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    Metal hydride thermal heat storage prototype for concentrating solar thermal power

    Access Status
    Fulltext not available
    Authors
    Paskevicius, M.
    Sheppard, Drew
    Williamson, K.
    Buckley, Craig
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Paskevicius, M. and Sheppard, D. and Williamson, K. and Buckley, C. 2015. Metal hydride thermal heat storage prototype for concentrating solar thermal power. Energy. 88: pp. 469-477.
    Source Title
    Energy
    DOI
    10.1016/j.energy.2015.05.068
    ISSN
    0360-5442
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/31257
    Collection
    • Curtin Research Publications
    Abstract

    CSP (concentrating solar thermal power) is emerging as a viable and cost effective solution to renewable energy generation. Molten salts are currently used as heat storage media to enable power generation during the night-cycle. Metal hydrides offer the possibility of storing energy with an order of magnitude less raw material than molten salts due to their impressive energy densities. To test the viability of hydrogen storage materials for CSP applications we have designed and constructed a prototype scale apparatus for screening materials under dynamic conditions with active heat extraction. The apparatus is tested with 19 g of well-known MgH2 to assess the viability of the design for screening purposes. The metal hydride is thermally cycled up to 420 °C more than 20 times with a minimal loss in hydrogen capacity. Issues relating to testing on a prototype scale are discussed, where problems with environmental heat loss and powder compaction dominate the performance of the metal hydride in the prototype. Problems with heat loss are inherently minimised on scale-up, leading to thermal behaviour more representative of a full-scale CSP energy storage system.

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