The graph shows the power available from a wind turbine across a range of wind speeds.
Enter the specification of your turbine in the form and see how much power it is possible to generate.
The power from the wind turbine for a given wind speed is calculated using the equation:
The maximum theoretical coefficient of performance or Betz limit is defined as 16/27 or 0.59 although in practice this would not be achievable and a lower value should be used.
The coefficient of performance will typically vary with wind speed. An efficient horizontal axis wind turbine might achieve a value of 0.35.
Some wind turbine efficiency and power output graphs can be found on: