Answered: Water is pumped from a reservoir to a…

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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Water is pumped from a reservoir to a pressurized storage tank (P = 150 kPa gauge) atop a building by means of a centrifugal pump. There is a 70-m difference in elevation between the water surface in the reservoir and the end of the discharge line. The piping system consists of 80m of 5" SCH 40 steel pipe containing two 90^o elbows, one gate valve, one rotary water meter, and six couplings from the reservoir to the pump; 3" SCH 40 steel pipe for 86m to the tank. The 3" pipe contains two gate valves, four 90^o elbows, and ten couplings. It is desired to maintain a flow of water into the tank of 2.4 m³/min. Water temperature is 25^oC. If the pump-motor set has efficiency of 65%, what would be the pumping costs be in pesos per day if electricity costs PhP 10.50/kW-hr?

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