Title: Hydride-based thermal energy storage

Journal Article · · Progress in Energy
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Abstract The potential and research surrounding metal hydride (MH) based thermal energy storage is discussed, focusing on next generation thermo-chemical energy storage (TCES) for concentrated solar power. The site availability model to represent the reaction mechanisms of both the forward and backward MH reaction is presented, where this model is extrapolated to a small pilot scale reactor, detailing how a TCES could function/operate in a real-world setting using a conventional shell & tube reactor approach. Further, the important parameter of effective thermal conductivity is explored using an innovative multi-scale model, to providing extensive and relevant experimental data useful for reactor and system design. Promising high temperature MH material configurations may be tuned by either destabilisation, such as using additions to Ca and Sr based hydrides, or by stabilisation, such as fluorine addition to NaH, MgH 2 , or NaMgH 3 . This versatile thermodynamic tuning is discussed, including the challenges in accurately measuring the material characteristics at elevated temperatures (500 –700 °C). Attention to scale up is explored, including generic design and prototype considerations, and an example of a novel pilot-scale pillow-plate reactor currently in development; where materials used are discussed, overall tank design scope and system integration.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
Australian Research Council (ARC); Department of Industry, Science, Energy and Resources for the 2019 Global Innovation Linkage; Engineering and Physical Sciences Research Council (EPSRC); Europäischer Fonds für regionale Entwicklung (EFRE); USDOE; USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1873021
Report Number(s):
LLNL-JRNL-830599
Journal Information:
Progress in Energy, Journal Name: Progress in Energy Journal Issue: 3 Vol. 4; ISSN 2516-1083
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United Kingdom
Language:
English

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