Hydraulic Efficiency

Hydraulic efficiency, abbreviated as \(n_h\), a dimensionless number, is the ratio of hydrodynamic energy in the form of fluid to the amount of mechanical energy delivered to the rotor.

 

Hydraulic Efficiency Formula
\(\large{ n_h = \frac{ Q_a \; 100 }{ Q_t }  }\)
Symbol	English	Metric
\(\large{ n_h }\) = hydraulic efficiency	\(\large{dimensionless}\)
\(\large{ Q_a } \) = actual flow rate output	\(\large{\frac{ft^3}{sec}}\)	\(\large{\frac{m^3}{s}}\)
\(\large{ Q_t }\) = theoretical flow rate	\(\large{\frac{ft^3}{sec}}\)	\(\large{\frac{m^3}{s}}\)