# Total Pump Efficiency

on . Posted in Fluid Dynamics

Total pump efficency, abbreviated as $$\eta_{tp}$$ (Greek symbol eta), a dimensionless number, is the conversion of one form of energy into another form of energy.

## Total Pump Efficiency formula

$$\large{ \eta_{tp} = \frac{WHP}{BHP} }$$
Symbol English Metric
$$\large{ \eta_{tp} }$$  (Greek symbol eta) = total pump efficiency   $$\large{dimensionless}$$
$$\large{ BHP }$$ = brake horsepower $$\large{\frac{ft-lbf}{sec}}$$  $$\large{\frac{Btu}{s}}$$
$$\large{ WHP }$$ = water horsepower $$\large{\frac{ft-lbf}{sec}}$$  $$\large{\frac{Btu}{s}}$$