Efficiency and power consumption of pump

The ratio: output power / input power, gives the efficiency of the pump.

The output power is the power applied to the fluid to meet the requirements of network throughput..

• if the power consumption is measured at the shaft of the pump, the ratio of the output power by the power consumption gives the performance of the pump body without the engines
• If the power consumption is measured by power consumption of the pump motor, the ratio of effective power by the power input gives you the efficiency of your pump including engine efficiency.

Example of pump performance curve given in%:

Here the maximum efficiency is 57% (pump + motor)