HEAT TRANSFER METHODS, SYSTEMS AND COMPOSITIONS

    公开(公告)号:US20210355358A1

    公开(公告)日:2021-11-18

    申请号:US17322945

    申请日:2021-05-18

    Abstract: Disclosed are methods for providing heating and/or cooling of the type comprising evaporating refrigerant liquid and condensing refrigerant vapor in a plurality of repeating cycles, where the method comprises (a) providing the refrigerant comprising at least about 5% by weight of a lower alkyl iodofluorocarbon; and (b) exposing at least a portion of said refrigerant in at least a portion of said plurality of said cycles to a sequestration material comprising: i) copper or a copper alloy; ii) a molecular sieve (preferably a zeolite), comprising copper, silver, lead or a combination thereof; iii) an anion exchange resin, and iv) a combination of two or more of these, wherein said exposing temperature is preferably above about 20 C.

    HEAT TRANSFER COMPOSITIONS, METHODS, AND SYSTEMS

    公开(公告)号:US20230055718A1

    公开(公告)日:2023-02-23

    申请号:US17872434

    申请日:2022-07-25

    Abstract: The present invention relates to a refrigerant composition comprising at least about 98.5% by weight of the following three compounds, with each compound being present in the following relative percentages: 33.0% to 45% by weight difluoromethane (HFC-32);
    48.5% to 67.0% by weight of 2,3,3,3-tetrafluoropropene (HFO-1234yf); and
    1.0% to 6.0% by weight fluoroethane (HFC-161), and to the use of the refrigerant in a heat exchange system, including air conditioning, refrigeration applications and heat pump applications and to the use of such compositions as a replacement of the refrigerant R-410A or R-32 or R-454B for heating and cooling applications.

    HEAT TRANSFER METHODS, SYSTEMS AND COMPOSITIONS

    公开(公告)号:US20190085224A1

    公开(公告)日:2019-03-21

    申请号:US16135962

    申请日:2018-09-19

    Abstract: Disclosed are methods for providing heating and/or cooling of the type comprising evaporating refrigerant liquid and condensing refrigerant vapor in a plurality of repeating cycles, where the method comprises (a) providing the refrigerant comprising at least about 5% by weight of a lower alkyl iodofluorocarbon; and (b) exposing at least a portion of said refrigerant in at least a portion of said plurality of said cycles to a sequestration material comprising: i) copper or a copper alloy; ii) a molecular sieve (preferably a zeolite), comprising copper, silver, lead or a combination thereof; iii) an anion exchange resin, and iv) a combination of two or more of these, wherein said exposing temperature is preferably above about 20 C.

    Heat transfer methods, systems and compositions

    公开(公告)号:US11008494B2

    公开(公告)日:2021-05-18

    申请号:US16135962

    申请日:2018-09-19

    Abstract: Disclosed are methods for providing heating and/or cooling of the type comprising evaporating refrigerant liquid and condensing refrigerant vapor in a plurality of repeating cycles, where the method comprises (a) providing the refrigerant comprising at least about 5% by weight of a lower alkyl iodofluorocarbon; and (b) exposing at least a portion of said refrigerant in at least a portion of said plurality of said cycles to a sequestration material comprising: i) copper or a copper alloy; ii) a molecular sieve (preferably a zeolite), comprising copper, silver, lead or a combination thereof; iii) an anion exchange resin, and iv) a combination of two or more of these, wherein said exposing temperature is preferably above about 20 C.

    NON-FLAMMABLE REFRIGERANTS WITH LOW GWP AND SECONDARY REFRIGERANT SYSTEMS INCLUDING SUCH REFRIGERANTS

    公开(公告)号:US20250067483A1

    公开(公告)日:2025-02-27

    申请号:US18814488

    申请日:2024-08-24

    Abstract: Non-flammable refrigerants with low GWP and secondary refrigerant systems including such refrigerants are provided. The refrigeration system may contain a high temperature refrigerant circuit with a first refrigerant and a low temperature refrigerant circuit with a second refrigerant, wherein the second refrigerant comprises a blend of R1234ze(Z), R1234ze(E), R1336mzz(E) and optionally R227ea, or a blend of R1234ze(Z) R1234ze(E) R1224yd(Z), and optionally R(227ea). The refrigerant fluids may have one of the following characteristics: (i) a global warming potential (GWP) of less than 150; (ii) an evaporator glide of less than 5.5° C.; (iii) non-flammability according to ASHRAE Standard 34; and/or (iv) a boiling point of less than 6° C.

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