Academics – Applied Heat : 2017/OCT/08
Question
Q8. In a two-stage single acting reciprocating compressor, air is compressed from suction conditions of 0.9 bar, 20℃ to a delivery pressure of 12 bar.
The second stage entry conditions are 3 bar and 35℃.
The low-pressure cylinder has a bore of 300 mm, a stroke of 150 mm and a clearance volume of 2.5 % of swept volume.
The index of expansion and compression in both stages is 1.25.
The compressor speed is 300 rev/min
(a) Sketch the cycle on a pressure-Volume diagram. (2)
(b) Calculate EACH of the following:
(i) The free air delivered per hour at conditions of 1 bar and 0℃: (6)
(ii) The indicated power required to drive the compressor. (8)
Note : for air R = 287J⁄(kg K) and Cp = 1005 J⁄(kg K).
Asked in Year/Month/Ques No.
Hello Guest User,
Answers are available via our app only.
Please buy a membership plan and login via our app to view answers.
Please buy a membership plan and login via our app to view answers.