| abstract |
A heat transfer process using a composition containing hydro (chloro) fluoroolefin, particularly a refrigerant evaporation stage, a compression stage, a refrigerant liquid agglomeration stage at a temperature of 70 ° C. or higher, and a refrigerant expansion stage. And a heat transfer process using a compression system having at least one stage of a series of steps. The refrigerant includes at least one hydrofluoroolefin having at least four carbon atoms represented by the following formula: R 1 CH═CHR 2 (where R 1 and R 2 are independently of each other at least And represents an alkyl group having 1 to 6 carbon atoms which is substituted with one fluorine atom and optionally substituted with at least one chlorine atom) |