A sewage aeration blower running at 3,500 rpm is designed to deliver 34,000 m3/hr of air from 20°C and 1.03 kg/cm2 atmospheric pressure to a discharge pressure of 1.56 kg/cm2 with an efficiency of 70%. On a hot summer day, the atmospheric temperature rises to 43°C but the barometric pressure does not change. It is desired to vary the blower speed to maintain the same discharge pressure. Determine the blower speed, in RPM, for the summer operation.Determine the Brake Horsepower required, assuming that the efficiency remains constant and assume a mechanical efficiency of 0.9 (k = 1.4 for air).Determine corresponding flow in nominal meter cube per hour.
A sewage aeration blower running at 3,500 rpm is designed to deliver 34,000 m3/hr of air from 20°C and 1.03 kg/cm2 atmospheric pressure to a discharge pressure of 1.56 kg/cm2 with an efficiency of 70%. On a hot summer day, the atmospheric temperature rises to 43°C but the barometric pressure does not change. It is desired to vary the blower speed to maintain the same discharge pressure. Determine the blower speed, in RPM, for the summer operation.Determine the Brake Horsepower required, assuming that the efficiency remains constant and assume a mechanical efficiency of 0.9 (k = 1.4 for air).Determine corresponding flow in nominal meter cube per hour.
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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A sewage aeration blower running at 3,500 rpm is designed to deliver 34,000 m3/hr of air from 20°C and 1.03 kg/cm2 atmospheric pressure to a discharge pressure of 1.56 kg/cm2 with an efficiency of 70%. On a hot summer day, the atmospheric temperature rises to 43°C but the barometric pressure does not change. It is desired to vary the blower speed to maintain the same discharge pressure. Determine the blower speed, in RPM, for the summer operation.Determine the Brake Horsepower required, assuming that the efficiency remains constant and assume a
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