Ternary environment-friendly mixed refrigerant, preparation method thereof and refrigerating system

Abstract

The invention 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 refrigerating system. The ternary environment-friendly mixed refrigerant comprises 1, 1-difluoroethane, 2, 3, 3, 3-tetrafluoropropene and trifluoroiodomethane, the GWP value of the ternary environment-friendly mixed refrigerant is smaller than 150, and the ODP value of the ternary environment-friendly mixed refrigerant is 0. The ternary environment-friendly mixed refrigerant is preparedfrom the following components in percentage by mole: 40-80 percent of 1, 1-difluoroethane, 4-64 percent of 2, 3, 3, 3-tetrafluoropropene and 4-52 percent of trifluoroiodomethane. The preparation method of the ternary environment-friendly mixed refrigerant comprises the following steps: mixing and stirring the components of the ternary environment-friendly mixed refrigerant at room temperature in aliquid phase state to obtain the ternary environment-friendly mixed refrigerant. The ternary environment-friendly mixing system provided by the invention has the environment-friendly characteristic of low GWP, the refrigerating capacity per unit volume and the system performance coefficient are close to those of R152a, the combustibility is greatly improved, and an R152a refrigerant can be well replaced.

Description

technical field [0001] This application relates to the technical field of refrigerants, in particular, to a ternary environmentally friendly mixed refrigerant, a preparation method of the ternary environmentally friendly mixed refrigerant and a refrigeration system. Background technique [0002] In order to reduce the greenhouse effect, the parties to the Montreal Protocol reached the "Kigali Amendment" in October 2016, which included 18 hydrofluorocarbons (HFCs) in the controlled list, and formulated the regulations for developing countries and developed countries respectively. Regarding the HFCs phase-out plan, according to the HFCs phase-out plan, different countries or regions are actively formulating relevant regulations, and environmentally friendly refrigerants with a global warming potential (GWP) below 150 are likely to become the final refrigerants. 1,1-difluoroethane (R152a) has a GWP of 138 and is economical. It is an optional refrigerant for automotive air condi...

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Problems solved by technology

[0003] In order to solve the technical problems of poor environmental performance and flammability of R152a in the prior art, the primary purpose of the present invention is to propose an environmentally friendly mixed refrigerant, which has many advantages in terms of environmental protection, safety, physical properties, performance and economical efficiency of the refrigerant. Carefully screened in two dimensions to form an alternative refrigerant with lower GWP, higher safety and comparable thermodynamic performance compared with R152a, and proposed the preparation method of this environmentally friendly mixed refrigerant and the refrigeration system using this refrigerant

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