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# The figure below shows that a pump is used to transfer water from a reservoir at ground level to a storage take that is

## The figure below shows that a pump is used to transfer water from a reservoir at ground level to a storage take that is elevated. The pump is located 10 ft above the water surface of the reservoir (h) and the water surface in the tank is located 120 ft above the pump (h2). Pipe 1 is 50 ft long while pipe 2 is 950 ft long. Both 8-inch pipes have a friction factor of 0.02. The entrance loss coefficient is 0.9. Neglect other minor losses in the system. h EGL HGL Pipe 2 Pipe 1 h EGL HGL a) If the available net positive suction head is 19 ft, what is the flow rate in the system? Neglect the velocity head term in your NPSHA calculation as this is typically done when pumping from a reservoir in this calculation. The conditions are such that the atmospheric pressure is 14.7 psi, the vapor pressure of water is 0.33 psi, and the specific weight of water is 62.4 lb/ft. b) As an engineer, you want to operate the pump system using a factor of safety of 1.5. Given this, what minimum required net positive suction head would you want from the manufacturer for this pump? c) Calculate the pressure (in psi) at the suction side of the pump. d) What is the head required by the pump? e) If the overall pump system has an efficiency of 0.78, how much power would be required (i.e., how large would the pump need to be be in terms of horsepower)?

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