In this paper, energy and exergy analyses and performance comparison of R22 and its alternatives, R407C and R410A, in a vapour compression refrigeration system (VCRS) have been presented. For this aim, detailed first law (energy) and second law (exergy) analysis of these three refrigerants have been performed. Analyses have been performed for different evaporator (range of -40°C to 0°C with 5°C intervals), condenser (range of 40°C to 55°C with 5°C intervals), subcooling/superheating (range of 0°C to 10°C with 2°C intervals) and dead state temperatures (range of 20°C to 30°C with 5°C intervals). It is observed from results that R407C is a better alternate to R22 than R410A. The worst component of VCRS observed from the analyses is condenser.
Keywords: energy analysis, exergy analysis, vapour compression refrigeration, R22, R407C, R410A, performance evaluation, thermodynamics