부산대학교 도서관

The wind turbines installed in Baekado barely produce power because of the improper wind resource assessment that ignored complex terrain effects. This research proposes a proper wind resource assessment method for a small wind turbine siting based on the Numerical Weather Prediction (NWP) data to Computational Fluid Dynamics (CFD) downscaling. For this, wind speed data from the NWP should be imposed at the boundary layer top where it is far from the local terrain effect, but wind direction data at the ground level from NWP is used considering the wind veer shift. A micrositing wind map produced by NWP-CFD downscaling clearly showed that the current wind farm location at the basin is covered by the separate flow along the steep upslope on the windward side. Consequently, poor a wind resource was inevitable. The present prediction suggested a similar wind speed and capacity factor at the site. For reliable wind resource assessment of small wind turbines, it is important to apply an NWP-CFD downscaling method demonstrated in this research.