A prediction model of heat and mass transfer considering the expansion/contraction phenomena in the metal hydride packed bed absorbing/desorbing hydrogen

通过测量金属氢化物填充床的膨胀/收缩比来了解氢吸收/解吸过程中床层的空隙率。用该数据预测了床层的有效导热系数。通过测定裂解率，探讨了脱附过程中床层裂解的机理。最后，这些结果被应用到一个新的预测模型，该模型预测的瞬态温度分布和金属氢化物床的吸/脱附速率，高性能的储氢/供氢装置的设计。

Measurement of expansion/contraction ratio of the metal hydride packed bed was performed to understand the void fraction of the bed during the hydrogen absorption/desorption process. The data was used to predict the effective thermal conductivity of the bed. Measurement of the cracking ratio also was performed to understand the mechanism of the cracking in the bed during desorbing process. Finally, these results were applied to a novel prediction model, which predicts a transient temperature profile and an absorbing/desorbing rate of the metal hydride bed, for a design of high performance hydrogen storage/supply device.