2013-3-6 Isentropic Compressor Efficiency The isentropic compressor efficiency is the ratio of the minimum theoretical work input to the actual work input,each per unit of mass flowing: work required in an isentropic n from r inlet (-Wev/rit)s h2s m (Eq.6.48 （-W/m)h-h red in an actual Actual Vapor-Compression Cycle Example:The table provides steady-state operating data for a vapor-compression refrigeration cycle using R-134a as the working fluid.For a refrigerant mass flow rate of 0.08 kg/s,determine the (a)compressor power,in kW, (b)refrigeration capacity,in tons, (c)coefficient of performance. (d)isentropic compressor efficiency 岛 7 2013-3-6 7 Isentropic Compressor Efficiency ►The isentropic compressor efficiency is the ratio of the minimum theoretical work input to the actual work input, each per unit of mass flowing: (Eq. 6.48) work required in an actual compression from compressor inlet state to exit pressure work required in an isentropic compression from compressor inlet state to the exit pressure Actual Vapor-Compression Cycle (a) compressor power, in kW, (b) refrigeration capacity, in tons, (c) coefficient of performance, (d) isentropic compressor efficiency. Example: The table provides steady-state operating data for a vapor-compression refrigeration cycle using R-134a as the working fluid. For a refrigerant mass flow rate of 0.08 kg/s, determine the State h (kJ/kg) 1 241.35 2s 272.39 2 280.15 3 91.49 4 91.49