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Simple Numerical Model for the Cathodic Two-Phase Gas Flow of a PEFC

Knöri, Torsten and Gülzow, Erich and Schulze, Mathias (2005) Simple Numerical Model for the Cathodic Two-Phase Gas Flow of a PEFC. In: 3rd European PEFC Forum. 3rd European PEFC Forum, 2005-07-04 - 2005-07-08, Luzern, Schweiz.

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Abstract

In this contribution a simple, isothermal, two-phase model for the calculation of the cathodic gas flow along the flow field channels of a polymer electrolyte fuel cell (PEFC) will be presented. The composition of the oxidant gas (including water content), average gas velocity, pressure drop and other quantities can be calculated for different gas distributor structures. Thereby, the model requires several input parameters determined by experiment and operation conditions, e.g. the water content of the feed gas, local current densities and gas flow rates. In contrast to other models, the cross-section reduction has been taken into account which results from the penetration of the gas diffusion layer (GDL) into the flow field channels due to the mounting pressure. In addition, the model needs no parameters for adjustment. This combined modelling and experimental investigations gives a better understanding of the local processes inside the cell. In the presentation the results of this model for a 25 cm2 serpentine flow field at different operation modes will be shown.

Item URL in elib:https://elib.dlr.de/43900/
Document Type:Conference or Workshop Item (Paper, Poster)
Title:Simple Numerical Model for the Cathodic Two-Phase Gas Flow of a PEFC
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Knöri, TorstenUNSPECIFIEDUNSPECIFIED
Gülzow, ErichUNSPECIFIEDUNSPECIFIED
Schulze, MathiasUNSPECIFIEDUNSPECIFIED
Date:2005
Journal or Publication Title:3rd European PEFC Forum
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:PEFC, Simulation, current density distribution
Event Title:3rd European PEFC Forum
Event Location:Luzern, Schweiz
Event Type:international Conference
Event Dates:2005-07-04 - 2005-07-08
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: Schulze, Dr.rer.nat. Mathias
Deposited On:27 Nov 2006
Last Modified:27 Apr 2009 12:56

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