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Vertical Profile of Wind Speed in the Atmospheric Boundary Layer and Assessment of Wind Resource on the Bobo Dioulasso Site in Burkina Faso

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Smart Grid and Renewable Energy 2019年第11期10卷 257-278页

作者： drissa boro Hagninou Elagnon Venance Donnou Imbga Kossi Nebon Bado Florent P. Kieno Joseph Bathiebo Laboratoire d’Energies Thermiques Renouvelables (L.E.T.RE) Université Joseph KI-ZERBO Ouagadougou Burkina Faso Laboratoire de Physique du Rayonnement (LPR) Faculté des Sciences et Techniques (FAST) Université d’Abomey-Calavi Cotonou Benin

This study investigates both the characteristics of the vertical wind profile at the Bobo Dioulasso site located in the Sudanian climate zone in Burkina Faso during a day and night convective wind cycle and the estimation and variability of the wind resource. Wind data at 10 m above ground level and satellite data at 50 m altitude in the atmospheric boundary layer were used for the period going from January 2006 to December 2016. Based on Monin-Obukhov theory, the logarithmic law and the power law made it possible to characterize the wind profile. On the study site, the atmosphere is generally unstable from 10:00 to 18:00 and stable during the other periods of the day. Wind extrapolation models were tested on our study site. Fitting equations proposed are always in agreement with the data, contrary to other models assessed. Based on these equations, the profile of a day and night cycle wind cycle was established by extrapolation of wind data measured at 10 m above the ground. Lastly, the model of the power law based on the stability was used to generate data on wind speed from 20 m to 50 m based on data from 10 m above the ground. Weibull function was used to characterize wind speed rate distribution and to calculate wind energy potential. The average annual power density on the site is estimated at 53.13 W/m2 at 20 m and at 84.05 W/m2 at 50 m, or 36.78% increase. Considering these results, the Bobo-Dioulasso site could be appropriate to build small and medium-size turbines to supply the rural communities of the Bobo Dioulasso region with electricity.

关键词： Wind Potential Weibull Distribution Power Density Vertical Profil Vertical

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