# Wind Turbine Power Generator Equation Formulas Design Calculator

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

Solving for generator efficiency.

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

#### Inputs:

 wind power (P) watt foot-pound/second horsepower joule/second kilojoule/second kilowatt newton-meter/second air density (ρ) kilogram/meter^3 gram/centimeter^3 gram/meter^3 milligram/liter pound/foot^3 rotor swept area (A) meter^2 acre international acre US survey are barn centimeter^2 foot^2 hectare inch^2 kilometer^2 mile^2 mile^2 nautical ping township yard^2 coefficient of performance (Cp) wind velocity (V) meter/second centimeter/hour centimeter/second foot/day foot/second inch/hour inch/second kilometer/hour kilometer/second knot mach sea level 15 C meter/day mile/hour mile/second millimeter/second speed of light in vacuum yard/second gear box bearing efficiency (Nb)

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#### 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 gear box bearing efficiency (Nb) = 0 = 0

#### Solution:

 generator efficiency (Ng) = HAS NOT BEEN CALCULATED

#### Other Units:

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 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

by Jimmy Raymond