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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) calculate the rate of heat rejected in the 2nd intercooler (kW) ? 2) which formula should be used to calculate the mass flow rate of the compressor? 3) calculate the mass flow rate of the compressor (kg/min)

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) calculate the rate of heat rejected in the 2nd intercooler (kW) ? 2) which formula should be used to calculate the mass flow rate of the compressor? 3) calculate the mass flow rate of the compressor (kg/min)

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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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) calculate the rate of heat rejected in the 2nd intercooler (kW) ?

2) which formula should be used to calculate the mass flow rate of the compressor?

3) calculate the mass flow rate of the compressor (kg/min)

 

 

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