HEAT TRANSFER FLUID REPLACING R-410A
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.