Brake Horsepower

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

 

Brake Horsepower formula
\(\large{ BHP = \frac{ Q \; h_t  \; SG }{ 3960 \; \eta }  }\)
Symbol	English	Metric
\(\large{ BHP }\) = brake horsepower	\(\large{\frac{lbf-ft}{sec}}\)	\(\large{\frac{Btu}{s}}\)
\(\large{ Q }\) = flow rate	\(\large{\frac{ft^3}{sec}}\)	\(\large{\frac{m^3}{s}}\)
\(\large{ \eta }\)  (Greek symbo; eta) = efficiency	\(\large{dimensionless}\)
\(\large{ h_t }\) = total head	\(\large{ft}\)	\(\large{m}\)
\(\large{ SG }\) = specific gravity	\(\large{dimensionless}\)