4. A compressor draws in 500 of air whose density is 0.079 min and discharges it with a density of 0.304 . At the suction, P1 = 15- and at the discharge, in? P2 = 80 lb The increase in the specific internal energy is 33.8 Btu and the Btu heat from the air by cooling is 13. Neglecting changes in the potential and lb kinetic energy determine the work done on the air in : Btu and in horsepower. min

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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4. A compressor draws in 500
min
ft³
of air whose density is 0.079
lb
and discharges
lb
At the suction, P, = 15 -
lb
it with a density of 0.304
and at the discharge,
in?
lb
The increase in the specific internal energy is 33.8
Btu
and the
lb
P2 = 80
in?
Btu
heat from the air by cooling is 13. Neglecting changes in the potential and
lb
Btu
kinetic energy determine the work done on the air in
min
and in horsepower.
Transcribed Image Text:4. A compressor draws in 500 min ft³ of air whose density is 0.079 lb and discharges lb At the suction, P, = 15 - lb it with a density of 0.304 and at the discharge, in? lb The increase in the specific internal energy is 33.8 Btu and the lb P2 = 80 in? Btu heat from the air by cooling is 13. Neglecting changes in the potential and lb Btu kinetic energy determine the work done on the air in min and in horsepower.
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