Investigation of bed-to-wall heat transfer characteristics in a rolling circulating fluidized bed
Investigation of bed-to-wall heat transfer characteristics in a rolling circulating fluidized bed
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滚动循环流化床床壁传热特性研究
DOI：
10.1016/j.powtec.2014.08.068
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发表时间：
2015
影响因子：
5.2
通讯作者：
Takei, Masahiro
中科院分区：
文献类型：
--
作者：
Liu, Kai;Murata, Hiroyuki;Harumi, Kazuyoshi;Takei, Masahiro
为了提高循环流化床（CFB）的热回收性能，研究了船舶引起的滚动运动对床壁传热特性的影响。循环流化床是船舶废热回收系统解决腐蚀问题的潜在选择。提出了一种改进的基于簇的模型（ICBM），该模型考虑了滚动运动引起簇的潜在动态特征变化，用于滚动循环流化床换热系数的预测。将ICBM预测的换热系数与常用的聚簇更新模型（CRM）的预测结果进行了比较，并通过换热实验的测量结果进行了评价。结果表明，CRM预测的换热系数与实验结果吻合较好。然而，在应用滚动运动的情况下，热传递系数被CRM大大低估。同时，考虑壁面气体层的消失和团簇中颗粒体积分数的增加，ICBM I预测的换热系数与换热实验中实测的换热系数吻合较好。提出了团簇动态特性的变化是影响滚动循环流化床传热增强的主要因素。
In order to enhance the heat recovery properties of the circulating fluidized bed (CFB) which is proposed to be a potential choice for the waste heat recovery system in a ship to solve the corrosion problem, effect of the rolling motion induced by the ship on the bed-to-wall heat transfer characteristics has been investigated. Improved cluster-based models (ICBM), in which the potential dynamic feature change of clusters induced by the rolling motion is considered, have been proposed for the prediction of the heat transfer coefficient in the rolling CFB. The predicted heat transfer coefficients by ICBM were compared with the predicted results of cluster renewal model (CRM) which is applied commonly to the CFB at upright attitude, and evaluated by the measurement results in the heat transfer experiment. As results, the predicted heat transfer coefficient by CRM agrees well with the experimental results in the CFB at upright attitude. However, in the case that the rolling motion is applied, the heat transfer coefficient is extremely under-estimated by CRM. Meanwhile, the predicted heat transfer coefficient by ICBM I, which takes into account the disappearance of the gas layer next to the wall and the increase of the particle volume fraction in clusters due to the rolling motion, is in good accord with the measured heat transfer coefficient in the heat transfer experiments. The dynamic feature changes of the cluster are proposed to be the primary factors for the heat transfer augmentation in the rolling CFB.
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影响因子：
--
作者：
Animesh Dutta;P. Basu
通讯作者：
Animesh Dutta;P. Basu
影响因子：
3.5
作者：
M. Horio
通讯作者：
M. Horio
DOI：
10.5988/jime1966.28.717
发表时间：
1993-11
期刊：
Journal of the Marine Engineering Society in Japan
影响因子：
--
作者：
栄一 西川
通讯作者：
栄一 西川
影响因子：
4.7
作者：
R. Wu;J. Grace;C. J. Lim
通讯作者：
R. Wu;J. Grace;C. J. Lim
影响因子：
4.7
作者：
J. Zhou;J. Grace;C. J. Lim;C. Brereton
通讯作者：
J. Zhou;J. Grace;C. J. Lim;C. Brereton