A compressor draws in 500 cubic feet per minute of air whose density is 0.079 pounds per cubic feet and discharges it with a density of 0.304 pounds per cubic feet. At the suction, pressure # 1 = 15 pounds per square inches and at the discharge, pressure # 2 = 80 pounds per square inches. The increase in internal energy is 33.8 Btu per pound of air, and the heat rejected from air by cooling is 13 Btu per pound of air. Determine the work done on the air in Btu per minute and in horsepower.
A compressor draws in 500 cubic feet per minute of air whose density is 0.079 pounds per cubic feet and discharges it with a density of 0.304 pounds per cubic feet. At the suction, pressure # 1 = 15 pounds per square inches and at the discharge, pressure # 2 = 80 pounds per square inches. The increase in internal energy is 33.8 Btu per pound of air, and the heat rejected from air by cooling is 13 Btu per pound of air. Determine the work done on the air in Btu per minute and in horsepower.
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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Instruction: Show your solution. (Engineering Utilities 2) Problem: A compressor draws in 500 cubic feet per minute of air whose density is 0.079 pounds per cubic feet and discharges it with a density of 0.304 pounds per cubic feet. At the suction, pressure # 1 = 15 pounds per square inches and at the discharge, pressure # 2 = 80 pounds per square inches. The increase in internal energy is 33.8 Btu per pound of air, and the heat rejected from air by cooling is 13 Btu per pound of air. Determine the work done on the air in Btu per minute and in horsepower. (1Btu = 778.16 ft-lbf; 1hp = 42.4 Btu/min)
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