ON THE SURFACE TEMPERATURE OF BUILDING ELEMENTS AFFECT TO THERMAL ENVIRONMENT IN THE ROOM : Part 1 Measuring apparatus of radiative temperature and its examination

This paper intended to obtain basic data of the index for the design of thermal environment, based on the heat balance equation of the human body. For this purpose, the hemispherical emissivity was introduced as the emissivity of finishing materials. The hemispherical emissivity agree with normal emissivity for most finishing materials, but does not agree for the glass plate This was confirmed by preliminary experiment. But the idea of the hemispherical emissivity is not convenience for the building materials. Then the radiative temperature was introduced, which was the temperature considered effect of the hemispherical emissivity. The radiative temperature were measured for any finishing materials by new apparatus for radiative temperature. From these experiment, it was appeared that the radiative temperature of the glass plate did not agree with the surface temperature by the thermocouple because the hemispherical emissivity was smaller than the normal emissivity. The radiative temperature of complex material of glass plate with drape were examined, too, and evaluated mechanism of heat transfer.