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Water at 3 0 deg C is pumped from a pressurized reservoir ( 5 psig ) to an open storage tank atop a building
Water at deg C is pumped from a pressurized reservoir psig to an open storage tank atop a building by means of a centrifugal pump. The level of water in the pressurized reservoir is ft above the centerline of the pump. The piping system consists of ft equivalent length of SCH steel pipe containing one globe valve bevelseat and four deg standard elbows from the pressurized reservoir to the pump; SCH pipe follows the pump for an equivalent length of ft after which the pipe size is decreased to SCH steel pipe for an equivalent length of ff to the tank. The SCH pipe contains two deg standard elbow.If it is desired to maintain a flow of water of gpm into the storage tank and the level of the liquid in the storage tank is ft above the centerline of the pump, determine the following at the suction and discharge points:
a total friction head
b suction pressure and discharge pressure psig
c average velocities fts
Calculate the following:
total discharge head ft
total suction head ff
total dynamic head ft
theoretical power hP
brake horsepower with nhP
NPSHA ft Will cavitation occur if the NPSH rating of the pump is ft
Note:
a Provide a summary of your answers a to c; to Label appropriately.b Use g ftsb Conversion factor: f gal and gmL lbmft
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