ISSN 在线: 2688-7231
ISBN 在线: 978-1-56700-524-0
Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
Pore scale Simulation of Hydrogen Absorption of Metal Hydride Storage Bed
In solid sorption based storage systems, metal hydrides assumed a prominent role with advantages like compactness, safety and zero maintenance. However, their performance is affected by non-favourable material characteristics such as low thermal conductivity, powdering and densification during hydrogen sorption. Sorption performance of metal hydride based devices depends on heat transfer as the major rate controlling factor. During hydrogenation-dehydrogenation cycles, the morphology of the bed changes drastically due to powdering of the particles and its consequent settling and densification at the bottom of the container. Even though several studies were reported on the heat and mass transfer of metal hydride beds, the studies on the effects of bed morphology on its performance is less. In the present study, effect of this on the sorption performance of the bed is studied. Discrete element method is used to capture the particle mechanics of storage bed during charge discharge cycles. The consequent effect of this on the sorption performance of the bed is simulated using COMSOL Multiphysics®.