Publication

Mathematical modeling, numerical simulation and experimental comparison of the desorption process in a metal hydride hydrogen storage system

Journal Article (2018)

Journal

International Journal of Hydrogen Energy

Doc link

https://doi.org/10.1016/j.ijhydene.2017.12.172

File

Download the digital copy of the doc pdf document

Authors

Abstract

A two-dimensional axisymmetric model is developed to study the hydrogen desorption reaction and its subsequent discharge in a metal hydride canister. Experimental tests are performed on an in-house fabricated setup. An extensive study on the effects of the metal properties and boundary conditions on discharging performance is carried out through non- destructive testing (NDT). Results show that the desorption process is more effective if the activation energy for desorption (Ed) and the reaction enthalpy (∆H) decrease, and when the desorption rate coefficient (Cd) and the external convection heat transfer coefficient when the bottle is being heated (h) increase. Furthermore, porosity (ε) can be useful for the design of hydrogen storage systems, with a trade-off between charge/discharge time and storage capacity. Numerical and experimental results are compared achieving a good agreement. These results can be used to select metal hydride materials and also for the future evaluation of metal hydride degradation.


Categories

control system analysis computing, power system control, storage automation.

Author keywords

Hydrogen storage; Metal hydride; Hydrogen desorption; Two-dimensional axisymmetric simulation; Experimental testing

Scientific reference

R. Busqué, R. Torres, J. Grau, V. Roda and A.P. Husar. Mathematical modeling, numerical simulation and experimental comparison of the desorption process in a metal hydride hydrogen storage system. International Journal of Hydrogen Energy, 2018, to appear.