高速循環流動層内の単一水平円管周りの平均熱伝達率 Mean Heat Transfer Coefficient around a Horizontal Single Pipe in a Fast Circulating Fluidized Bed
Mean heat transfer coefficient <I>h<SUB>s</SUB></I> around a single, horizontal pipe settled in a fast circulating fluidized bed was measured under various fluidizing condition. The heat transfer coefficient could be correlated well with the solid fraction in gas-solid mixture flow, being a function of solid circulating rate, gas velocity and riser position. The value of <I>h<SUB>s</SUB></I> increased as the solid circulating rate became high. However, it was found that there was a critical solid fraction, ranged from 0.01 to 0.02, over which the increasing ratio dropped to a smaller one. This phenomenon was considered to be due to a characteristic change of the particle behavior around pipe.
化学工学論文集 23(3), 437-439, 1997-05-10
The Society of Chemical Engineers, Japan