(b) An air motor operates with a cylinder bore of 65 mm and maximum stroke of 115 mm. The supply pressure is 6.5 bar at 28°C with the exhaust pressure is maintained at atmospheric pressure. The air motor clearance volume is 5% of the swept volume and the cut-off ratio is 0.5. The induced air is compressed by the returning piston after it has travelled 95% through its stroke. Given that pV'=constant, calculate; (1) the resulting temperature (K) at the end of expansion; (ii) the indicated power (kW) of the motor at 400 rpm; and (iii) the mass flowrate (kg/min) of air supplied by the air motor.
(b) An air motor operates with a cylinder bore of 65 mm and maximum stroke of 115 mm. The supply pressure is 6.5 bar at 28°C with the exhaust pressure is maintained at atmospheric pressure. The air motor clearance volume is 5% of the swept volume and the cut-off ratio is 0.5. The induced air is compressed by the returning piston after it has travelled 95% through its stroke. Given that pV'=constant, calculate; (1) the resulting temperature (K) at the end of expansion; (ii) the indicated power (kW) of the motor at 400 rpm; and (iii) the mass flowrate (kg/min) of air supplied by the air motor.
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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Transcribed Image Text:(b)
An air motor operates with a cylinder bore of 65 mm and maximum stroke of 115
mm. The supply pressure is 6.5 bar at 28°C with the exhaust pressure is maintained
at atmospheric pressure. The air motor clearance volume is 5% of the swept volume
and the cut-off ratio is 0.5. The induced air is compressed by the returning piston
after it has travelled 95% through its stroke. Given that pVl=constant, calculate;
(i)
the resulting temperature (K) at the end of expansion;
(ii)
the indicated power (kW) of the motor at 400 rpm; and
(ii)
the mass flowrate (kg/min) of air supplied by the air motor.
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