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

Jangyoul You, Kipyo You, Minwoo Park and Changhee Lee
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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

Sustainability, 2021, vol. 13, issue 10, 1-22

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.

Keywords: small wind power generator; rooftop layer; urban area; turbulent intensity; UDF (user-defined function) (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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