2021 年 42 巻 6 号 p. 432-441
In this research, to verify the thermal performance of high-reflectance coating, three types of high reflectance coatings and general paint were applied to the Folded-Plate roof on the existing factory in Gunma Prefecture, and horizontal global solar radiation, heat flux vectors, surface temperature, and indoor temperature etc., were measured for a long time, through a year. The reflectivity and emissivity of the roof surface were improved by the coating, and the heat flex was reduced, and the surface temperature was lowered in all seasons compared with the case without coating. There is a negative correlation between the amount of global solar radiation and the heat flux on the roof surface, and the slope of the approximate straight line becomes much smaller by coating. In comparison with the ceramic high reflectivity coating, the ceramic balloon coating had higher performance in winter and autumn, but the difference could not be confirmed in summer and spring.
