A single stage centrifugal pump delivers 900 m^3/hr of sea water from a source where the water where the pressure is O.125 mpag. The pump discharges into surge tank rated at 300 psig, 3 m above the pump centerline. Loss of head due to friction in suction is 0.8 m and that in the discharge side is 3 m . Calculate the power required by the pump in kW.
This is a fluid machine question.
1. A single stage centrifugal pump delivers 900 m^3/hr of sea water from a source where the water where the pressure is O.125 mpag. The pump discharges into surge tank rated at 300 psig, 3 m above the pump centerline. Loss of head due to friction in suction is 0.8 m and that in the discharge side is 3 m . Calculate the power required by the pump in kW.
2. An atmospheric tank at standard ambient conditions will serve as the source for a pump. It is calculated the length of the suction pipe is 200 m with friction factor of 0.02. What would be the minimum height of water level in the tank that must be maintained above the centerline of the pump to avoid cavitation? Pump specifications are as follows:
Flow: 225 cu.m/hr
Head: 20 m
Power: 15 kN
Suction flange and Pipe Diameter: 200 mm
Discharge Flange and Pipe Diameter: 150mm
NPSHa: 6.5 m
NSPHr : 6m
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