three-stage single acting air compressor with a polytropic index of 1.22 in all stages, runs in an atmosphere at 101.3 kPa and 25°C. It has a FAD of 4.2 m^3/min with a dilivery pressure of 1.8 MPa. Induction occurs at 92 kPa and 34°C. The mechanical and motor-driver efficiencies are 88% and 93% respectively. Assume complete inter-cooling and neglect clearance volume. Cp=1.006 kJ/kg K Cv=0.717 kJ/kg K 1) which formula should be used to calculate the intermediate pressures? 2) calculate the intermediate pressure between the first and the second stage in kPa? 3) calculate the intermediate
A three-stage single acting air compressor with a polytropic index of 1.22 in all stages, runs in an atmosphere at 101.3 kPa and 25°C. It has a FAD of 4.2 m^3/min with a dilivery pressure of 1.8 MPa. Induction occurs at 92 kPa and 34°C. The
Cp=1.006 kJ/kg K
Cv=0.717 kJ/kg K
1) which formula should be used to calculate the intermediate pressures?
2) calculate the intermediate pressure between the first and the second stage in kPa?
3) calculate the intermediate pressure between the second and the third stage in kPa?
4) which formula should be used to calculate the temperature of the air at entrance to the 2nd intercooler?
5) calculate the temperature of the air at entrance to the 2nd intercooler in the presentable unit?
6) which formula should be used to calculate the rate of heat rejected in the 2nd intercooler?
7) calculate the rate of heat rejected in the 2nd intercooler (KW) ?
8) which formula should be used to calculate the mass flow rate of the compressor?
9) calculate the rate of air in the compressor (kg/min) ?
10) which formula should be used to determine the indicated power of the compressor?
11) calculate the indicated power required of the compressor in kW?
12) which formula should be used to determine the input power required from an electric motor?
13) calculate the input power required from an electric motor
Figure that represents the diagram for the process?
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