| 摘要 |
A heat transfer compositions comprise: <SL> <LI>(i) R-1225ye; <LI>(ii) at least one further refrigerant selected from carbon dioxide (R-744); fluoromethane (R-41); fluoroethane (R-161); 1,1,1 -trifluoroethane (R143 a); 1,1,1,2-tetrafluoroethane (R-134a); 1,1,2,2-tetrafluoroethane (R-134); dimethyl ether; heptafluoroproane (R-227ea); propane (R-290); propene (R-1270); isobutane (R-600a); n-butane (R-600) 2,3,3,3- tetrafluoropropene (R-1234yf); 1,1-difluorocyclopropane; 1,1,2-trifluorocyclopropane; 1,1,2,2-tetrafluorocyclopropane; pentafluorocyclopropane, pentafluoroethane (R-125) or ammonia or mixtures thereof. Further similar mixtures form the basis of preferred embodiments including compositions based on the isomer R-1225yeZ and similar co-refrigerants in differing combinations. The compositions are used for conventional refrigeration applications such as automobile air conditioning or as aerosol propellants or in vapour phase heating or cooling applications. </SL> |
