1Department of Chemical Engineering, Isfahan University of Technology, Isfahan, I.R. IRAN
2The university of Petrileum Industry, Ahwas, I.R. IRAN
The presence of particles in liquid-solid fluidized beds enhances the bed heat transfer, because the movement of the particles leads to an increased turbulence in the system. Moreover, the violent movement of the particles has a positive effect on fouling of the heat transfer surface. The aim of this investigation was to perform systematic measurements of bed voidage and heat transfer coefficient for solid-liquid fluidization in a cylindrical tube and to study the effect of process parameters such as particle size and density, flow velocity, and liquid viscosity on these subjects. A large number of experiments were performed using different cylindrical and spherical particles fluidized in aqueous CMC solution with different concentrations. Using the experimental results, a new correlation for predicting heat transfer coefficient in non-Newtonian liquid-solid fluidized bed heat exchanger was introduced.
 Hatch, L. P. and Weth, G. G., “Scale Control in High Temperature Distillation Utilizing Fluidized Bed Heat Exchangers”, Research and Development Progress Report No. 571 (1970).
 Allen, C. A. and Grimmentt, E. S., “Liquid-fluidized Bed Heat Exchanger Design Parameters”, Department of Energy, Idaho Operations Office, under contact 1-322-1570 (1978).
 Klaren, D. G., “The Fluid Bed Heat Exchanger; Principle and Models of operation and Heat Transfer Results Under Severe Fouling Conditions”, Fouling Prev. Res. Dig. 5, 3 (1983).
 Rautenbach, R. and Kollbach, J., “New Development in Fluidized Bed Heat Transfer for Preventing Fouling”, Swiss Chem. 8, 47 (1986).
 Kollbach, J. S., Dahm, W. and Rautenbach, R., “Continuous Cleaning of Heat Exchangers with Recirculating Fluidized Bed”, Heat Transfer Eng., 8, 26(1987).
 Richardson, J. F., Romani, M. N. and Shakiri, K. J., “Heat Transfer from Immersed Surfaces in Liquid Fluidized Beds”, Chem. Eng. Sci.,31, 619 (1976).
 Jamialahmadi, M., Malayeri, M. R. and Muller-Steinhagen, H., “A unified Correlation for the Prediction of Heat Transfer Coefficients in Liquid/Solid Fluidized Bed Systems”, Transactions of the ASME, Vol. 118, 952 (1996).
 Klaren, D., “Fluidized Bed Heat Exchanger for Severe Fouling Liquids: Principle, Applications in Industry and Possibilities in the Near Future”, Int. Conf. On Fouling in Process Plant, Oxford (1988).
 Jamialahmadi, M., Malayeri, M.R. and Muller-Steinhagen, H., “Prediction of Heat Trensfer to Liquid-Solid Fluidized Beds”, The Canadian Journal of Chemical Engineering, Vol. 73, 444 (1995).
 Jamialahmadi, M., Malayeri, M.R. and Muller-Steinhagen, H., “Prediction of Optimum Operating Conditions of Liquid Fluidized Bed Systems”, Can. J. Chem. Eng., 75, 327 (1997).