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2018 Building Performance Analysis Conference and SimBuild co-organized by ASHRAE and IBPSA-USA

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Influence of External Shading on Convective Heat Transfer Coefficient for a High-Rise Building

Meseret Kahsay, Girma Bitsuamlak, Fitsum Tariku
University of Western Ontario, Canada
British Columbia Institute of Technology, Burnaby, BC, Canada

Abstract: This paper investigates the impacts of external shadings on the convective heat transfer rate of a high-rise building. The convective heat transfer coefficient (CHTC) is evaluated using highresolution 3D computational fluid dynamics simulations. Thus, as the depth of the shading element increases, reduced values of CHTC were obtained. Except at the horizontal edges of the building locally for horizontal shading elements, and at roof level edges for vertical shading elements. For example, for 1 m deep shading element, CHTC value decreased compared to smooth surface by 13%, 22%, and 46% for a horizontal, a vertical, and an egg-crate forms, respectively.
Pages: 165 - 172
Paper:
simbuild2018_C024