Heat transfer compositions, methods, and systems
AssigneeSolstice Advanced Materials US, Inc.
InventorsSamuel F. Yana Motta, Ankit Sethi, Yang Zou
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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.
Claims17
A refrigerant consisting of the following three compounds, with each compound being present in the following relative percentages:
- 39% to 45% by weight difluoromethane (HFC-32),
- 1% to 4% by weight pentafluoroethane (HFC-125), and
- 51% to 57% by weight trifluoroiodomethane (CF3I), wherein the refrigerant is non-flammable.
A method of cooling in a heat transfer system comprising an evaporator, a condenser and a compressor, the process comprising the steps of:
- i) condensing a refrigerant consisting of the following three compounds, with each compound being present in the following relative percentages:
- 39% to 45% by weight difluoromethane (HFC-32),
- 1% to 4% by weight pentafluoroethane (HFC-125), and
- 51% to 57% by weight trifluoroiodomethane (CF3I) and
- ii) evaporating said refrigerant in the vicinity of the body or article to be cooled;
- wherein the temperature of the refrigerant in the evaporator is in the range of from about −40° C. to about 10° C.
A method of retrofitting an existing heat transfer system that contains R-410A refrigerant comprising:
- (a) removing at least a portion of said R-410A refrigerant from the system;
- and
- (b) introducing into the heat transfer system a refrigerant consisting of the following three compounds, with each compound being present in the following relative percentages:
- a. 39% to 45% by weight difluoromethane (HFC-32),
- b. 1% to 4% by weight pentafluoroethane (HFC-125), and
- c. 51% to 57% by weight trifluoroiodomethane (CF3I).
Dependencies are inferred from the claim text.