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1) which formula should be used to calculate  the intermediate pressure? 2) calculate the intermediate pressure between the first and the second stage on kPa? 3 calculate the intermediate pressure between the second and the third stage in kPa?

1) which formula should be used to calculate  the intermediate pressure? 2) calculate the intermediate pressure between the first and the second stage on kPa? 3 calculate the intermediate pressure between the second and the third stage in kPa?

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) which formula should be used to calculate  the intermediate pressure?

2) calculate the intermediate pressure between the first and the second stage on kPa?

3 calculate the intermediate pressure between the second and the third stage in kPa?

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