CN115160989B - Environment-friendly mixed refrigerant, preparation method and application thereof, and refrigeration system - Google Patents

Environment-friendly mixed refrigerant, preparation method and application thereof, and refrigeration system Download PDF

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CN115160989B
CN115160989B CN202210918318.2A CN202210918318A CN115160989B CN 115160989 B CN115160989 B CN 115160989B CN 202210918318 A CN202210918318 A CN 202210918318A CN 115160989 B CN115160989 B CN 115160989B
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mixed refrigerant
friendly mixed
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monofluoromethane
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CN115160989A (en
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皇甫启捷
徐璐
黄泽清
吕如兵
梁祥飞
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
    • C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
    • C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
    • C09K5/045—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds containing only fluorine as halogen
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
    • C09K5/02—Materials undergoing a change of physical state when used
    • C09K5/04—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa
    • C09K5/041—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems
    • C09K5/044—Materials undergoing a change of physical state when used the change of state being from liquid to vapour or vice versa for compression-type refrigeration systems comprising halogenated compounds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/10—Components
    • C09K2205/11—Ethers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/10—Components
    • C09K2205/12—Hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K2205/00—Aspects relating to compounds used in compression type refrigeration systems
    • C09K2205/10—Components
    • C09K2205/12—Hydrocarbons
    • C09K2205/122—Halogenated hydrocarbons
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/10—Process efficiency

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Abstract

The application relates to the technical field of refrigerants, in particular to an environment-friendly mixed refrigerant, a preparation method of the environment-friendly mixed refrigerant, application of the environment-friendly mixed refrigerant and a refrigerating system. The environment-friendly mixed refrigerant comprises a first component, a second component and a third component, wherein the first component is monofluoromethane, the second component is propane, the third component is one selected from 1, 2-tetrafluoroethane, dimethyl ether, 1-difluoroethane, trifluoroiodomethane, isobutane and n-butane, and the GWP value of the environment-friendly mixed refrigerant is not more than 150. The environment-friendly mixed refrigerant provided by the embodiment of the application has good environmental protection, has GWP less than or equal to 150, can reduce heat exchange temperature difference, reduces irreversible loss in the heat exchange process, enables the system circulation to be close to Lorenz circulation, and improves the energy efficiency of the system.

Description

Environment-friendly mixed refrigerant, preparation method and application thereof, and refrigeration system
Technical Field
The application relates to the technical field of refrigerants, in particular to an environment-friendly mixed refrigerant, a preparation method of the environment-friendly mixed refrigerant, application of the environment-friendly mixed refrigerant and a refrigerating system.
Background
In recent years, in order to cope with the global warming and the frequent occurrence of extreme weather, a series of policies have been internationally established to accelerate the elimination of HCFCs refrigerants and to gradually reduce the usage of HFCs to limit the use of high GWP refrigerants. The next generation refrigerant should have zero ODP, low GWP, according to the relevant protocols. The heat potential values (GWP is more than or equal to 1300) of the refrigerants such as HFCs refrigerant R134A, 410A, R a, R404A and R407C which are widely applied to the refrigeration and air-conditioning industry at present are very high, so that a substitute working medium with excellent environmental protection performance is urgently needed to be searched. For example, 1, 2-tetrafluoroethane (R134 a) is widely used in the fields of automobile air-conditioning and other refrigeration systems due to the characteristics of non-toxicity, non-combustibility, non-corrosion, good material compatibility and the like, but with the further enhancement of the refrigerant management with high Global Warming Potential (GWP) at home and abroad, HFCs refrigerants such as R134a face reduction and elimination.
At present, no better alternative scheme is found in pure working media, and the characteristics of each refrigerant can be balanced by mixed refrigerants, so that the research on the mixed refrigerants becomes a hotspot for the research of the refrigerants. Therefore, it is necessary to find a refrigerant with good environmental protection performance, and at the same time, the thermal performance is equivalent to or even better than that of the existing refrigerant, so as to meet the requirements of the refrigerant on environmental protection performance and high efficiency to the greatest extent.
Disclosure of Invention
In order to solve the technical problem of poor environmental protection performance of related refrigerants in the prior art, the primary purpose of the application is to provide an environment-friendly mixed refrigerant, to form a substitute refrigerant with lower GWP and equivalent or better thermodynamic performance compared with the existing refrigerant, and to provide a preparation method of the refrigerant and a refrigeration system using the refrigerant.
In order to achieve the above object, according to a first aspect of the present application, there is provided an environment-friendly mixed refrigerant.
According to the embodiment of the application, the environment-friendly mixed refrigerant comprises a first component, a second component and a third component, wherein the first component is monofluoromethane, the second component is propane, the third component is one selected from 1, 2-tetrafluoroethane, dimethyl ethyl ether, 1-difluoroethane, trifluoroiodomethane, isobutane and n-butane, and the GWP value of the environment-friendly mixed refrigerant is not more than 150.
Further, the third component is 1, 2-tetrafluoroethane, and the environment-friendly mixed refrigerant comprises 15-30% of monofluoromethane, 65-80% of propane and 5% of 1, 2-tetrafluoroethane in percentage by mass.
Further, the third component is dimethyl ether, and the environment-friendly mixed refrigerant comprises 15-80% of monofluoromethane, 5-70% of propane and 10-50% of dimethyl ether by mass percent.
Further, the third component is 1, 1-difluoroethane, and the environment-friendly mixed refrigerant comprises 5-80% of monofluoromethane, 5-75% of propane and 5-80% of 1, 1-difluoroethane in percentage by mass.
Further, the third component is trifluoroiodomethane, and the environment-friendly mixed refrigerant comprises 40-50% of monofluoromethane, 5-20% of propane and 35-55% of trifluoroiodomethane by mass percent.
Further, the third component is isobutane, and the environment-friendly mixed refrigerant comprises 5-80% of monofluoromethane, 5-80% of propane and 10-40% of isobutane in percentage by mass.
Further, the third component is n-butane, and the environment-friendly mixed refrigerant comprises 5-85% of monofluoromethane, 5-85% of propane and 5-25% of n-butane in percentage by mass.
In order to achieve the above object, according to a second aspect of the present application, there is further provided a method for preparing an environment-friendly mixed refrigerant, for preparing the environment-friendly mixed refrigerant provided in the first aspect of the embodiment of the present application, the method comprising the steps of: and mixing and stirring all components of the environment-friendly mixed refrigerant in a normal temperature and normal pressure liquid phase state to obtain the environment-friendly mixed refrigerant.
In order to achieve the above object, according to a third aspect of the present application, the present application also discloses a use of the environment-friendly mixed refrigerant for a refrigeration system.
In order to achieve the above object, according to a fourth aspect of the present application, there is further provided a refrigeration system, which includes a working medium, where the working medium includes the environment-friendly mixed refrigerant provided in the first aspect of the present application.
The environment-friendly mixed refrigerant provided by the embodiment of the application has good environmental protection, has GWP less than or equal to 150, can reduce heat exchange temperature difference, reduces irreversible loss in the heat exchange process, enables the system circulation to be close to Lorenz circulation, and improves the energy efficiency of the system.
Detailed Description
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application in conjunction with the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "comprising" and "having," and any variations thereof, in the description and claims of the present application are intended to cover a non-exclusive inclusion, such that a system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed but may include other elements not expressly listed or inherent to such article or apparatus. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The environment-friendly mixed refrigerant provided by the embodiment of the application is prepared by physically mixing all components of the environment-friendly mixed refrigerant according to the corresponding mass ratio under the state of normal temperature and normal pressure liquid phase to form a multi-component mixture, and particularly can be mixed and stirred under the state of room temperature and liquid phase. The basic parameters of each component in the environment-friendly mixed refrigerant in the embodiment of the application are shown in table 1.
TABLE 1 basic parameters of the constituent substances in Environment-friendly Mixed refrigerant
The environment-friendly mixed refrigerant comprises a first component, a second component and a third component, wherein the first component is monofluoromethane, the second component is propane, the third component is one selected from 1, 2-tetrafluoroethane, dimethyl ether, 1-difluoroethane, trifluoroiodomethane, isobutane and n-butane, and the GWP value of the environment-friendly mixed refrigerant is not more than 150.
Optionally, the third component is 1, 2-tetrafluoroethane, and the environment-friendly mixed refrigerant comprises 15-30% of monofluoromethane, 65-80% of propane and 5% of 1, 2-tetrafluoroethane in percentage by mass. Optionally, the third component is dimethyl ether, and the environment-friendly mixed refrigerant comprises 15-80% of monofluoromethane, 5-70% of propane and 10-50% of dimethyl ether by mass percent. Optionally, the third component is 1, 1-difluoroethane, and the environment-friendly mixed refrigerant comprises 5-80% of monofluoromethane, 5-75% of propane and 5-80% of 1, 1-difluoroethane in percentage by mass. Optionally, the third component is trifluoroiodomethane, and the environment-friendly mixed refrigerant comprises 40-50% of monofluoromethane, 5-20% of propane and 35-55% of trifluoroiodomethane in percentage by mass. Optionally, the third component is isobutane, and the environment-friendly mixed refrigerant comprises 5-80% of monofluoromethane, 5-80% of propane and 10-40% of isobutane in percentage by mass. Optionally, the third component is n-butane, and the environment-friendly mixed refrigerant comprises 5-85% of monofluoromethane, 5-85% of propane and 5-25% of n-butane in percentage by mass.
The environment-friendly mixed refrigerant with the proportion can balance the property characteristics of each component and the characteristic that the temperature slip of the non-azeotropic refrigerant can enable the system circulation to be close to Lorenz circulation, so that the refrigerant has good environment protection, has GWP of less than or equal to 150, can reduce heat exchange temperature difference, reduces irreversible loss in a heat exchange process, enables the system circulation to be close to Lorenz circulation, and improves the energy efficiency of the system.
In order that the manner in which the application may be better understood, a more complete description of the application will be rendered by reference to embodiments thereof which are illustrated in the appended drawings and which are intended to represent only some, but not all, of the embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application. The application will be described in detail with reference to preferred embodiments. A plurality of specific examples and comparative examples are given below, wherein the proportions of the components are mass percentages, and the sum of the mass percentages of the constituent materials of each of the environment-friendly mixed refrigerants is 100%, and the specific examples and comparative examples are constituted as shown in Table 2.
Example 1
The three components of monofluoromethane (R41), propane (R290) and 1, 2-tetrafluoroethane (R134 a) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 15:80:5, so as to obtain the environment-friendly mixed refrigerant.
Example 2
The three components of monofluoromethane (R41), propane (R290) and 1, 2-tetrafluoroethane (R134 a) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 25:70:5, so as to obtain the environment-friendly mixed refrigerant.
Example 3
The three components of monofluoromethane (R41), propane (R290) and 1, 2-tetrafluoroethane (R134 a) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 30:65:5, so as to obtain the environment-friendly mixed refrigerant.
Example 4
The three components of the monofluoromethane (R41), the propane (R290) and the dimethyl ether (RE 170) are mixed evenly and physically at the normal temperature and liquid phase according to the mass ratio of 45:40:15, so as to obtain the environment-friendly mixed refrigerant.
Example 5
The three components of the monofluoromethane (R41), the propane (R290) and the dimethyl ether (RE 170) are mixed evenly and physically at the normal temperature and liquid phase according to the mass ratio of 80:5:15, so as to obtain the environment-friendly mixed refrigerant.
Example 6
The three components of the monofluoromethane (R41), the propane (R290) and the dimethyl ether (RE 170) are mixed evenly and physically at the normal temperature and liquid phase according to the mass ratio of 20:70:10, so as to obtain the environment-friendly mixed refrigerant.
Example 7
The three components of the monofluoromethane (R41), the propane (R290) and the dimethyl ether (RE 170) are mixed evenly and physically at the normal temperature and liquid phase according to the mass ratio of 15:35:50, so as to obtain the environment-friendly mixed refrigerant.
Example 8
The three components of monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 15:25:60, so as to obtain the environment-friendly mixed refrigerant.
Example 9
The three components of the monofluoromethane (R41), the propane (R290) and the 1, 1-difluoroethane (R152 a) are mixed physically and uniformly in a mass ratio of 20:75:5 at normal temperature under liquid phase, so as to obtain the environment-friendly mixed refrigerant.
Example 10
The three components of monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 80:5:15, so as to obtain the environment-friendly mixed refrigerant.
Example 11
The three components of monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) are mixed evenly and physically at normal temperature and liquid phase according to the mass ratio of 5:25:70, so as to obtain the environment-friendly mixed refrigerant.
Example 12
The three components of monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 10:10:80, so as to obtain the environment-friendly mixed refrigerant.
Example 13
The three components of monofluoromethane (R41), propane (R290) and trifluoroiodomethane (CF 3I) are mixed evenly and physically at normal temperature and liquid phase according to the mass ratio of 40:5:55, so as to obtain the environment-friendly mixed refrigerant.
Example 14
The three components of monofluoromethane (R41), propane (R290) and trifluoroiodomethane (CF 3I) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 50:15:35, so as to obtain the environment-friendly mixed refrigerant.
Example 15
The three components of monofluoromethane (R41), propane (R290) and trifluoroiodomethane (CF 3I) are mixed evenly and physically at normal temperature and liquid phase according to the mass ratio of 40:20:40, so as to obtain the environment-friendly mixed refrigerant.
Example 16
The three components of the monofluoromethane (R41), the propane (R290) and the isobutane (R600 a) are mixed evenly and physically at the normal temperature and liquid phase according to the mass ratio of 10:80:10, so as to obtain the environment-friendly mixed refrigerant.
Example 17
The three components of the monofluoromethane (R41), the propane (R290) and the isobutane (R600 a) are physically and uniformly mixed according to the mass ratio of 80:5:15 at the normal temperature and the liquid phase to obtain the environment-friendly mixed refrigerant.
Example 18
The three components of monofluoromethane (R41), propane (R290) and isobutane (R600 a) are mixed evenly and physically at normal temperature and liquid phase according to the mass ratio of 5:55:40, so as to obtain the environment-friendly mixed refrigerant.
Example 19
The three components of monofluoromethane (R41), propane (R290) and n-butane (R600) are mixed evenly and physically according to the mass ratio of 5:80:15 at normal temperature and liquid phase to obtain an environment-friendly mixed refrigerant
Example 20
The three components of the monofluoromethane (R41), the propane (R290) and the n-butane (R600) are mixed evenly and physically at the normal temperature and liquid phase according to the mass ratio of 85:5:10, so as to obtain the environment-friendly mixed refrigerant.
Example 21
The three components of monofluoromethane (R41), propane (R290) and n-butane (R600) are mixed evenly and physically at normal temperature and liquid phase according to the mass ratio of 5:70:25, so as to obtain the environment-friendly mixed refrigerant.
Example 22
The three components of the monofluoromethane (R41), the propane (R290) and the n-butane (R600) are mixed evenly and physically at the normal temperature and liquid phase according to the mass ratio of 10:85:5, so as to obtain the environment-friendly mixed refrigerant.
Comparative example 1
The three components of monofluoromethane (R41), propane (R290) and 1, 2-tetrafluoroethane (R134 a) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 85:5:10, so as to obtain the environment-friendly mixed refrigerant.
Comparative example 2
The three components of the monofluoromethane (R41), the propane (R290) and the dimethyl ether (RE 170) are mixed evenly and physically at the normal temperature and liquid phase according to the mass ratio of 85:10:5, so as to obtain the environment-friendly mixed refrigerant.
Comparative example 3
The three components of monofluoromethane (R41), propane (R290) and 1, 1-difluoroethane (R152 a) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 75:15:10, so as to obtain the environment-friendly mixed refrigerant.
Comparative example 4
The three components of monofluoromethane (R41), propane (R290) and trifluoroiodomethane (CF 3I) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 75:5:20, so as to obtain the environment-friendly mixed refrigerant.
Comparative example 5
The three components of the monofluoromethane (R41), the propane (R290) and the isobutane (R600 a) are physically and uniformly mixed according to the mass ratio of 90:5:5 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.
Comparative example 6
The three components of the monofluoromethane (R41), the propane (R290) and the n-butane (R600) are physically and uniformly mixed according to the mass ratio of 90:5:5 at the normal temperature liquid phase, so as to obtain the environment-friendly mixed refrigerant.
Comparative example 7
The three components of monofluoromethane (R41), propane (R290) and 2,3 tetrafluoropropene (R1234 yf) are mixed evenly physically and physically at normal temperature under liquid phase according to the mass ratio of 80:10:10, so as to obtain the environment-friendly mixed refrigerant.
Comparative example 8
The three components of the monofluoromethane (R41), the propylene (R1270) and the dimethyl ether (RE 170) are mixed evenly and physically at the normal temperature liquid phase according to the mass ratio of 90:5:5, so as to obtain the environment-friendly mixed refrigerant.
Comparative example 9
The three components of propylene (R1270), propane (R290) and dimethyl ether (RE 170) are mixed evenly and physically at the normal temperature and liquid phase according to the mass ratio of 25:65:10, thus obtaining the environment-friendly mixed refrigerant.
Table 2 composition of ingredients of examples and comparative examples
Refrigerant and method for producing the same First component Second component Third component Mass ratio
Example 1 R41 R290 R134a 15:80:5
Example 2 R41 R290 R134a 25:70:5
Example 3 R41 R290 R134a 30:65:5
Example 4 R41 R290 RE170 45:40:15
Example 5 R41 R290 RE170 80:5:15
Example 6 R41 R290 RE170 20:70:10
Example 7 R41 R290 RE170 15:35:50
Example 8 R41 R290 R152a 15:25:60
Example 9 R41 R290 R152a 20:75:5
Example 10 R41 R290 R152a 80:5:15
Example 11 R41 R290 R152a 5:25:70
Example 12 R41 R290 R152a 10:10:80
Example 13 R41 R290 CF3I 40:5:55
Example 14 R41 R290 CF3I 50:15:35
Example 15 R41 R290 CF3I 40:20:40
Example 16 R41 R290 R600a 10:80:10
Example 17 R41 R290 R600a 80:5:15
Example 18 R41 R290 R600a 5:55:40
Example 19 R41 R290 R600 5:80:15
Example 20 R41 R290 R600 85:5:10
Example 21 R41 R290 R600 5:70:25
Example 22 R41 R290 R600 10:85:5
Comparative example 1 R41 R290 R134a 85:5:10
Comparative example 2 R41 R290 RE170 85:10:5
Comparative example 3 R41 R290 R152a 75:15:10
Comparative example 4 R41 R290 CF3I 75:5:20
Comparative example 5 R41 R290 R600a 90:5:5
Comparative example 6 R41 R290 R600 90:5:5
Comparative example 7 R41 R290 R1234yf 80:10:10
Comparative example 8 R41 R1270 RE170 90:5:5
Comparative example 9 R1270 R290 RE170 25:65:10
The embodiment of the application protects the application of the environment-friendly mixed refrigerant as the refrigerant of the refrigerating system. The environment-friendly mixed refrigerant provided by the embodiments of the application can be used as a refrigerant in a refrigeration device, the refrigeration device comprises a compressor, a condenser, an evaporator and an expansion device as main components, and a heat transfer fluid working medium in a refrigeration device system is the composition obtained in the embodiment or the comparative example. The evaporator and condenser are heat exchangers, and any type of heat exchanger, preferably a heat exchanger with a countercurrent tendency, may be used in the present application.
The basic parameters of the molecular weights, normal boiling points, critical temperatures, critical pressures, environmental properties, slip temperatures, etc. of examples 1 to 22, comparative examples 1 to 9 and R134a according to the present application are shown in Table 3.
TABLE 3 basic parameters of examples, comparative examples and R134a
( * And (3) injection: slip temperature is the difference between dew point temperature and bubble point temperature at operating pressure )
As can be seen from Table 3, the environmental protection of the refrigerants provided in examples 1-22 of the present application is significantly better than R134a, and the GWP of all examples is less than or equal to 150. The sliding temperature of the refrigerant obtained by each embodiment is between 7.4 ℃ and 25 ℃, and the small temperature difference heat exchange at each part of the heat exchanger can be realized by utilizing the matching of the sliding temperature and the temperature difference between the inlet and the outlet of the heat exchange medium, so that the irreversible loss in the heat exchange process is reduced, and the aim of improving the energy efficiency is fulfilled. The mass ratio of each component in comparative examples 1 to 6 was not in the range provided in the examples of the present application, and the obtained refrigerant was small in temperature slippage. Taking a non-azeotropic working medium consisting of three components of R41, R290 and RE170 as an example, one of the three components is replaced in comparative examples 7-9, the components of the other two components are kept unchanged, and the energy efficiency lifting amplitude of the system is reduced compared with that of the embodiment of the application. And some of the comparative examples have GWPs greater than 150.
In order to compare the performance effects of the system used as a refrigerant in each of the examples and comparative examples, the design conditions of the refrigeration apparatus were selected to be specifically: the inlet and outlet temperatures of the evaporator side heat exchange fluid are 300.15K and 287.65K, respectively, the inlet and outlet temperatures of the condenser side heat exchange fluid are 287.65K and 314.15K, the logarithmic averages Wen Chafen of the evaporator and condenser are 11K and 10K, respectively, the refrigerant at the outlet of the evaporator is in a superheated state, the degree of superheat is 1K, the refrigerant at the outlet of the condenser is in a supercooled state, the outlet temperature is 291.15K, and the adiabatic efficiency of the compressor is 0.7. The performance parameters of the circulation of the refrigerants of examples 1 to 22, comparative examples 1 to 9 and R134a in the refrigeration system under the above conditions were respectively tested and calculated to obtain the indexes of the discharge temperature, the compression ratio, the relative unit volume refrigeration capacity Qv (unit volume refrigeration capacity ratio with R134 a) and the EER lift amplitude (compared with R134 a), and the like, and are recorded in table 4.
As can be seen from Table 4, the thermal performance of the environment-friendly refrigerant provided by the application is superior to R134a, the refrigerating capacity per unit volume is far higher than that of R134a, the system filling amount can be reduced, the system volume is lightened, and the compression ratio of the compressor can be obviously reduced by the refrigerant of each embodiment. By adopting the mixed refrigerant in the embodiment of the application and matching with corresponding flow path configuration, the energy efficiency of the mixed refrigerant system can be improved by 10.1-22.6% compared with R134 a. The EER increases in comparative examples 1-9 are less than those in examples 1-22. When the mass ratio and the material composition of each component provided by the embodiment of the application are described, the characteristics among the materials and the heat transfer condition of the fluid on the inner side and the outer side of the heat exchanger are well balanced, so that the refrigerant can be ensured to have good environmental characteristics, and the energy efficiency of the system can be effectively improved.
Table 4 system performance test data for each of the examples, comparative examples, and R134a refrigerant
As can be seen from the data in tables 3 and 4, the embodiments of the present application fully consider the properties of the components in the composition, and define the mass ratio range of the components, so as to ensure that the GWP of the environment-friendly mixed refrigerant is less than 150, and meanwhile, the energy efficiency of the system is greatly improved. Therefore, the refrigerant provided by the application can give consideration to both GWP and system energy efficiency, and becomes a good alternative scheme of the high GWP working medium under the trend that the refrigerant is accelerated to develop towards the direction of zero ODP and low GWP.
In summary, the environment-friendly mixed refrigerant provided by the embodiments of the application not only has the environment-friendly characteristic of low GWP, but also has the system performance equivalent to or even better than that of R134a, and can better replace R134 a.
The embodiment of the application also correspondingly protects the refrigerating system using the environment-friendly mixed refrigerant provided by the embodiment of the application as a working medium, and the refrigerating system can be applied to electrical equipment including but not limited to an air conditioner, a refrigerator, a dehumidifier and the like, and other components and working principles of the refrigerating system are applicable to the prior art and are not repeated here.
In this specification, some embodiments are described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are enough to refer to each other.
The foregoing is only a specific embodiment of the application to enable those skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (4)

1. An environment-friendly mixed refrigerant is characterized by comprising a first component, a second component and a third component, wherein the first component is monofluoromethane, the second component is propane, the third component is one selected from 1, 2-tetrafluoroethane, dimethyl ethyl ether, 1-difluoroethane, trifluoroiodomethane, isobutane and n-butane, and the GWP value of the environment-friendly mixed refrigerant is not more than 150; the environment-friendly mixed refrigerant is selected from any one of the following:
(1) The environment-friendly mixed refrigerant consists of 15-30% of monofluoromethane, 65-80% of propane and 5% of 1, 2-tetrafluoroethane in percentage by mass;
(2) The environment-friendly mixed refrigerant consists of 15-80% of monofluoromethane, 5-70% of propane and 10-50% of dimethyl ether by mass percent;
(3) The environment-friendly mixed refrigerant consists of 5-80% of monofluoromethane, 5-75% of propane and 5-80% of 1, 1-difluoroethane in percentage by mass;
(4) The environment-friendly mixed refrigerant consists of 40-50% of monofluoromethane, 5-20% of propane and 35-55% of trifluoroiodomethane in percentage by mass;
(5) The environment-friendly mixed refrigerant consists of 5-80% of monofluoromethane, 5-80% of propane and 10-40% of isobutane in percentage by mass;
(6) The environment-friendly mixed refrigerant consists of 5-85% of monofluoromethane, 5-85% of propane and 5-25% of n-butane in percentage by mass.
2. A method of preparing the environment-friendly mixed refrigerant as claimed in claim 1, wherein the method comprises the steps of: and mixing and stirring all components of the environment-friendly mixed refrigerant in a normal temperature and normal pressure liquid phase state to obtain the environment-friendly mixed refrigerant.
3. Use of the mixed refrigerant of claim 1 in a refrigeration system.
4. A refrigeration system comprising a working fluid, wherein the working fluid comprises the environmentally friendly mixed refrigerant of claim 1.
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