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Computation 2015, 3(2), 299-325; doi:10.3390/computation3020299

On Roof Geometry for Urban Wind Energy Exploitation in High-Rise Buildings

1
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), Av. Complutense 40, Madrid 28040, Spain
2
Escuela Técnica Superior de Ingenieros Aeronáuticos, Universidad Politécnica de Madrid (UPM), Madrid 28040, Spain
3
Fraunhofer IWES, Ammerlaender Heerstrasse 136, Oldenburg 26129, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Manfred Krafczyk
Received: 29 April 2015 / Revised: 27 May 2015 / Accepted: 4 June 2015 / Published: 10 June 2015
(This article belongs to the Special Issue Computational Fluid Dynamics in Civil Engineering)

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
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Toja-Silva, F.; Peralta, C.; Lopez-Garcia, O.; Navarro, J.; Cruz, I. On Roof Geometry for Urban Wind Energy Exploitation in High-Rise Buildings. Computation 2015, 3, 299-325.

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