Wind Farm Flow Modeling: Including Atmospheric Stability

Wind farm site assessments have traditionally ignored the effect of atmospheric stability on wind power predictions. However, as commercial pressures push developers to consider more difficult sites where atmospheric stability can have a strong influence on the flow, it is becoming increasingly clear that including stability can significantly increase the accuracy of the assessments and estimates of the Return On Investment (ROI). This webinar considers:
  • • What is atmospheric stability and how does it affect the flow over a wind farm site;
  • • How atmospheric stability can be studied using CFD;
  • • What data is needed to include stability in a model; and
  • • What are the benefits from including atmospheric stability.

These aspects are illustrated by results from real projects using WindModeller, and include:
  • • The role of free stream stability and how it affects the boundary layer development;
  • • The effect of ground heating and cooling, including diurnal and seasonal variations;
  • • Wake effects;
  • • The effects of terrain, especially away from hill tops; and
  • • How stability influences wind shear and turbine selection.