Environment-friendly refrigeration composition

Abstract

The invention discloses an environment-friendly refrigeration composition. The environment-friendly refrigeration composition is prepared from, by molar percent, 50-70% of fluoromethane and 30-50% of a second component selected from one or two or three of trans-1,3,3,3-tetrafluoropropene, 2,3,3,3-tetrafluoropropene and f-methyl methyl ether; the boiling point of the refrigeration composition is -50--75 DEG C, and the GWP value is smaller than or equal to 300. The refrigeration composition is low in GWP value, excellent in refrigeration performance, low in flammability, high in safety and suitable for replacing HFC-23 for refrigeration.

Description

technical field [0001] The invention relates to a refrigeration composition, in particular to an environment-friendly refrigeration composition. . Background technique [0002] -60~-80℃ low-temperature refrigeration system is widely used in medical, chemical, aerospace, aviation, military and other fields. In the vapor compression refrigeration cycle, when ordinary single-stage compression is used, problems such as a decrease in cooling capacity, an increase in energy consumption, and a decrease in energy efficiency ratio will occur as the pressure ratio increases. Generally, when the pressure ratio reaches 8 or more, It is necessary to use cascade refrigeration or automatic cascade refrigeration instead of ordinary single-stage compression to obtain low temperatures below -60°C. [0003] A cascade refrigeration system usually consists of two separate refrigeration systems, called a high-temperature stage and a low-temperature stage, respectively, and the high-temperature ...

AI Technical Summary

Problems solved by technology

[0006] The above-disclosed refrigeration mixtures have disadvantages such as high GWP value, strong flammability, low energy efficiency, or small volumetric refrigeration capacity, etc.