Heat transfer compositions, methods and systems
AssigneeHoneywell International Inc.
InventorsAnkit Sethi, Samuel F. Yana Motta, Gustavo Pottker, Gregory Laurence Smith, Elizabet del Carmen Vera Becerra, Yang Zou, Joshua Close
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Abstract
The present invention relates to a refrigerant composition, including difluoromethane (HFC-32), pentafluoroethane (HFC-125), and trifluoroiodomethane (CF3I) 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.
Claims20
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.
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.
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.
Dependencies are inferred from the claim text.