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Refrigeration system for supermarket applications significantly contributes to direct and indirect global warming. The aim of this analysis is to present a methodology of assessing such systems in ter...ms of refrigerants, machinery and operational protocol to minimize the total equivalent warming impact (TEWI). Air-cooled refrigeration system is analyzed for low temperature (LT) evaporation (–20°C) and medium temperature (MT) evaporation (0°C) with condensation at 40°C. The effects of suction superheat and subcooling have also been accounted for. Various refrigerants such as HFC 134a, HFC blend 410A, HFO 1234yf and CO2 are considered as working fluids for catering to a LT load of 50 kW and MT load of 250 kW. TEWI have been assessed and compared for these refrigerants and their combinations. A quantitative analysis of economic loss due to refrigerant leakage has also been performed.続きを見る
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