Water Horsepower

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

Water Horsepower formulas

\(\large{ WHP = \frac{ Q \; h_t }{3960} }\)   
\(\large{ WHP = \eta_p \; BHP  }\)  

Where:

 Units English Metric
\(\large{ WHP }\) = water horsepower \(\large{\frac{lbf-ft}{sec}}\) \(\large{\frac{Btu}{s}}\)
\(\large{ Q }\) = flow rate discharge \(\large{\frac{ft^3}{sec}}\) \(\large{\frac{m^3}{s}}\)
\(\large{ \eta_p }\)  (Greek symbol eta) = pump efficiency \(\large{dimensionless}\)
\(\large{ h_t }\) = total head \(\large{ft}\) \(\large{m}\)

Solve For:

\(\large{ BPH =  \frac{ 100 \; Q \; h_t }{ 3960 \; \eta_p }   }\)  
\(\large{ Q =  \frac{ 3960 \; WHP }{ H }   }\)  
\(\large{ \eta_p =  \frac{ WHP }{ BHP }   }\)  
\(\large{ h_t =  \frac{ 3960 \; WHP }{ Q }   }\)  

 

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Tags: Equations for Water Equations for Horsepower