CN112409992B - Ternary environment-friendly mixed refrigerant, preparation method thereof and refrigeration system - Google Patents

Ternary environment-friendly mixed refrigerant, preparation method thereof and refrigeration system Download PDF

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CN112409992B
CN112409992B CN202010884843.8A CN202010884843A CN112409992B CN 112409992 B CN112409992 B CN 112409992B CN 202010884843 A CN202010884843 A CN 202010884843A CN 112409992 B CN112409992 B CN 112409992B
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mixed refrigerant
friendly
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ternary
ternary environment
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CN112409992A (en
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钟权
赵桓
雷佩玉
黄宇杰
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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
    • C09K2205/122—Halogenated 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
    • C09K2205/40—Replacement mixtures

Abstract

The application relates to the technical field of refrigerants, in particular to a ternary environment-friendly mixed refrigerant, a preparation method of the ternary environment-friendly mixed refrigerant and a refrigeration system. The ternary environment-friendly mixed refrigerant comprises 1, 1-difluoroethane, 2,3,3, 3-tetrafluoropropene and trifluoroiodomethane, and has a GWP value of less than 150 and an ODP value of 0. The ternary environment-friendly mixed refrigerant comprises 40-80% of 1, 1-difluoroethane, 4-64% of 2,3,3, 3-tetrafluoropropene and 4-52% of trifluoroiodomethane in percentage by mole. The preparation method of the ternary environment-friendly mixed system comprises the following steps: and mixing and stirring the components prepared by the ternary environment-friendly mixing in a room-temperature liquid phase state to obtain the ternary environment-friendly mixing preparation. The ternary environment-friendly mixed refrigerant provided by the invention not only has the environment-friendly characteristic of low GWP, but also has the advantages that the refrigerating capacity per unit volume and the system performance coefficient are similar to those of R152a, the flammability is greatly improved, and the ternary environment-friendly mixed refrigerant can well replace R152a refrigerant.

Description

Ternary environment-friendly mixed refrigerant, preparation method thereof and refrigeration system
Technical Field
The application relates to the technical field of refrigerants, in particular to a ternary environment-friendly mixed refrigerant, a preparation method of the ternary environment-friendly mixed refrigerant and a refrigeration system.
Background
In order to reduce the greenhouse effect, the agreement of montreal protocol of 10 months in 2016 reaches the 'basic correction of profit', 18 kinds of Hydrofluorocarbons (HFCs) are listed in a controlled list, the elimination plans of the HFCs are respectively made in developing countries and developed countries, the relevant regulations are actively made in different countries or regions according to the elimination plans of the HFCs, and the environment-friendly working medium with the Global Warming Potential (GWP) lower than 150 is probably to become the final refrigerant. 1, 1-difluoroethane (R152a) has the GWP of 138 and is good in economical efficiency and is an optional refrigerant for the occasions of automobile air-conditioners, household air-conditioners and the like in the future, but R152a is a combustible substance with the safety grade of A2, and the application of the refrigerant is influenced by the environmental protection performance and the flammability of the refrigerant.
Disclosure of Invention
In order to solve the technical problems of poor environmental protection performance and poor flammable performance of R152a in the prior art, the primary object of the present invention is to provide an environment-friendly mixed refrigerant, which is carefully screened from multiple dimensions of environmental protection, safety, physical properties, performance and economy of the refrigerant to form a substitute refrigerant with lower GWP, higher safety and equivalent thermodynamic performance compared with R152a, and to provide a preparation method of the environment-friendly mixed refrigerant and a refrigeration system using the refrigerant.
In order to achieve the above object, according to a first aspect of the present invention, there is provided a ternary environment-friendly mixed refrigerant.
The ternary environment-friendly mixed refrigerant comprises 1, 1-difluoroethane, 2,3,3, 3-tetrafluoropropene and trifluoroiodomethane, and the GWP value of the ternary environment-friendly mixed refrigerant is less than 150.
Further, the ternary environment-friendly mixed refrigerant comprises 40-80% of 1, 1-difluoroethane, 4-64% of 2,3,3, 3-tetrafluoropropene and 4-52% of trifluoroiodomethane in percentage by mole.
Further, the ternary environment-friendly mixed refrigerant comprises 32-64% of 1, 1-difluoroethane, 16-52% of 2,3,3, 3-tetrafluoropropene and 16-36% of trifluoroiodomethane in percentage by mole.
Further, the ternary environment-friendly mixed refrigerant comprises 48-52% of 1, 1-difluoroethane, 28-44% of 2,3,3, 3-tetrafluoropropene and 20-28% of trifluoroiodomethane in percentage by mole.
In order to achieve the above object, according to a second aspect of the present invention, there is provided a method for preparing a ternary environment-friendly mixed system, for preparing the ternary environment-friendly mixed system provided in the first aspect of the embodiments of the present invention, the method comprising the steps of: and mixing and stirring the components prepared by the ternary environment-friendly mixing in a room-temperature liquid phase state to obtain the ternary environment-friendly mixing preparation.
In order to achieve the above object, according to a third aspect of the present invention, there is also provided a refrigeration system, including a working medium, where the working medium includes the ternary environment-friendly hybrid system provided in the first aspect of the embodiments of the present invention.
The ternary environment-friendly mixed refrigerant provided by the invention not only has the environment-friendly characteristic of low GWP, but also has the advantages that the refrigerating capacity per unit volume and the system performance coefficient are similar to those of R152a, the flammability is greatly improved, and the ternary environment-friendly mixed refrigerant can well replace R152a refrigerant.
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 some 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.
It is 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 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 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 ternary environment-friendly mixed refrigerant provided by the embodiment of the invention is that the components of the ternary environment-friendly mixed refrigerant, namely 1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1), are physically mixed into a ternary mixture according to the corresponding mass ratio under the normal temperature and normal pressure liquid phase state, and the ternary environment-friendly mixed refrigerant can be specifically mixed and stirred under the room temperature and normal pressure liquid phase state to prepare the ternary environment-friendly mixed refrigerant. The basic parameters of each component substance in the ternary environment-friendly mixed refrigerant in the embodiment of the invention are shown in the table 1.
TABLE 1 basic parameters of each component substance in ternary environment-friendly mixed refrigerant
Figure GDA0002884393920000031
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 with reference to preferred embodiments. Specific examples are given below in which the proportions of the components are all in mole percent, and the sum of the mole percent of the constituent substances of each ternary environment-friendly mixed refrigerant is 100%.
Example 1
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 32:16:52 to obtain the ternary environment-friendly mixed refrigerant.
Example 2
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 32:64:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 3
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to the molar ratio of 36:12:52 to obtain the ternary environment-friendly mixed refrigerant.
Example 4
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 36:60:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 5
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to the molar ratio of 40:8:52 to obtain the ternary environment-friendly mixed refrigerant.
Example 6
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 40:56:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 7
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 44:4:52 to obtain the ternary environment-friendly mixed refrigerant.
Example 8
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 44:52:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 9
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 48:4:48 to obtain the ternary environment-friendly mixed refrigerant.
Example 10
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 48:24:28 to obtain the ternary environment-friendly mixed refrigerant.
Example 11
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at a molar ratio of 48:48:4 under normal temperature and pressure to obtain the ternary environment-friendly mixed refrigerant.
Example 12
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 52:4:44 to obtain the ternary environment-friendly mixed refrigerant.
Example 13
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 52:20:28 to obtain the ternary environment-friendly mixed refrigerant.
Example 14
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 52:44:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 15
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at a molar ratio of 56:4:40 under normal temperature and pressure in a liquid phase to obtain the ternary environment-friendly mixed refrigerant.
Example 16
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 56:20:24 to obtain the ternary environment-friendly mixed refrigerant.
Example 17
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at a molar ratio of 56:40:4 under normal temperature and pressure liquid phase to obtain the ternary environment-friendly mixed refrigerant.
Example 18
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 60:4:36 to obtain the ternary environment-friendly mixed refrigerant.
Example 19
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and the normal pressure in a liquid phase according to a molar ratio of 60:20:20 to obtain the ternary environment-friendly mixed refrigerant.
Example 20
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 60:36:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 21
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 64:4:32 to obtain the ternary environment-friendly mixed refrigerant.
Example 22
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 64:16:20 to obtain the ternary environment-friendly mixed refrigerant.
Example 23
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 64:32:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 24
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 68:4:28 to obtain the ternary environment-friendly mixed refrigerant.
Example 25
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 68:16:16 to obtain the ternary environment-friendly mixed refrigerant.
Example 26
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 68:28:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 27
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 72:4:24 to obtain the ternary environment-friendly mixed refrigerant.
Example 28
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 72:24:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 29
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 76:4:20 to obtain the ternary environment-friendly mixed refrigerant.
Example 30
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 76:20:4 to obtain the ternary environment-friendly mixed refrigerant.
Example 31
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and the normal pressure in a liquid phase according to a molar ratio of 80:4:16 to obtain the ternary environment-friendly mixed refrigerant.
Example 32
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and the normal pressure in a liquid phase according to a molar ratio of 80:44:48 to obtain the ternary environment-friendly mixed refrigerant.
Comparative example 1
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 8:44:48 to obtain the ternary environment-friendly mixed refrigerant.
Comparative example 2
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 32:4:64 to obtain the ternary environment-friendly mixed refrigerant.
Comparative example 3
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at the normal temperature and pressure and in a liquid phase according to a molar ratio of 6:80:14 to obtain the ternary environment-friendly mixed refrigerant.
Comparative example 4
1, 1-difluoroethane (R152a), 2,3,3, 3-tetrafluoropropene (R1234yf) and trifluoroiodomethane (R13I1) are physically and uniformly mixed at a molar ratio of 92:4:4 under normal temperature and pressure to obtain the ternary environment-friendly mixed refrigerant.
In order to compare the effects of the examples and the comparative examples, the design conditions selected were: the evaporator outlet temperature was 283.15K, the condenser outlet temperature was 313.15K, the vapor phase at the evaporator outlet was in a superheated state, the superheat degree was 5K, the liquid phase at the condenser outlet was in a supercooled state, the supercooling degree was 5K, and the adiabatic efficiency of the compressor was 0.75, which were theoretically calculated using the cycle performance parameters of the refrigerants of examples 1 to 32, comparative examples 1 to 4, and R152a in the refrigeration system, respectively, and the GWP, the relative cooling capacity per unit volume Qv (ratio of cooling capacity per unit volume to R152a), the relative coefficient of performance COP (ratio of coefficient of performance to R152a), the compressor discharge temperature, the compressor pressure ratio, and the temperature glide were compared and recorded in table 2.
As can be seen from Table 2, the ternary environment-friendly mixed refrigerant provided by the invention has environmental performance far better than R152a and has lower GWP. Particularly, the GWP of all refrigerant formulas is less than 150, and the refrigerant has better environmental protection property; the relative unit volume refrigerating capacity of all refrigerant formulas is more than 1, the relative performance coefficient is more than 0.96, and the refrigerating capacity and the energy efficiency are basically equivalent to those of the R152a refrigerant; the compressor discharge temperature and pressure ratio of all refrigerant formulations are lower than R152a, which is beneficial to the whole system; the temperature slip of all refrigerant formulations is less than 1K, and the component variation amplitude caused by system leakage is small. Due to the fact that more than 32% of R152a is used, the economic efficiency is better compared with that of R1234yf and R13I 1; and because of adding the slightly flammable R1234yf and the flame retardant R13I1 to the flammable R152a, the flammability of all refrigerant formulations is much lower than that of R152a, and the higher the proportion of R13I1 in the mixture, the lower the flammability. If one of the three components is not in the molar ratios provided herein, e.g., the amount of R152a in comparative example 1 is less, the economics are poor; as in comparative example 2, the content of R13I1 is higher, the refrigerating capacity per unit volume and COP are both lower, and the temperature slippage of the refrigerant is larger; compared with the comparative example 3, the content of R152a is less, the content of R1234yf is more, and the economical efficiency is poor; and the R152a content is higher as in comparative example 4, so the flammability is stronger.
TABLE 2 Experimental data for the examples and comparative examples
Examples GWP Qv COP Exhaust temperature/K Pressure ratio Temperature glide/K
Example 1 21 1.00 0.96 330.87 2.37 0.66
Example 2 29 1.05 0.97 323.71 2.35 0.14
Example 3 24 1.00 0.96 331.54 2.37 0.58
Example 4 34 1.05 0.97 324.22 2.36 0.18
Example 5 27 1.00 0.97 332.21 2.37 0.50
Example 6 38 1.05 0.97 324.76 2.36 0.22
Example 7 30 1.00 0.97 332.89 2.36 0.39
Example 8 42 1.05 0.97 325.32 2.37 0.26
Example 9 34 1.02 0.98 332.66 2.35 0.22
Example 10 39 1.06 0.98 328.88 2.34 0.18
Example 11 47 1.05 0.97 325.90 2.38 0.31
Example 12 39 1.03 0.98 332.49 2.35 0.11
Example 13 43 1.06 0.98 329.58 2.35 0.21
Example 14 52 1.05 0.98 326.51 2.38 0.36
Example 15 43 1.04 0.99 332.40 2.35 0.06
Example 16 48 1.06 0.98 329.72 2.36 0.30
Example 17 57 1.05 0.98 327.15 2.39 0.41
Example 18 48 1.04 0.99 332.39 2.35 0.08
Example 19 54 1.06 0.98 329.90 2.37 0.42
Example 20 62 1.05 0.98 327.81 2.40 0.46
Example 21 54 1.05 0.99 332.47 2.35 0.15
Example 22 59 1.05 0.98 330.67 2.38 0.46
Example 23 68 1.05 0.98 328.49 2.40 0.51
Example 24 60 1.05 0.99 332.62 2.37 0.27
Example 25 66 1.05 0.98 330.89 2.39 0.58
Example 26 74 1.04 0.98 329.20 2.41 0.56
Example 27 67 1.05 0.99 332.84 2.38 0.40
Example 28 77 1.04 0.98 330.53 2.41 0.66
Example 29 74 1.04 0.99 333.09 2.39 0.53
Example 30 86 1.03 0.98 330.69 2.43 0.62
Example 31 83 1.04 0.98 333.34 2.41 0.64
Example 32 89 1.03 0.98 332.11 2.43 0.70
R152a 138 1.00 1.00 334.50 2.45 0.00
Comparative example 1 6 1.00 0.95 326.29 2.35 0.63
Comparative example 2 20 0.95 0.95 333.77 2.40 1.07
Comparative example 3 5 1.04 0.97 321.64 2.32 0.05
Comparative example 4 115 1.01 0.99 333.82 2.45 0.50
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 (3)

1. The ternary environment-friendly mixed refrigerant is characterized by comprising, by mole percent, 56-80% of 1, 1-difluoroethane, 4-40% of 2,3,3, 3-tetrafluoropropene and 4-40% of trifluoroiodomethane, wherein the GWP value of the ternary environment-friendly mixed refrigerant is less than 150.
2. A method for preparing the ternary environment-friendly mixed refrigerant as claimed in claim 1, wherein the method comprises the following steps: and mixing and stirring the components of the ternary environment-friendly mixed refrigerant in a room-temperature liquid-phase state to obtain the ternary environment-friendly mixed refrigerant.
3. A refrigeration system comprising a working fluid, wherein the working fluid comprises the ternary environment-friendly mixed refrigerant of claim 1.
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