Journal
WIND ENERGY
Volume 19, Issue 4, Pages 651-663Publisher
WILEY
DOI: 10.1002/we.1857
Keywords
wind-energy; turbine spacing; large eddy simulations; top-down model; turbine spacing
Categories
Funding
- research program 'Fellowships for Young Energy Scientists' (YES!) of the Foundation for Fundamental Research on Matter (FOM) - Netherlands Organization for Scientific Research (NWO)
- National Science Foundation [1243482, OCI-1053575]
- LISA cluster of SURFsara in the Netherlands
- Office Of The Director
- Office Of Internatl Science &Engineering [1243482] Funding Source: National Science Foundation
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Recent large eddy simulations have led to improved parameterizations of the effective roughness height of wind farms. This effective roughness height can be used to predict the wind velocity at hub-height as function of the geometric mean of the spanwise and streamwise turbine spacings and the turbine loading factors. Recently, Meyers and Meneveau used these parameterizations to make predictions for the optimal wind turbine spacing in infinitely large wind farms. They found that for a realistic cost ratio between the turbines and the used land surface, the optimal turbine spacing may be considerably larger than that used in conventional wind farms. Here, we extend this analysis by taking the length of the wind farm, i.e.the number of rows in the downstream direction into account and show that the optimal turbine spacing strongly depends on the wind farm length. For small to moderately sized wind farms, the model predictions are consistent with spacings found in operational wind farms. For much larger wind farms, the extended optimal spacing found for infinite wind farms is confirmed. Copyright (c) 2015John Wiley & Sons, Ltd.
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