Fluorinated alkene refrigerant compositions
AssigneeHoneywell International Inc.
InventorsRaymond H. Thomas, Rajiv R. Singh
Life of this patent
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Abstract
Liquid compositions for use in compression refrigeration, air-conditioning and heat pump systems in which a fluoroalkene containing from 3 to 4 carbon atoms and at least 1 but no more than 2 double bonds is combined with an effective amount to provide lubrication of an essentially miscible organic lubricant comprised of carbon, hydrogen and oxygen and having a ratio of oxygen to carbon effective to provide a degree of miscibility with said fluoroalkene so that when up to five weight percent of lubricant is added to said fluoroalkene the refrigerant has one liquid phase at at least one temperature between −40 and +70° C. Methods for producing refrigeration and heating with the fluoroalkenes, alone or in combination with the disclosed lubricants, are also disclosed.
Claims16
A liquid composition for use in compression refrigeration, air-conditioning and/or heat pump systems consisting essentially of:
- (A) refrigerant consisting essentially of 1,3,3,3-tetrafluoropropene (HFO-1234ze), wherein said HFO-1234ze consists of trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze);
- and
- (B) from about 1% up to about 50% by weight of polyol ester lubricant having a viscosity of from about 30 to about 200 centistokes at about 37° C., wherein said composition has substantially one liquid phase at least over the range of temperatures from about −50° C. to about +70° C. when measured at each of the lubricant concentrations of 5%, 20% and 50% by weight.
A method for producing refrigeration in a refrigeration system comprising a compressor, an evaporator and a condenser, and a heat transfer composition consisting essentially of 1,3,3,3-tetrafluoropropene (HFO-1234ze), wherein said HFO-1234ze consists of trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze), and from about 1% up to about 50% by weight of polyol ester lubricant having a viscosity of from about 30 to about 200 centistokes at about 37° C. contained in said system, said method comprising condensing in said condenser said transHFO-1234ze, and thereafter evaporating in said evaporator said transHFO-1234ze in the vicinity of a body to be cooled, wherein said body to be cooled comprises air and said refrigeration system is selected from the group consisting of air conditioners, electric refrigerators, chillers, transport refrigeration systems, and commercial refrigeration systems and wherein said heat transfer composition has substantially one liquid phase at least over the range of temperatures from about −50° C. to about and +70° C. when measured at each of the lubricant concentrations of 5%, 20% and 50% by weight.
A method for producing refrigeration in a refrigeration system comprising a compressor and an evaporator, said method comprising condensing a refrigerant composition consisting essentially of 1,3,3,3-tetrafluoropropene (HFO-1234ze), wherein said HFO-1234ze consists of trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze), and from about 1% up to about 50% by weight of polyol ester lubricant having a viscosity of from about 30 to about 200 centistokes at about 37° C., and thereafter evaporating in said evaporator said refrigerant composition in the vicinity of a body to be cooled, wherein said refrigeration system comprises a chiller refrigeration systems, wherein said heat transfer composition has substantially one liquid phase at least over the range of temperatures from about −50° C. to about and +70° C. when measured at each of the lubricant concentrations of 5%, 20% and 50% by weight.
A refrigeration system comprising:
- (a) a refrigerant composition comprising (i) a refrigerant consisting essentially of 1,3,3,3-tetrafluoropropene (HFO-1234ze), wherein said HFO-1234ze consists of trans-1,3,3,3-tetrafluoropropene (transHFO-1234ze);
- and (ii) and from about 1% up to about 50% by weight of polyol ester lubricant having a viscosity of from about 30 to about 200 centistokes at about 37° C., wherein said heat transfer composition has one liquid phase at least over the range of temperatures from about −50° C. to about and +70° C. when measured at each of the lubricant concentrations of 5%, 20% and 50% by weight;
- (b) a compressor for compressing at least said transHFO-1234ze:
- and
- (c) a condenser for condensing at least said transHFO-1234ze.
Dependencies are inferred from the claim text.