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Numerical optimization of a plate reactor for a metal hydride open cooling system

Weckerle, Christoph and Bürger, Inga and Linder, Marc Philipp (2019) Numerical optimization of a plate reactor for a metal hydride open cooling system. International Journal of Hydrogen Energy. Elsevier. DOI: 10.1016/j.ijhydene.2019.04.260 ISSN 0360-3199 (In Press)

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Abstract

Open cooling systems based on metal hydrides (MH) are promising as they are purely driven by the on-board available compression work of the compressed hydrogen in a fuel cell vehicle. In this study, the plate reactor is numerically optimized for fast reaction dynamics leading to an increased power density. Experimental results for the thermodynamic characterization of the applied Hydralloy C2 (Ti_0.98 Zr_0.02 V_0.41 Fe_0.09 Cr_0.05 Mn_1.46) in the temperature range of 0 to 50°C and a mathematical expression for the pressure–concentration isotherms are presented. The model is validated with data from the experimental literature for different cooling temperatures (15–25°C) and electrical fuel cell powers (4–6 kW). As the reactor alternately passes through two temperature levels in its continuous operation, the effects of thermal losses are evaluated in detail. The optimum thickness for the MH bed is close to the channel thickness of a commercially available reactor. A further increase of the cooling power can be obtained by reducing the distance of the hydrogen gas transport, porosity of the MH bed, and fuel cell backpressure.

Item URL in elib:https://elib.dlr.de/127595/
Document Type:Article
Title:Numerical optimization of a plate reactor for a metal hydride open cooling system
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Weckerle, ChristophChristoph.Weckerle (at) dlr.deUNSPECIFIED
Bürger, Ingainga.buerger (at) dlr.deUNSPECIFIED
Linder, Marc PhilippMarc.Linder (at) dlr.deUNSPECIFIED
Date:May 2019
Journal or Publication Title:International Journal of Hydrogen Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.ijhydene.2019.04.260
Editors:
EditorsEmail
Veziroğlu, Turhan NejatUNSPECIFIED
Publisher:Elsevier
ISSN:0360-3199
Status:In Press
Keywords:Metal hydrides Thermodynamic characterization of Hydralloy C2 Plate reactor Cooling system Fuel cell vehicles
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: Weckerle, Christoph
Deposited On:12 Jul 2019 12:44
Last Modified:25 Jul 2019 17:17

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