# Wind Turbine Generator Equation Calculator

## Windmill Renewable Energy Clean Electricity Green Home Solar Power Design Formulas

Solving for wind power.
Scroll to the bottom to see typical input values for the variables.

#### Inputs:

 air density (ρ) kilogram/meter^3gram/centimeter^3gram/meter^3gram/milliliterkilogram/deciliterkilogram/litermilligram/literounce/foot^3ounce/inch^3pound/foot^3pound/bushel UKpound/bushel USpound/gallon UKpound/gallon USpound/inch^3pound/yard^3ton metric/meter^3slug/foot^3slug/inch^3
 rotor swept area (A) meter^2acre internationalacre US surveyarebarncentimeter^2foot^2hectareinch^2kilometer^2mile^2micrometer^2millimeter^2mile^2 nauticalnanometer^2pingtownshipyard^2
 coefficient of performance (Cp)
 wind velocity (V) meter/secondcentimeter/hourcentimeter/secondfoot/dayfoot/hourfoot/minutefoot/secondinch/dayinch/hourinch/minuteinch/secondkilometer/daykilometer/hourkilometer/minutekilometer/secondknotmach sea level 15 Cmeter/daymeter/hourmeter/minutemile/daymile/hourmile/minutemile/secondmillimeter/secondspeed of light in vacuumyard/second
 generator efficiency (Ng)
 gear box bearing efficiency (Nb)

#### Conversions:

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

#### Solution:

 wind power (P)= 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