Pump efficiency is the ratio of the water horsepower delivered by the pump and the brake horsepower delivered to the pump shaft. Pump Efficiency. Thermal Engineering
Pump efficiency is the ratio of the water horsepower delivered by a centrifugal pump and the brake horsepower delivered to the pump shaft. When selecting a pump, a key concern is optimizing pumping efficiency. 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. The power required to drive a pump is defined simply using SI units by:
P is the input power required (W)
BHP is the brake horsepower
ρ is the fluid density (kg/m3 )
g is the standard acceleration of gravity (9.81 m/s2 )
H is the net pump head added to the flow (m)
Q is the flow rate (m3 /s)
η is the efficiency of the pump
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