Evaluation of Urban/Built Environment Improving Effects of the Watering System for Cooling Photocatalyst-coated External Surfaces of Buildings : Part 1-A Numerical Analysis Method for the Evaluation

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  • HE Jiang
    Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
  • HOYANO Akira
    Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology

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  • 光触媒外装建材を用いた蒸発冷却システムの都市・建築熱環境改善効果 : 第1報-数値シミュレーションによる評価手法に関する検討
  • ヒカリ ショクバイ ガイソウ ケンザイ オ モチイタ ジョウハツ レイキャク システム ノ トシ ケンチク ネツ カンキョウ カイゼン コウカ ダイ 1ポウ スウチ シミュレーション ニ ヨル ヒョウカ シュホウ ニ カンスル ケントウ

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Abstract

This paper presents a numerical analysis on the effects of urban and built thermal environment improvements for a cooling system to cool the photocatalyst-coated external surfaces of buildings. The authors proposed a thermal model to predict temperature of the photocatalyst-coated surface covered with water film, and integrated the calculation algorithm into the outdoor thermal environment simulation tool developed by the authors. An urban area in the downtown of Tokyo was selected for analysis. Simulations were performed to evaluate the potential impacts of the cooling system on the outdoor and indoor thermal environment improvements in terms of surface temperature distributions, mean radiative temperature (MRT), the heat island potential (HIP), indoor air temperature and cooling load.

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