STRONG WIND AT SEA

Windpower is proportional to the cube of wind speed (P = ½ ρAV3). Thus, a modest increase in mean wind speed can translate to a large increase in annual electricity production. For example, at the height of 50 meters over Denmark, the annual mean wind velocities are 9 m/s over large regions of Danish North Sea (see Exhibit-1, in red color), which are 50% higher than those on land (6 m/s; see Exhibit-1, in green color). Therefore, over these regions, the same wind turbine can produce 3.375 [= (9/6)3] times the electricity at sea than on land!


Exhibit-1:
A wind velocity map over Denmark at the height of 50 meters, on land and offshore (by Danish Energy Authority). Deep red color: 9 meters/sec Green color: 6 meters/second.
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Exhibit-2:
Wind speed profile difference between on land and at sea. CLICK TO ENLARGE

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