Methods of replacing heat transfer fluids
View Patent ↗Various uses of tetrafluoropropenes, particularly (HFO-1234) in a variety of applications, including refrigeration equipment, are disclosed. These materials are generally useful as refrigerants for heating and cooling, as blowing agents, as aerosol propellants, as solvent composition, and as fire extinguishing and suppressing agents.
1. A method of replacing an existing heat transfer fluid contained in an existing heat transfer system comprising replacing at least a portion of said existing heat transfer fluid with a heat transfer composition comprising HFO-1234yf, wherein said existing heat transfer fluid comprises HFC-134a.
2. The method of claim 1 wherein said heat transfer composition comprising at least one fluoroalkene of Formula I has a heat transfer capacity not substantially greater than the heat transfer capacity of said existing refrigerant.
3. The method of claim 1 wherein said heat transfer composition comprising at least one fluoroalkene of Formula I has a GWP not substantially greater than the GWP of said existing refrigerant.
4. The method of claim 1 wherein said existing heat transfer system comprises a refrigeration system.
5. The method of claim 1 wherein said existing heat transfer system comprises a vapor compression refrigeration system.
6. The method of claim 1 wherein said replacing step is not associated with any substantial modification of said existing heat transfer system.
7. The method of claim 1 wherein said existing heat transfer system comprises a freezer system.
8. The method of claim 1 wherein said existing heat transfer system is an automotive AC system.
9. The method of claim 1 wherein said existing heat transfer system is a commercial air conditioning system.
10. The method of claim 1 wherein said existing heat transfer system is a commercial refrigeration system.
11. The method of claim 10 wherein said heat transfer composition of said replacing step comprises from about 5% by weight to about 95% by weight of said HFO-1234yf.
12. The method of claim 11 wherein said heat transfer composition of said replacing step has a GWP of not greater than about 1000.
13. The method of claim 12 wherein said heat transfer composition of said replacing step is non-flammable.
14. The method of claim 11 wherein said heat transfer composition of said replacing step is non-flammable.
15. The method of claim 10 wherein said heat transfer composition of said replacing step has a GWP of not greater than about 1000.
16. The method of claim 15 wherein said heat transfer composition of said replacing step is non-flammable.
17. The method of claim 10 wherein said heat transfer composition of said replacing step is non-flammable.
18. The method of claim 1 wherein said heat transfer composition of said replacing step comprises from about 5% by weight to about 95% by weight of said HFO-1234yf.
19. The method of claim 18 wherein said heat transfer composition of said replacing step has a GWP of not greater than about 1000.
20. The method of claim 19 wherein said heat transfer composition of said replacing step is non-flammable.
21. The method of claim 18 wherein said heat transfer composition of said replacing step is non-flammable.
22. The method of claim 1 wherein said heat transfer composition of said replacing step has a GWP of not greater than about 1000.
23. The method of claim 22 wherein said heat transfer composition of said replacing step is non-flammable.
24. The method of claim 1 wherein said heat transfer composition of said replacing step is non-flammable.