Heat transfer fluid replacing r-410a

Abstract

A heat transfer method using ternary composition containing 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane and difluoromethane, as a heat transfer fluid in refrigeration systems, to replace the R-410A mixture.

1 - 11 . (canceled) 
     
     
         12 . A method of modifying a heat transfer system containing R-410A comprising removing R-410A and adding refrigerant comprising a ternary composition of 2,3,3,3-tetrafluoropropene, difluormethane, and 1,1-difluoroethane. 
     
     
         13 . The method as claimed in  claim 12 , wherein the refrigerant further comprises a stabilizer. 
     
     
         14 . The method as claimed in  claim 13 , wherein the stabilizer is selected from the group consisting of nitromethane, ascorbic acid, terephthalic acid, azoles, phenolic compounds, epoxides, phosphites, phosphates, phosphonates, thiols and lactones. 
     
     
         15 . The method as claimed in  claim 13 , wherein stabilizer represents at most 5% by weight relative to the refrigerant. 
     
     
         16 . The method as claimed in  claim 12 , wherein the heat transfer system is of the compression type. 
     
     
         17 . The method as claimed in  claim 16 , wherein the heat transfer system operates with exchangers in countercurrent mode or in crossed-current mode with countercurrent tendency. 
     
     
         18 . The method as claimed in  claim 12 , wherein the refrigerant further comprises a lubricant. 
     
     
         19 . The method as claimed in  claim 18 , wherein the lubricant is selected from the group consisting of mineral oil, alkylbenzene, polyalkylene glycol and polyvinyl ether. 
     
     
         20 . A heat transfer system comprising exchangers operating in countercurrent mode or in crossed-current mode with countercurrent tendency and a refrigerant comprising a ternary composition of 2,3,3,3-tetrafluoropropene, difluormethane, and 1,1-difluoroethane. 
     
     
         21 . The method as claimed in  claim 20 , wherein the refrigerant further comprises a stabilizer. 
     
     
         22 . The method as claimed in  claim 21 , wherein the stabilizer is selected from the group consisting of nitromethane, ascorbic acid, terephthalic acid, azoles, phenolic compounds, epoxides, phosphites, phosphates, phosphonates, thiols and lactones. 
     
     
         23 . The method as claimed in  claim 21 , wherein stabilizer represents at most 5% by weight relative to the refrigerant. 
     
     
         24 . The method as claimed in  claim 20 , wherein the heat transfer system is of the compression type. 
     
     
         25 . The method as claimed in  claim 20 , wherein the heat transfer system is a compression-type low- and medium-temperature refrigeration system. 
     
     
         26 . The method as claimed in  claim 20 , wherein the refrigerant further comprises a lubricant. 
     
     
         27 . The method as claimed in  claim 26 , wherein the lubricant is selected from the group consisting of mineral oil, alkylbenzene, polyalkylene glycol and polyvinyl ether.