Wind turbines
Electric wind turbines

The wind rose is a polar diagram that shows wind speed and direction over the period of record. Three elements are displayed (figure 5 ):

• the percentage of the total time during which the wind blows in a given direction (indicated by the light blue sectors);

• the percentage of total energy per sector (represented by the dark blue sectors). This indicates which direction provides the most energy;

• the average turbulence intensity per sector, represented by a number displayed on each sector.