Overall Efficiency

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Overall efficiency, abbreviated as \( \eta_o \)  (Greek symbol eta), a dimensionless number, measures the ratio of the output of actual power to the input of actual power.  It determines the amount of energy lost overall.

 

Overall Efficiency Formulas

\(\large{ \eta_o = \frac{ output\; HP \; 100 }{ input\; HP } }\) (motor) (pump) 
\(\large{ \eta_o = ME \; VE }\) (motor) (pump) 

Where:

\(\large{ \eta_o }\)  (Greek symbol eta) = overall efficiency

\(\large{ ME }\) = mechanical efficiency

\(\large{ VE }\) = volumetric efficiency

 

Tags: Equations for Efficiency