4. Air is compressed polytropically from 101 kPa and 23°C and delivered to a tank at 1500 kPa and 175°C. Determine per kilogram of air (a) the value of n. b) power need in KW for 1 kg/sec of air. Useful data: k of air = 1.4, Rair= 0.287 KJ/Kgm-K; k of He = 1.66, RHe = 2.078 KJ/Kgm-K

4. Air is compressed polytropically from 101 kPa and 23°C and delivered to a tank at 1500 kPa and 175°C. Determine per kilogram of air (a) the value of n. b) power need in KW for 1 kg/sec of air. Useful data: k of air = 1.4, Rair= 0.287 KJ/Kgm-K; k of He = 1.66, RHe = 2.078 KJ/Kgm-K

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

V
S
Air is compressed polytropically from 101 kPa and
23°C and delivered to a tank at 1500 kPa and 175°C.
Determine per kilogram of air (a) the value of n.
b) power need in KW for 1 kg/sec of air.
Useful data: k of air = 1.4, Rair= 0.287 KJ/Kgm-K;
k of He = 1.66, RHe = 2.078 KJ/Kgm-K
5.a
5.b
P
T
S

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