Abstract
Abstract In this article, in order to reduce the climate hazards caused by global warming, a new environmentally friendly mixed refrigerant, R1234yf/R125 (with a mass ratio of 95:5), is introduced. Alongside R1234yf, the article conducts theoretical research to assess the feasibility of substituting R134a in vapor compression systems. The results show that coefficient of performance (COP) and compressor discharge temperatures of R1234yf and R1234yf/R125 are ~5.5% and 11°C lower than those of R134a, respectively. The volumetric cooling capacity of R1234yf is on average 8% smaller than that of R134a. The volumetric cooling capacity of R1234yf/R125 is similar to that of R134a, making it highly suitable for direct charging. R1234yf/R125 is basically nonflammable, with a minimal temperature glide, ozone depletion potential of 0 and a global warming potential of 144. It adheres to F-gas regulations and serves as an outstanding replacement for R134a.
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