CN-121975493-A - R134a substituted refrigerant, preparation method and application thereof

Abstract

The invention belongs to the technical field of refrigerants, and particularly relates to a substitute refrigerant of R134a, and a preparation method and application thereof. The alternative refrigerant for R134a comprises 1-5 parts by weight of fluoroethane, 5-15 parts by weight of ‌, 1-difluoroethane ‌, and 80-94 parts by weight of hexafluoropropene. As a substitute refrigerant for R134a, the present invention has advantages of more environmental protection and safer as a whole.

Inventors

• LIU YE
• LIU JINGJING
• ZHANG LI

Assignees

• 湖北瑞能华辉能源管理有限公司
• 西安交通大学

Dates

Publication Date

20260505

Application Date

20260127

Claims (10)

1. 1. A substitute refrigerant for R134a is characterized by comprising, by weight, 1-5 parts of fluoroethane, 5-15 parts of ‌, 1-difluoroethane ‌ and 80-94 parts of hexafluoropropene.
2. 2. The refrigerant substitute for R134a according to claim 1, comprising 1 to 2 parts by weight of fluoroethane, 10 to 12 parts by weight of ‌, 1-difluoroethane ‌,86 to 89 parts by weight of hexafluoropropene.
3. 3. The refrigerant substitute for R134a according to claim 1, comprising 1 to 2 parts by weight of fluoroethane, 13 to 15 parts by weight of ‌, 1-difluoroethane ‌,83 to 86 parts by weight of hexafluoropropene.
4. 4. The refrigerant substitute for R134a according to claim 1, comprising 3 to 5 parts by weight of fluoroethane, 10 to 12 parts by weight of ‌, 1-difluoroethane ‌,83 to 87 parts by weight of hexafluoropropene.
5. 5. The refrigerant substitute for R134a according to claim 1, comprising 3 to 5 parts by weight of fluoroethane, 13 to 15 parts by weight of ‌, 1-difluoroethane ‌, and 80 to 84 parts by weight of hexafluoropropene.
6. 6. The refrigerant substitute for R134a according to claim 1, comprising 1 part by weight of fluoroethane, 13 parts by weight of ‌, 1-difluoroethane ‌,86 parts by weight of hexafluoropropene.
7. 7. The refrigerant substitute for R134a according to claim 1, comprising 3 parts by weight of fluoroethane, 14 parts by weight of ‌, 1-difluoroethane ‌,83 parts by weight of hexafluoropropene.
8. 8. The refrigerant substitute for R134a according to claim 1, comprising 5 parts by weight of fluoroethane, 5 parts by weight of ‌, 1-difluoroethane ‌, and 90 parts by weight of hexafluoropropene.
9. 9. A method for preparing a refrigerant substitute for R134a according to any one of claims 1 to 8, comprising the steps of injecting fluoroethane, 1-difluoroethane and hexafluoropropylene in a gas phase or liquid phase at room temperature into a pressure-resistant container, mixing uniformly in a liquid phase state by a physical mixing method, and standing to obtain the refrigerant.
10. 10. Use of a replacement refrigerant of R134a according to any one of claims 1 to 8, characterized in that: the air cooling system is used for replacing R134a refrigerant in an air cooling system; or used for replacing R134a refrigerant in a water cooling system; or used for replacing R134a working medium in the heat pump.

Description

R134a substituted refrigerant, preparation method and application thereof Technical Field The invention belongs to the technical field of refrigerants, and particularly relates to a substitute refrigerant of R134a, and a preparation method and application thereof. Background The R134a refrigerant is an HFC refrigerant widely used in air conditioning and heat pump systems, and its component is tetrafluoroethane. Although R134a has excellent refrigerating performance, its GWP value is high (about 1430). In addition, R32 alone has low GWP (about 675), but has light flammability (A2L safety level) and high exhaust gas temperature, R152a alone has high flammability (A2 safety level) and poor refrigerating efficiency, and R1216 (hexafluoropropylene) alone has very low GWP (< 1), but has large difference in thermophysical properties from R134a and poor system compatibility. The existing substitutes such as R290, R1234yf, R410A and the like have the problems of flammability, increase in GWP, obvious reduction of refrigerating performance and the like although the existing substitutes are improved in GWP or safety. Accordingly, the development of an alternative refrigerant that is low GWP, high performance, safe, and compatible with the R134a system is an urgent need in the air conditioning industry. The invention aims to provide a novel mixed refrigerant, the GWP value of which is significantly lower than that of R134a, and meanwhile, similar thermodynamic performance and operation characteristics are maintained, and the mixed refrigerant is specially optimized for a refrigeration system. Disclosure of Invention In order to solve the defects in the prior art, the invention provides an R134a substituted refrigerant, and a preparation method and application thereof. As a substitute refrigerant for R134a, the present invention has advantages of more environmental protection and safer as a whole. The technical scheme provided by the invention is as follows: A substitute refrigerant for R134a comprises 1-5 parts by weight of fluoroethane (R161, C 2H5 F), 5-15 parts by weight of ‌, 1-difluoroethane ‌ ‌ (R152 a, CH 3CHF2) and 80-94 parts by weight of hexafluoropropene (R1216, C 3F6). Based on the technical scheme: Having an ODP of zero, a GWP value well below the value of R134a (1430), and preferably a ratio mixture having a GWP value of less than 30 or even lower, has significant environmental advantages as a replacement refrigerant for R134 a; The refrigerant provided by the invention has the advantages of higher safety by adding R1216 to inhibit the combustibility. Preferably, the R134a substitute refrigerant comprises 1-2 parts by weight of fluoroethane, 10-12 parts by weight of ‌, 1-difluoroethane ‌ and 86-89 parts by weight of hexafluoropropene. Preferably, the R134a substitute refrigerant comprises 1-2 parts by weight of fluoroethane, 13-15 parts by weight of ‌, 1-difluoroethane ‌ and 83-86 parts by weight of hexafluoropropene. Preferably, the R134a substitute refrigerant comprises 3-5 parts by weight of fluoroethane, 10-12 parts by weight of ‌, 1-difluoroethane ‌ and 83-87 parts by weight of hexafluoropropene. Preferably, the R134a substitute refrigerant comprises 3-5 parts by weight of fluoroethane, 13-15 parts by weight of ‌, 1-difluoroethane ‌ and 80-84 parts by weight of hexafluoropropene. More preferably, the replacement refrigerant of R134a comprises 1 part by weight of fluoroethane, 13 parts by weight of ‌, 1-difluoroethane ‌ and 86 parts by weight of hexafluoropropene. More preferably, the replacement refrigerant for R134a comprises 3 parts by weight of fluoroethane, 14 parts by weight of 1, 1-difluoroethane ‌ and 83 parts by weight of hexafluoropropene. More preferably, the substitute refrigerant of R134a comprises 5 parts by weight of fluoroethane, 5 parts by weight of 1, 1-difluoroethane ‌ parts by weight of hexafluoropropylene. Specifically, the substituted refrigerant of R134a is any combination of the following various parts: the parts of fluoroethane are 1, 2, 3, 4 and 5; The parts ‌,6, 7, 8, 9, 10, 11, 12, 13, 14, 15 of 1, 1-difluoroethane; The parts of hexafluoropropylene are 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94. The invention also provides a preparation method of the R134a substitution refrigerant, which comprises the following steps of injecting gas-phase or liquid-phase fluoroethane, 1-difluoroethane and hexafluoropropylene into a pressure-resistant container at normal temperature according to the weight part ratio, uniformly mixing in a liquid-phase state by adopting a physical mixing method, and standing to obtain the refrigerant. The invention also provides application of the R134a refrigerant substitute, which is used for substituting R134a refrigerant in an air cooling system, or R134a refrigerant in a water cooling system, or R134a working medium in a heat pump. The beneficial effects of the invention are as follows: 1) The sliding temperature of the refrigerant is e