PREDICTION OF HEAT-TRANSFER TO LIQUID-SOLID FLUIDIZED-BEDS

Heat transfer coefficients to a liquid-solid fluidized bed in a cylind rical tube have been measured using water as liquid phase and three ty pes of cylindrical steel particles, as well as glass, nickel, copper a nd lead spheres of different sizes as solid phase. The independent var aibles included heat flux, liquid velocity and particle physical prope rties. The experimental results as well as a data bank containing a la rge number of measured heat transfer coefficients for solid-liquid flu idization over a wide range of operational parameters have been compar ed with the predictions of most published correlations. A model for th e prediction of heat transfer coefficients is proposed which predicts the present experimental data and the data of other investigators with good accuracy.