Abstract

Thermodynamic properties and thermal stability of working fluids used in Rankine cycle systems and heat pumps were studied.Five fluids, R 114, 2, 2, 2-triflu oroethanol, 2, 2, 3, 3-tetrafluoro-1-propanol, 2, 2, 3, 3, 3-pentafluoro1-propanol and azeotropic mixture of the pentafluoro-l-propanol with water were chosen as working fluids and their thermodynamic proparties and cyclic properties were investigated at 140∼200°C.The results showed that pentafluoro-l-propanol could exibit the maximum gross and net output above 180°C with neither possible inflammability nor deterionaion of thermal stability.

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