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US 8,033,120 B2Granted
Compositions and methods containing fluorine substituted olefins
AssigneeHoneywell International Inc.
InventorsRajiv R. Singh, Hang T. Pham, David P. Wilson, Raymond H. Thomas, Ian Shankland
Life of this patent
Estimating the term…
Abstract
The use of pentafluoropropene (HFO-1225) and tetrafluoropropene (HFO-1234) in refrigeration equipment is disclosed. These materials are generally useful as refrigerants for heating and cooling, as blowing agents, as aerosol propellants, as solvent composition, and as fire extinguishing and suppressing agents.
Claims21
A method of cooling air comprising:
- (a) providing a heat transfer fluid comprising at least one lubricant and a refrigerant comprising a fluoroalkene of Formula I:
- XCFzRz-3 (I)
- where X is a C2 or a C3 unsaturated, substituted, alkyl radical, each substituent and each R is independently F, or H, and z is 1 to 3, provided that (i) said fluoroalkene of Formula I has at least four fluorine substituents has a terminal unsaturated carbon atom and has at least one H on said unsaturated terminal carbon, (ii) said lubricant and said refrigerant have one liquid phase at least one temperature between about −50° C. and +70° C. measured at 5% by weight of lubricant based on the weight of the refrigerant and lubricant, and (iii) said refrigerant has a Global Warming Potential (GWP) of not greater than about 75;
- and
- (b) cooling said air by vaporizing said refrigerant by causing heat to be transferred from the air being cooled to said heat transfer fluid.
2 more elements
A heat transfer method for cooling air comprising:
- (a) providing a heat transfer composition comprising at least one lubricant and a refrigerant comprising at least one fluoroalkene of Formula I:
- XCFzR3-z (I)
- where X is a C2 or a C3 unsaturated F, Cl, I or Br substituted alkyl radical, R is independently Cl, F or H, and z is 3, wherein said providing step comprises ensuring that said refrigerant does not include a fluoroalkene of Formula I which has no H substituent on an unsaturated terminal carbon, and further provided that said lubricant and said refrigerant have one liquid phase at least one temperature between about −50° C. and +70° C. measured at 5% by weight of lubricant based on the weight of the refrigerant and lubricant, and further provided that said refrigerant has a Global Warming Potential (GWP) of not greater than about 150;
- and
- (b) cooling air by causing heat to be transferred from the air to said refrigerant.
2 more elements
Dependencies are inferred from the claim text.