ベネシャンブラインドの分光透過指向特性の算出方法 CALCULATION METHOD FOR SPECTRAL TRANSMITTANCE DIRECTIVITY OF VENETIAN BLINDS

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著者

    • 吉田 悟郎 YOSHIDA Goro
    • 京都大学工学研究科建築学専攻 修士課程 Graduate Student, Dept. of Architecture, Graduate School of Eng., Kyoto University
    • 上谷 芳昭 UETANI Yoshiaki
    • 京都大学工学研究科建築学専攻 准教授・工博 Assoc. Prof., Dept. of Architecture, Graduate School of Eng., Kyoto University, Dr. Eng.

抄録

Venetian blinds are usual devices for controlling daylight admittance. The spectral transmittance of venetian blinds is affected by shapes, reflective properties of the slats, and the direction of incident light. We incorporate these factors into a method for calculating the spectral transmittance directivity of the blind. The slats are assumed to be arcs on a two-dimensional cross section, which constitutes a Lambertian surface of negligible thickness. The spectral irradiance distributions on the slats and virtual elements in optical directions are calculated by two-dimensional spectral interreflection. The spectral irradiance distributions are then transformed into a three-dimensional spectral BTDF<sub>λ</sub>. The BTDF<sub>λ</sub> and transmittance are determined from the incident direction of the direct radiation and the blind geometry. Using the proposed method, we can calculate the spectral irradiance distributions of rooms shaded by venetian blinds. The result shows quantitatively that the spectral reflective properties and angles of the slats affect the spectral transmittance directivity of the blinds and spectral irradiance distributions of the room.

収録刊行物

  • 日本建築学会環境系論文集

    日本建築学会環境系論文集 79(705), 937-945, 2014

    日本建築学会

各種コード

  • NII論文ID(NAID)
    130004706062
  • NII書誌ID(NCID)
    AA11830377
  • 本文言語コード
    JPN
  • ISSN
    1348-0685
  • NDL 記事登録ID
    025902996
  • NDL 請求記号
    Z74-D484
  • データ提供元
    NDL  J-STAGE 
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