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Energy Performance of Eco-friendly R152a and R600a Refrigerants as Alternative to R134a in Vapour Compression Refrigeration System

Bukola Olalekan Bolaji, Zhongjie Huan, Francis Olusesi Borokinni

Abstract

In this study, the energy performance of eco-friendly refrigerants \n(R152a and R600a) was investigated theoretically as alternative to \nR134a in refrigeration system. The results showed that the vapour \npressure and specific volume of R152a are very close to those of \nR134a. R152a emerged as the most energy efficient with average Power \nPer Ton of Refrigeration (PPTR) of 10.6% less than that of R134a. \nR152a also exhibited higher Volumetric Refrigerating Capacity (VRC) \nand Coefficient of Performance (COP) than both R600a and R134a. The \naverage COPs obtained for R152a and R600a were 13.4% higher and \n5.4% lower than that of R134a, respectively. Generally, R152a performed \nbetter as R134a substitute in that it has the lowest PPTR, highest \nthermal conductivity, refrigerating effect, VRC and COP.

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Key concepts: Refrigerant, Vapor-compression refrigeration, Refrigeration, Environmentally friendly, Process engineering, Compression (physics), Environmental science, Energy (signal processing)