Wind Turbine Power Generator Equation Formulas Design Calculator

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Solving for generator efficiency.

Scroll to the bottom to see typical input values for the variables.

Inputs:

Conversions:

wind power (P)	=	=	watt
air density (ρ)	=	=	kilogram/meter^3
rotor swept area (A)	=	=	meter^2
coefficient of performance (Cp)	=	=
wind velocity (V)	=	=	meter/second
gear box bearing efficiency (Nb)	=	=

Solution:

generator efficiency (Ng)

HAS NOT BEEN CALCULATED

Other Units:

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Select an equation to solve for a different unknown

	Solve for wind power.
	Solve for air density.
	Solve for swept area of the rotor, propeller or blades.
	Solve for coefficient of performance.
	Solve for wind speed.
	Solve for generator or alternator efficiency.
	Solve for gear box bearing efficiency.

Symbol	Description	Typical values
ρ	air density	1.2 kg/m³ (sea level)
Cp	performance coefficient	0.35 is typical 0.56 is the theoretical maximum known as the Betz limit.
Ng	generator efficiency	50 percent to 80 percent.
Nb	gearbox	95 percent

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