Hydrogenation behavior in rectangular metal hydride tanks under effective heat management processes for green building applications

Evangelos Gkanas, Martin Khzouz, Grigorios Panagakos, Thomas Statheros, Panagiota Mihalakakou, Gerasimos I. Siasos, Georgios Skodras, Sofoklis S. Makridis

    Research output: Contribution to journalArticlepeer-review

    40 Citations (Scopus)
    109 Downloads (Pure)

    Abstract

    A fully validated with solid experimental results numerical study regarding the hydrogenation process of rectangular metal hydride beds under effective internal heat management is presented and analysed. Three different geometries equipped with plain embedded heat management tubes are introduced and examined. For each geometry, five different values of metal hydride thickness are studied and additionally, the effect of the coolant flow is examined in terms of different values of heat transfer coefficient [W/m2K]. To evaluate the effect of the heat management process, a variable named as Non-Dimensional Conductance (NDC) is analysed and studied. Furthermore, three different materials are introduced, two “conventional” AB5 intermetallics and a novel AB2-based Laves phase intermetallic. According to the results, the optimum value for the metal hydride thickness was found to be 10.39 mm, while the optimum value for the heat transfer coefficient was 2000 [W/m2K]. For the above optimum conditions, the performance of the novel AB2-based Laves phase intermetallic showed the fastest hydrogenation kinetics compared to the other two AB5 intermetallics indicating that is a powerful storage material for stationary applications.
    Original languageEnglish
    Pages (from-to)518-530
    Number of pages13
    JournalEnergy
    Volume142
    Early online date10 Oct 2017
    DOIs
    Publication statusPublished - 1 Jan 2018

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in Energy. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy, [(in press), (2017)] DOI: 10.1016/j.energy.2017.10.040

    © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    Keywords

    • Hydrogen storage
    • Heat management
    • Stationary applications
    • Heat and mass transfer
    • Green buildings

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