Temperature distribution in a new composite material for hydrogen storage – Design study of different cooling concepts

Keywords

cooling concept, hydrogen storage, metal hydride storage, temperature development

Abstract

A newly developed composite material has been explored based on metal hydrides in combination with polymers enriched with highly porous carbon. As metal hydride, a RHC (reactive hydride composite) was chosen (e.g., MgH2 + 2 LiBH4). The hydride is infiltrated into the pores of the porous carbon suppressing the long-range phase separation of the two different hydrides by nano-confinement. The aim is to maintain fast kinetics and achieve cycle stability of the RHC (reactive hydride composite). The combination of RHC and porous carbon is then integrated into a polymer film to allow an easy and safe handling of the material. To produce a storage system out of such a film, the thin material is rolled in the same style like a rolled membrane module; i.e., it is rolled together with a thin spacer (e.g., steel mesh) allowing an easy hydrogen access to all parts of the membrane. The last step is the implementation of the rolled storage module into the tank shell. To analyze different design concepts and the behavior of this newly developed composite storage material, extensive FEM-simulations have been realized for different cooling structures. The latter is necessary to fulfil the thermodynamic requirements and to maximize the speed of hydrogen storage. Therefore, the temperature development within the storage during hydrogen feeding are investigated. Beside this, the hydrogen flow as well as the kinetics of the chemical reaction are analyzed. Based on such extensive simulations of different design concepts, the most promising overall storage systems are developed and systematically optimized. Finally, the total hydrogen content of the overall storage system is calculated and compared between different design concepts. Based on this, conclusions are drawn about robust criteria how to construct a cooling and heating device for this new storage material.

Copyright

© 2019, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Lars Baetcke
AU  - Martin Kaltschmitt
PY  - 2019/11
DA  - 2019/11
TI  - Temperature distribution in a new composite material for hydrogen storage – Design study of different cooling concepts
BT  - Proceedings of the 13th International Renewable Energy Storage Conference 2019 (IRES 2019)
PB  - Atlantis Press
SP  - 64
EP  - 73
SN  - 2589-4943
UR  - https://www.atlantis-press.com/article/125923317
ID  - Baetcke2019/11
ER  -