Sustainability of Automobile Air- Conditioning System Using Refrigerant R۱۲۳۴yf Instead of R۱۳۴a

Air conditioning refrigerant R۱۳۴a has value of global warming potential (GWP) ۱۳۰۰, which is much higher than MAC Directive (GWP below ۱۵۰) passed in July ۲۰۰۶. This prompted a search for alternative refrigerant with GWP value less than ۱۵۰. R۱۲۳۴yf is a new refrigerant which has lower GWP value of ۴. Effect of blower speed has been compared and flammability issue of R۱۲۳۴yf has been addressed. Cooling time and relative humidity of car air -conditioning system using refrigerant R۱۳۴a and R۱۲۳۴yf has also been discussed. The paper discusses various aspects for the replacement of R۱۳۴a and provides a long term sustainable substitute of presently used refrigerant R۱۳۴a in automobile air-conditioning.