Heat transfer method

Abstract

The invention relates to a heat transfer method using ternary compositions containing 2,3,3,3-tetrafluoropropene, 1,1-difluoroethane and difluoromethane, said compositions being especially interesting as a heat transfer fluid in compression refrigeration systems comprising exchangers operation in counterflow mode or in split flow mode with counterflow tendency.

1 . (canceled) 
     
     
         2 . The heat transfer system as claimed in  claim 6 , characterized in that the ternary composition consists essentially of from 20 to 80 wt. % of 2,3,3,3-tetrafluoropropene and from 15 to 40 wt. % of difluoromethane and from 5 to 40 wt. % of difluoroethane. 
     
     
         3 . The heat transfer system as claimed in  claim 6 , characterized in that the ternary composition consists essentially of from 20 to 70 wt. % of 2,3,3,3-tetrafluoropropene and from 20 to 40 wt. % of difluoromethane and from 10 to 40 wt. % of difluoroethane. 
     
     
         4 . (canceled) 
     
     
         5 . The heat transfer system as claimed in  claim 6 , characterized in that the ternary composition is stabilized. 
     
     
         6 . A heat transfer system comprising a compression-type refrigeration system with 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, 1,1-difluoroethane and difluoromethane. 
     
     
         7 . The heat transfer system as claimed in  claim 6 , characterized in that the ternary composition consists essentially of from 35 to 70 wt. % of 2,3,3,3-tetrafluoropropene and from 20 to 25 wt. % of difluoromethane and from 10 to 40 wt. % of difluoroethane. 
     
     
         8 . The heat transfer system as claimed in  claim 6 , characterized in that further comprises a lubricant.