Wake Losses

The space behind a wind turbine that is marked by decreased wind power capacity due to the fact that the turbine itself used the energy in turning the blades. The wind behind the turbine, in its wake, is less effective at generating energy for a certain distance in the downwind direction due to turbulence created by the upwind machine. Thus, when siting a wind farm, it is important to space turbines as to minimize the impact each has on the others’ power production capacity, taking into account additional costs for laying of electrical cable and other infrastructure required when machines are spaced further apart.