ALL SKY MODEL FOR SKY LUMINANCE DISTRIBUTION OF ALL SKY CONDITIONS : A study on classification method of sky luminance distribution Part 3

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  • IGAWA Norio
    Research & Development Institute, Takenaka Corp.
  • NAKAMURA Hiroshi
    Faculty of Human Life and Environmental Science, Kochi Women's University
  • KOGA Yasuko
    Graduate School of Human-Environment Studies, Kyushu University
  • KOJO Shinya
    Architecture Dept., West Japan Engineering Consultants
  • FUJII Shunichi
    Dept. of Architecture, Faculty of Engineering, Kyushu University

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Other Title
  • 全ての天空状態の天空輝度分布を表す全天型天空輝度分布モデル : 天空輝度分布の分類法の研究(その3)
  • スベテ ノ テンクウ ジョウタイ ノ テンクウ キド ブンプ オ アラワス ゼ

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Description

The sky luminance distribution is the most basic data for the design of indoor daylight environment. There is not suitable data based on the measurement which shows the sky luminance distributions of all sky conditions. Sky luminance distributions are measured only at the few areas in the world. It is necessary to estimate sky luminance distributions by the measured or calculated value except the data of sky luminance distributions. The measured sky luminance distributions were analyzed with the function of the normalized global illuminance. A numerical equation, which shows the relative sky luminance distributions from the clear sky to the overcast sky named "All Sky Model", was obtained. The detailed descriptions on the method and equations are given in this paper.

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