Compositions containing difluoromethane and fluorine substituted olefins
AssigneeHoneywell International Inc.
InventorsRyan Hulse, Rajiv Ratna Singh, Justin Becker, Robert Gerard Richard, Rajat S. Basu, Hang T. Pham, Ian Shankland
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Abstract
Compositions comprising multi-fluorinated olefins and HFC-32 are disclosed. Such compositions are useful particularly for in stationary refrigeration and air conditioning equipment.
Claims21
A heat transfer composition comprising a refrigerant composition consisting essentially of:
- (a) difluoromethane (R-32) in an amount from about 60 weight percent to about 70 weight percent;
- and
- (b) 2,3,3,3-tetrafluoropropene (HFO-1234yf) in an amount from about 30 weight percent to about 40 weight percent;
- and
- wherein said refrigerant has an evaporator glide and a compressor glide of less than about 5° C.
-13. (canceled)
A method of providing cooling in an air conditioning system of the type comprising a compressor, a condenser, an evaporator and a heat transfer composition in the system, the method comprising:
- a. circulating said heat transfer composition in the system;
- wherein said heat transfer composition comprises a refrigerant consisting essentially of:
- (i) difluoromethane (R-32) in an amount from about 60 weight percent to about 70 weight percent;
- and
- (ii) 2,3,3,3-tetrafluoropropene (HFO-1234vf) in an a mount from about 30 weight percent to about 40 weight percent;
- and;
- b. providing cooling by evaporating said refrigerant in said condenser,
- wherein said system operates with a system capacity of at least 92% relative to that of R-410A and wherein the system operates with an evaporator glide of 5° C. or less.
An air conditioning system of the type comprising a compressor, a condeser, an evaporator and a heat transfer composition in the system, the improvement comprising said heat transfer composition comprising a refrigerant consisting essentially of:
- (i) difluoromethane (R-32) in an amount from about 60 weight percent to about 70 weight percent;
- and
- (ii) 2,3,3,3-tetrafluoropropene (HFO-1234yf) in an amount from about 30 weight percent to about 40 weight percent, wherein in operation said system operates with a capacity of at least 92% relative to that of R-410A.
Dependencies are inferred from the claim text.