Introducing cooling airflow is an effective method for achieving the localized cooling rate required during waste heat recovery of blast furnace slag. However, the associated parasitic loads must be considered. This study investigates moving bed heat exchanger with airflow-assisted cooling from an exergy perspective. The effects of the granular side Peclet number, airflow side Reynolds number, and the height ratio of the airflow section on heat loss, exergy destruction, and its distributions were examined experimentally. The results show that the trends of temperature and pressure exergy destruction with each parameter tend to be opposite. Therefore, optimizing the parameters requires a trade-off between different types of destruction. Additionally, reducing exergy destruction while meeting the cooling rate requirement was considered. The optimal parameter set was determined by taking the cooling rate requirement as a constraint and minimizing the dimensionless temperature and pressure exergy destruction to obtain the Pareto front.

中文翻译：

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气流辅助冷却移动床换热器火用破坏最小化优化


引入冷却气流是实现高炉矿渣余热回收所需的局部冷却速率的有效方法。然而，必须考虑相关的寄生负载。本研究从火用的角度研究了具有气流辅助冷却的移动床热交换器。实验研究了颗粒侧佩克莱特数、气流侧雷诺数和气流截面高度比对热损失、火用破坏及其分布的影响。结果表明，温度和压力火用破坏随各参数的变化趋势趋于相反。因此，优化参数需要在不同类型的破坏之间进行权衡。此外，还考虑了在满足冷却速率要求的同时减少火用破坏。以冷却速率要求为约束，最小化无因次温度和压力火用破坏，确定最优参数集，以获得帕累托前沿。