Canadian Journal of Chemical Engineering, Vol.77, No.1, 45-53, 1999
An investigation of heat transfer from a vertical tube in a spouted bed
An experimental investigation on heat transfer from a vertical tube in a gas-solid spouted bed has been conducted. Values of heat transfer coefficients (h(s)) have been found to vary between 95 and 230 W/m(2)degrees C. Maximum values of h(s) are always at the spout axis and decrease monotonically towards the column wall. The drop is most important at the spout-annulus boundary. Most of the effects from different parameters can be explained by the flow patterns of the gas, although particle convection still contributes to some extent to the heat transfer rate. Equations correlating h(s) in the spout and the annulus have been developed.