Abstract
For the wind energy assessment, it is important to know the probability density distribution of the wind speed in order to calculate the mean power of a wind. In this study wind data, for the period from January 2000 to December 2002, hourly records of speed and direction at Alexandria coast are analyzed as random monthly observations. Statistical methods are used for determination of best fit random distributions of wind speed and direction using statistical standard software that helps in evaluation of wind speed energy potential in a study area. In the present paper, different theoretical Probability Density Functions (PDF) have been tried to determine the appropriate models, including Weibull distribution and their parameters. The minimum wind power density at Alexandria found in July and August (2000-2002) were 20.41 and 21.34 w/m2 and the maximum was in December and January (110.81 and 123.34 w/m2). The most important distributions of the wind speed were Weibull and Dagum and the direction followed mostly the Johnson SB model.
Highlights
LITERATURE REVIEWThe world energy need increases every year by 45% whereas fossil fuel reserves decrease much faster than the need
Probability distributions of wind velocity: Probability distributions of wind speed: Monthly wind speed for the period of study: The Weibull probability distribution was good for all months of the study period
The wind energy resource assessments are important for sitting the wind turbines
Summary
The world energy need increases every year by 45% whereas fossil fuel reserves decrease much faster than the need. With increasing negative effects of fossil fuels on environment, mainly developed countries and others have begun using renewable energy sources. The fastest developing and most common used energy source is the wind energy. It is a clean and renewable alternative source of energy potential to fossils based energy sources polluting the lower layer atmosphere. Wind energy systems transforming wind power to electrical energy has been developing quite fast (Aras et al, 2003). Alexandria is a rapidly growing energy consumer and the use of renewable energy, such as wind energy will be of great importance as friendly source to environment
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