The main target of this paper is to determine the seasonal features of the wind speed in
the northwestern of Senegal and to assess the cost of annual energy output using wind
turbines provided from several manufactures. The wind data used for this study were
collected in four sites located in the northwestern coast of Senegal and cover the period
of one year. The seasonal mean wind speed and the annual distribution curves were obtained
by using the Weibull distribution function. A technical assessment of electricity
generation from five big wind turbines which power is between 640 kW and 2000 kW and from
six small wind turbines which power is between 250 W and 10 kW were carried out. The
results obtained show that the lower cost (0.0265 €/kWh in Sokhar) was observed for the
wind turbine Ecotècnia 62. The highest cost was 0.5103 €/kWh (in Gandon) observed for the
technology of Alize. All wind turbines was better suited to the site of Sokhar with the
highest capacity factor and the lowest cost of output energy.