Principal Atmospheric Scientist/CEO ArcVera Renewables
Presentation Description: A series of wake and first row-blockage studies are used to underpin and discuss a paradigm shift in how wind farm interaction with the once free stream pre-construction atmosphere are estimated in the atmosphere. Wind Farm-Atmosphere Interaction (WFAI) losses are the target of the discussion, with a particular emphasis on unforeseen impacts of large rotor diameters and tall tip heights.
This presentation will describe the results of pre- versus post-construction wind farm analyses using standard “first row as 100% production reference” wake loss validation and also contrast that with unwaked, unblocked theoretical energy as the 100% production reference wake loss validation. The implications of this simple change are fundamental in assessing what we call wake loss models.
We find that no longer can wake loss models be considered so simply and that blockage is only part of a larger view of WFAI.
In the discussion we will recast the “wake” version of wind farm losses from gross energy into the Wind Farm-Atmosphere Interaction (WFAI) paradigm. This entertaining re-thinking of traditional approaches to wake loss modeling relies on fundamental atmospheric physics, observations at wind farms, and numerical modeling - and leads to serious implications for wind energy resource assessment in an era of very large rotor diameter turbines. The presentation will touch on the tantalizing concept of fundamental changes to wind flow patterns simply erecting a wind farm in an atmospherically sensitive location.
This presentation will describe a path for WFAI modeling at commercial pace today and a view to the future of high-fidelity modeling of WFAI of individual wind farms and their long-distance neighbors.
Methodology: Instructive diagrams and/or videos to illustrate the WFAI concept and blockage, acceleration, and wakes.