Tetrafluoropropene-based azeotropic compositions
AssigneeArkema France
InventorWissam Rached
Life of this patent
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Abstract
Azeotropic compositions including between 74 and 81.5 wt.-% HFO-1324yf, between 6.5 and 10.5 wt.-% HFC-134a, and between 12 and 16 wt.-% HFC-152a, relative to the total weight of the composition, the azeotropic composition having a boiling point of between −40.00° C. and 70.00° C., at a pressure of between 0.5 and 21.0 bar abs (±0.5%). Also, the uses of the aforementioned compositions in heat transfer systems.
Claims9
An azeotropic composition comprising between 76% to 79% weight of HFO-1234yf, between 12% to 15% weight of HFC-152a, and between 7% to 9% weight of HFC-134a, in relation to a total weight of the azeotropic composition, said azeotropic composition having a boiling point between -40.00° C. and 70.00° C., at a pressure of between 0.5 and 21.0 bar abs (±0.5%), wherein the global warming potential of the azeotropic composition is at most 150.
A heat transfer system comprising a vapour compression circuit containing an azeotropic composition, said circuit containing an oil separator and a screw compressor,
- wherein the azeotropic composition comprises between 74 to 81.5% weight of HFO-1324yf, between 6.5 to 10.5% weight of HFC-134a, and between 12 to 16% weight of HFC-152a, in relation to a total weight of the azeotropic composition, said azeotropic composition having a boiling point between −40.00° C. and 70.00° C., at a pressure between 0.5 and 21.0 bar abs (±0.5%),
- wherein the global warming potential of the azeotropic composition is at most 150.
Dependencies are inferred from the claim text.