Mechanical Efficiency of Pump or Fan Examples, Formula and Calculator

By Prof. Fazal Rehman Shamil
Last modified on May 27th, 2019

Mechanical Efficiency of Pump or Fan Examples, Formula and Calculator

Power Transferred From the Motor to the Shaft (P)
Power Lost in the Transmission (Pl)
Mechanical Efficieny (ηm)

Formula of Mechanical Efficiency of Pump or Fan

ηm = (P – Pl) / P

Where,
ηm = Mechanical Efficiency of Pump or Fan
P = Power Transferred from the Motor to the Shaft
Pl = Power Lost in the Transmission

Example of Mechanical Efficiency of Pump or Fan Examples, Formula and Calculator – Example 1

Power Transferred From the Motor to the Shaft (P) = 24

Power Lost in the Transmission (Pl) = 20

find Mechanical Efficieny (ηm) = ?

Solution :


Mechanical Efficieny (ηm) = (24-20)/24

Mechanical Efficieny (ηm) = 0.1666

Example of Mechanical Efficiency of Pump or Fan Examples, Formula and Calculator – Example 2

Power Transferred From the Motor to the Shaft (P) = 44

Power Lost in the Transmission (Pl) = 40

find Mechanical Efficieny (ηm) = ?

Solution :

Mechanical Efficieny (ηm) = (44-40)/44

Mechanical Efficieny (ηm) = 0.09090

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