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wakes and blockage

The importance of taking into account wake and blockage effects when assessing wind farm energy production.

A scheme of the wake and blockage effect. The first turbine disrupts the airflow, so the second turbine will have a lower power output and more turbulence. The blockage produces a deceleration of the flow upstream of the turbine.

Mean Wind Speed maps for the Regular simulation (left) and the Fitch Wakes simulation (right) for a 400 squared kilometers region where there is a wind farm. The Fitch Scheme decreases the predicted wind speed up to a 13% in the center of a wind farm.