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An Original Approach Combining CFD, Linearized Models, and Deformation of Trees for Urban Wind Power Assessment

Author

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  • Jan Konopka

    (Department of Climatology and Environmental Meteorology, Institute of Geoecology, Technical University of Braunschweig, 38106 Braunschweig, Germany)

  • António Lopes

    (Institute of Geography and Spatial Planning, Center of Geographical Studies (ZEPHYRUS/Climate Change and Environmental Systems Research Group), Universidade de Lisboa. Ed. IGOT, R. Branca Edmée Marques, 1600-276 Lisbon, Portugal)

  • Andreas Matzarakis

    (Faculty of Environmental Sciences and Natural Resources, Albert-Ludwigs-University Freiburg, 79085 Freiburg, Germany
    Research Center Human Biometeorology, German Meteorological Service, 79104 Freiburg, Germany)

Abstract

Wind energy is relevant to self-sufficiency in urban areas, but the accuracy of wind assessment is a barrier to allowing wind energy development. The aim of this work is to test the performance of the Griggs-Putnam Index of Deformity of trees (G-PID) over urban areas as an alternative method for assessing wind conditions. G-PID has been widely used in open terrains, but this work is the first attempt to apply it in urban areas. The results were compared with CFD simulations (ENVI-met), and finally, with the linear model WAsP to inspect if deformed trees can offer acceptable wind power assessments. WAsP (meso-) and ENVI-met (micrometeorological model) showed similar results in a test area inside the University of Lisbon Campus. All trees showed a deformation with the wind direction (S and SE). The mean G-PID wind speed for all trees was 5.9 m/s. Comparing this to the ENVI-met simulations results (mean speed for all trees was 4.25 m/s) made it necessary to adapt the index to urban terrains by reducing each Index Deformation class by about ~2 m/s. Nevertheless, more investigation is needed, since this study is just a first approach to this integrated methodology. Also, tree species and characteristics were not taken into account. These questions should be addressed in future studies, because the deformation of trees depends also on the tree species and phytosanitary conditions.

Suggested Citation

  • Jan Konopka & António Lopes & Andreas Matzarakis, 2018. "An Original Approach Combining CFD, Linearized Models, and Deformation of Trees for Urban Wind Power Assessment," Sustainability, MDPI, vol. 10(6), pages 1-24, June.
    • Handle: RePEc:gam:jsusta:v:10:y:2018:i:6:p:1915-:d:151269
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    References listed on IDEAS

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    1. Krohn, Søren & Damborg, Steffen, 1999. "On public attitudes towards wind power," Renewable Energy, Elsevier, vol. 16(1), pages 954-960.
    2. Simões, Teresa & Estanqueiro, Ana, 2016. "A new methodology for urban wind resource assessment," Renewable Energy, Elsevier, vol. 89(C), pages 598-605.
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    Cited by:

    1. Chih-Chun Kung & Bruce A. McCarl, 2018. "Sustainable Energy Development under Climate Change," Sustainability, MDPI, vol. 10(9), pages 1-4, September.
    2. Akintayo T. Abolude & Wen Zhou, 2018. "A Comparative Computational Fluid Dynamic Study on the Effects of Terrain Type on Hub-Height Wind Aerodynamic Properties," Energies, MDPI, vol. 12(1), pages 1-14, December.

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