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BEP - the Best Efficiency Point of a Pump

BEP is where the pump is most efficient.

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A practical pump will never be able to convert all its kinetic energy to pressure energy. Parts of the energy will always be internal or external lost.

Internal Losses

hydraulic loss - due to disk friction in the impeller, rapid change in flow directions and velocity changes throughout the pump
volumetric loss - due to internal re-circulation caused by wear in rings and bushes

External Losses

mechanical loss - due to friction in seals and bearings

BEP - Best Efficiency Point

The maximum efficiency for a pump is normally in its "design point" - also called

BEP - or the "Best Efficiency Point"

For pumps operating in all other positions - the efficiency will be less than in BEP.

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Related Topics

Pumps - Piping systems and pumps - centrifugal pumps, displacement pumps - cavitation, viscosity, head and pressure, power consumption and more.

Related Documents

Centrifugal Pumps - An introduction to Centrifugal Pumps.
Centrifugal Pumps - Capacity Modulation - Modulating pumps to adapt capacities to variable process demands.
Centrifugal Pumps - Viscosity Influence - Hydrodynamic losses through pumps depends on fluid viscosities.
Comparing Hydraulic Pumps - Comparing different types of hydraulic pumps and their maximum pressures and flow.
Pump - Temperature Rise vs. Volume Flow - Calculate temperature rise vs. volume flow in pumps.
Pumps - Specific Speed - Characterizing of impeller types in pumps in a unique and coherent manner.
Pumps - Suction Specific Speed - Suction Specific Speed can be used to determine stable and reliable operations for pumps with max efficiency without cavitation.
System Curve and Pump Performance Curve - Utilize the system curve and the pump performance curve to select the proper pump for a particular application.

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