Best Efficiency Point - BEP

Maximum designed pump efficiency 

A pump does not completely convert kinetic energy to pressure energy. Some of the energy is always internal or external lost. 

Internal losses are

  • hydraulic - like disk friction in the impeller, loss due to rapid change in flow direction and change in velocities throughout the pump
  • volumetric losses - internal recirculation due to wear in rings and bushes

External losses

  • mechanical losses - friction in seals and bearings

pump efficiency bep

The efficiency of a pump at it's design point is normally it's maximum and called

  • BEP - Best Efficiency Point

It is normal to operate a pump in other positions than BEP, but the efficiency will always be lower than in BEP.

Related Topics

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

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