Heat transfer compositions

Abstract

Heat transfer compositions are usable in their own right or are suitable as a replacement for existing refrigeration usages. The compositions possess a reduced Greenhouse Warming Potential, yet have a capacity and energy efficiency (which may be conveniently expressed as the “Coefficient of Performance”) ideally within 20% of the values of those attained using R-134a, and preferably within 10% or less (e.g. about 5%) of these values.

1 . A composition comprising R-1243zf (3,3,3 trifluoropropene), R-134a (1,1,1,2 tetrafluoroethane) and R-32 (difluoromethane). 
     
     
         2 . A composition according to  claim 1  further comprising a lubricant. 
     
     
         3 . A composition according to  claim 1  further comprising a stabiliser. 
     
     
         4 . A composition according to  claim 1  further comprising an additional flame retardant. 
     
     
         5 . A composition according to  claim 1  wherein the composition is non-flammable. 
     
     
         6 . A composition according to  claim 1  which is a refrigerant composition. 
     
     
         7 . A composition according to  claim 1  which is azeotrope-like. 
     
     
         8 . A composition according to  claim 1  which has a GWP of about 750 or less. 
     
     
         9 . A composition according to  claim 8  which has a GWP of about 150 or less. 
     
     
         10 . A composition according to  claim 9  which has a GWP of about 100 or less. 
     
     
         11 . A heat transfer device containing a composition comprising R-1243zf (3,3,3 trifluoropropene), R-134a (1,1,1,2 tetrafluoroethane) and R-32 (difluoromethane). 
     
     
         12 . A heat transfer device according to  claim 11  which is a refrigeration device. 
     
     
         13 . A heat transfer device according to  claim 12  which is selected from automotive air conditioning systems, residential air conditioning systems, commercial air conditioning systems, residential refrigerator systems, residential freezer systems, commercial refrigerator systems, commercial freezer systems, chiller air conditioning systems, chiller refrigeration systems and heat pump systems. 
     
     
         14 . A heat transfer device according to  claim 13  which is an automotive air conditioning system. 
     
     
         15 . A heat transfer device according to  claim 11  which contains a compressor. 
     
     
         16 . A method for cooling an article which comprises condensing a composition comprising R-1243zf (3,3,3 trifluoropropene), R-134a (1,1,1,2 tetrafluoroethane) and R-32 (difluoromethane), and thereafter evaporating the composition in the vicinity of the article to be cooled. 
     
     
         17 . The method of  claim 16 , wherein the method is carried out with an automotive air conditioning system. 
     
     
         18 . The method of  claim 16 , where the composition has a GWP of 750 or less. 
     
     
         19 . The method of  claim 16 , wherein the composition is non-flammable. 
     
     
         20 . The method of  claim 16 , wherein the composition is azeotrope-like.