Wind parks constitute a concentrated way of exploiting wind energy affected to a considerable extend by wake effects. As a consequence, wind turbines operating in clusters will have reduced power output and lifetime.
To investigate the impact of wake effects to the design and performance of wind parks
To develop methods for better designing wind parks
A multi-level research activity has been conducted along the following guidelines:
Near-wake region: A Navier-Stokes solver using the k-å turbulence model gives the velocity field and the turbulence characteristics of the flow over the mixing region of the wake. Input to this are the results of the rotor region.
Far-wake region: A multi-parametric far-wake model based on similarity assumptions is filled so as to get the inflow information further downstream.
WINPPAN : WINd Park Performance Analysis code
It calculates the annual energy output, the individual machine output and the turbulence intensity to every wind turbine of a wind park with respect to the wind rose of the site.
WPDESI : Wind Park DESIgn code
It provides the optimal lay-out of a wind park installed in a specific site for producing maximum annual energy.