An hfchc refrigerant mixture for automobile air conditioning systems

Abstract

R12 has been completely phased out and globally there is a newlinecontinuous search for alternatives The airconditioning and refrigeration newlinesector is forced to replace the refrigerants frequently in respect of newlineenvironmental concerns based on refrigerant emissions Many refrigerants newlinehave been reported as alternatives R134a has been accepted as the single newlinemajor refrigerant in the automobile industry and it has been used worldwide newlineR134a systems use Poly Alkaline Glycol PAG as the lubricant which is newlinesynthetic oil newlineMany refrigerants have been reported as alternatives to R12 these newlinecan be broadly classified as HFC and HC refrigerants These refrigerants newlinethough environment friendly have their own disadvantages HFCs are newlineimmiscible with mineral oil whereas HC refrigerants are flammable newlineConsidering the safety norms HC cannot be charged above the flammability newlinelimits HFC system use PAG oil as a lubricant newline newline