Abstract
With the objective of choosing the best refrigerant for a given application, this study examines the performance of R-290, R-600, and R-717 in two-stage vapor compression refrigeration systems. The systems consist of compressor cycles that achieve optimal interstage pressure in both low- and high pressure stages. Four factors were used to analyze the ecologically friendly refrigerants R-290, R-600, and R-717 in two-stage vapor compression cascade refrigeration systems. Using engineering equation solver software, the impact of changing the temperatures for evaporating, condensing, superheating, and subcooling as operational parameters on the coefficient of performance (COP) of the set-up apparatus was examined. The results demonstrated that for all three refrigerants taken into consideration, system COP dropped as the evaporation temperature declined from 0 oC to -50 oC. R-600 had a minimum COP value of 4.1 at the exact same temperature as R-717, which had a maximum value of 7.6 at the evaporation temperature of 0oC. All three refrigerants' coefficients of performance (COP) rose when superheating and subcooling temperatures rose, but condensing temperature increases resulted in a decline. The study found that the COP of the refrigeration systems under consideration is significantly impacted by the four operational factors that were taken into account. Manufacturers would find the data useful in choosing the right refrigerant to provide the anticipated freezing needs.