CN110964485B - Mixed refrigerant - Google Patents

Mixed refrigerant Download PDF

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CN110964485B
CN110964485B CN201911128732.8A CN201911128732A CN110964485B CN 110964485 B CN110964485 B CN 110964485B CN 201911128732 A CN201911128732 A CN 201911128732A CN 110964485 B CN110964485 B CN 110964485B
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tetrafluoroethane
tetrafluoropropene
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mixed refrigerant
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CN110964485A (en
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钟权
赵桓
于艳翠
雷佩玉
梁尤轩
黄宇杰
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Gree Electric Appliances Inc of Zhuhai
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    • 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
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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract

The invention provides a mixed refrigerant, which comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane and 2,3,3, 3-tetrafluoropropene, wherein the sum of the molar percentage concentration of each component in the mixed refrigerant is 100%.

Description

Mixed refrigerant
Technical Field
The invention relates to the technical field of refrigerants, in particular to a mixed refrigerant.
Background
R134a is an HFC (hydrofluorocarbon) refrigerant widely used in large-sized air-conditioning centrifugal chiller units, screw units, automobile air conditioners, and the like, and has an ODP (ozone depletion potential) of 0 and a GWP (global warming potential) of 1300. As the global warming problem becomes more severe, a series of laws and regulations are successively enacted to limit the use of refrigerants having high GWP, and the substitution of R134a is also being promoted.
At present, a proper pure substance can not meet a plurality of requirements of people on environment-friendly, safe and efficient refrigerants, and HC (hydrocarbon) and HFO (hydrofluoroolefin) refrigerants with low GWP all face the problem of combustibility. By adding flame retardants to flammable working fluids to form non-flammable working fluids, a mixture of HFC and HFO type refrigerants, which can be made non-flammable and which have a low GWP, is an effective solution.
Disclosure of Invention
In view of the above, the present invention aims to avoid the disadvantages of the prior art and provide a mixed refrigerant, which comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane and 2,3,3, 3-tetrafluoropropene and can be used to replace R134a, wherein the mixed refrigerant has a GWP of less than 600 and an ODP of 0, is non-flammable, and the capacity and energy efficiency of a unit using the mixed environment-friendly refrigerant are equivalent to those of a unit using R134a refrigerant.
The embodiment of the invention provides a mixed refrigerant, which comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane and 2,3,3, 3-tetrafluoropropene, wherein the sum of the molar percentage concentrations of the components in the mixed refrigerant is 100%.
Further, the molar composition of the 1,1,1, 2-tetrafluoroethane is 20-36%, the molar composition of the 1,1,2, 2-tetrafluoroethane is 12-32%, and the molar composition of the 2,3,3, 3-tetrafluoropropene is 48-52%.
Further, the mixed refrigerant also comprises a fourth component, the fourth component is any one of trans-1, 3,3, 3-tetrafluoropropene, pentafluoroethane and 1,1,1,2,3,3, 3-heptafluoropropane, and the sum of the molar percentage concentrations of the 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and the fourth component is 100%.
Further, the mixed refrigerant comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and 1,1,1,2,3,3, 3-heptafluoropropane, and the sum of the mole percentage concentrations of the 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and 1,1,1,2,3,3, 3-heptafluoropropane is 100%.
Further, the molar composition of the 1,1,1, 2-tetrafluoroethane is 16-28%, the molar composition of the 1,1,2, 2-tetrafluoroethane is 4-20%, the molar composition of the 2,3,3, 3-tetrafluoropropene is 60-64%, and the molar composition of the 1,1,1,2,3,3, 3-heptafluoropropane is 4%.
Further, the mixed refrigerant comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and pentafluoroethane, and the sum of the molar percentage concentrations of the 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and pentafluoroethane is 100%.
Further, the molar composition of the 1,1,1, 2-tetrafluoroethane is 4-32%, the molar composition of the 1,1,2, 2-tetrafluoroethane is 4-36%, the molar composition of the 2,3,3, 3-tetrafluoropropene is 56-60%, and the molar composition of the pentafluoroethane is 4%.
Further, the mixed refrigerant comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and trans-1, 3,3, 3-tetrafluoropropene, and the sum of the molar percentage concentrations of the 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and trans-1, 3,3, 3-tetrafluoropropene is 100%.
Further, the molar component of the 1,1,1, 2-tetrafluoroethane is 28-44%, the molar component of the 1,1,2, 2-tetrafluoroethane is 4-24%, the molar component of the 2,3,3, 3-tetrafluoropropene is 32-48%, and the molar component of the trans-1, 3,3, 3-tetrafluoropropene is 4-20%.
Compared with the prior art, the invention has the following beneficial effects: the mixed refrigerant provided by the invention comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane and 2,3,3, 3-tetrafluoropropene, can be used for replacing R134a, has GWP of less than 600 and ODP of 0, is non-combustible, and has the capacity and energy efficiency equivalent to those of a unit using R134a refrigerant.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any manner. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of protection of the present invention.
The embodiment of the invention provides a mixed refrigerant, which comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene, wherein the sum of the molar percentage concentrations of the components in the mixed refrigerant is 100%, further, the molar composition of 1,1,1, 2-tetrafluoroethane is 20-36%, the molar composition of 1,1,2, 2-tetrafluoroethane is 12-32%, and the molar composition of 2,3,3, 3-tetrafluoropropene is 48-52%, and the mixed refrigerant can be used for replacing R134a, has a GWP of less than 600 and an ODP of 0, is non-flammable, and the capacity and energy efficiency of a unit using the mixed environment-friendly refrigerant are equivalent to those of a unit using the R134a refrigerant.
In a preferred embodiment, the mixed refrigerant further comprises a fourth component, wherein the fourth component is any one of trans-1, 3,3, 3-tetrafluoropropene, pentafluoroethane and 1,1,1,2,3,3, 3-heptafluoropropane, and the sum of the molar percentage concentrations of 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and the fourth component is 100%.
In a preferred embodiment, the mixed refrigerant comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and 1,1,1,2,3,3, 3-heptafluoropropane, further comprises 16 to 28% of the molar component of 1,1,1, 2-tetrafluoroethane, 4 to 20% of the molar component of 1,1,2, 2-tetrafluoroethane, 60 to 64% of the molar component of 2,3,3, 3-tetrafluoropropene and 4% of the molar component of 1,1,1,2,3,3, 3-heptafluoropropane.
In a preferred embodiment, the mixed refrigerant comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and pentafluoroethane, and further comprises 4 to 32% of the molar component of 1,1,1, 2-tetrafluoroethane, 4 to 36% of the molar component of 1,1,2, 2-tetrafluoroethane, 56 to 60% of the molar component of 2,3,3, 3-tetrafluoropropene and 4% of the molar component of pentafluoroethane.
In a preferred embodiment, the mixed refrigerant comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and trans-1, 3,3, 3-tetrafluoropropene, further, the molar component of 1,1,1, 2-tetrafluoroethane is 28-44%, the molar component of 1,1,2, 2-tetrafluoroethane is 4-24%, the molar component of 2,3,3, 3-tetrafluoropropene is 32-48%, and the molar component of trans-1, 3,3, 3-tetrafluoropropene is 4-20%.
Wherein, the component, chemical formula, molecular weight (g/mol), standard boiling point (DEG C), ODP and GWP corresponding to each formula name are shown in the following table one:
Figure BDA0002277681060000031
the above technical means of the present invention will be described in detail with reference to examples.
Example 1: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 20%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 32%, and 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 48%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 2: taking 24 percent of 1,1,1, 2-tetrafluoroethane, 28 percent of 1,1,2, 2-tetrafluoroethane and 48 percent of 2,3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 3: taking 28 percent of 1,1,1, 2-tetrafluoroethane, 20 percent of 1,1,2, 2-tetrafluoroethane and 52 percent of 2,3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 4: taking 28 percent of 1,1,1, 2-tetrafluoroethane, 24 percent of 1,1,2, 2-tetrafluoroethane and 48 percent of 2,3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 5: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 32%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 16% and 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 52%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 6: taking 36 mol percent of 1,1,1, 2-tetrafluoroethane, 12 mol percent of 1,1,2, 2-tetrafluoroethane and 52 mol percent of 2,3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 7: taking 16 mol percent of 1,1,1, 2-tetrafluoroethane, 16 mol percent of 1,1,2, 2-tetrafluoroethane, 64 mol percent of 2,3,3, 3-tetrafluoropropene and 4 mol percent of 1,1,1,2,3,3, 3-heptafluoropropane, obtaining the non-flammable mixed refrigerant with lower GWP.
Example 8: taking 16 mol percent of 1,1,1, 2-tetrafluoroethane, 20 mol percent of 1,1,2, 2-tetrafluoroethane, 60 mol percent of 2,3,3, 3-tetrafluoropropene and 4 mol percent of 1,1,1,2,3,3, 3-heptafluoropropane, obtaining the non-flammable mixed refrigerant with lower GWP.
Example 9: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 20%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 12%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 64% and 1,1,1,2,3,3, 3-heptafluoropropane with the molar percentage concentration of 4%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 10: taking 24 percent of 1,1,1, 2-tetrafluoroethane, 8 percent of 1,1,2, 2-tetrafluoroethane, 64 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of 1,1,1,2,3, 3-heptafluoropropane, the mixed refrigerant is non-flammable and has low GWP.
Example 11: taking 28 percent of 1,1,1, 2-tetrafluoroethane, 4 percent of 1,1,2, 2-tetrafluoroethane, 64 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of 1,1,1,2,3, 3-heptafluoropropane to obtain a non-flammable mixed refrigerant with low GWP.
Example 12: taking 4 percent of 1,1,1, 2-tetrafluoroethane, 36 percent of 1,1,2, 2-tetrafluoroethane, 56 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of pentafluoroethane to obtain the mixed refrigerant which is nonflammable and has low GWP.
Example 13: taking 8 percent of 1,1,1, 2-tetrafluoroethane, 32 percent of 1,1,2, 2-tetrafluoroethane, 56 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of pentafluoroethane to obtain the non-flammable mixed refrigerant with low GWP.
Example 14: taking 1,1,1, 2-tetrafluoroethane with the mol percent concentration of 12%, 1,1,2, 2-tetrafluoroethane with the mol percent concentration of 28%, 2,3,3, 3-tetrafluoropropene with the mol percent concentration of 56% and pentafluoroethane with the mol percent concentration of 4%, the mixed refrigerant is non-flammable and has low GWP.
Example 15: taking 16 mol percent of 1,1,1, 2-tetrafluoroethane, 24 mol percent of 1,1,2, 2-tetrafluoroethane, 56 mol percent of 2,3,3, 3-tetrafluoropropene and 4 mol percent of pentafluoroethane, the mixed refrigerant is non-flammable and has low GWP.
Example 16: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 20%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 16%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 60% and pentafluoroethane with the molar percentage concentration of 4%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 17: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 20%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 20%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 56% and pentafluoroethane with the molar percentage concentration of 4%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 18: taking 24 mol percent of 1,1,1, 2-tetrafluoroethane, 12 mol percent of 1,1,2, 2-tetrafluoroethane, 60 mol percent of 2,3,3, 3-tetrafluoropropene and 4 mol percent of pentafluoroethane, the mixed refrigerant is non-flammable and has low GWP.
Example 19: taking 24 mol percent of 1,1,1, 2-tetrafluoroethane, 16 mol percent of 1,1,2, 2-tetrafluoroethane, 56 mol percent of 2,3,3, 3-tetrafluoropropene and 4 mol percent of pentafluoroethane, the mixed refrigerant is non-flammable and has low GWP.
Example 20: taking 28 percent of 1,1,1, 2-tetrafluoroethane, 8 percent of 1,1,2, 2-tetrafluoroethane, 60 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of pentafluoroethane to obtain the mixed refrigerant which is nonflammable and has low GWP.
Example 21: taking 32 percent of 1,1,1, 2-tetrafluoroethane, 4 percent of 1,1,2, 2-tetrafluoroethane, 60 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of pentafluoroethane to obtain the mixed refrigerant which is nonflammable and has low GWP.
Example 22: taking 28 percent of 1,1,1, 2-tetrafluoroethane, 20 percent of 1,1,2, 2-tetrafluoroethane, 44 percent of 2,3,3, 3-tetrafluoropropene and 8 percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 23: taking 28 percent of 1,1,1, 2-tetrafluoroethane, 20 percent of 1,1,2, 2-tetrafluoroethane, 48 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 24: taking 28 percent of 1,1,1, 2-tetrafluoroethane, 24 percent of 1,1,2, 2-tetrafluoroethane, 44 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 25: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 32%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 16%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 4% and trans-1, 3,3, 3-tetrafluoropropene with the molar percentage concentration of 12%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 26: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 32%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 16%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 44% and trans-1, 3,3, 3-tetrafluoropropene with the molar percentage concentration of 8%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 27: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 32%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 16%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 48% and trans-1, 3,3, 3-tetrafluoropropene with the molar percentage concentration of 4%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 28: taking 36 mol percent of 1,1,1, 2-tetrafluoroethane, 12 mol percent of 1,1,2, 2-tetrafluoroethane, 36 mol percent of 2,3,3, 3-tetrafluoropropene and 16 mol percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 29: taking 36 mol percent of 1,1,1, 2-tetrafluoroethane, 12 mol percent of 1,1,2, 2-tetrafluoroethane, 4 mol percent of 2,3,3, 3-tetrafluoropropene and 12 mol percent of trans-1, 3,3, 3-tetrafluoropropene, obtaining the non-flammable mixed refrigerant with low GWP.
Example 30: taking 36 mol percent of 1,1,1, 2-tetrafluoroethane, 12 mol percent of 1,1,2, 2-tetrafluoroethane, 44 mol percent of 2,3,3, 3-tetrafluoropropene and 8 mol percent of trans-1, 3,3, 3-tetrafluoropropene, obtaining the non-flammable mixed refrigerant with low GWP.
Example 31: taking 36 mol percent of 1,1,1, 2-tetrafluoroethane, 12 mol percent of 1,1,2, 2-tetrafluoroethane, 48 mol percent of 2,3,3, 3-tetrafluoropropene and 4 mol percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 32: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 40%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 8%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 36% and trans-1, 3,3, 3-tetrafluoropropene with the molar percentage concentration of 16%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 33: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 40%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 8%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 40% and trans-1, 3,3, 3-tetrafluoropropene with the molar percentage concentration of 12%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 34: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 40%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 8%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 44% and trans-1, 3,3, 3-tetrafluoropropene with the molar percentage concentration of 8%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 35: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 40%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 8%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 48% and trans-1, 3,3, 3-tetrafluoropropene with the molar percentage concentration of 4%, a non-flammable mixed refrigerant with low GWP is obtained.
Example 36: taking 44 mol percent of 1,1,1, 2-tetrafluoroethane, 4 mol percent of 1,1,2, 2-tetrafluoroethane, 32 mol percent of 2,3,3, 3-tetrafluoropropene and 20 mol percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 37: taking 44 mol percent of 1,1,1, 2-tetrafluoroethane, 4 mol percent of 1,1,2, 2-tetrafluoroethane, 36 mol percent of 2,3,3, 3-tetrafluoropropene and 16 mol percent of trans-1, 3,3, 3-tetrafluoropropene, a non-flammable mixed refrigerant with low GWP is obtained.
Example 38: taking 44 mol percent of 1,1,1, 2-tetrafluoroethane, 4 mol percent of 1,1,2, 2-tetrafluoroethane, 40 mol percent of 2,3,3, 3-tetrafluoropropene and 12 mol percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 39: taking 44 mol percent of 1,1,1, 2-tetrafluoroethane, 4 mol percent of 1,1,2, 2-tetrafluoroethane, 44 mol percent of 2,3,3, 3-tetrafluoropropene and 8 mol percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Example 40: taking 44 mol percent of 1,1,1, 2-tetrafluoroethane, 4 mol percent of 1,1,2, 2-tetrafluoroethane, 48 mol percent of 2,3,3, 3-tetrafluoropropene and 4 mol percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Comparative example 1: taking 16 mol percent of 1,1,1, 2-tetrafluoroethane, 32 mol percent of 1,1,2, 2-tetrafluoroethane and 52 mol percent of 2,3,3, 3-tetrafluoropropene, a non-flammable mixed refrigerant with low GWP is obtained.
Comparative example 2: taking 1,1,1, 2-tetrafluoroethane with the mol percent concentration of 40%, 1,1,2, 2-tetrafluoroethane with the mol percent concentration of 12%, and 2,3,3, 3-tetrafluoropropene with the mol percent concentration of 48%, a non-flammable mixed refrigerant with low GWP is obtained.
Comparative example 3: taking 16 mol percent of 1,1,1, 2-tetrafluoroethane, 4 mol percent of 1,1,2, 2-tetrafluoroethane, 60 mol percent of 2,3,3, 3-tetrafluoropropene and 20 mol percent of 1,1,1,2,3,3, 3-heptafluoropropane, obtaining the non-flammable mixed refrigerant with lower GWP.
Comparative example 4: taking 28 percent of 1,1,1, 2-tetrafluoroethane, 20 percent of 1,1,2, 2-tetrafluoroethane, 48 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of 1,1,1,2,3, 3-heptafluoropropane to obtain the non-flammable mixed refrigerant with low GWP.
Comparative example 5: taking 4 percent of 1,1,1, 2-tetrafluoroethane, 16 percent of 1,1,2, 2-tetrafluoroethane, 60 percent of 2,3,3, 3-tetrafluoropropene and 20 percent of pentafluoroethane to obtain the mixed refrigerant which is nonflammable and has low GWP.
Comparative example 6: taking 1,1,1, 2-tetrafluoroethane with the molar percentage concentration of 32%, 1,1,2, 2-tetrafluoroethane with the molar percentage concentration of 36%, 2,3,3, 3-tetrafluoropropene with the molar percentage concentration of 28% and pentafluoroethane with the molar percentage concentration of 4%, a non-flammable mixed refrigerant with low GWP was obtained.
Comparative example 7: taking 60 percent of 1,1,1, 2-tetrafluoroethane, 4 percent of 1,1,2, 2-tetrafluoroethane, 32 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
Comparative example 8: taking 28 percent of 1,1,1, 2-tetrafluoroethane, 4 percent of 1,1,2, 2-tetrafluoroethane, 64 percent of 2,3,3, 3-tetrafluoropropene and 4 percent of trans-1, 3,3, 3-tetrafluoropropene, the mixed refrigerant is non-flammable and has low GWP.
It should be noted that the design condition of the refrigerator is: the outlet temperature of the evaporator is 283.15K, the outlet temperature of the condenser is 313.15K, the gas phase at the outlet of the evaporator is in an overheated state, the degree of superheat is 5K, the liquid phase at the outlet of the condenser is in a supercooled state, the degree of supercooling is 7K, and the adiabatic efficiency of the compressor is 0.7; theoretical calculations were performed using the cycle performance parameters of the above examples, comparative examples, and 1,1,1, 2-tetrafluoroethane refrigerant in a refrigeration system, respectively, to compare GWP, relative specific capacity Qv (to the specific capacity of R134 a), relative coefficient of performance COP (to the coefficient of performance of R134 a), temperature glide, compressor discharge pressure, compressor discharge temperature, and flammability, as shown in table two below:
Figure BDA0002277681060000081
Figure BDA0002277681060000091
watch two
From the above table, it can be seen that: (1) the GWP of the refrigerant prepared in the examples 1-40 is less than 600 and is far lower than that of R134a, so that the refrigerant has obvious advantage in environmental protection;
(2) the relative volumetric refrigeration capacity and the relative performance coefficient of the refrigerant prepared in the embodiments 1 to 40 are both larger than 0.95, and the refrigeration capacity and the energy efficiency are basically equivalent to those of the refrigerant R134 a;
(3) the refrigerants prepared in the embodiments 1-40 are all non-flammable and are safe in use; the discharge pressure and discharge temperature of all the refrigerants are not greatly different from those of R134a, so that the refrigerant can be better used for an R134a refrigeration system;
(4) except for the refrigerant of the embodiment 12, the embodiment 13, the embodiment 14, the embodiment 15, the embodiment 16, the embodiment 17 and the embodiment 19, the temperature glide of the other embodiments is less than 1K, and the composition change of the mixture is small in the using process.
(5) The flammability of comparative example 1 was slightly flammable; comparative example 2, the GWP value is higher and the relative volume refrigerating capacity is smaller; comparative example 3, the GWP value is higher and the relative volume refrigerating capacity is smaller; comparative example 4, the GWP value was higher; comparative example 5, higher GWP value, larger temperature glide and smaller relative coefficient of performance; comparative example 6, higher GWP value and larger temperature glide; comparative example 7, higher GWP value; comparative example 8, slight burn;
in conclusion, in the preferable proportion range of the above design working conditions and the above theoretical calculation, the unit volume refrigerating capacity and the system performance coefficient of each refrigerant formula are smaller and incombustible than those of R134a, the temperature slip is lower, the GWP is obviously lower than that of R134a, and the refrigerant can be better substituted for R134 a.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (5)

1. A mixed refrigerant characterized by: comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane and 2,3,3, 3-tetrafluoropropene; the mixed refrigerant also comprises a fourth component, the fourth component is any one of pentafluoroethane and 1,1,1,2,3,3, 3-heptafluoropropane, and the sum of the molar percentage concentrations of the 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and the fourth component is 100%.
2. The mixed refrigerant according to claim 1, wherein: the mixed refrigerant comprises 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and 1,1,1,2,3,3, 3-heptafluoropropane, and the sum of the molar percentage concentrations of the 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and 1,1,1,2,3,3, 3-heptafluoropropane is 100%.
3. The mixed refrigerant according to claim 1, wherein: the molar composition of the 1,1,1, 2-tetrafluoroethane is 16-28%, the molar composition of the 1,1,2, 2-tetrafluoroethane is 4-20%, the molar composition of the 2,3,3, 3-tetrafluoropropene is 60-64%, and the molar composition of the 1,1,1,2,3,3, 3-heptafluoropropane is 4%.
4. The mixed refrigerant according to claim 1, wherein: the mixed refrigerant comprises 1,1,1, 2-tetrafluoro
Ethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and pentafluoroethane, wherein the sum of the molar percentage concentrations of 1,1,1, 2-tetrafluoroethane, 1,1,2, 2-tetrafluoroethane, 2,3,3, 3-tetrafluoropropene and pentafluoroethane is 100%.
5. The mixed refrigerant according to claim 4, wherein: the molar component of the 1,1,1, 2-tetrafluoroethane is 4-32%, the molar component of the 1,1,2, 2-tetrafluoroethane is 4-36%, the molar component of the 2,3,3, 3-tetrafluoropropene is 56-60%, and the molar component of the pentafluoroethane is 4%.
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