One hundred (100) kmol hr -1of ethylene is compressed from 1.2 bar and 300 K to 6 bar by an electric motor driven compressor. Determine the capital cost C of the unit. Treat ethylene as an ideal gas with constant Cp = 50.6 J mol-1 K-1.
Data: ή (compressor) = 0.70
C (cotnprcssor)/$ = 3,040(WS/kW)0.952
Where = Ws = isentropic power requirement for the compressor.
C (motor)/y$ = 38(We [/kW)0.855
Where We = delivered shaft power of motor.