Title: Experimental parameter uncertainty in PEM fuel cell modeling
Authors : Vetter, Roman
Herrendörfer, Robert
Schumacher, Jürgen O.
Proceedings: Abstracts
Conference details: 8th International Conference on Fundamentals & Development of Fuel Cells FDFC2019, in Nantes, France, February 12th to February 14th, 2019
Publisher / Ed. Institution : Université de Nantes
Publisher / Ed. Institution: Nantes, France
Issue Date: 2019
License (according to publishing contract) : Not specified
Type of review: Editorial review
Language : English
Subjects : Proton exchange membrane fuel cell; Modeling and simulation; Parameter uncertainty
Subject (DDC) : 621.3: Electrical engineering and electronics
Abstract: Predictability of proton exchange membrane fuel cell (PEMFC) models has suffered from significant uncertainty in material properties with experimental data on several transport coefficients being scattered over orders of magnitude. In this study, we determine the most critical transport parameters for which a more accurate experimental characterization is required to enable reliable performance prediction. First, we incorporate a comprehensive set of material parameterizations from the literature into a recently developed macro-homogeneous two-phase membrane-electrode assembly model [1]. This computational model demonstrates the large spread in performance prediction resulting from the scattered experimental data. Membrane transport properties induce the largest spread in the fuel cell performance curve: the diffusivity of dissolved water, the protonic conductivity and the electro-osmotic drag coefficient. Second, we conduct extensive forward uncertainty propagation analyses. These include a global sensitivity analysis in which a broad range of operating conditions and material properties is covered. By introducing the concept of condition numbers to fuel cell modeling, we measure the propagation of uncertainty through the model explicitly. We list the parameters with the highest impact on predicted fuel cell properties. These are the membrane hydration isotherm, the electro-osmotic drag coefficient, the membrane thickness and the diffusivity of dissolved water. In conclusion, the most critical model parameters are the membrane transport properties, which suffer from the largest scatter in available experimental data. This calls for a better experimental characterization of the ionomer to enhance the predictability of PEMFC models. Particularly, a more precise parametrization is required for the interplay between the different water transport mechanisms and protonic conductivity. Acknowledgements This work was supported by the Swiss National Science Foundation [project no. 153790, grant no. 407040_153790]; the Swiss Commission for Technology and Innovation [contract no. KTI.2014.0115]; the Swiss Federal Office of Energy; and through the Swiss Competence Center for Energy Research (SCCER Mobility).
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Publication type: Conference Other
URI: https://fdfc2019.sciencesconf.org/
Published as part of the ZHAW project : Neue Charakterisierungsmethoden von Brennstoffzellenstacks für den Einsatz im Automobilbereich (ACTIF)
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