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Experimental investigations on a coupled metal hydride based thermal energy storage system

Malleswararao, K and Kumar, P and Dutta, P and Srinivasa Murthy, S (2024) Experimental investigations on a coupled metal hydride based thermal energy storage system. In: International Journal of Hydrogen Energy, 56 . pp. 1371-1383.

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Official URL: https://doi.org/10.1016/j.ijhydene.2023.12.191


Thermal energy storage using coupled metal hydride reactors is attractive because it offers several advantages such as one-time hydrogen loading, high thermal storage density, compactness and possibility of simultaneous heating and cooling. This study presents experimental investigations on a coupled metal hydride based thermal energy storage system. Based on compatibility criteria of hydrides described in this work, LaNi4.25Al0.75 for thermal energy storage and La0.75Ce0.25Ni5 for hydrogen storage were chosen. The study employed two novel cartridge type coupled reactors with enhanced heat transfer surfaces. The effects of heat source and ambient temperatures on the system performance were investigated. The study reveals that coupled hydride systems with suitable pairs of hydrides can deliver high energy storage capacities at good thermal efficiencies. The heat output of 227.7 kJ was achieved with a heat transfer rate of 130.7 W at 55.7 efficiency. The hydrogen storage alloy exhibited good compatibility with the energy storage alloy with fast hydrogenation and dehydrogenation. It also produced a cooling effect of 171.8 kJ while desorbing hydrogen. © 2024 Hydrogen Energy Publications LLC

Item Type: Journal Article
Publication: International Journal of Hydrogen Energy
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to Elsevier Ltd.
Keywords: Aluminum alloys; Cerium alloys; Cooling; Heat storage; Hydrides; Lanthanum alloys; Ternary alloys; Thermal energy, Coupled metal hydride reactor; Experimental investigations; High thermal; Hydrogen loadings; La0.75ce0.25ni5; Lani4.25al0.75; Metal-hydrides; Thermal energy storage; Thermal energy storage systems; Thermal storage, Hydrogen storage
Department/Centre: Division of Interdisciplinary Sciences > Interdisciplinary Centre for Energy Research
Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 01 Mar 2024 06:35
Last Modified: 01 Mar 2024 06:35
URI: https://eprints.iisc.ac.in/id/eprint/83905

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