| abstract |
The present invention relates to the use of a refrigerant in organic Rankine cycle systems comprising at least one hydrofluoroolefin, having at least four carbon atoms represented by the formula (I) R1CH=CHR2 in which R1 and R2 independently represent alkyl groups having from 1 to 6 carbon atoms, substituted with at least one fluorine atom, optionally with at least one chlorine atom. |