Effect of variable thermal conductivity and specific heat capacity on the calculation of the critical metal hydride thickness for Ti_1.1CrMn

High pressure metal hydrides have been recently considered as one of the most promising hydrogen solid storage options for on - board applications. Unfortunately the high purchasing costs related to these materials and the complexity related to building a scaled high pressure tank system with activated powder and embedded heat exchanger makes difficult to set up experimental facilities. Trustable simulation models that can address the system ́s performances to a particular design are then a funda mental step to be taken prior any experimental setup. This study considers a detailed 1D fueling model is applied to the metal hydride system, with Ti _1.1 CrMn as the absorbing alloy, to predict the weight fraction of absorbed hydrogen and solid bed temperat ure . Dependencies of thermal conductivity and specific heat capacity upon pressure and hydrogen content respectively , are accounted for, by interpolating experimental data. The effect of variable parameters on the critical metal hydride thickness is invest igated and compared to results obtained from a constant parameter analysis . At the end , the discrepancy in the metal hydride thickness value is estimated around 10%