Wake effects in wind farms are smaller than expected, according to a study by the KEMA laboratory in Arnhem after studies of the now obsolete Oosterbierum plant. Yield losses that could be ascribed to wake effects are estimated at just 4%. This is because any disturbance in wind flow disappears quickly and is absorbed in general turbulence. Another reason for the small losses is that the turbines were not placed in line with the prevailing wind, says KEMA, which also says that wake effects do not make wind turbines noisier.
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Senior Renewable Energy Analyst (WindGEMINI Product Lead) DNV GL Bristol (City Centre), City of Bristol