Pump energy (centrifugal pump)


Centrifugal pumps are a sub-class of dynamic axis-symmetric work-absorbing turbo-machinery.The rotational energy typically comes from an engine or electric motor. The fluid enters the pump impeller along or near to the rotating axis and is accelerated by the impeller, flowing radially outward into a diffuser or volute chamber (casing), from where it exits. The energy usage in a pumping installation is determined by the flow required, the height lifted and the length and friction characteristics of the pipeline.

Related formulas


PiInput power (W)
ρFluid density (kg/m3)
gStandard gravity
HEnergy Head added to the flow (m)
QVolumetric flow rate (m3/s)
nEfficiency of the pump plant as a decimal (dimensionless)