Question

A pump is pumping water at a flow rate of Q = 125 Liter per
minute against a head of 18 meters. Assuming the mechanical
efficiency of 85 %, what is the shaft power of the pump required
for the pump in Watts? Assume water density at 1000
kg/m^{3} and gravitational acceleration g = 9.81
m/s^{2}.

Answer #1

**Given data** : Q =
125 lt/min =
/ 60 sec = 2.0833 *
/sec

Head, H = 18m ,
= 1000 *Kg/**m3* , g = 9.81 *m/sec2*

Mechanical efficiency = 85%

The Power of the Pump required is given by

= = 432.787 Watt

Hence, Power **P = 432.787
W**

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