再帰性反射体の基本特性に関する数値実験: 再帰反射を用いた日射反射体の性能評価

摘要

ヒートアイランド現象の抑制対策として，また夏季に建物の冷房 負荷の要因となる日射侵入を抑制する対策として，建物屋根面や壁 面の日射反射率を高め日射吸収を低減させる技術が注目されるよう になり，高反射性塗装を用いた対策が普及し始めている。%This paper aims at developing the solar-radiation reflector with retroreflective abilities, in order to aim at reduction of urban heat island effects, and building cooling loads of a summer season. However, although retroreflectors have some researches which should be referred to in the aspect of visibility, the knowledge on solar-radiation reflection is not accumulated. This is because the general purposes of the retroreflectors are reflecting plates, such as a road sign. Therefore, in this study, the numerical simulation which used the ray tracing method performed the case study, and the reflective property on a direct-beam solar radiation was analyzed. Furthermore, possibility that high reflection performance would be realizable compared with a diffuse reflection was shown.