Heat transfer compositions, methods, and systems
AssigneeHoneywell International Inc.
InventorsAnkit Sethi, Samuel F. Yana Motta, Gustavo Pottker, Yang Zou, Elizabet del Carmen Vera Becerra, Gregory L. Smith
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Abstract
The present invention relates to a refrigerant composition, including trifluoroiodomethane (CF3I); 1,3,3,3-tetrafluoropropene (HFO-1234ze); difluoromethane (HFC-32), and pentafluoroethane (HFC-125) for use in a heat exchange system, including refrigeration applications and in particular aspects to the use of such compositions as a replacement of the refrigerant R-22 or R-404A for heating and cooling applications and to retrofitting heat exchange systems, including systems designed for use with R-22 or R-404A.
Claims20
A refrigerant comprising at least about 97% by weight of the following four compounds, with each compound being present in the following relative percentages:
- 36.8 to 72% by weight trifluoroiodomethane (CF3I);
- 2 to 36% by weight of tetrafluoropropene selected from trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E), 2,3,3,3-tetrafluoropropene (HFO-1234yf) and combinations of these;
- 15 to 31% by weight difluoromethane (HFC-32);
- and
- 1 to 4.5% by weight pentafluoroethane (HFC-125).
A method for transferring heat of the type comprising evaporating refrigerant liquid to produce a refrigerant vapor, compressing in a compressor at least a portion of the refrigerant vapor and condensing refrigerant vapor, said method comprising:
- (a) providing a refrigerant comprising at least about 97% by weight of the following four compounds, with each compound being present in the following relative percentages:
- 36.8 to 72% by weight trifluoroiodomethane (CF3I);
- 2 to 36% by weight of tetrafluoropropene selected from trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E), 2,3,3,3-tetrafluoropropene (HFO-1234yf) and combinations of these;
- 15 to 31% by weight difluoromethane (HFC-32);
- and
- 1 to 4.5% by weight pentafluoroethane (HFC-125);
- (b) evaporating said refrigerant at a temperature of from about −40° C. to about +10° C.
A heat transfer system the type comprising an evaporator, a compressor, and a refrigerant in the system, said system comprising:
- (a) said refrigerant comprising at least about 97% by weight of the following four compounds, with each compound being present in the following relative percentages:
- 36.8 to 72% by weight trifluoroiodomethane (CF3I);
- 2 to 36% by weight of tetrafluoropropene selected from trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E), 2,3,3,3-tetrafluoropropene (HFO-1234yf) and combinations of these;
- 15 to 31% by weight difluoromethane (HFC-32);
- and
- 1 to 4.5% by weight pentafluoroethane (HFC-125);
- and
- (b) a sequestration material comprising:
- i. activated alumina, and
- ii. a zeolite molecular sieve comprising copper, silver, lead or a combination thereof, and
- iii. an anion exchange resin, and
- iv. a moisture-removing material, preferably a moisture-removing molecular sieve.
Dependencies are inferred from the claim text.