Fan Efficiency
Fan efficiency, abbreviated as \(\eta_f\) (Greek symbol eta), is the ratio of input and output power.
Fan Efficiency formula
\(\large{ \eta_f = \frac{ P_{out} }{ P_{in} } }\) |
Where:
\(\large{ \eta_f }\) (Greek symbol eta) = fan efficiency
\(\large{ P_{in} }\) = input power (watt)
\(\large{ P_{out} }\) = output power output (watt)
\(\large{ I }\) = current
\(\large{ V }\) = volt
\(\large{ p }\) = air pressure (\(inch\; H_2 O\))
\(\large{ Q }\) = air flow (cfm)
Solve for:
\(\large{ P_{in} = V \; I }\)
\(\large{ P_{out} = \frac{ p \; Q }{ 8.5 } }\)
Tags: Equations for Efficiency