Patent ID: 8974688
Filing Date: 2015-03-10
Classification: C09K,F25B,F28D

Abstract:
1. A heat transfer composition comprising a refrigerant consisting essentially of: (a) from about 35% to about 55% by weight of HFC-134a; (b) from about 30% to less than 60% by weight of HFO-1234ze wherein said HFO-1234ze consists of trans-HFO-1234ze; and (c) from about 0% to about 30% by weight of HFO-1234yf, provided that the amount of HFO-1234ze and HFO-1234yf in the composition together is at least about 35% by weight and the resulting composition has a total GWP of not greater than about 700 when the GWP of HFC-134a is valued at 1430, and the composition is a Class A1 composition as determined in accordance with ASHRAE Standard 34-2007, including ANSI/ASHRI Addenda, with the weight percent being based on the total of the components (a)-(c) in the composition.