Power = Cp 1/2 ρ A V³


  • P = Power output, watts
  • Cp = Maximum power coefficient, ranging from 0.25 to 0.45, dimension less (theoretical maximum = 0.59)
  • ρ = Air density, kg/m³
  • A = Rotor swept area, m² or
  • π D² / 4 (D is the rotor diameter in m, π = 3.1416)
  • V = Wind speed, mps

How do wind turbines work? Here are some wind turbine facts: Small wind energy systems can be connected to the electricity distribution system and are called grid-connected systems. A grid-connected wind turbine can reduce your consumption of utility-supplied electricity for lighting, appliances, and electric heat. If the turbine cannot deliver the amount of energy you need, the utility makes up the difference. When the wind system produces more electricity than the business requires, the excess is sent or sold to the utility.

Wind Turbine Facts


According to the AWEA Small Wind Turbine Performance and Safety Standard, the Rated Annual Energy of a wind turbine is the calculated total energy that would be produced during a 1-year period with an average wind speed of 5 meters/second (m/s, or 11.2 mph).[1] The following formula illustrates factors that are important to the performance of a wind turbine. Notice that the wind speed (V) has an exponent of 3 applied to it. This means that even a small increase in wind speed results in a large increase in power. That is why a taller tower will increase the productivity of any wind turbine by giving it access to higher wind speeds.


Vortexis will work with your company to build a site specific "wind available" analysis using such tools as AWS True Power (click map of Florida). With data in hand, Vortexis engineers along with decision makers at your company can determine the perfect customized solution.