29.非定常方式による灰放射率推定方法

抄録

This paper presents an analytical solution method to obtain the emittance of coal-ash in the high-temperature atmosphere. The sample was placed in the electric furnace(max. 1150℃) having a tube-dropping mechanism. Once the cold tube, which removes the reflection component, has been dropped into the furnace, radiation intensities from the sample began to decrease. Transient changes in the intensities were compared with the theoretical values. Our method is unique in applying the transient thermal conduction analysis to the determination of the emittance. For the verification of our method, the emittance of metal oxides were measured at 700℃ in the wavelength of 0.9μm and compared to the publish values.