Abstract
Roof mounting wind turbine (RMWT) is a promising form of wind energy utilization in urban environment. According to the International Energy Agency wind task 27, a recommended practice on micrositing of small wind turbines in the areas of high turbulence needs to be formulated. A computational fluid dynamics (CFD) study on the wind turbulence characteristics over the Engineering and Technology Building (ETB) on campus based on the urban atmospheric boundary layer (UABL) inflow condition is conducted, and the results are validated by wind lidar measurements. The micrositing method of RMWT is developed based on the CFD simulations, which contains preliminary and accurate micrositings. Results from this investigation suggest that the optimum installation height ranges from 1.51 to 1.79 times the height of building and the best locations are at the forefront where the wind acceleration reaches the maximum, as the wind direction varies. The methods developed in this paper can provide a feasible scheme for micrositing of RMWTs in urban environment and the results can also serve as a recommendation to this topic.
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