We developed an empirical quantitative evaluation of the energy-saving performance of heat-resistant paint in winter. Specifically, heat-resistant paint and conventional wall paint were applied to steel boxes placed in a room kept at constant temperature and humidity, after which heat sources were placed in the boxes and the energy-saving performance of each type of paint was evaluated from the change in temperature at the box walls and inside the boxes. The experimental results show that the heat-resistant paint reduced the amount of heat escaping through the walls, and it can thus be expected to reduce heat loss. Furthermore, in the case of the heat-resistant paint, the amount of heat passing through the walls was 16% less than that in the case of the conventional paint. The conduction heat flux for the box with ceramic insulating paint was less than that for other boxes. It is thus thought that the thermal resistance of the ceramic insulation paint is higher than that of the other paints. We estimated the thermal resistance of each paint and found that thermal resistance of ceramic insulating paint was 12.4 times that of conventional energy-saving paint and twice that of high-reflectance paint.
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