Heat transfer compositions, methods and systems

Patent metadata

Field	Value
Publication number	US-10208235-B2
Application number	US-201815963805-A
Country	US
Kind code	B2
Filing date	Apr 26, 2018
Priority date	Nov 16, 2007
Publication date	Feb 19, 2019
Grant date	Feb 19, 2019

Abstract

The present invention relates to a refrigerant composition, including difluoromethane (HFC-32), pentafluoroethane (HFC-125), and trifluoroiodomethane (CF 3 I) for use in a heat exchange system, including air conditioning and refrigeration applications and in particular aspects to the use of such compositions as a replacement of the refrigerant R-410A for heating and cooling applications and to retrofitting heat exchange systems, including systems designed for use with R-410A.

First claim

The invention claimed is:

1. A heat transfer composition comprising a refrigerant consisting of:
from 48% by weight to 51% by weight difluoromethane (HFC-32),
11.5%+/−1% by weight pentafluoroethane (HFC-125), and
from 36.5% by weight to 40.5% by weight trifluoroiodomethane (CF3I), wherein said refrigerant is non-flammable when tested in accordance with ASTM E681-2009 as required in ASHRAE Standard 34-2013 and described in Appendix B1 to ASHRAE Standard 34-2013.

2. The heat transfer composition of claim 1 wherein said CF3I is present in said refrigerant in an amount of about 38.5% by weight.

3. The heat transfer composition of claim 2 wherein said HFC-125 is present in said refrigerant in an amount of 11.5%+/−0.5% by weight.

4. The heat transfer composition of claim 3 wherein said HFC-32 is present in said refrigerant in an amount of about 50% by weight.

5. The heat transfer composition of claim 2 wherein said HFC-32 is present in said refrigerant in an amount of about 50% by weight.

6. The heat transfer composition of claim 1 wherein said HFC-32 is present in said refrigerant in an amount of about 50% by weight.

7. The heat transfer composition of claim 1 further comprising a polyol ester (POE) lubricant.

8. A method of cooling air in a heat transfer system having an evaporator, a condenser, a compressor and refrigerant in the system, the method comprising:
(i) condensing the refrigerant, wherein said refrigerant consists of:
from 48% by weight to 51% by weight difluoromethane (HFC-32),
11.5% by weight pentafluoroethane (HFC-125), and
from about 36.5% by weight to about 40.5% by weight trifluoroiodomethane (CF3I), and wherein said refrigerant is non-flammable when tested in accordance with ASTM E681-2009 as required in ASHRAE Standard 34-2013 and described in Appendix B1 to ASHRAE Standard 34-2013; and

ii) evaporating the refrigerant, wherein the evaporating comprises evaporating the refrigerant at a temperature of from about −40° C. to about −10° C.

9. The method of claim 8 wherein said CF3I is present in said refrigerant in an amount of about 38.5% by weight.

10. The method of claim 9 wherein said HFC-125 is present in said refrigerant in an amount of 11.5%+/−0.5% by weight.

11. The method of claim 10 wherein said HFC-32 is present in said refrigerant in an amount of about 50% by weight.

12. The method of claim 8 wherein said HFC-32 is present in said refrigerant in an amount of about 50% by weight.

13. The method of claim 12 wherein said HFC-32 is present in said refrigerant in an amount of about 50% by weight.

14. The method of claim 8 wherein said system further contains therein a polyol ester (POE) lubricant for said compressor.

15. The method of claim 8 wherein said system is a stationary air conditioning system or a chiller system.

16. A method of heating air in a heat transfer system having an evaporator, a condenser, a compressor and refrigerant in the system, the method comprising:
(i) condensing the refrigerant, wherein said refrigerant consists of:
from 48% by weight to 51% by weight difluoromethane (HFC-32),
about 11.5% by weight pentafluoroethane (HFC-125), and
from about 36.5% by weight to about 40.5% by weight trifluoroiodomethane (CF3I), and wherein said refrigerant is non-flammable when tested in accordance with ASTM E681-2009 as required in ASHRAE Standard 34-2013 and described in Appendix B1 to ASHRAE Standard 34-2013; and
ii) evaporating the refrigerant, wherein the evaporating comprises evaporating the refrigerant at a temperature of from about −20° C. to about 3° C.

17. The method of claim 16 wherein said system further contains polyol ester (POE) lubricant for said compressor.

18. The method of claim 17 wherein said HFC-125 is present in said refrigerant in an amount of 11.5%+/−0.5% by weight.

19. The method of claim 18 wherein said HFC-32 is present in said refrigerant in an amount of about 50% by weight.

20. The method of claim 17 wherein said HFC-32 is present in said refrigerant in an amount of about 50% by weight.

Assignees

• Honeywell Int Inc

Inventors

• Sethi Ankit
• Yana Motta Samuel F
• Pottker Gustavo
• Smith Gregory Laurence
• Vera Becerra Elizabet Del Carmen
• Zou Yang
• Close Joshua

Classifications

• C10M2211/0206

  used as base material · CPC title

• C10M171/008

  Lubricant compositions compatible with refrigerants · CPC title

• C10M111/02

  at least one of them being a non-macromolecular organic compound · CPC title

• C10M2203/024

  unsaturated · CPC title

• C10M2207/2835

  used as base material · CPC title