In this paper, the 10-minutes period measured wind speed data at different heights (10 m, 30 m, and 40 m) are presented for Khvaf, which is one of the major counties with high wind potential in Khorasan provinces in Iran. To the author’s knowledge, there hasn’t been any assessment works in the mentioned site. From the primary evaluation and by determining mean wind speed and also the Weibull fu...

Relative humidity (RH) measurements, as derived from wet-bulb and dry-bulb thermometers operated as a psychrometer within a thermometer screen, have limited accuracy because of natural ventilation variations. Standard RH calculations generally assume a fixed screen psychrometer coefficient, but this is too small during poor ventilation. By comparing a reference humidity probe—exposed within a s...

Wind flow over the airfoil surface is adversely affected by differences between design and ambient values of a dimensionless quantity called Reynolds number. turbine designed for high Number shows lower maximum power performance when installed in low-speed wind regime. Tanzanian experience that some imported modern turbines depict compared to drag-type locally manufactured turbines. The most pr...

Of the various renewable energy resources, wind power is widely recognized as one of the most promising. The management of wind farms and electricity systems can benefit greatly from the availability of estimates of the probability distribution of wind power generation. However, most research has focused on point forecasting of wind power. In this paper, we develop an approach to producing dens...

Global crisis in financial, energy, together with climate and enviromental, has motivated word community to seek for alternative energy resourses, known as the new and renewable energy source to replace conventional widely used fossil energy. Wind energy, regarded as potential candidate of the clean alternative source that may help to solve the crisis. The development of the world’s wind turbin...

wind speed is one of the major parameters required for an estimation of evapotranspiration and determination of crop water requirements. hence, several models and methods have been developed for a prediction of this needed climatic variable. in recent years, by development of soft computing tools, such intelligent systems as artificial neural network (ann) approach have been widely employed in ...