Heat transfer compositions and methods

Details Heat transfer compositions and methods Heat transfer compositions and methods

C - Chemistry, Metallurgy

09

K

C09K 5/04 (2006.01)

Patent

CA 2761418

Compositions, methods and systems which comprise or utilize a multi-component mixture 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 HFO- 1234ze, HFO- 1234yf and combinations of these; (d) from about 15% to about 35% by weight of HFC-134a; and optionally (e) up to about 10% by weight of CF3I and up to about 5% by weight of HFCO-1233ze, with the weight percent being based on the total of the components (a) - (e) in the composition.

La présente invention concerne des compositions, des procédés et des systèmes qui comprennent ou font intervenir un mélange multicomposant contenant : (a) environ 10 % à environ 35 % en poids de HFC-32 ; (b) environ 10 % à environ 35 % en poids de HFC-125 ; (c) environ 20 % à environ 50 % en poids de HFO-1234ze, HFO-1234yf et des combinaisons de ceux-ci ; (d) environ 15 % à environ 35 % en poids de HFC-134a ; et éventuellement, (e) jusqu'à environ 10 % en poids de CF3I et jusqu'à environ 5 % en poids de HFCO-1233ze, le pourcentage en poids étant rapporté au total des composants (a)-(e) dans la composition.

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