A scale model of a pump has been tested and the following results obtained. Impeller diameter (D)           110mm Power input (P)                   2.5kW  Speed (N)                           1500 r.p.m. Flow (Q

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A scale model of a pump has been tested and the following results obtained.

Impeller diameter (D)           110mm

Power input (P)                   2.5kW

 Speed (N)                           1500 r.p.m.

Flow (Q)                              14.5 litres/sec

Head (H)                             17m

Efficiency (E)                      60%

 

You are to determine the speed and size of a geometrically similar pump which would deliver a flow rate of 25 litres/sec against a 22m resistance head. Determine the power input required by this pump.

 

 

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