Part of #EXPERIMENTAL INVESTIGATION OF HEAT TRANSFER TO A METALLIC ROD IN A FLUIDIZED BED OF SMALL PARTICLES# :
Publishing year : 2003
Conference : Eighth National Congress of Chemical Engineering of Iran
Number of pages : 5
Abstract: The effect of heat carriers on a heat transfer to a cylindrical metal bar was investigated in a pilot scale fluidized bed with small spherical solids (2.7 mm glass beads and steel balls). Rods of aluminum and steel, each with 10 and 20 mm diameter and 60 mm long, were heated by means of hot air. In each experiment, the temperature of the solid center was measured at various intervals of time. The effect of various parameters such as air velocity, air temperature, mass ratio of fluidizing material to solid, type of fluidizing material, diameter of the fluidizing material and the diameter of solid were investigated.
It was found that the presence of small spherical fluidized solids enhances heat transfer rate. The rate of heat transfer increases with decreasing solid diameter, increasing the fluidizing material's thermal conductivity, and increasing the air temperature, but the air velocity and amount of fluidized material do not have a significant effect on the heat transfer rate in well-fluidized systems.