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In this paper mathematical models were developed using design of experiments   technique for the performance prediction of refrigeration system parameters   such as refrigerating capacity, power consumption and coefficient of   performance. The models developed were checked for their adequacy using   F-test. The performances of vapour compression refrigeration system with   different refrigerants R12, R134a and R290/R600a were compared. The   R290/R600a mixture showed 10.7-23.6% higher coefficient of performance than   that with R12 and R134a and it was found that the hydrocarbon mixture with   68% propane and 32% iso-butane could be used as a substitute for R12 and   R134a

Experimental investigations with eco-friendly refrigerants using design of experiments technique-mathematical modeling and experimental validation