# Wind Turbine Power Generator Equation Formulas Design Calculator

Windmill - Renewable Energy - Clean Electricity - Green Home - Solar Power

Solving for gearbox bearing efficiency.
Scroll to the bottom to see typical input values for the variables.

## Inputs:

wind power (P)
air density (ρ)
rotor swept area (A)
coefficient of performance (Cp)
unitless
wind velocity (V)
generator efficiency (Ng)
unitless

## Conversions:

wind power (P)
= 0
= 0
watt
air density (ρ)
= 0
= 0
kilogram/meter^3
rotor swept area (A)
= 0
= 0
meter^2
coefficient of performance (Cp)
= 0
= 0
wind velocity (V)
= 0
= 0
meter/second
generator efficiency (Ng)
= 0
= 0

## Solution:

gear box bearing efficiency (Nb)
= NOT CALCULATED

## Other Units:

Change Equation
Select 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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By Jimmy Raymond

Contact: aj@ajdesigner.com