Pump Static Efficiency

Pump static efficiency, abbreviated as PSE, a dimensionless number, is efficiency under steady state or static conditions when pumping a fluid.  It is a measure of how effectively the pump converts input power into hydraulic energy in the fluid.  The static efficiency gives an indication of how well the pump is performing under steady state conditions.  Higher static efficiency values indicate that a larger percentage of the input power is being effectively transferred to the fluid as hydraulic power.  Factors such as pump design, wear, and internal losses can influence the static efficiency of a pump.

 

Pump Static Efficiency formula
\( PSE =  ( P_o \;/\; P_i ) \; 100 \)     (Pump Static Efficiency) \( P_o =   PSE \; P_i \;/\; 100 \) \( P_i =  P_o \; 100 \;/\; PSE \)
Symbol	English	Metric
\( PSE \) = pump static efficiency	\(dimensionless\)
\( P_o \) = output hydraulic power	\(lbm-ft^2 \;/\; sec\)	\(kg-m^2 \;/\; s\)
\( P_i \) = input shaft power	\(W\)	\(kg-m^2 \;/\; s^3\)