The mean hourly wind speed in the year of 1997 at the city of Makassar has been analyzed by Weibull distribution. The analysis shows the wind is generally light and irregular and the distribution has a relatively high dispersion, since the values of Weibull parameters: the shape factor k and scale factor c are 1.52 and 4.91 respectively. The average wind speed 4.42 knot (2.27 m/s). The necessary calculations of the output of windmill for water pumping on the basis of wind regime data are explained. From the cost consideration, the price of water supply by windmill is higher than by the electric pump set. It is clear that the use of windmill for water pumping is not attractive as alternative energy utilization.
Keywords: Wind energy, Weibull function, shape and scale factor
