Working fluids for thermal energy conversion of waste heat from fuel cells using rankine cycle systems

Abstract From the Canadian patent

A process for recovering waste heat which comprises: (a) passing a liquid phase , working fluid through a heat exchanger in communication with a process which produces the waste heat; (b) removing a vapor phase working fluid from the heat , exchanger; (c) passing the vapor phase working fluid to an expander wherein , the , waste heat is converted into mechanical energy; and (d) passing the vapor phase , working fluid from the expander to a condenser wherein the vapor phase , working , fluid is condensed to the liquid phase working fluid. The preferred working fluid is an , organic Rankine cycle system working fluid comprising one or more compounds of Formula (I) (I) CR'y, wherein y is …