Exergy analysis methodology, for irreversibilities evaluation and for calculation of their sensitivity to design variables variations, is expounded and applied to an industrial compression heat pump system for waste heat recovery. The net temperature lift is 45 °C and the low temperature level is 65 °C. As working fluid R114, R21, Rll and R113 are considered. A Rankine cycle with typical design variables values and inefficiencies is analyzed. Driving power savings corresponding to reasonable design variable variations are assessed.
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