top of page
Pumping system efficiency


- electric power



- shaft power of a pump
- hydraulic power of a flow at the pump outlet
- pump efficiency

- efficiency of an electric motor

- efficiency of a pump unit (pump+electric motor)
Useful power of a pump is hydraulic power of a flow Phyd

- Watts, hydraulic power



- m3/s, flow of a pump
- m, head of a pump, the difference between suction and outlet head
- specific gravity, m2/s

- density, kg/m3

- kW, this is the simplified formula of a hydraulic power for a water. This formula is more convenient because it uses units of Q m3/h.

- kWatt


- bar, pump pressure, the difference between outlet and inlet pressure
- m3/h, flow of a pump

- pump shaft power

- consumed electric power by the electric motor

- consumed electric power by the electric motor

- overall efficiency of a pump unit (pump+el. motor+drive)
What results and what information is necessary to receive after field tests?
bottom of page