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    HIGH EFFICIENCY AIR CONDITIONING SYSTEMS AND METHODS
    5.
    发明申请
    HIGH EFFICIENCY AIR CONDITIONING SYSTEMS AND METHODS 审中-公开

    公开(公告)号：US20190264956A1

    公开(公告)日：2019-08-29

    申请号：US16410190

    申请日：2019-05-13

    申请人： HONEYWELL INTERNATIONAL INC.

    发明人： Michael Petersen ,  Samuel F. Yana Motta ,  Ankit Sethi ,  Elizabet del Carmen Vera Becerra

    IPC分类号： F25B1/053 ,  C09K5/04 ,  F25B45/00 ,  F25B1/10 ,  F25B40/00

    摘要： Disclosed are refrigeration systems of the type having a heat source to be cooled and a heat sink into which heat can be rejected, said system preferably having a capacity of from about 2 to about 30 tons and comprising: (a) a heat transfer composition comprising a refrigerant comprising at least about 80% by weight of trans1-chloro-3,3,3-trifluoropropene (HCFO-1233zd(E)) or at least about 80% by weight of trans1,3,3,3-tetrafluoropropene (HFO-1234ze(E)); (b) a centrifugal compressor having: (i) a refrigerant suction for receiving a relatively low-pressure refrigerant vapor at a pressure of from about 40 to about 350 kPa and (ii) a discharge for discharging a relatively high pressure refrigerant vapor at a pressure wherein the discharge:suction pressure ratio is at least about 2:1; (c) a condenser operating at temperature in the range of from about 10° C. to about 60° C.; (d) and expander for producing relatively cold low pressure refrigerant liquid; (e) a high efficiency evaporator, preferably a flooded evaporator, fluidly connected to said expander for receiving said low pressure refrigerant liquid from said expander and evaporating said low pressure refrigerant liquid by absorbing heat from said source to be cooled to produce a relatively low pressure refrigerant vapor at a pressure of from about 40 to about 350 kPa, said refrigerant vapor exiting from said evaporator preferably having no substantial superheat; (f) at least one heat exchanger fluidly connected between said evaporator and said refrigerant suction of said compressor.

    HEAT TRANSFER COMPOSITIONS AND METHODS
    9.
    发明申请
    HEAT TRANSFER COMPOSITIONS AND METHODS 有权

    公开(公告)号：US20210355356A1

    公开(公告)日：2021-11-18

    申请号：US17040467

    申请日：2019-03-15

    申请人： HONEYWELL INTERNATIONAL INC.

    发明人： Ankit Sethi ,  Samuel F. Yana Motta ,  Gustavo Pottker ,  Michael Petersen

    IPC分类号： C09K5/04 ,  F25B45/00

    摘要： Disclosed are methods of retrofitting heat transfer systems containing or designed to containing HFC-134a as the refrigerant comprising: removing at least a portion of said HFC-134a from said system; and introducing into said system a refrigerant comprising at least about 97.5% by weight of the following four components, with each compound being present in the following relative percentages:
    (a) from 2% to about 7% by weight of difluoromethane (HFC-32); (b) from 2% to about 7 by weight of pentafluoroethane (HFC-125); (c) from about 35% to about 50% by weight of 1,1,1,2-tetrafluoroethane (HFC-134a); and (d) from about 50% to about 55% by weight of trans-1,3,3,3-tetrafluoropropene (HFO-1234ze(E)).