Dj. Gunn et N. Hilal, HEAT-TRANSFER FROM VERTICAL INSERTS IN GAS-FLUIDIZED BEDS, International journal of heat and mass transfer, 39(16), 1996, pp. 3357-3365
For a chemical reaction of large exothermic or endothermicity when car
ried out-in fluidized beds, an internal heat transfer surface addition
al to the walls of the bed is often necessary. The heat transfer chara
cteristics of vertical tubular inserts placed in the fluidized bed wer
e examined by measuring the heat transfer from coils integral in the i
nserts to the fluidized bed. It was found that the heat transfer coeff
icients measured at the coils corresponded closely to the heat transfe
r coefficient for bulk heat transfer measured in open fluidized beds u
nder non-slugging conditions. Variations in heat transfer over the arr
ay of inserts were small, and distributor effects were significant onl
y at the onset of fluidization. The experimental results were successf
ully related to an earlier correlation given for heat transfer in open
beds. Copyright (C) 1996 Elsevier Science Ltd.