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BEP - the Best Efficiency Point of a Pump

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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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