Environmentally friendly refrigerant compositions having low flammability and low GWP
AssigneeFluorotek, L.L.C.
InventorsDavid L. Couchot, Sankara N. Ramanan
Life of this patent
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Abstract
A refrigerant composition includes R-125 (pentafluoroethane), R-134a (1,1,1,2-tetrafluoroethane), R-32 (difluoromethane), R-227ea (1,1,1,2,3,3,3-heptafluoropropane), R-152a (1,1-difluoroethane), CO2 and R-1234ze (1,3,3,3-tetrafluoropropene). In one exemplary embodiment, the refrigerant includes 18.5-20.5 wt % R-125, about 9-11 wt % R-134a, about 20-22 wt % R-32, about 3-5 wt % R-227ea, about 2.5-4.5 wt % R-152a, about 1-3 wt % CO2 and about 39-41 wt % R-1234ze. Formulating with reclaimed material lowers the global warming potential to about 400 to about 750.
Claims20
A refrigerant composition, comprising:
- about 18.5-20.5 wt % pentafluoroethane;
- about 9-11 wt % 1,1,1,2-tetrafluoroethane;
- about 20-22 wt % difluoromethane;
- about 3-5% 1,1,1,2,3,3,3-heptafluoropropane;
- about 2.5-4.5 wt % 1,1-difluoroethane;
- about 1-3 wt % CO2;
- and
- about 39-41 wt % 1,3,3,3-tetrafluoropropene.
A refrigerant composition having low flammability, comprising:
- about 18.5-20.5 wt % pentafluoroethane;
- about 9-11 wt % 1,1,1,2-tetrafluoroethane;
- about 20-22 wt % difluoromethane;
- about 3-5% 1,1,1,2,3,3,3-heptafluoropropane;
- about 2.5-4.5 wt % 1,1-difluoroethane;
- about 1-3 wt % CO2;
- and
- about 39-41 wt % 1,3,3,3-tetrafluoropropene,
- wherein the refrigerant composition has a global warming potential of about 1000 to about 1200.
A refrigerant composition, comprising:
- about 19-21 wt % pentafluoroethane;
- about 7-9 wt % 1,1,1,2-tetrafluoroethane;
- about 21-23 wt % difluoromethane;
- about 3-5 wt % 1,1,1,2,3,3,3-heptafluoropropane;
- and
- about 38-40 wt % 1,3,3,3-tetrafluoropropene.
Dependencies are inferred from the claim text.