Heat transfer study in a pilot-plant scale bubble column

被引:24
|
作者
Abdulmohsin, Rahman S. [1 ]
Abid, Balasim A. [2 ]
Al-Dahhan, Muthanna H. [1 ]
机构
[1] Missouri Univ Sci & Technol, Dept Chem & Biol Engn, Rolla, MO 65409 USA
[2] Univ Technol Baghdad, Dept Chem Engn, Baghdad, Iraq
来源
关键词
Bubble columns; Pilot-plant scale; Heat transfer coefficient; Axial location; Radial profile; Flow regime; GAS-HOLDUP; TRANSFER COEFFICIENT; IMMERSED SURFACES; 3-PHASE SYSTEMS; HYDRODYNAMICS; 2-PHASE;
D O I
10.1016/j.cherd.2010.04.019
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The effects of superficial gas velocity on heat transfer coefficient and its time-averaged radial profiles along the bed height have been investigated in a pilot-plant scale bubble column of 0.44m diameter using air-water system. Notable differences were observed in heat transfer coefficients along the bed axial locations particularly between the sparger (Z/D = 0.28) and the fully developed flow (Z/D = 4.8) regions. In the fully developed flow region larger heat transfer coefficient values were obtained compared to those in the sparger region. About 14-22% increase in heat transfer coefficients measured in the fully developed flow region has been observed compared to those measured in the distributor region when the superficial gas velocity increases from 0.05 to 0.45 m/s. The heat transfer coefficients in the column center for all the conditions studied are about 9-13% larger than those near the wall region. It has been noted that in the fully developed flow region, the axial variation of the heat transfer coefficients was not significant. (C) 2010 Published by Elsevier B.V. on behalf of The Institution of Chemical Engineers.
引用
收藏
页码:78 / 84
页数:7
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