Immersed heater‐to‐bed heat transfer in liquid‐solid fluidized beds

Heat transfer characteristics of a liquid-solid fluidized bed with an immersion heater were experimentally investigated. Specifically, the axial dispersion coefficients of fluidized particles were measured by means of a relaxation method to examine the effects of particle motion on the rate of heat transfer. Furthermore, the effects of the liquid flow rate or bed porosity and of the particle size on the heat transfer resistance in the region adjacent to the heater surface and that in the bed proper were examined. The resultant data have been analyzed in terms of the two resistance-in-series model