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| Titel |
The influence of humidity fluxes on offshore wind speed profiles |
| VerfasserIn |
R. J. Barthelmie, A. M. Sempreviva, S. C. Pryor |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 5 ; Nr. 28, no. 5 (2010-05-03), S.1043-1052 |
| Datensatznummer |
250016825
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| Publikation (Nr.) |
 copernicus.org/angeo-28-1043-2010.pdf |
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| Zusammenfassung |
| Wind energy developments offshore focus on larger turbines to keep the
relative cost of the foundation per MW of installed capacity low. Hence
typical wind turbine hub-heights are extending to 100 m and potentially
beyond. However, measurements to these heights are not usually available,
requiring extrapolation from lower measurements. With humid conditions and
low mechanical turbulence offshore, deviations from the traditional
logarithmic wind speed profile become significant and stability corrections
are required. This research focuses on quantifying the effect of humidity
fluxes on stability corrected wind speed profiles. The effect on wind speed
profiles is found to be important in stable conditions where including
humidity fluxes forces conditions towards neutral. Our results show that
excluding humidity fluxes leads to average predicted wind speeds at 150 m
from 10 m which are up to 4% higher than if humidity fluxes are included,
and the results are not very sensitive to the method selected to estimate
humidity fluxes. |
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