Saarblitz, Wind farm in HDR,, creative commons by-nc-sa 2.0

IEA Task 31 "Wakebench" extension approved for three more years

The first phase of the IEA Task 31 "Wakebench" finished on October 2014. A proposal to extend the Task for three more years was approved by the IEA-Wind Executive Committe.

The model evaluation framework developed throughout Task 31 for microscale wind farm flow models will be generalized to mesoscale and near-wake models in order to cover all the relevant atmospheric scales related to wind power meteorology. This will allow a more comprehensive approach to the wind farm integrated design process, facilitating the exchange of knowledge among various research communities: meteorologists, resource/site wind engineers and wind farm/rotor aerodynamicists. The focus will still be placed on wind resource/site assessment and wind farm design but allowing for a larger variety of modeling approaches. Some benchmarks will also be explored in finer detail to better quantify the uncertainty of a range of models for different phenomena.

Following Task 31 working procedures, the work will be organized around model intercomparison benchmarks, established around well-defined test cases from research and industrial measurement campaigns. Uncertainty quantification on wind assessment will be considered as the final outcome of the model evaluation process. As a result a framework for model verification, validation and uncertainty quantification (VV&UQ) will be defined as a new edition of the Model Evaluation Protocol (MEP) delivered in Task 31 and integrated in the web portal.

The extension of Task 31, still called WAKEBENCH will be titled ” VV&UQ of Wind Farm Flow Models”. The kick-off meeting is scheduled on the 11th of June 2015 just after the Wake Conference 2015 hosted by Upsala University in Gotland, Sweden.