heat transfer composition, method for replacing a heat transfer fluid contained in the heat transfer system, and heat transfer system

摘要

heat transfer composition, method for replacing a heat transfer fluid contained in the heat transfer system, and heat transfer system compositions, methods and systems, that contain or use a mixture of multi components, comprising: (a) from about 10% to about 35% by weight of hfc-32; (b) from about 10% to about 35% by weight of hfc-125; (c) from about 20% to about 50% by weight of hf0-1234ze,hf0-1234yf and combinations thereof; (d) from about 15% to about 35% by weight of hfc-134a; and optionally (e) up to about 10 wt% of cf31 and up to about 5 wt% of cf12-1233ze,with the percentage by weight based on the total of the components (a) - (e) in the composition.