The necessary distance between large wind farms offshore - study

S. Frandsen, R.J. Barthelmie, S.C. Pryor, Ole Rathmann, Søren Ejling Larsen, Jørgen Højstrup, P. Nielsen, M.L. Thøgersen

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    Abstract

    A review of state of the art wake and boundary layer wind farms was conducted. The predictions made for wind recovery distances (that might be used to estimate optimal placing of neighbouring wind farms) range between 2 and 14 km. In order to model thelink between wakes and the boundary layer the new Storpark Analytical Model has been developed and evaluated. As it is often the need for offshore wind farms, the model handles a regular array-geometry with straight rows of wind turbines and equidistantspacing between units in each row and equidistant spacing between rows. Firstly, the case with the flow direction being parallel to rows in a rectangular geometry is considered by defining three flow regimes. Secondly, when the flow is not in line withthe main rows, solutions are found for the patterns of wind turbine units emerging corresponding to each wind direction. The model complex will be adjusted and calibrated with measurements in the near future.
    Original languageEnglish
    Number of pages29
    ISBN (Print)87-550-3447-0
    Publication statusPublished - 2005
    SeriesDenmark. Forskningscenter Risoe. Risoe-R
    Number1518(EN)
    ISSN0106-2840

    Keywords

    • Risø-R-1518
    • Risø-R-1518(EN)

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