A centrifugal pump is driven by a motor. The performance of the pump reveals the following information:

Power input to the pump by the motor (kW):
0.5, 0.7, 0.9, 1.0, 1.2
Power input to the fluid by the pump (kW):
0.3, 0.55, 0.7, 0.9, 1.0
Plot the efficiency curve. The efficiency of a pump is a function of the flow rate.
Assume that the flow rate readings corresponding to power data points are equally
spaced.


As we mentioned in Section 13.5, efficiency of a pump, at a given operating

speed, is a function of flow rate. To plot the efficiency curve, we need to know

the flow rate corresponding to each power readings. For the given problem, we

assume that the flow rate readings corresponding to power data points that are

equally spaced. (Q2 = 2 Q1, Q3 = 3 Q1, Q4 = 4 Q1, Q5 = 5 Q1)



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