12 kg of air per minute is delivered by a centrifugal air compressor It enters the compressor at a velocity of 12 m/s with a pressure of 1 bar and specific volume of 0. 5 m2/kg and leaves at a velocity of 90 m/s with a pressure of 8 bar and specific volume of 0.14 m/kg. The increase in enthalpy of air passing through the compressor is (hz-hi = 150 kJ/kg) and heat loos to the surroundings at a rate of 700 kJ/min. Assume the inlet and discharge line are at the same level. Answer the following; What are the main assumptions b. Calculate the power required to drive the compressor, in kW c. Calculate the ratio of inlet and outlet pipe diameter? a.

12 kg of air per minute is delivered by a centrifugal air compressor It enters the compressor at a velocity of 12 m/s with a pressure of 1 bar and specific volume of 0. 5 m2/kg and leaves at a velocity of 90 m/s with a pressure of 8 bar and specific volume of 0.14 m/kg. The increase in enthalpy of air passing through the compressor is (hz-hi = 150 kJ/kg) and heat loos to the surroundings at a rate of 700 kJ/min. Assume the inlet and discharge line are at the same level. Answer the following; What are the main assumptions b. Calculate the power required to drive the compressor, in kW c. Calculate the ratio of inlet and outlet pipe diameter? a.

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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Question

12 kg of air per minute is delivered by a centrifugal air compressor It enters the compressor at a velocity
of 12 m/s with a pressure of 1 bar and specific volume of 0. 5 m²/kg and leaves at a velocity of 90 m/s
with a pressure of 8 bar and specific volume of 0.14 m/kg. The increase in enthalpy of air passing
through the compressor is (hz-hi = 150 kJ/kg) and heat loos to the surroundings at a rate of 700
kJ/min. Assume the inlet and discharge line are at the same level. Answer the following;
a. What are the main assumptions
b. Calculate the power required to drive the compressor, in kW
c. Calculate the ratio of inlet and outlet pipe diameter?
Air out
Boundary
d2
Centrifugal
compressor
di
Air in

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