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Lightweight reactor design by additive manufacturing for preheating applications using metal hydrides

Bürger, Inga and Sourmelis Terzopoulos, Venizelos Eleftherios and Kretschmer, Carolin and Kölbig, Mila and Brack, Christian and Linder, Marc Philipp (2021) Lightweight reactor design by additive manufacturing for preheating applications using metal hydrides. International Journal of Hydrogen Energy, 46 (56), pp. 28686-28699. Elsevier. doi: 10.1016/j.ijhydene.2021.06.091. ISSN 0360-3199.

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Thermal energy storage systems based on metal hydrides can be a solution for preheating fuel cells (FCs). They can provide thermal energy at temperatures below -20 °C during startup, while heat at 50 °C during operation is sufficient for regeneration. The challenge of such a system in mobile applications is the final weight specific thermal power. In this study, a reactor design based on additive manufacturing techniques for ~300 g of metal hydride is presented. Here, a reactor (passive) to hydride (active) mass ratio of 0.97 is realized, still reaching high weight specific thermal power of up to 2.1 kW/kgMH at -20 °C and 8 bar (LmNi4.91Sn0.15). Considering the example of preheating a FC from -20 °C in ~120 s, the performance of LaNi5 and LmNi4.91Sn0.15 is studied. While LaNi5 requires higher regeneration temperatures than LmNi4.91Sn0.15 (>40 °C compared to >20 °C), its performance is less sensitive to operative variations due to its nearly ideal thermodynamic characteristic.

Item URL in elib:https://elib.dlr.de/143276/
Document Type:Article
Title:Lightweight reactor design by additive manufacturing for preheating applications using metal hydrides
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bürger, Ingainga.buerger (at) dlr.deUNSPECIFIED
Sourmelis Terzopoulos, Venizelos EleftheriosVenizelos.SourmelisTerzopoulos (at) dlr.deUNSPECIFIED
Kölbig, Milamila.koelbig (at) dlr.deUNSPECIFIED
Brack, ChristianChristian.Brack (at) dlr.deUNSPECIFIED
Linder, Marc PhilippMarc.Linder (at) dlr.deUNSPECIFIED
Journal or Publication Title:International Journal of Hydrogen Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1016/j.ijhydene.2021.06.091
Page Range:pp. 28686-28699
Keywords:metal hydrides, preheating, high thermal power, additive manufacturing, fuel cell cargo bike
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Antriebssystem und Energiemanagement
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Thermal Process Technology
Deposited By: Bürger, Inga
Deposited On:29 Oct 2021 11:11
Last Modified:24 May 2022 23:47

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