Abstract
Experiments were performed on a packed bed of large diameter, based on the previous experimental results of packed bed of small diameter. Aeration rates were selected systematically while the other experimental conditions were kept as similar as possible to those of the previous study. Radial temperature distribution effected by the wall, and the quantity of radial heat transferred were investigated. It is clear that the maximum temperature rose as the diameter of packed bed was increased, and the transition of distribution of temperature was very complex. By comparing the heat conduction in regions bounded by the surface of the cylindrical co-ordinate system, classified by aeration rates, the fairly complicated heat transfer phenomena involving exothermic and endothermic reactions of the materials of packed bed, were elucidated. By measuring the temperature at mid-area center of each layer, and simplifying the thermal engineering calculations involved, it was possible to estimate the distribution of temperature in the packed bed.
