5. A two-stage double-acting compressor is to deliver 90 lb/min of air from 14.3 psia and 90°F to a final pressure of 185 psia. The normal barometer is 29.8 in. Hg and the temperature is 80°F. The pressure drop in the intercooler is 3 psi and the temperature of the air at the exit of the intercooler is 90°F, the speed is 210 RPM and PV C during compression and expansion. The clearance is 5% for both cylinders. The temperature of the cooling water increases by 18°F. Find (a) volume of free air, (b) discharge pressure of LP cylinder for minimum work, (c) temperature at discharge for both 1.34 =

5. A two-stage double-acting compressor is to deliver 90 lb/min of air from 14.3 psia and 90°F to a final pressure of 185 psia. The normal barometer is 29.8 in. Hg and the temperature is 80°F. The pressure drop in the intercooler is 3 psi and the temperature of the air at the exit of the intercooler is 90°F, the speed is 210 RPM and PV C during compression and expansion. The clearance is 5% for both cylinders. The temperature of the cooling water increases by 18°F. Find (a) volume of free air, (b) discharge pressure of LP cylinder for minimum work, (c) temperature at discharge for both 1.34 =

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter46: Room Air Conditioners

Section: Chapter Questions

Problem 7RQ

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