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Performance prediction of a coupled metal hydride based thermal energy storage system

Malleswararao, K and N, A and Srinivasa Murthy, S and Dutta, P (2020) Performance prediction of a coupled metal hydride based thermal energy storage system. In: International Journal of Hydrogen Energy, 45 (32). pp. 16239-16253.

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Official URL: https://dx.doi.org/10.1016/j.ijhydene.2020.03.251


The present study discusses the thermodynamic compatibility criteria for the selection of metal hydride pairs for the application in coupled metal hydride based thermal energy storage systems. These are closed systems comprising of two metal hydride beds – a primary bed for energy storage and a secondary bed for hydrogen storage. The performance of a coupled system is analyzed considering Mg2Ni material for energy storage and LaNi5 material for hydrogen storage. A 3-D model is developed and simulated using COMSOL Multiphysics® at charging and discharging temperatures of 300 °C and 230 °C, respectively. The LaNi5 bed used for hydrogen storage is operated close to ambient temperature of 25 °C. The results of the first three consecutive cycles are presented. The thermal storage system achieved a volumetric energy storage density of 156 kWh m−3 at energy storage efficiency of 89.4 during third cycle. © 2020 Hydrogen Energy Publications LLC

Item Type: Journal Article
Publication: International Journal of Hydrogen Energy
Publisher: Elsevier Ltd
Additional Information: Copy right for this article belongs to Elsevier Ltd
Keywords: Thermal energy storage Metal hydride Numerical modeling Reaction kinetics Energy storage density
Department/Centre: Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 16 Nov 2020 11:34
Last Modified: 16 Nov 2020 11:34
URI: http://eprints.iisc.ac.in/id/eprint/65645

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