Mixed refrigerant

Abstract

The invention discloses a mixed refrigerant with GWP value being lower than 150. The mixed refrigerant comprises the following components in percentage by mass: 52%-90% of 2,3,3,3-tetrafluoropropene (HFO-1234yf), 5%-30% of Trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)) and 5%-18% of F-methyl methyl (CF3OCH3 and HFE-143a). The mixed refrigerant does not damage atmospheric ozone layers, is low in greenhouse effect value, and excellent in environment-friendly performance; thermal performance of the mixed refrigerant is comparable with that of HFC-134a; drop-in substitution can be realized directly without change of any parts of an originally used HFC-134a system, the energy-efficiency ratio can be increased, the charging amount can be reduced, and the mixed refrigerant has the advantages of being low in substitution cost, resource-saving and energy-saving, and can be used as a long-term substitute of HFC-134a in an automobile air conditioner.

Description

technical field [0001] The invention relates to a mixed refrigerant, in particular to a refrigerant composition used in an automobile air-conditioning system which does not destroy the potential of atmospheric ozone and has extremely low greenhouse effect. Background technique [0002] 1,1,1,2-Tetrafluoroethane (HFC-134a), as a substitute for CFC-12, has been widely used for its excellent performance, but because of its high greenhouse effect value of 1430, it is " Kyoto Protocol "listed as one of the first high-GWP value refrigerants phased out. According to the requirements of the MAC Directive (2006 / 40 / EC) on emissions from automotive air-conditioning systems that the European Union has passed and came into effect in 2013, by the end of 2016, refrigerants with a GWP value greater than 150 must be phased out in proportion to the use of automotive air-conditioners. And from January 1, 2017, all automotive air conditioners will be prohibited from using refrigerants with a G...

AI Technical Summary

Problems solved by technology

[0005] The refrigerant compositions disclosed in the above-mentioned patents have high GWP values, strong flammability, large temperature glide, low energy efficiency, small volumetric refrigeration capacity, or cannot be directly charged and applied to HFC- 134a system and other shortcomings, so it is necessary to develop refrigerants that have better refrigeration performance, better compatibility with existing systems, and better environmental performance for automotive air conditioning

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