Heat transfer compositions
First Claim
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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).
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Abstract
The invention provides a heat transfer composition comprising R-1234ze(E), R-32 and 1,1,1,2-tetrafluoroethane (R-134a).
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54 Claims
- 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).
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26. A heat transfer device according to claim which is selected from group consisting of automotive air conditioning systems, residential air conditioning systems, commercial air conditioning systems, residential refrigerator systems, residential freezer systems, commercial refrigerator systems, commercial freezer systems, chiller air conditioning systems, chiller refrigeration systems, and commercial or residential heat pump systems.
Specification