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dc.contributor.authorSchmitz, Andreas-
dc.contributor.authorZiegler, Christoph-
dc.contributor.authorSchumacher, Jürgen-
dc.contributor.authorTranitz, Marco-
dc.date.accessioned2018-10-11T13:14:54Z-
dc.date.available2018-10-11T13:14:54Z-
dc.date.issued2006-09-
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/11669-
dc.description.abstractA mathematical model of an air-breathing PEMFC and its validation is presented. The aim of this work is to gain an understanding of the physical and electrochemical processes in an air-breathing PEMFC with an open cathode. The model is stationary and non-isothermal. The model geometry represents a two-dimensional symmetry element of the air-breathing sample cells that were used for the measurements. Multicomponent Stefan-Maxwell diffusion is used to describe the mass transport of the gaseous components (O2, H2O, N2) within the gas diffusion layer, the catalyst layer and the void space above the open cathode. Moreover, the model takes into account the exchange of water through the membrane due to diffusion and electro-osmotic drag, the charge transport of protons and electrons as well as the heat balance effects. Some of the heat balance effects include heat sources caused by irreversible losses and heat exchange to the exterior due to convective heat transport. The electrochemical reactions in the catalyst layer are described by an agglomerate model which takes into account the reaction and diffusion within the agglomerations of catalyst and electrolyte. The description of the mass transport of the gaseous components on the anodic side (H2, H2O) has been simplified by using Fickean diffusion. Calculations with this model are performed for cathodes with opening ratios of 33%, 50% and 80%.The experiments are made with three air-breathing sample cells having the aforementioned opening ratios. Each cell is characterised under floating temperature conditions by measurement of the current-voltage curve as well as measurements of the cell temperature and the cell impedances at 1 kHz. The model is validated by comparison of the measured current-voltage characteristics with the model predictions. Moreover, the ionic cell resistance that is predicted by the model agrees with experimental results for low hydrogen stoichiometry.de_CH
dc.language.isoende_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectModelingde_CH
dc.subjectPemfcde_CH
dc.subjectCharacterisationde_CH
dc.subject.ddc540: Chemiede_CH
dc.titleModelling air-breathing PEMFC and validation by experimental characterisationsde_CH
dc.typeKonferenz: Sonstigesde_CH
dcterms.typeTextde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Computational Physics (ICP)de_CH
zhaw.conference.detailsFuel Cell Science and Technology Conference, Turin, Italy, 13-14 September 2006de_CH
zhaw.funding.euNode_CH
zhaw.originated.zhawYesde_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.publication.reviewNot specifiedde_CH
Appears in collections:Publikationen School of Engineering

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Schmitz, A., Ziegler, C., Schumacher, J., & Tranitz, M. (2006, September). Modelling air-breathing PEMFC and validation by experimental characterisations. Fuel Cell Science and Technology Conference, Turin, Italy, 13-14 September 2006.
Schmitz, A. et al. (2006) ‘Modelling air-breathing PEMFC and validation by experimental characterisations’, in Fuel Cell Science and Technology Conference, Turin, Italy, 13-14 September 2006.
A. Schmitz, C. Ziegler, J. Schumacher, and M. Tranitz, “Modelling air-breathing PEMFC and validation by experimental characterisations,” in Fuel Cell Science and Technology Conference, Turin, Italy, 13-14 September 2006, Sep. 2006.
SCHMITZ, Andreas, Christoph ZIEGLER, Jürgen SCHUMACHER und Marco TRANITZ, 2006. Modelling air-breathing PEMFC and validation by experimental characterisations. In: Fuel Cell Science and Technology Conference, Turin, Italy, 13-14 September 2006. Conference presentation. September 2006
Schmitz, Andreas, Christoph Ziegler, Jürgen Schumacher, and Marco Tranitz. 2006. “Modelling Air-Breathing PEMFC and Validation by Experimental Characterisations.” Conference presentation. In Fuel Cell Science and Technology Conference, Turin, Italy, 13-14 September 2006.
Schmitz, Andreas, et al. “Modelling Air-Breathing PEMFC and Validation by Experimental Characterisations.” Fuel Cell Science and Technology Conference, Turin, Italy, 13-14 September 2006, 2006.


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