Abstract
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.
