R-32 and R-134a as Refrigerants for Fisheries Cold Storage: An Energy Performance Analysis

Given the escalating global temperatures, air conditioning systems have become indispensable, particularly within the food industry where a cold storage system is imperative for preserving food freshness and extending its shelf life. As a result, the development of an efficient cold storage system is of utmost importance. The properties of a refrigerant significantly influence the performance of the refrigeration system, as well as its environmental impact measured by the Ozone Depletion Potential (ODP) and Global Warming Potential (GWP). This research paper aims to assess the energy efficiency of refrigeration systems that employ R-32 and R-134a in a fish cold storage facility. The findings from mathematical calculations indicate that R-32 necessitates greater energy input to achieve the desired temperature reduction, resulting in a lower Coefficient of Performance (COP) compared to R-134a. Nevertheless, R-32 exhibits a higher capacity for carrying energy per unit mass due to its elevated enthalpy. The critical temperature of R-32, 78.1°C, falls below the work cycle temperature post-compression, rendering it unsuitable for cold storage applications as it cannot revert to its original form and may cause compressor damage.