Below is a graph of a centrifugal pumps performance data in

Below is a graph of a centrifugal pump\'s performance data in the form of pump head, power input to the pump, and pump efficiency as a function of flow rate for pump speeds 1150rpm and 1750rpm. The curves in the graph show values for the supplied manufacturer\'s performance data and experimental values from the lab experiment.

Solution

one isothermal,

one polytropic