One bomba practice will never be able to convert all of your kinetic energy into pressure energy. Parts of the energy will always be lost internally or externally.
Internal Losses
- hydraulic loss – due to disc friction on the impeller, rapid change in flow directions and speed changes throughout the pump
- volumetric loss – due to internal recirculation caused by wear of rings and bushings
External losses
- mechanical loss – due to friction in seals and bearings
Best Efficiency Point
The maximum efficiency of a pump is normally at its “design point” – also called
- SME- or the “Best Efficiency Point”
For pumps operating in all other positions – efficiency will be lower than in PME.
