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Investigation into overall heat transfer coefficient in indirectly heated rotary torrefier

机译:间接加热旋风焙烧炉整体传热系数的研究

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This paper investigates into the heat transfer from the wall to solids moving inside an indirectly heated rotary reactor with flights. The cluster renewal mechanistic model was used to develop a model for estimating the effective heat transfer coefficient (EHTC) from wall to solids. The overall heat transfer coefficient (OHTC) considered the heat transfer from the reactor wall to solids, and that from the wall to gases in the reactor whose wall temperature is maintained at constant temperature. Predictions from the OHTC model showed a good agreement with values measured in the reactor fed with brass particles. The model for estimating the EHTC was compared with the published experimental values of Herz et al. (2012), and showed a better agreement than the existing models. The developed model could therefore be applied for designing rotary torrefier or used for overall performance model of rotary torrefier.
机译:本文研究了从壁到固体的热传递,该固体在带有刮板的间接加热旋转反应器内部移动。使用聚类更新机制模型来开发一个模型,以估算从壁到固体的有效传热系数(EHTC)。总传热系数(OHTC)考虑了从反应器壁到固体的传热,以及从壁到反应器中壁温度保持在恒定温度的气体的传热。 OHTC模型的预测结果与在喂入黄铜颗粒的反应器中测得的值非常吻合。将估算EHTC的模型与Herz等人发表的实验值进行了比较。 (2012年),并显示出比现有模型更好的协议。因此,所开发的模型可以用于设计旋耕机或用于旋耕机的整体性能模型。

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