Field Measurement of the Reflectance of Highly Reflective Roofing Sheets Installed in School Buildings

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  • YUAN Jihui
    Graduate School of Human Life Science, Osaka City University
  • EMURA Kazuo
    Graduate School of Human Life Science, Osaka City University
  • SAKAI Hideki
    Graduate School of Human Life Science, Osaka City University

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  • 学校屋上での高反射防水シートの反射率の測定
  • ガッコウ オクジョウ デ ノ コウハンシャ ボウスイ シート ノ ハンシャリツ ノ ソクテイ

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One of the important measures to be adopted in heat islands is the improvement of urban surface coating. Use of highly reflective materials for the outer walls is an effective way to prevent heat from penetrating the buildings, and nowadays many products with reflective properties have been developed. In this study, we present field measurements conducted in November 2010 and March 2011 in order to evaluate the reflectance of highly reflective roofing sheets installed in actual buildings. We measured the reflectance of highly reflective roofing sheets installed on the top of 20 primary and middle schools in Osaka city. Furthermore, energy savings of the highly reflective roofing sheets were estimated. These energy savings were compared with those of an insulation material.

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