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Wind NI | Park Effect

Advice Section

Park Effect

Posted on: November 3rd, 2008
As with the wake effect , each wind turbine will slow down the wind behind it as it pulls energy out of the wind and converts it to electricity.
Ideally, we would therefore like to space turbines as far apart as possible in the prevailing wind direction. On the other hand, land use and the cost of connecting wind turbines to the electrical grid would tell us to space them closer together.
Park Layout

As a rule of thumb, turbines in wind parks are usually spaced somewhere between 5 and 9 rotor diameters apart in the prevailing wind direction, and between 3 and 5 diameters apart in the direction perpendicular to the prevailing winds.

Energy Loss from the Park Effect
With knowledge of the wind turbine rotor, the wind rose , the Weibull distribution and the roughness in the different directions manufacturers or developers can calculate the energy loss due to wind turbines shading one another.
Typically, the energy loss will be somewhere around 5 per cent.