Binary refrigerating fluid
View Patent ↗Binary compositions of 2,3,3,3-tetrafluoropropene and difluoromethane, and especially to the uses thereof as a heat transfer fluid in compression systems with exchangers operating in counterflow mode or in split flow mode with counterflow tendency. Also, a method of heat transfer in which a binary composition of 2,3,3,3-tetrafluoropropene and difluoromethane is used as refrigerant in compression systems with exchangers in countercurrent mode or in crossed-current mode with countercurrent tendency.
1. A method of replacing a first heat transfer fluid comprising R-407C with a second heat transfer fluid comprising a refrigerant consisting essentially of from 70 to 90 wt. % 2,3,3,3-tetrafluoropropene and from 10 to 30 wt. % of difluoromethane, wherein said replacing is in a compression-type refrigeration system with an exchanger operating in countercurrent mode or in crossed-current mode with countercurrent tendency.
2. The method as claimed in claim 1 , wherein the refrigerant consists essentially of from 81 to 83 wt. % of 2,3,3,3-tetrafluoropropene and from 17 to 19 wt. % of difluoromethane.
3. The method as claimed in claim 1 , wherein the refrigerant consists essentially of from 78 to 84 wt. % of 2,3,3,3-tetrafluoropropene and from 16 to 22 wt. % of difluoromethane.
4. The method as claimed in claim 1 , wherein the refrigerant consists of from 70 to 90 wt. % of 2,3,3,3-tetrafluoropropene and from 10 to 30 wt. % of difluoromethane.
5. The method as claimed in claim 1 , wherein the refrigerant consists of from 81 to 83 wt. % of 2,3,3,3-tetrafluoropropene and from 17 to 19 wt. % of difluoromethane.
6. The method as claimed in claim 1 , wherein the refrigerant consists of from 78 to 84 wt. % of 2,3,3,3-tetrafluoropropene and from 16 to 22 wt. % of difluoromethane.
7. The method as claimed in claim 1 , wherein the second heat transfer fluid further comprises a stabilizer.
8. The method as claimed in claim 1 , wherein the second heat transfer fluid further comprises a lubricant.
9. The method as claimed in claim 8 , wherein the lubricant is mineral oil.
10. The method as claimed in claim 8 , wherein the lubricant is alkylbenzene.
11. The method as claimed in claim 8 , wherein the lubricant is polyalkylene glycol.
12. The method as claimed in claim 8 , wherein the lubricant is polyol ester.
13. The method as claimed in claim 8 , wherein the lubricant is polyvinyl ether.
14. The method as claimed in claim 1 , wherein said replacing is in a compression-type refrigeration system with an exchanger operating in countercurrent mode.
15. The method as claimed in claim 1 , wherein said replacing is in compression-type refrigeration systems with an exchanger operating in crossed-current mode with countercurrent tendency.