Environment-friendly mixed refrigerant

Abstract

The invention discloses an environment-friendly mixed refrigerant. The refrigerant comprises the following components, in percentages by mass: 1%-90% of a first component, 1%-90% of a second component, 1%-90% of a third component and 1%-97% of a fourth component, wherein the first component is trifluoroiodomethane, the second component is at least one selected from 1,1,1,2-tetrafluoroethane and pentafluoroethane, the third component is at least one selected from trans-1,3,3,3-tetrafluoropropene, 2,3,3,3-tetrafluoropropene and difluoromethane, and the fourth component is at least selected from1,1-difluoroethane, monofluoroethane, propylene, propane, dimethyl ether and isobutane. The GWP value of the mixed refrigerant provided by the invention is greatly reduced relative to R404A, the ODP is 0, and the environmental performance is better than that of the R404A.

Description

technical field [0001] The invention relates to a refrigeration working medium, in particular to an environment-friendly mixed refrigeration working medium. Background technique [0002] At present, with the global warming and the deterioration of the ecological environment in recent years, the international community has formulated a series of laws and regulations to limit the use of high global warming potential (GWP) refrigerants, and to replace high GWP refrigerants Higher requirements have been put forward, requiring new refrigerants to have zero ozone depletion potential (ODP) and the lowest possible GWP value. The Kigali Amendment to the Montreal Protocol adopted in 2016 has formulated a more stringent reduction plan for high-GWP refrigerants. As a contracting country, China will achieve the goal of 80% reduction (calculated by CO2 equivalent) in 2045. Therefore, it is imminent to research and develop environmentally friendly refrigerants with low GWP value. Due to ...

AI Technical Summary

Problems solved by technology

Therefore, it is imminent to research and develop environmentally friendly refrigerants with low GWP value. Due to the contradiction between refrigerant environmental protection characteristics, explosion characteristics and thermodynamic properties, pure refrigerants often cannot meet the current needs, and mixed refrigerants can balance the physical properties of refrigerants. characteristics, has received great attention, but has not yet found a more perfect refrigerant alternative

[0003] In the field of freezing and refrigeration, the commonly used refrigerants are R404A and R507A, but both of them have high GWP value (GWP value is as high as 4000). R455A, R457A and R459B, etc., although they meet the requirement that the GWP value is less than 150, they are all weakly flammable (A2L) mixed refrigerants, and the filling capacity cannot exceed 1.2KG, so they can only be used for small equipment such as refrigerators and freezers. It cannot be used in ordinary cold storage, refrigerated transport vehicles, refrigerated containers and other equipment

Although R448A and R449A are non-flammable refrigerants (A1 grade) as substitutes for R404A / R507A, their GWP is as high as 1300, and their refrigeration performance is lower than that of R404A.

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