426 建築用膜材のふく射特性の測定とヒートアイランド対策としての評価(都市のエネルギー・環境,環境保全型エネルギー技術分野)

概要

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Recently, in many cities, thermal air pollution has arisen from superfluous progress of the increase in artificial waste heat and covering, and loss of natural space. Consequently, in the city, compared with the suburbs, temperature becomes high and the heat island phenomenon has appeared. As the measures, it is very important to control the radiation. Therefore, we notice membrane materials which have small solar absorptance. In this study, we selected three membrane materials of polytetra fluorine ethylene (white, gray, yellow green), and these solar absorptances and infrared emissivities were measured. These solar absorptances were 0.19, 0.53, 0.70 and infrared emissivities were about 0.9. We applied the measured values to the math calculation and evaluate surface temperature for construction and sensible heat flux to the atmosphere. Consequently, the surface temperature is lower and the sensible heat flux decreases. So, it is expected that membrane materials mitigate the heat island phenomenon.
社団法人日本機械学会の論文
2006-07-11