Mathematical modelling of hydrogen storage systems

A detailed mathematical model of a hydride bed has been developed to describe its behaviour under both hydriding and dehydriding conditions. In contrast to other hydride bed models previously reported in the literature, this model simulates an actual, commercially available containment vessel, rather than that of an abstract ideal situation. Thus the model provides a convenient means of predicting the time taken to release or absorb given amounts of hydrogen. These are calculated from the heat transfer characteristics and diffusion properties of particular metal alloys. Comparisons are given between the actual operating characteristics and those simulated by the model. A brief discussion of the reaction kinetics of hydriding certain metal alloys is also included.