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Development of a heat storage demonstration unit on the basis of Mg2FeH6 as heat storage material and molten salt as heat transfer media

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Urbanczyk,  Robert
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;
Institut für Energie- und Umwelttechnik e.V., Bliersheimerstr. 60, 47229 Duisburg, Germany;

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Peinecke,  Kateryna
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Felderhoff,  Michael
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Urbanczyk, R., Peinecke, K., Peil, S., & Felderhoff, M. (2017). Development of a heat storage demonstration unit on the basis of Mg2FeH6 as heat storage material and molten salt as heat transfer media. International Journal of Hydrogen Energy, 42(19), 13818-13826. doi:10.1016/j.ijhydene.2017.02.160.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-71C7-D
Abstract
The development and preliminary tests of a 5 kg Mg2FeH6 heat storage system which is useable for short and long-term storage applications at temperatures around 500 °C are described. The heat transfer for the heat storage process (dehydrogenation of the hydride Mg2FeH6) and heat release (hydrogenation of the hydride precursor 2 Mg-Fe) is done by the flow of molten salt in appropriate heat exchangers serving as heat source or heat sink. The construction of the tube bundle reactor as a heat storage tank is presented. 1.6 kWh of heat could be released and 1.5 kWh of heat could be stored during the first experimental tests. Difficulties, which occured during the preliminary tests, are described.