ضریب برش باد و تأثیر آن بر تولید انرژی

Generally wind shear coefficient is used to estimate the wind speed at higher elevations, while the local meteorological anemometers monitor one elevation. The well-known equation for estimating wind shear coefficients is a power law. This paper assesses wind shear and its effects on annual energy production from wind speed data on Phangan island, collected from December 2011 to November 2012 at locations 65 and 120 m above ground level (agl). The annual, monthly, and diurnal variations of wind shear coefficient were investigated. The annual energy production was assessed by using the wind turbine power curve. The results show that the difference between wind energy production from extrapolated wind data and the measured energy production may be up to 35%.