The storage of hydrogen by using hydride material is a challenge for using hydrogen for lot of applications. For this type of storage a fast heat transfer during filling the tank is crucially important. The time of filling is depending on the temperature of hydride, and filling can be stopped if the temperature is too high. Controling the temperature is then an important issue. This paper deals with the temperature assessment during the hydrogen refueling (or decharging). A detailed mathematical model is developed to assess the temperature of a tank during the hydrogen absorption. The model is based on assumption on the shape of the tank and on the heat process generation. A numerical solution is provided by using the finite difference method. The model provides the profile of temperature in time for various tank dimensions. This model provides an easy way to investigate the problem of heat exchange and a firsthand information about the temperature at the surface of the tank at different times.

A practical example is investigated. The parameters used in the model are based on experimental data obtained for LaNi4.78Sn0.22. The investigated system is a closed ended tube made of aluminum alloy. This tank shell is filled by hydride particles. Hydrogen is introduced in this reactor, at ambient pressure. The aim is to get information about the temperature developed at the surface of the cylinder in order to aid the design of the tank by taking into account the thermal loading.