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dc.contributor.authorWlodarczyk, Jakub-
dc.contributor.authorCantu, Brenda-
dc.contributor.authorFischer, Peter-
dc.contributor.authorKüttinger, Michael-
dc.contributor.authorSchumacher, Jürgen-
dc.descriptionAcknowledgements: This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement no. 765289. *Project website: www.flowcamp-project.eude_CH
dc.description.abstractOne of the flow battery systems which utilizes abundantly available chemicals for electrolytes, characterized by high power density, is the hydrogen-bromine flow battery. First proposed in 1969 [1], it has recently received new attention and has been undergoing development, in which numerical simulations play an important role. To date, a few papers devoted to modeling and simulation of this particular new-generation flow battery chemistry were published. In the present work, a one-dimensional (1D), steady-state, macrohomogeneous, mathematical model of a single-cell hydrogen-bromine flow battery (HBFB) is developed, described and solved. It comprises of the most relevant transport through-plane processes and electrochemical phenomena for the operation of the HBFB, namely: charge transport, water, gaseous hydrogen, proton, bromine and (tri)bromide mass transport. Furthermore, the model is enhanced with supplementary phenomena to better approximate the physics described in the simulation such as: bromine-tribromide ionic equilibria, Nernstian losses due to reactant local surface concentration variations, Donnan potential on the HBr/Br2 solution-membrane interface, and gas adsorption in the ionomer on the gaseous hydrogen side according to Henry’s law. The model description emphasizes the importance of electrochemical and flux sign conventions, and the meaning of appropriate boundary conditions, which was seldom the case in the published modeling approaches. A complete set of plots of each dependent variable and the associated fluxes are provided. A system of nonlinear second-order partial differential equations describing the problem is solved using COMSOL Multiphysics software with the General PDE Form module for a better control over the actual governing equations (conservation laws) as well as auxiliary algebraic field equations. The 1D approach allows for solving the problem within seconds on a laptop-class computer and permits running multiple case studies within short time. Moreover, a parametric study is performed (Fig. 1) to examine the impact of selected parameters on the overall performance of a single cell. The validity of the model is verified based on results from a set of experiments carried out at Fraunhofer ICT (internal, multidisciplinary cooperation within the Flowcamp* project) using an isothermal single test cell.de_CH
dc.publisherTechnische Universität Braunschweigde_CH
dc.rightsNot specifiedde_CH
dc.subjectHydrogen-bromine redox flow batteryde_CH
dc.subjectModeling and simulationde_CH
dc.subject.ddc621.3: Elektrotechnik und Elektronikde_CH
dc.titleAn enhanced 1-D model of a hydrogen-bromine flow batteryde_CH
dc.typeKonferenz: Posterde_CH
zhaw.departementSchool of Engineeringde_CH
zhaw.organisationalunitInstitute of Computational Physics (ICP)de_CH
zhaw.conference.detailsModVal 2019, Braunschweig, Germany, 12-13 March 2019de_CH
zhaw.funding.euinfo:eu-repo/grantAgreement/EC/H2020/765289// European Training Network to improve materials for high-performance, low-cost next- generation redox-flow batteries/FlowCampde_CH
zhaw.parentwork.editorKrewer, Ulrike-
zhaw.parentwork.editorLaue, Vincent-
zhaw.parentwork.editorRedeker, Andreas-
zhaw.publication.reviewEditorial reviewde_CH
zhaw.title.proceedings16th symposium on modeling and experimental validation of electrochemical energy technologies (ModVal 2019) : book of abstractsde_CH
zhaw.webfeedErneuerbare Energiende_CH
zhaw.funding.zhawRedox Flow Battery Campusde_CH
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