Wind Turbine Power Generator Equation Formulas Design Calculator

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Problem:

Solve for generator efficiency.

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

Enter Calculator Inputs:

wind power (P)

air density (ρ)

rotor swept area (A)

coefficient of performance (Cp)

unitless

wind velocity (V)

gear box bearing efficiency (Nb)

unitless

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Solution:

Enter input values and press Calculate.

Solution In Other Units:

Enter input values and press Calculate.

Input Unit Conversions:

Enter input values and press Calculate.

Change Equation or Formulas:

Tap or click to solve for a different unknown or equation

	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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By Jimmy Raymond

Contact: aj@ajdesigner.com