Wind energy is one of the more efficient alternatives to fossil fuel energy. Wind power gives a significant Return On Investment (ROI) since it’s free energy that also has an endless renewable power source. 59% efficiency is the BEST a conventional wind turbine can do in extracting power from the wind.

Wind Power depends on:

• amount of air (volume)
• speed of air (velocity)
• mass of air (density)

flowing through the area of interest (flux)

Kinetic Energy definition:

  • KE = ½ * m * v 2

Power is KE per unit time:

Fluid mechanics gives mass flow rate

(density * volume flux):

  • dm/dt = ρ* A * v


P = ½ * ρ * A * v 3

Betz Limit & Power Coefficient:

  • Power Coefficient, Cp, is the ratio of power extracted by the turbine to the total contained in the wind resource Cp = PT/PW
  • Turbine power output
  • PT = ½ * ρ * A * v 3 * Cp
  • The Betz Limit is the maximal possible Cp = 16/27
  • 59% efficiency is the BEST a conventional wind turbine can do inextracting power from the wind

Write A Comment

We use cookies in order to give you the best possible experience on our website. By continuing to use this site, you agree to our use of cookies.
Privacy Policy