Knowledge sharing on “All about Centrifugal Pumps” for Engineering students/young Engineers/professionals of oil & gas industry. Series -7

 

Know about different kind of losses in a centrifugal pump with their brief descriptions.

Losses in a CP are classified as:

1.   Hydraulic loss: These are caused by shocks, eddy currents, and friction of the fluid in its path through the impeller and casing waterways.

2.   Disk-friction Losses: These are commonly known as “Disk horse-power” which represent the power required to rotate the impeller in the liquid surrounding it in the pump casing. With other factors constant , the disk horsepower increases rapidly with the viscosity of pumping liquid.

3.   Short-circuit losses: They are losses caused by leakage from the discharge to the suction side of a pump through the clearances between the casing and impeller wear rings. This leakage reduces the effective capacity of the pump because the leakage has to be re- pumped from suction to discharge.

4.   Mechanical losses: They are losses resulting from friction in the stuffing boxes and the pump bearings

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