Brake Horsepower

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Brake horsepower, abbreviated as BPH, is the engine's horsepower required to overcome the loss in power caused by the pump.

 

Brake Horsepower formulas

\(\large{ BHP = \frac{ 100 \; Q \; h_t }{ 3960 \; \eta }  }\)   
\(\large{ BHP = \frac{ Q \; h_t  \; SG }{ 3960 \; \eta }  }\)  
\(\large{ BHP = \frac{ \tau \; RPM }{ 5252 }  }\)  
\(\large{ BHP = \frac{ WHP }{ \eta_p }  }\)  

Where:

\(\large{ BHP }\) = brake horsepower

\(\large{ Q }\) = flow rate

\(\large{ \eta_{tp} }\)  (Greek symbo; eta) = efficiency

\(\large{ \eta_p }\)  (Greek symbol eta) = pump efficiency

\(\large{ RPM }\) = revolutions per minute

\(\large{ \tau }\)  (Greek symbol tau) = torque

\(\large{ h_t }\) = total head

\(\large{ SG }\) = specific gravity

\(\large{ WHP }\) = water horsepower

 

Tags: Equations for Power Equations for Horsepower