Title: Two-phase dynamic modeling of the PEMFCs and simulation of cyclo-voltammograms
Authors : Ziegler, Christoph
Yu, Hong Mei
Schumacher, Jürgen
Published in : Journal of the Electrochemical Society
Volume(Issue) : 152
Issue : 8
Pages : 1555
Pages to: 1567
Publisher / Ed. Institution : Electrochemical Society
Issue Date: 2005
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Fuel cells; Dynamic modelling; Pemfc; Simulation
Subject (DDC) : 621.3: Electrical engineering and electronics
Abstract: A mathematical model is developed that is based on a coupled system of partial differential equations. The model contains a dynamic and two-phase description of the proton exchange membrane fuel cell (PEMFC) and a membrane model that accounts for Schroeder’s paradox. The mass transport in the gas phase and in the liquid phase is considered as well as the phase transition between liquid water and water vapor. The transport of charges and the electrochemical reactions are part of the model. A potential sweep experiment is simulated using the mathematical model and measured using a test cell with an active area of 1cm2 . In this way, the dynamic effect of liquid water formation and transport on the current-voltage characteristic of the fuel cell is investigated. A hysteresis effect is found in the measured time-dependent current-voltage relation. The limiting current density is time-dependent. Qualitative agreement of simulated and measured results is achieved. An analysis of the observed hysteresis of the current-voltage characteristics, based on the modeling results, is given.
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Publication type: Article in scientific Journal
DOI : 10.1149/1.1946408
ISSN: 0013-4651
1945-7111
URI: https://digitalcollection.zhaw.ch/handle/11475/11579
Appears in Collections:Publikationen School of Engineering

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