 An experimental test of the empirical formulae commonly used to represent wind speed profiles near the groundJohn D. Pneumatikos Renewable Energy, 1991, vol. 1, issue 5, 623-628 Abstract: The search for viable alternative energy sources has led to many surveys of wind power resources using wind data at a single reference height (usually 10 m). However, wind speed data must be expressed at the height range of 16–30 m which is the hub height of most operating WECS. The accuracy of different methods (power law, logarithmic, log-linear) for extrapolating wind speed at WECS hub height is investigated. Wind speed and temperature profiles from a 32 m tower have been used to provide the data set needed for this study. Terrain characteristics of the area around the tower have a mean roughness parameter of 34 cm. Power law exponents, for a wide range of stability cases, have a mean value of 0.33 and diverge considerably from the traditional 17 exponent. The log-linear relation reproduces up to 87% the wind speed at hub height. On the contrary, when the reference level is at least an order of magnitude higher than the roughness elements of the surrounding area, the power law reproduces the hub height wind speed in 68–82% of the cases. Date: 1991 Downloads: (external link) Related works: Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:1:y:1991:i:5:p:623-628 DOI: 10.1016/0960-1481(91)90006-B Access Statistics for this article Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides More articles in Renewable Energy from Elsevier |
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