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 delivery pressure of 1.8 MPa. Induction occurs at 92 kPa and 34°C. The mechanical and motor-drive efficiencies are 80% 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 temperature of the air at entrance to the 2nd intercooler? 2) calculate the temperature of the air at entrance to the 2nd intercooler in the presentable unit? 3) which formula should be used to calculate the rate of heat rejected in the 2nd intercooler?
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 delivery 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 temperature of the air at entrance to the 2nd intercooler?
2) calculate the temperature of the air at entrance to the 2nd intercooler in the presentable unit?
3) which formula should be used to calculate the rate of heat rejected in the 2nd intercooler?
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