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Standardized hydrogen storage module with high utilization factor based on metal hydride-graphite composites
Ist Teil von
Journal of power sources, 2017-02, Vol.342, p.970-979
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
2017
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
In view of hydrogen based backup power systems or small-scale power2gas units, hydrogen storages based on metal hydrides offer a safe and reliable solution. By using Hydralloy C5 as suitable hydride forming alloy, the present tank design guarantees very simple operating conditions: pressures between 4 bar and 30 bar, temperatures between 15 °C and 40 °C and minimal efforts for thermal management in combination with fast and constant charging and discharging capabilities. The modular tank consists of 4 layers with 5 reactor tubes each that are filled with metal hydride-graphite composites of a diameter of 21 mm. Experiments show that each layer of this tank is able to desorb the desired amount of hydrogen for a fuel cell operation at electrical power of 160 Wel for 100 min reaching a utilization factor of 93% of the stored hydrogen at RC. Furthermore, the experimental results of modularity, increasing loads and the electric air ventilation are presented.
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•Standardized reactor design for stationary metal hydride hydrogen storage.•Metal hydride-graphite composites for compact system with low temperature gradient.•Utilization factor of 93% reached at relevant charging conditions.•System scalability to higher loads.