Difluoromethane, fluorinated ethane, and 1,3,3,3 heat transfer composition having a low gwp containing tetrafluoropropene

摘要

Heat transfer compositions, methods and use wherein the composition comprising: (a) from about 5 to about 20% by weight of HFC-32; (b) from about 70% to about 90% by weight of HFO-1234ze; and (c) from about 5% to less than about 20% by weight of HFC-152a and/or HFC-134a.