Low GWP heat transfer compositions containing difluoromethane, A Fluorinated ethane and 1,3,3,3-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.

主权项

1. A heat transfer composition comprising from 30% to 90% by weight trans-1,3,3,3-tetrafluoropropene R-1234ze(E), from 4 to 20% by weight difluoromethane R-32 and from 10 to 50% by weight 1,1,1,2-tetrafluoroethane (R-134a), wherein the composition comprises substantially no 3,3,3-trifluoropropene (1243zf).