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In urban areas, the evaluation of the energy outcome of a horizontal axis micro wind turbine depends on several factors such as mean wind velocity, location, turbulence, etc. To maximize the micro wind turbine efficiency it is important to define the best location. The present paper focuses on the definition of common rules for micro siting in urban areas. In this work, the efficiency of a 1 kWp horizontal-axis wind turbine has been evaluated, by means of CFD and experimental data. The numerical results have been compared with the experimental data collected over a period of time of three years, by using a measurement equipment installed on the roof of the Engineering building at the University of Salento. The results have shown that horizontal axis wind turbines suffer from wake effect due to buildings, therefore best sites in urban area have to be identified by a careful fluid dynamic analysis aimed at evaluating all causes that can reduce significantly the performance of the generator.

Experimental and Fluid-dynamic Analysis of a Micro Wind Turbine in Urban Area