Aiming at the influence of building shapes on micro-siting selection of wind turbines on building roof, turbulent characteristics of wind on roof of buildings with four different shapes are studied by using CFD. The sensitivity analysis of the building shape on wind direction is carried out, and wind speed and turbulence intensity at the top of buildings are analyzd. The results show that buildings with round curve shapes are more favorable for installation wind turbines, which can be installed at a lower height. Meanwhile the long axis of the building is closer to the short axis, roofs of the building is more favorable for installation wind turbine. When install the wind turbine on the top of buildings with four shapes, the favorable installation height with U/U0≥1 can ensure the effective output power and operation safety of the wind turbine. In the absence of prevailing wind direction, the lowest center of buildings with four shapes is beneficial for installation wind turbines, while the installation height is the lowest. Hence, the lowest installation height of wind turbines in the center of the cylinder, ellipsoid, cube and cuboid buildings is 1.05H,1.09H,1.11H and 1.14H, respectively.
Key words
building /
wind turbines /
turbulence /
wind speed /
micro-siting selection
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