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Development Work for the 130 °C-PEFC-Stack

Knöri, Torsten and Gülzow, Erich (2011) Development Work for the 130 °C-PEFC-Stack. In: Conference Proceedings of the European Fuel Cell Technology & Application Piero Lunghi Conference & Exhibition 2011, pp. 169-170. ENEA-Italian National Agency for Technologies, Energy and sustainable economic Development. European Fuel Cell Technology & Application Piero Lunghi Conference & Exhibition 2011, 14.-16. Dez. 2011, Rom, Italien. ISBN 978-88-8286-254-1

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Abstract

At the DLR Institute of Technical Thermodynamics new concepts for fuel cell stacks are being developed for various applications and load profiles. Thereby, the main focus lies on the simplification of the stacks for reaching a cost reduction as well as an increase of the (volumetric) power density. Today’s polymer electrolyte fuel cells (PEFCs) are applicable only within a limited operating range. This limitation restricts the spectrum of possible applications and hinders their flexibility during operation. Hence, one of the most important targets in fuel cell research is to enlarge the range of the operating temperature. Thereby, the continuous operation at elevated temperatures or an extended temperature range for a limited time comes into consideration. In order to avoidcritical operating conditions, to ascertain a sufficient durability and performance of a fuel cell stack, special concepts regarding the bipolar plates, the cooling strategy, the membrane electrode assemblies as well as a closer look on the water management are essential. Furthermore, the operating strategy of the stack has to be adapted with respect to all of the stacks’ components. In this way, operating temperatures from 60 up to 130 °C can be realized. A cold starting is feasible from -20 °C, even if during the start-up procedure the total net power can not be supplied right from the beginning. An elevated temperature range shall be applicable for short durations of approximately 1 hour. In addition, the DLR measurement technique for the determination of local current density distribution (PCB technology) is implemented in the fuel cell stacks for extending the life-time of the stacks by an adapted control strategy. The fulfilment of these “boundary” conditions leads to an improved operational flexibil-ity of polymer electrolyte fuel cell stacks, especially in the stationary and mobile sector.

Item URL in elib:https://elib.dlr.de/72514/
Document Type:Conference or Workshop Item (Speech)
Title:Development Work for the 130 °C-PEFC-Stack
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knöri, TorstenTorsten.Knoeri (at) dlr.deUNSPECIFIED
Gülzow, ErichErich.Guelzow (at) dlr.deUNSPECIFIED
Date:14 December 2011
Journal or Publication Title:Conference Proceedings of the European Fuel Cell Technology & Application Piero Lunghi Conference & Exhibition 2011
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 169-170
Editors:
EditorsEmail
ENEA-Italian National Agency for Technologies, Energy and sustainable economic Development, UNSPECIFIED
Universität Perugia, UNSPECIFIED
Publisher:ENEA-Italian National Agency for Technologies, Energy and sustainable economic Development
ISBN:978-88-8286-254-1
Status:Published
Keywords:PEFC, Fuel Cell, Stack
Event Title:European Fuel Cell Technology & Application Piero Lunghi Conference & Exhibition 2011
Event Location:Rom, Italien
Event Type:international Conference
Event Dates:14.-16. Dez. 2011
Organizer:ENEA-Nationale italienische Energie- und Umweltagentur; Universität Perugia
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E BZ - Fuel cells (old)
DLR - Research area:Energy
DLR - Program:E BZ - Fuel cells
DLR - Research theme (Project):E - Membran-Brennstoffzellen (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Knöri, Torsten
Deposited On:17 Jul 2012 13:39
Last Modified:17 Jul 2012 13:39

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