the transmittance at an atmospheric window waveband is high, and the radiation cold plate is used for achieving sky radiation refrigeration and transmitting cold energy to the phase change energy storage module 11 for storage.
An air flow channel I10 is formed between the porous polyethylene cover plate and the radiation cold plate, the phase change energy storage module 11 is attached to the bottom of the radiation cold plate, an air flow channel II 12 is formed between the phase change energy storage module 11 and the bottom plate, and the refrigerant pipe 7 is attached to the radiation cold plate and arranged below the radiation cold plate, penetrates through the phase change energy storage module 11 and penetrates through the radiating fins 6. The radiating fins 6 are arranged vertically, multiple groups of radiating fins 6 are arranged in parallel at intervals and are fixed in the frame and the heat insulation layer 8, and the radiating fins extend to the first air flow channel 10 and the second air flow channel 12 from two ends, so that the refrigerant pipe 7 can exchange heat with the phase change energy storage module 11, absorb low-temperature cold energy stored in sky radiation refrigeration, reduce condensation temperature, and exchange heat with an air source through the radiating fins 6, the first air flow channel 10 and the second air flow channel 12.
The radiation cold plate is arranged as shown in fig. 3 and 4, the radiation cold plate is provided with three layers, the bottom layer adopts an aluminum alloy substrate 13, the middle layer adopts a solar radiation reflecting coating 14 formed by a high-emissivity material, such as an aluminum coating or a silver coating, the top layer adopts an infrared radiation emitting coating 15 with high radiation reflectivity, the infrared radiation emitting coating 15 can adopt a polymethyl siloxane coating, namely a PDMS coating, and radiation refrigeration is realized by utilizing the infrared radiation emitting coating 15. The phase change energy storage module 11 may be a solid-solid phase change material layer, such as a polyethylene-shaped solid-solid phase change material layer, and has more stable performance, small volume change and convenient processing.
The dual-source air conditioning system further comprises an opening and closing grid plate arranged at the first air flow channel 10 and the second air flow channel 12, a temperature detection module for detecting the temperature of the phase change energy storage module 11 and a control module. The fan 16, the temperature detection module and the driving mechanism of the opening and closing grid plate are all connected with the control module, so that when the temperature of the phase change energy storage module 11 is low, the opening and closing grid plate is used for sealing the first air flow channel 10 and the second air flow channel 12, and the cold loss of the phase change energy storage module 11 is reduced; and when the cold energy of the phase change energy storage module 11 is primarily consumed and the temperature exceeds the set temperature, the control module controls the opening and closing grid plate to open and conduct the second air flow channel 12, and controls the fan 16 to start to perform external air heat exchange cooling on the refrigerant pipe 7. When the cold energy of the sky radiation refrigeration is further exhausted, and the temperatures of the phase change energy storage module 11 and the radiation cold plate are higher than the ambient temperature, the control module controls the opening and closing grid plate to open and conduct the first air flow channel 10 and the second air flow channel 12, and controls the fan 16 to be started at the same time, so that the phase change energy storage module 11 and the radiation cold plate exchange heat with the air through the fins, and the temperatures of the phase change energy storage module 11 and the radiation cold plate are reduced.
Taking the application of the dual-source air conditioning system to the public buildings in tropical regions as an example, the operation mode is as follows:
from a day period, the dual-source air conditioning system has longer downtime, the system stores certain cold energy by using sky radiation through the RC-AS-PCM integrated module 1 in an idle period at night (such AS from 11 pm to about 7 pm in the next morning), the air flow channel I10 and the air flow channel II 12 are closed in an initial working period (such AS from 7 pm to about 12 pm in the morning), the RC-AS-PCM integrated module 1 serves AS a condenser, and the cold energy collected by cold storage and real-time sky radiation of the phase change energy storage module 11 serves AS an air conditioning cold source to condense a refrigerant in the refrigerant pipe 7, so that efficient refrigeration is realized. After a period of operation, when the cold storage of the phase change energy storage module 11 is insufficient, the air flow channel II 12 is opened, the fan 16 passes through the air flow channel II 12, the radiating fins 6 and the refrigerant pipe 7 to complete air source heat exchange, when the cold energy of the sky radiation refrigeration is further exhausted, the temperatures of the phase change energy storage module 11 and the radiation cold plate are higher than the ambient temperature/preset temperature, the control module controls the opening and closing grid plate to be opened, so that the air flow channel I10, the air flow channel II 12 and the external source air are conducted, the fan 16 is controlled to be started simultaneously, the phase change energy storage module 11 and the radiation cold plate exchange heat with the air through the fins, and the temperatures of the phase change energy storage module and the radiation cold plate are reduced. Therefore, the combined utilization of the sky radiation cold energy and the air source can be realized, and the refrigeration efficiency higher than that of the traditional air conditioner can be maintained.
Meanwhile, for a single start-stop period of the operation time interval of the dual-source air conditioning system, the intermittent characteristic of the operation of the air conditioner is utilized, for example, a standby time interval of 30 minutes stores certain cold energy by utilizing sky radiation through the RC-AS-PCM integrated module 1, the air flow channel I10 and the air flow channel II 12 are closed in the next operation time interval of 20 minutes, the RC-AS-PCM integrated module 1 is used AS a condenser, and the cold energy collected by cold storage of the phase change energy storage module 11 and real-time sky radiation is used AS an air conditioner cold source for efficient refrigeration.
Taking the application of the dual-source air conditioning system to the civil buildings in the tropical regions as an example, the operation mode is as follows:
from a day period, the dual-source air conditioning system has longer downtime, the system stores certain cold energy by using sky radiation through the RC-AS-PCM integrated module 1 in an idle period (such AS from 8 am to 6 pm), the air flow channel I10 and the air flow channel II 12 are closed in an initial working period (such AS from 6 pm to 11 pm), the RC-AS-PCM integrated module 1 serves AS a condenser, and the cold energy collected by cold storage of the phase change energy storage module 11 and real-time sky radiation serves AS an air conditioning cold source to perform efficient refrigeration. After a period of operation, when the phase change energy storage module 11 is insufficient in cold storage, the controller controls the opening and closing grid plate of the air flow channel II 12 to be opened, the air flow channel 12 is communicated with the outside, and the fan 16 completes air source heat exchange through the air flow channel II 12, the radiating fins 6 and the refrigerant pipe 7. When the cold energy of the sky radiation refrigeration is further exhausted, and the temperatures of the phase change energy storage module 11 and the radiation cold plate are higher than the ambient temperature, the control module controls the opening and closing grid plate to open and conduct the first air flow channel 10 and the second air flow channel 12, and controls the fan 16 to be started at the same time, so that the phase change energy storage module 11 and the radiation cold plate exchange heat with the air through the fins, and the temperatures of the phase change energy storage module 11 and the radiation cold plate are reduced. Therefore, the combined utilization of the sky radiation cold energy and the air source can be realized, and the refrigeration efficiency higher than that of the traditional air conditioner can be maintained.
Meanwhile, for a single start-stop period of the operation time interval of the dual-source air conditioning system, the intermittent characteristic of the operation of the air conditioner is utilized, for example, a standby time interval of 30 minutes stores certain cold energy by utilizing sky radiation through the RC-AS-PCM integrated module 1, the air flow channel I10 and the air flow channel II 12 are closed in the next operation time interval of 20 minutes, the RC-AS-PCM integrated module 1 is used AS a condenser, and the cold energy collected by cold storage of the phase change energy storage module 11 and real-time sky radiation is used AS an air conditioner cold source for efficient refrigeration.
Example 2
AS shown in fig. 5, in this embodiment, for the RC-AS-PCM integrated modules 1 and the evaporation heat exchanger 3, multiple sets of RC-AS-PCM integrated modules 1 may be arranged in series/in parallel between the outlet of the compressor 2 and the inlet of the throttle valve 4/the liquid storage tank 5, so AS to increase the indoor refrigeration output. Or a plurality of groups of evaporating heat exchangers 3 can be connected in parallel between the outlet of the throttle valve 4/the liquid storage tank 5 and the inlet of the compressor 2, so as to realize the cooling of a plurality of rooms according to the requirement. That is, the dual-source air conditioning system using the RC-AS-PCM integrated module 1 AS a condenser can also realize the operation modes of "one with more", "one with one", and "one with more". The other parts of the dual source air conditioning system and the arrangement of the RC-AS-PCM integrated module 1 can refer to embodiments 1 and 2.
In the above embodiment, the sky radiation refrigeration component for realizing the sky radiation refrigeration function may not only adopt the porous polyethylene cover plate 9, but also may be replaced with other cover plate materials that can realize the sky radiation refrigeration without affecting the normal function of the system, such as a zinc sulfide cover plate, a zinc oxide cover plate, a polyethylene film cover plate colored by titanium dioxide and the like. The phase change energy storage module 11 may not only be a polyethylene shaped solid-solid phase change material layer, but may also be replaced by other solid-solid phase change material layers, such as layered perovskites, polyols, etc.
The application creatively utilizes the sky radiation refrigeration technology, combines the sky radiation refrigeration technology with the traditional air source air conditioner, fully exerts the advantages of passive refrigeration of sky radiation refrigeration, can effectively reduce the condensation temperature of a compression refrigeration cycle, and greatly improves the refrigeration efficiency of the air conditioner; the sky radiation cold energy and the air source are matched, the low-temperature cold energy obtained by sky radiation refrigeration is stored in a phase change energy storage mode by utilizing a long halt time period or an intermittent standby time period when the air conditioner operates, the phase change energy storage provides effective buffering for sky radiation refrigeration energy supply and air conditioner energy on a time scale, the defect of low real-time refrigeration power of sky radiation refrigeration is overcome, and the guarantee and the stability of the system are improved; but also is more environment-friendly, and is beneficial to building energy conservation and environmental protection in China.
It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.
The dual source air conditioning system provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.

Claims (7)

1. A dual-source air conditioning system comprises a compressor, an evaporation heat exchanger and a throttle valve, and is characterized by also comprising an RC-AS-PCM integrated module which is connected between the throttle valve and the compressor and is used for condensing gaseous refrigerants;
the RC-AS-PCM integrated module comprises a refrigerant pipe, a sky radiation refrigeration assembly and a phase change energy storage module for storing cold energy of the sky radiation refrigeration assembly; the refrigerant pipe is connected between the throttling valve and the compressor, and the RC-AS-PCM integrated module cools the refrigerant in the refrigerant pipe by utilizing the sky radiation refrigeration assembly, the phase change energy storage module and external air.
2. The dual source air conditioning system of claim 1, wherein said RC-AS-PCM integrated module further comprises a frame and insulation layer, heat sink fins, said sky radiation refrigeration assembly comprising a radiation cold plate and a porous polyethylene cover plate;
the frame and the heat insulation layer comprise a bottom plate and a side plate, the porous polyethylene cover plate is arranged at the top of the side plate, the radiation cold plate is fixedly connected with the side plate and is arranged at a preset interval with the bottom plate, an air flow channel I is formed between the radiation cold plate and the porous polyethylene cover plate, and the phase change energy storage module is attached to the bottom of the radiation cold plate and forms an air flow channel II with the bottom plate;
the refrigerant pipe penetrates through the heat dissipation fins and penetrates through the phase change energy storage module, and the heat dissipation fins extend to the first air flow channel and the second air flow channel from two ends.
3. The dual source air conditioning system of claim 2, wherein the phase change energy storage module is a solid-solid phase change material layer.
4. A dual source air conditioning system as claimed in claim 2 or 3, wherein the radiant cold plate comprises a base plate provided in the bottom layer, a solar radiation reflective coating provided in the middle layer and an infrared radiation emitting coating provided in the top layer.
5. The dual-source air conditioning system as claimed in claim 4, wherein the frame and the insulating layer are provided with an opening and closing grid plate for controlling the first air flow passage and the second air flow passage to open and close, and further comprising a temperature detection module for detecting the temperature of the phase change energy storage module, and a control module for connecting the temperature detection module and the opening and closing grid plate;
when the temperature of the phase change energy storage module exceeds a preset temperature, the control module controls the opening and closing grid plate to be opened, so that the first air flow channel and the second air flow channel are communicated with external air.
6. The dual source air conditioning system of any of claims 1-3, wherein the RC-AS-PCM integrated modules are arranged in multiple banks, and/or the evaporative heat exchangers are arranged in multiple banks in parallel.
7. The dual-source air conditioning system AS claimed in claim 6, wherein a liquid storage tank is further provided between the refrigerant outlet of all the RC-AS-PCM integrated modules and the refrigerant inlet of the throttle valve.
CN202210455344.6A 2022-04-28 2022-04-28 Double-source air conditioning system Active CN114543219B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000304473A (en) * 1999-04-21 2000-11-02 Takeo Saito Composite parabolic surface condensing(cpc) type radiation cooler
CN111207530A (en) * 2020-01-10 2020-05-29 中国科学技术大学 Composite refrigerating device with semiconductor refrigerator and sky radiation refrigerating body coupled
CN112413926A (en) * 2020-11-06 2021-02-26 南昌大学 Grating selective passive radiation refrigerating device
CN112902323A (en) * 2021-02-05 2021-06-04 东南大学深圳研究院 Air treatment system with heat pump and radiation combined refrigeration
CN214791609U (en) * 2021-04-26 2021-11-19 山东建筑大学 Sky radiation refrigerating system combined with phase-change energy-storage radiation tail end

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000304473A (en) * 1999-04-21 2000-11-02 Takeo Saito Composite parabolic surface condensing(cpc) type radiation cooler
CN111207530A (en) * 2020-01-10 2020-05-29 中国科学技术大学 Composite refrigerating device with semiconductor refrigerator and sky radiation refrigerating body coupled
CN112413926A (en) * 2020-11-06 2021-02-26 南昌大学 Grating selective passive radiation refrigerating device
CN112902323A (en) * 2021-02-05 2021-06-04 东南大学深圳研究院 Air treatment system with heat pump and radiation combined refrigeration
CN214791609U (en) * 2021-04-26 2021-11-19 山东建筑大学 Sky radiation refrigerating system combined with phase-change energy-storage radiation tail end

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