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The impact of operating parameters and system architecture on the water management of a multifunctional PEMFC system

Busemeyer, Lucas and Werner, Claudia and Kallo, Josef (2015) The impact of operating parameters and system architecture on the water management of a multifunctional PEMFC system. International Journal of Hydrogen Energy. Elsevier. DOI: 10.1016/j.ijhydene.2015.02.012 ISSN 0360-3199

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Abstract

The focus of this paper is on multifunctional PEMFC application considering the products electric power and oxygen depleted air (ODA) to be used in aviation. Presented are operation and architecture analyses of a PEMFC system (HyPM XR 12) based on process simulations as well as experimental investigations. The effects of the stack temperature (20–90 °C), the operating pressure (0.2–2.0 bar) and the cathode stoichiometric ratio (1.0–5.0) on the resulting average relative humidity of the cathode exhaust gas and consequently on the efficiency and stability are evaluated for a single and a highly innovative twin system (serial cathode including an interim condensation process). The results achieved are used to identify operation and architecture improvements for an appropriate water management, a key aspect to optimize efficiency and stability of PEMFC systems [1]. Based on the process simulation and experimental investigations can be summarized: In single and twin system operation the stack temperature and the cathode stoichiometric ratio have to be decreased at reduced operating pressure to avoid membrane dehydration. An additional feed gas humidification could be appropriate, especially at low pressure operation. The twin system architecture is relevant to minimize fuel cell flooding at high operating pressure and low stoichiometric ratios required to achieve ODA specifications.

Item URL in elib:https://elib.dlr.de/96725/
Document Type:Article
Title:The impact of operating parameters and system architecture on the water management of a multifunctional PEMFC system
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Busemeyer, Lucaslucas.busemeyer (at) dlr.deUNSPECIFIED
Werner, Claudiaclaudia.werner (at) dlr.deUNSPECIFIED
Kallo, Josefjosef.kallo (at) dlr.deUNSPECIFIED
Date:28 February 2015
Journal or Publication Title:International Journal of Hydrogen Energy
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.1016/j.ijhydene.2015.02.012
Publisher:Elsevier
ISSN:0360-3199
Status:Published
Keywords:PEMFC; Water management; Membrane humidification; Oxygen concentration; Efficiency; Aviation
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Busemeyer, Lucas
Deposited On:29 Jul 2015 09:52
Last Modified:31 Jul 2019 19:53

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