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

测量了金属氢化物填充床的膨胀/收缩比，以了解金属氢化物填充床吸放氢过程中的空泡率。利用这些数据预测了床层的有效导热系数。为了解解吸过程中床内裂解的机理，还对裂解率进行了测定。最后，将这些结果应用到一个新的预测模型中，该模型预测了金属氢化物床的瞬时温度分布和吸放氢速率，为设计高性能的储氢/供应装置提供了依据。

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.