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Airflow Characteristics According to the Change in the Height and Porous Rate of Building Roofs for Efficient Installation of Small Wind Power Generators

Author

Listed:
  • Jangyoul You

    (Department of Architecture Engineering, Songwon University, Gwangju 61756, Korea)

  • Kipyo You

    (Department of Architecture Engineering, Jeonbuk National University, Jeonju 54896, Korea)

  • Minwoo Park

    (Department of Architecture Engineering, Jeonbuk National University, Jeonju 54896, Korea)

  • Changhee Lee

    (Department of Mechanical and Shipbuilding Convergence Engineering, Pukyong National University, Busan 48547, Korea)

Abstract

In this paper, the air flow characteristics and the impact of wind power generators were analyzed according to the porosity and height of the parapet installed in the rooftop layer. The wind speed at the top was decreasing as the parapet was installed. However, the wind speed reduction effect was decreasing as the porosity rate increased. In addition, the increase in porosity significantly reduced turbulence intensity and reduced it by up to 40% compared to no railing. In the case of parapets with sufficient porosity, the effect of reducing turbulence intensity was also increased as the height increased. Therefore, it was confirmed that sufficient parapet height and high porosity reduce the effect of reducing wind speed by parapets and significantly reducing the turbulence intensity, which can provide homogeneous wind speed during installation of wind power generators.

Suggested Citation

  • Jangyoul You & Kipyo You & Minwoo Park & Changhee Lee, 2021. "Airflow Characteristics According to the Change in the Height and Porous Rate of Building Roofs for Efficient Installation of Small Wind Power Generators," Sustainability, MDPI, vol. 13(10), pages 1-22, May.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:10:p:5688-:d:557566
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    References listed on IDEAS

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    1. Abohela, Islam & Hamza, Neveen & Dudek, Steven, 2013. "Effect of roof shape, wind direction, building height and urban configuration on the energy yield and positioning of roof mounted wind turbines," Renewable Energy, Elsevier, vol. 50(C), pages 1106-1118.
    2. Ledo, L. & Kosasih, P.B. & Cooper, P., 2011. "Roof mounting site analysis for micro-wind turbines," Renewable Energy, Elsevier, vol. 36(5), pages 1379-1391.
    3. Lu, Lin & Ip, Ka Yan, 2009. "Investigation on the feasibility and enhancement methods of wind power utilization in high-rise buildings of Hong Kong," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(2), pages 450-461, February.
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