2136 可視及び赤外領域における塗料のふく射特性の最適化手法(G06-5 熱工学(5) 伝熱(3),21世紀地球環境革命の機械工学:人・マイクロナノ・エネルギー・環境)

概要

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Pigmented coatings with high reflectivity against solar irradiation can be used to control unwanted thermal heating. However, these surfaces produce glare that is unpleasant to the eye and can damage the appearance of the coated object. Our proposed coatings maximize the reflectivity of the near infrared (NIR) region to reduce thermal effects, while for aesthetic appeal they also minimize the visible (VIS) reflected energy. Titanium dioxide, zinc oxide and aluminum oxide are common white pigments used in coatings considered in this work. Radiative heat transfer in pigmented layer is analyzed using radiation element method by ray emission model (REM^2). The optimum values of particle size and volume fraction, film thickness and color coordinates are obtained for each pigment. Our results show that these pigments show almost the same behavior for our purpose but optimum TiO_2 pigmented coating has lower film thickness and volume fraction.
社団法人日本機械学会の論文
2008-08-02