CN115537183A - 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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CN115537183A
CN115537183A CN202211176689.4A CN202211176689A CN115537183A CN 115537183 A CN115537183 A CN 115537183A CN 202211176689 A CN202211176689 A CN 202211176689A CN 115537183 A CN115537183 A CN 115537183A
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mixed refrigerant
environment
component
friendly mixed
trifluoroiodomethane
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皇甫启捷
徐璐
黄泽清
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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
    • 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
    • C09K2205/126—Unsaturated fluorinated 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
    • C09K2205/22—All components of a mixture being fluoro compounds
    • 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
    • C09K2205/34—The mixture being non-azeotropic
    • 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
    • C09K2205/40—Replacement mixtures
    • 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
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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 refrigeration system. The environment-friendly mixed refrigerant comprises a first component, a second component and a third component, wherein the first component is 1, 2-trifluoroethylene, the second component is trifluoroiodomethane, the third component is selected from one of 1, 3-tetrafluoropropene, isobutane, n-butane and 1, 3-pentafluoropropane, and the green mixed refrigerant has a GWP value of not more than 150. The environment-friendly mixed refrigerant has good environmental protection performance, GWP (global warming potential) is less than or equal to 150, and can reduce heat exchange temperature difference, reduce irreversible loss in a heat exchange process, enable system circulation to be close to Lorenz circulation and improve system energy efficiency.

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 global warming and the frequent occurrence of extreme weather, a series of policies have been internationally made to accelerate the elimination of HCFCs refrigerants and gradually reduce the amount of HFCs used, so as to restrict the use of high GWP refrigerants. According to the relevant protocol, the next generation refrigerant should have zero ODP, low GWP. At present, the warming potential (GWP is more than or equal to 1300) of refrigerants such as HFCs refrigerants R134A, R410A, R134A, R404A, R407C and the like widely applied to the refrigeration and air-conditioning industry is very high, so that alternative working media with excellent environmental protection performance are urgently needed to be found. With the further enhancement of the domestic and foreign refrigerant control of high Global Warming Potential (GWP), HFCs refrigerants such as R134a face to be cut down and eliminated.
Because no better alternative scheme is found in pure working medium at present, the mixed refrigerant can balance the characteristics of all refrigerants, and the research on the mixed refrigerant becomes a hotspot of refrigerant research. Therefore, a refrigerant with good environmental protection performance and thermal performance equivalent to or even better than that of the existing refrigerant needs to be replaced so as to meet the requirements of refrigerant environmental protection and high system energy efficiency to the maximum extent.
Disclosure of Invention
In order to solve the technical problem of poor environmental protection performance of related refrigerants in the prior art, the invention mainly aims to provide an environment-friendly mixed refrigerant, form an alternative refrigerant with lower GWP and equivalent or even better thermodynamic performance compared with the existing refrigerant, and provide a preparation method of the refrigerant and a refrigeration system applying the refrigerant.
In order to achieve the above object, according to a first aspect of the present invention, there is provided an environment-friendly mixed refrigerant.
An eco-friendly mixed refrigerant according to an embodiment of the present application, comprising a first component, which is 1, 2-trifluoroethylene, a second component, which is trifluoroiodomethane, the third component is selected from one of 1, 3-tetrafluoropropene, isobutane, n-butane and 1, 3-pentafluoropropane, and the green mixed refrigerant has a GWP value of not more than 150.
Further, the third component is 1, 3-tetrafluoropropene, and the environment-friendly mixed refrigerant comprises, by mass, 35-70% of 1, 2-trifluoroethylene, 5-60% of trifluoroiodomethane, and 5-60% of trans-1, 3-tetrafluoropropene.
Further, the third component is isobutane, and the environment-friendly mixed refrigerant comprises, by mass, 5-75% of 1, 2-trifluoroethylene, 5-40% of trifluoroiodomethane and 10-20% of isobutane.
Further, the environment-friendly mixed refrigerant comprises 75% of 1, 2-trifluoroethylene, 5% of trifluoroiodomethane and 20% of isobutane in percentage by mass.
Further, the third component is n-butane, and the environment-friendly mixed refrigerant comprises 50-85% of 1, 2-trifluoroethylene, 5-45% of trifluoroiodomethane and 5-15% of n-butane in percentage by mass.
Further, the third component is 1, 3-pentafluoropropane, in mass percent, the environment-friendly mixed refrigerant comprises 40-85% of 1, 2-trifluoroethylene, 5-55% of trifluoroiodomethane and 5-15% of 1, 3-pentafluoropropane.
Further, the environment-friendly mixed refrigerant comprises 85% of 1, 2-trifluoroethylene, 5% of trifluoroiodomethane and 10% of 1, 3-pentafluoropropane in percentage by mass.
In order to achieve the above object, according to a second aspect of the present invention, there is provided a method for preparing an environmentally friendly mixed refrigerant, for preparing the environmentally friendly mixed refrigerant provided by the first aspect of the embodiments of the present invention, the method comprising the steps of: the components of the environment-friendly mixed refrigerant are physically mixed in a normal-temperature liquid-phase state to form a ternary composition.
In order to achieve the above object, according to a third aspect of the present invention, there is also disclosed a use of the eco-friendly mixed refrigerant of the first aspect in a refrigeration system.
In order to achieve the above object, according to a fourth aspect of the present invention, there is also provided a refrigeration system, including a working medium, where the working medium includes the environment-friendly mixed refrigerant provided by the first aspect of the embodiments of the present invention.
The environment-friendly mixed refrigerant provided by the embodiment of the invention has good environmental protection performance, the GWP is less than or equal to 150, the heat exchange temperature difference can be reduced, the irreversible loss in the heat exchange process is reduced, the system circulation is close to Lorenz circulation, and the system energy efficiency is improved.
Detailed Description
In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, and not all 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.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this 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 explicitly listed, but may include other elements not expressly listed or inherent to such product or apparatus. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The preparation method of the environment-friendly mixed refrigerant provided by the embodiment of the invention is that the components of the environment-friendly mixed refrigerant are physically mixed according to the corresponding mass ratio in a normal-temperature liquid-phase state to form a ternary composition, and the ternary composition can be specifically mixed and stirred in the normal-temperature liquid-phase state to prepare the environment-friendly mixed refrigerant. The basic parameters of each component substance in the environment-friendly mixed refrigerant in the embodiment of the invention are shown in Table 1.
TABLE 1 basic parameters of each component substance in the environmentally friendly mixed refrigerant
Figure BDA0003864786360000041
The environment-friendly mixed refrigerant of the embodiment of the application comprises a first component, a second component and a third component, wherein the first component is 1, 2-trifluoroethylene, the second component is trifluoroiodomethane, the third component is selected from one of the inverse formulas 1, 3-tetrafluoropropene, isobutane, n-butane and 1, 3-pentafluoropropane, and the green mixed refrigerant has a GWP value of not more than 150.
Optionally, the third component is 1, 3-tetrafluoropropene, and the environmentally-friendly mixed refrigerant comprises, by mass percent, 35-70% of 1, 2-trifluoroethylene, 5-60% of trifluoroiodomethane, and 5-60% of trans-1, 3-tetrafluoropropene; optionally, the third component is isobutane, and the environmentally-friendly mixed refrigerant comprises, by mass, 5-75% of 1, 2-trifluoroethylene, 5-40% of trifluoroiodomethane and 10-20% of isobutane, and further preferably comprises 75% of 1, 2-trifluoroethylene, 5% of trifluoroiodomethane and 20% of isobutane; optionally, the third component is n-butane, and the environment-friendly mixed refrigerant comprises 50-85% of 1, 2-trifluoroethylene, 5-45% of trifluoroiodomethane and 5-15% of n-butane in percentage by mass; optionally, a third component is 1, 3-pentafluoropropane, in mass percent, the environment-friendly mixed refrigerant comprises 40-85% of 1, 2-trifluoroethylene, 5-55% of trifluoroiodomethane and 5-15% of 1, 3-pentafluoropropane, the environment-friendly mixed refrigerant further preferably includes 85% of 1, 2-trifluoroethylene, 5% of trifluoroiodomethane, and 10% of 1, 3-pentafluoropropane.
The environment-friendly mixed refrigerant with the ratio can balance the property characteristics of each component, and the temperature slippage of the non-azeotropic refrigerant can make the system circulation approach to Lorenz circulation, so that the refrigerant has good environmental protection, the GWP is less than or equal to 150, the heat exchange temperature difference can be reduced, the irreversible loss in the heat exchange process is reduced, the system circulation approaches to Lorenz circulation, and the system energy efficiency is improved.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions will be clearly and completely described below in conjunction with the embodiments of the present application, and the described embodiments are only a part of the embodiments of the present application, but not all 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. The present application will be described in detail below with reference to preferred embodiments. Specific examples and comparative examples are given below, in which the proportions of the components are all in mass percent, and the sum of the mass percentages of the component substances for each environment-friendly mixed refrigerant is 100%, and the constitutions of the specific examples and comparative examples are shown in table 2.
Example 1
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and trans-1, 3-tetrafluoropropene (R1234 ze (E)) are physically and uniformly mixed at a normal temperature and a liquid phase according to the mass percent of 35.
Example 2
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and trans-1, 3-tetrafluoropropene (R1234 ze (E)) are physically and uniformly mixed at a normal temperature and a liquid phase according to the mass percent of 35.
Example 3
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and trans-1, 3-tetrafluoropropene (R1234 ze (E)) are physically and uniformly mixed at a normal temperature and a liquid phase according to a mass percentage of 45.
Example 4
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and trans-1, 3-tetrafluoropropene (R1234 ze (E)) are physically and uniformly mixed at a normal temperature and a liquid phase according to a mass percentage of 70.
Example 5
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and isobutane (R600 a) are physically and uniformly mixed at a normal-temperature liquid phase according to the mass percentage of 50.
Example 6
1,2, namely trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and isobutane (R600 a) are physically and uniformly mixed at a normal-temperature liquid phase according to the mass percentage of 70.
Example 7
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and isobutane (R600 a) are physically and uniformly mixed at a normal-temperature liquid phase according to the mass percentage of 75.
Example 8
1,2, namely trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and n-butane (R600) are physically and uniformly mixed at a normal temperature and a liquid phase according to the mass percent of 50.
Example 9
1,2, namely trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and n-butane (R600) are physically and uniformly mixed at a normal temperature and a liquid phase according to the mass percent of 70.
Example 10
1,2, namely trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and n-butane (R600) are physically and uniformly mixed at a normal temperature and a liquid phase according to the mass percent of 80.
Example 11
1,2, namely trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and n-butane (R600) are physically and uniformly mixed at a normal temperature and a liquid phase according to the mass percent of 85.
Example 12
The environment-friendly mixed refrigerant is obtained by physically and uniformly mixing three components, namely 1, 2-trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and 1, 3-pentafluoropropane (R245 fa), according to the mass percentage of 40.
Example 13
The environment-friendly mixed refrigerant is prepared by physically and uniformly mixing 1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and 1,3 pentafluoropropane (R245 fa) according to the mass percentage of 65.
Example 14
The environment-friendly mixed refrigerant is obtained by physically and uniformly mixing three components, namely 1, 2-trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and 1, 3-pentafluoropropane (R245 fa), according to the mass percentage of 80.
Example 15
The environment-friendly mixed refrigerant is prepared by physically and uniformly mixing three components, namely 1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and 1,3 pentafluoropropane (R245 fa), according to the mass percentage of 85.
Comparative example 1
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and trans-1, 3-tetrafluoropropene (R1234 ze (E)) were physically and uniformly mixed at a normal temperature in a liquid phase at a ratio of 5% by mass to obtain a mixed refrigerant.
Comparative example 2
1, 2-trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and trans-1, 3-tetrafluoropropene (R1234 ze (E)) were physically and uniformly mixed at a normal temperature in a liquid phase at a ratio of 15% by mass to 80% by mass to obtain a mixed refrigerant.
Comparative example 3
1, 2-trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and trans-1, 3-tetrafluoropropene (R1234 ze (E)) were physically and uniformly mixed at a normal-temperature liquid phase by mass ratio of 90.
Comparative example 4
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and isobutane (R600 a) are physically and uniformly mixed at a normal-temperature liquid phase according to the mass percentage of 15.
Comparative example 5
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and isobutane (R600 a) are physically and uniformly mixed at a normal-temperature liquid phase according to the mass percentage of 20.
Comparative example 6
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and isobutane (R600 a) are physically and uniformly mixed at a normal-temperature liquid phase according to the mass percentage of 25.
Comparative example 7
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and n-butane (R600) were physically and uniformly mixed at a normal temperature in a liquid phase in an amount of 10% by mass.
Comparative example 8
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and n-butane (R600) are physically and uniformly mixed at a normal temperature in a liquid phase according to a mass percentage of 30.
Comparative example 9
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and 1,3 pentafluoropropane (R245 fa) are physically and uniformly mixed at a normal temperature and a liquid phase according to the mass percent of 5.
Comparative example 10
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and 1,3 pentafluoropropane (R245 fa) are physically and uniformly mixed at a normal temperature and a liquid phase according to the mass percentage of 5.
Comparative example 11
1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and 1,3 pentafluoropropane (R245 fa) are physically and uniformly mixed at a normal temperature in a liquid phase according to the mass percentage of 10.
Comparative example 12
The three components of pentafluoroethane (R125), trifluoroiodomethane (CF 3I) and 1, 3-pentafluoropropane (R245 fa) are physically and uniformly mixed at a normal-temperature liquid phase according to the mass percent of 10.
Comparative example 13
1, 2-trifluoroethylene (R1123), pentafluoroethane (R125) and trans-1, 3-tetrafluoropropene (R1234 ze (E)) were physically and uniformly mixed at a normal temperature in a liquid phase at a ratio of 90% by mass to 5% by mass to obtain a mixed refrigerant.
Comparative example 14
Three components of 1,2 trifluoroethylene (R1123), trifluoroiodomethane (CF 3I) and 1,2,3 heptafluoropropane (R227 ea) are physically and uniformly mixed at a normal temperature and a liquid phase according to the mass percentage of 10.
The embodiment of the invention protects the application of environment-friendly mixed refrigerant used as the refrigerant of a refrigerating system. The environment-friendly mixed refrigerant provided by each embodiment of the invention can be used as a refrigerant to be applied to a refrigerating device, the main components of the refrigerating device are a compressor, a condenser, an evaporator and a throttling device, and a heat transfer fluid working medium in a refrigerating 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 can be used in the present invention, and in particular a parallel flow heat exchanger, or preferably a heat exchanger with a tendency to counter-flow.
TABLE 2 composition of ingredients of each example and comparative example
Refrigerant composition First component Second component Third component Mass ratio of
Example 1 R1123 CF3I R1234ze(E) 15:80:5
Example 2 R1123 CF3I R1234ze(E) 25:70:5
Example 3 R1123 CF3I R1234ze(E) 30:65:5
Example 4 R1123 CF3I R1234ze(E) 45:40:15
Example 5 R1123 CF3I R600a 80:5:15
Example 6 R1123 CF3I R600a 20:70:10
Example 7 R1123 CF3I R600a 15:35:50
Example 8 R1123 CF3I R600 15:25:60
Example 9 R1123 CF3I R600 20:75:5
Example 10 R1123 CF3I R600 80:5:15
Example 11 R1123 CF3I R600 5:25:70
Example 12 R1123 CF3I R245fa 10:10:80
Example 13 R1123 CF3I R245fa 40:5:55
Example 14 R1123 CF3I R245fa 50:15:35
Example 15 R1123 CF3I R245fa 40:20:40
Comparative example 1 R1123 CF3I R1234ze(E) 10:80:10
Comparative example 2 R1123 CF3I R1234ze(E) 80:5:15
Comparative example 3 R1123 CF3I R1234ze(E) 5:55:40
Comparative example 4 R1123 CF3I R600a 5:80:15
Comparative example 5 R1123 CF3I R600a 85:5:10
Comparative example 6 R1123 CF3I R600a 5:70:25
Comparative example 7 R1123 CF3I R600 10:85:5
Comparative example 8 R1123 CF3I R600 85:5:10
Comparative example 9 R1123 CF3I R245fa 85:10:5
Comparative example 10 R1123 CF3I R245fa 75:15:10
Comparative example 11 R1123 CF3I R245fa 75:5:20
Comparative example 12 R125 CF3I R245fa 90:5:5
Comparative example 13 R1123 R125 R1234ze(E) 90:5:5
Comparative example 14 R1123 CF3I R227ea 80:10:10
The basic parameters of the molecular weight, the normal boiling point, the critical temperature, the critical pressure, the environmental properties, the slip temperature, and the like of examples 1 to 15 of the present invention, comparative examples 1 to 14, and R134a are shown in Table 3.
TABLE 3 basic parameters of the examples, comparative examples and R134a
Figure BDA0003864786360000121
( * Note: the slip temperature is the difference between the dew point temperature and the bubble point temperature at the working pressure )
As can be seen from Table 3, the refrigerants provided in examples 1-15 of the present invention have significantly better environmental performance than R134a, and the GWP of all examples is less than or equal to 150. The sliding temperature of the refrigerant obtained in each embodiment is 8.5-19.5 ℃, small-temperature-difference heat exchange at each position of the heat exchanger can be realized by matching the sliding temperature with the inlet-outlet temperature difference of the heat exchange medium, the irreversible loss in the heat exchange process is reduced, and the purpose of improving the energy efficiency is achieved. The mass ratio of each component in comparative examples 1 to 14 is out of the range provided by the embodiment of the invention, and the temperature slippage of the obtained refrigerant is larger or smaller. Taking the non-azeotropic working medium consisting of three components of R1123, CF3I and R1234ze (E) as an example, in comparative examples 12 to 14, one of the three components is replaced, the components of the other two components are kept unchanged, the GWP of the mixed refrigerant is increased (more than 150), and the energy efficiency of the system is improved in a smaller range than that of the embodiment (see Table 4).
In order to compare the performance effects of the systems used as refrigerants in the examples and the comparative examples, the design conditions of the refrigeration device are specifically selected as follows: the inlet and outlet temperatures of the heat exchange fluid at the evaporator side are respectively 300.15K and 287.65K, the inlet and outlet temperatures of the heat exchange fluid at the condenser side are respectively 287.65K and 314.15K, the logarithmic mean temperature difference between the evaporator and the condenser is respectively 11K and 10K, the refrigerant at the outlet of the evaporator is in a superheated state, the superheat degree 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 cycles performed in the refrigeration systems under the above-mentioned operating conditions by using the refrigerants of the above-mentioned examples 1 to 15, comparative examples 1 to 14 and R134a were respectively tested and calculated, and indices such as the discharge temperature, the compression ratio, the relative cooling capacity per unit volume Qv (ratio of the cooling capacity per unit volume to R134 a) and the EER increase amplitude (compared to R134 a) were obtained and recorded in table 4.
As can be seen from Table 4, the thermal performance of the environment-friendly refrigerant provided by the invention is superior to that of R134a, the refrigerating capacity per unit volume is much higher than that of R134a, the filling amount of the system can be reduced, the volume of the system is reduced, and the compression ratio of the compressor can be obviously reduced by the refrigerant in each embodiment. By adopting the mixed refrigerant in the embodiment of the invention and matching with the corresponding flow path configuration, the energy efficiency of the mixed refrigerant system can be improved by 10.2-21.7% compared with R134 a. The EER improvement for comparative examples 1-14 was not as great as for examples 1-15. When the mass ratio and the material composition of the components provided by the embodiment of the application are explained, the characteristics among the components and the heat transfer condition of the fluid at the inner side and the outer side of the heat exchanger are well balanced, so that the refrigerant can have good environmental characteristics, and the energy efficiency of a system can be effectively improved.
TABLE 4 Experimental data for System Performance of examples, comparative examples, and R134a refrigerant
Figure BDA0003864786360000141
As can be seen from the data in tables 3 and 4, in each embodiment of the present invention, the properties of each component in the composition are fully considered, and the mass ratio of each component is defined, so as to ensure that the GWP of the environment-friendly mixed refrigerant is less than 150, and the system energy efficiency is greatly improved. Therefore, the refrigerant provided by the invention can give consideration to GWP and system energy efficiency, and becomes a good alternative scheme of the working medium with high GWP under the trend that the refrigerant is accelerated to develop towards zero ODP and low GWP.
In summary, the environment-friendly mixed refrigerant provided by the embodiments of the present invention not only has the environment-friendly characteristic of low GWP, but also has better system performance than R134a, and can better replace R134 a.
The embodiment of the invention also correspondingly protects a refrigeration system using the environment-friendly mixed refrigerant provided by the embodiment of the invention as a working medium, the refrigeration system can be applied to electric equipment including but not limited to air conditioners, refrigerators, dehumidifiers and the like, and other components and working principles of the refrigeration system are applicable to the prior art and are not described herein again.
Some embodiments in this specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. 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 invention. Thus, the present invention 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 (10)

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 1, 2-trifluoroethylene, the second component is trifluoroiodomethane, the third component is selected from one of the inverse formulas 1, 3-tetrafluoropropene, isobutane, n-butane and 1, 3-pentafluoropropane, and the green mixed refrigerant has a GWP value of not more than 150.
2. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is 1, 3-tetrafluoropropene, and the environment-friendly mixed refrigerant comprises, by mass, 35 to 70% of 1, 2-trifluoroethylene, 5 to 60% of trifluoroiodomethane, and 5 to 60% of trans-1, 3-tetrafluoropropene.
3. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is isobutane, and the environment-friendly mixed refrigerant comprises, by mass, 5-75% of 1, 2-trifluoroethylene, 5-40% of trifluoroiodomethane, and 10-20% of isobutane.
4. The environment-friendly mixed refrigerant according to claim 3, comprising 75% by mass of 1, 2-trifluoroethylene, 5% by mass of trifluoroiodomethane, and 20% by mass of isobutane.
5. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is n-butane, and the environment-friendly mixed refrigerant comprises, in mass percent, 50-85% of 1, 2-trifluoroethylene, 5-45% of trifluoroiodomethane, and 5-15% of n-butane.
6. The environment-friendly mixed refrigerant according to claim 1, wherein the third component is 1, 3-pentafluoropropane, in mass percent, the environment-friendly mixed refrigerant comprises 40-85% of 1, 2-trifluoroethylene, 5-55% of trifluoroiodomethane and 5-15% of 1, 3-pentafluoropropane.
7. The environment-friendly mixed refrigerant according to claim 6, wherein the environment-friendly mixed refrigerant comprises, in mass%, 85% of 1, 2-trifluoroethylene, 5% of trifluoroiodomethane and 10% of 1, 3-pentafluoropropane.
8. The method for preparing the environment-friendly mixed refrigerant as recited in any one of claims 1 to 7, wherein the method comprises the steps of: the components of the environment-friendly mixed refrigerant are physically mixed in a normal-temperature liquid-phase state to form a ternary composition.
9. Use of the environment-friendly mixed refrigerant according to any one of claims 1 to 7 for a refrigeration system.
10. A refrigeration system comprising a working fluid, wherein the working fluid comprises the environmentally friendly mixed refrigerant of any one of claims 1 to 7.
CN202211176689.4A 2022-09-26 2022-09-26 Environment-friendly mixed refrigerant, preparation method and application thereof, and refrigeration system Pending CN115537183A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117106414A (en) * 2023-08-29 2023-11-24 冷迪环境科技(上海)有限公司 Preparation method of environment-friendly refrigerant medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117106414A (en) * 2023-08-29 2023-11-24 冷迪环境科技(上海)有限公司 Preparation method of environment-friendly refrigerant medium
CN117106414B (en) * 2023-08-29 2024-04-30 冷迪环境科技(上海)有限公司 Preparation method of environment-friendly refrigerant medium

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