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 atmos

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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 Atmos 1 (115.75 KiB) Viewed 16 times

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. A) Determine the blower speed, in RPM, for the summer operation. 11,777 965 30,506 2,018 3,635 B) Determine corresponding flow in nominal meter cube per hour. 3,635 30,506 965 11,777 2,018 C) Determine the Brake Horsepower required, assuming that the efficiency remains constant and assume a mechanical efficiency of 0.9 (k = 1.4 for air). 2,018 11,777 3,635 965 30,506