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Unformatted text preview: the thermodynamic property table for propane, we can obtain the value of specific volumes. Engineering units (SI) for pressures & Pe Pi is , Pascal Pa for specific volumes, & ve vi is / m3 kg ** Subscripts e for exit and i for inlet. And, k is the isentropic index of compression which can be calculated using = k CpCv Value of k in general cases is taken as 1.4. Engineering units (SI) for specific heat at constant pressure, Cp is kJkgK specific heat at constant volume, Cv is kJkgK specific enthalpy at exit, he is / kJ kg specific enthalpy at inlet, hi is / kJ kg Using equation  we can obtain the polytropic efficiency for this case....
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- Spring '11