Abstract
The aim of this study was to examine the effectiveness of a mobile radiant cooling panel coated with natural nephrite to improve radiation efficiency. First, radiant capability such as radiant temperature, panel surface temperature, and flowing water temperature were measured in the old type of radiant cooling panel (O panel) and radiant cooling panel coated with natural nephrite (N panel). The N panel showed a distribution of the lower radiant temperature compared with the O panel and improved energy conservation. Next, eight healthy male students participated in the experiment to assess the differences of thermal comfort and thermal sensation between an N panel and an air conditioner. They felt thermal comfort even in a warm thermal state rather than the neutral thermal sensation in N panel, and thermal comfort tolerance was larger in N panel than in air conditioning.
