A pump delivers water at a flow of 10 cubic feet per second (cfs) from a lower reservoir to an upper reservoir through 16-inch diameter steel pipe (e = 0.00020 feet) that is 3,500 feet long. The water temperature is 50°F. The water surface elevation of the upper reservoir is 150 feet higher than the water surface elevation of the lower reservoir. Use the Darcy-Weisbach equation to evaluate friction head loss hyic. Assume the minor head loss hminer is 10% of the friction head loss hic- a) Determine the friction head loss and minor head losses in feet b) Determine the total dynamic head hpump of the pump in feet. c) Determine the required motor horsepower of the pump in horsepower (hp) if the efficiency of the pump is 65% and the efficiency of the electric motor is 85%.
A pump delivers water at a flow of 10 cubic feet per second (cfs) from a lower reservoir to an upper reservoir through 16-inch diameter steel pipe (e = 0.00020 feet) that is 3,500 feet long. The water temperature is 50°F. The water surface elevation of the upper reservoir is 150 feet higher than the water surface elevation of the lower reservoir. Use the Darcy-Weisbach equation to evaluate friction head loss hyic. Assume the minor head loss hminer is 10% of the friction head loss hic- a) Determine the friction head loss and minor head losses in feet b) Determine the total dynamic head hpump of the pump in feet. c) Determine the required motor horsepower of the pump in horsepower (hp) if the efficiency of the pump is 65% and the efficiency of the electric motor is 85%.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A pump delivers water at a flow of 10 cubic feet per second (cfs) from a lower reservoir to an upper
reservoir through 16-inch diameter steel pipe (ɛ = 0.00020 feet) that is 3,500 feet long. The water
temperature is 50°F. The water surface elevation of the upper reservoir is 150 feet higher than the water
surface elevation of the lower reservoir. Use the Darcy-Weisbach equation to evaluate friction head loss
hyic. Assume the minor head loss hminor is 10% of the friction head loss hic-
a) Determine the friction head loss and minor head losses in feet
b) Determine the total dynamic head hpump of the pump in feet.
c) Determine the required motor horsepower of the pump in horsepower (hp) if the efficiency of the
pump is 65% and the efficiency of the electric motor is 85%.
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