Pump Efficiency Calculation  



Water Horsepowe :
WHP = n*BHP
Brake Horsepower :
BHP = WHP /n
Where,
n = Pump Efficiency,
WHP = Water Horsepower,
BHP = Brake Horsepower.
Example:
Calculate the Pump efficiency for the given details of horsepower.
Water Horsepower (WHP) = 25 HP
Brake Horsepower (BHP) = 20 HP
Solution:
Apply Formula:
n= WHP / BHP
n = 25/20
n = 1.25
Pump Efficiency (n) = 1.25