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A numerical study of thermo-fluid phenomena in metal hydride beds in the hydriding process

机译：氢化过程中金属氢化物床内热流体现象的数值研究

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摘要

Two-dimensional solution for unsteady heat and mass transfer in metal hydride bed in the hydriding process is obtained using a finite volume method in order to understand the physical mechanisms occurring in the bed. We considered the effects of different thermal conductivities, bed diameters and the presence of fins on thermo-fluid phenomena occurring in the bed. The present results show that the whole process occurring in the bed is governed and controlled by heat transfer from the bed to the surrounding cooling fluid. So we need to develop the method to improve and enhance the heat transfer rate from the bed to the surrounding cooling fluid in order to apply the metal hydride bed to the heat exchanging system efficiently. The higher thermal conductivity, smaller bed diameter and the presence of fins in the bed give more enhanced heat transfer rate from the bed. The present computational results are compared with the experimental data to check the validity of the present calculation, showing the good agreement between them.
机译：为了了解加氢床中发生的物理机理，使用有限体积法获得了氢化过程中加氢床中非稳态传热和传质的二维解。我们考虑了不同的热导率，床直径和翅片的存在对床中发生的热流体现象的影响。目前的结果表明，发生在床层中的整个过程是由床层向周围的冷却液传热来控制的。因此，我们需要开发一种方法来改善和提高从床到周围冷却流体的传热速率，以便将金属氢化物床有效地应用于热交换系统。较高的热导率，较小的床层直径以及在床层中存在散热片会提高从床层传热的速率。将当前的计算结果与实验数据进行比较，以验证当前计算的有效性，表明它们之间的良好一致性。

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