On Roof Geometry for Urban Wind Energy Exploitation in High-Rise BuildingsReport as inadecuate




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1

Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas CIEMAT, Av. Complutense 40, Madrid 28040, Spain

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Escuela Técnica Superior de Ingenieros Aeronáuticos, Universidad Politécnica de Madrid UPM, Madrid 28040, Spain

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Fraunhofer IWES, Ammerlaender Heerstrasse 136, Oldenburg 26129, Germany





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Author to whom correspondence should be addressed.



Academic Editor: Manfred Krafczyk

Abstract The European program HORIZON2020 aims to have 20% of electricity produced by renewable sources. The building sector represents 40% of the European Union energy consumption. Reducing energy consumption in buildings is therefore a priority for energy efficiency. The present investigation explores the most adequate roof shapes compatible with the placement of different types of small wind energy generators on high-rise buildings for urban wind energy exploitation. The wind flow around traditional state-of-the-art roof shapes is considered. In addition, the influence of the roof edge on the wind flow on high-rise buildings is analyzed. These geometries are investigated, both qualitatively and quantitatively, and the turbulence intensity threshold for horizontal axis wind turbines is considered. The most adequate shapes for wind energy exploitation are identified, studying vertical profiles of velocity, turbulent kinetic energy and turbulence intensity. Curved shapes are the most interesting building roof shapes from the wind energy exploitation point of view, leading to the highest speed-up and the lowest turbulence intensity. View Full-Text

Keywords: building aerodynamics; CFD; CWE; OpenFOAM; RANS; urban wind energy building aerodynamics; CFD; CWE; OpenFOAM; RANS; urban wind energy





Author: Francisco Toja-Silva 1,2,* , Carlos Peralta 3, Oscar Lopez-Garcia 2, Jorge Navarro 1 and Ignacio Cruz 1

Source: http://mdpi.com/



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