| abstract |
Disclosed are refrigerant compositions comprising the following components, as expressed in weight percent, and such that the total adds up to 100%, including any additives.n 7.0-9.0% wt. R32 [difluoromethane, CH 2 F 2 , having a normal boiling point of −51.7° C.]; 39.0-50.0% wt. R125 [pentafluoroethane, CF 3 CHF 2 , having a normal boiling point of −48.5° C.]; 39.0-50.0% wt R134a [1,1,1,2 tetrafluoroethane, CF 3 CHF 2 , normal boiling point of −26.1° C.]; 1.9 to 2.5% wt hydrocarbon, which consists essentially of 1.5-1.8% wt R600 [n-butane, CH 3 CH 2 CH 2 CH 3 , normal boiling point of −0.5° C.], andn n0.4-0.7% wt R601a [isopentane, ((CH 3 ) 2 CHCH 2 CH 3 , having normal boiling point of +27.8° C.] or R601 [n-pentane (CH 3 CH 2 CH 2 CH 2 CH 3 , having a normal boiling point of +36° C.)].n nn Further disclosed are refrigerators, freezers, air conditioners, water chillers, and heat pumps using the compositions described herein as at least one of the heat transfer compositions in the equipment. |