CFD model of a methane fuelled single cell SOFC stack for analysing the combined effects of macro/micro structural parameters

A fully coupled CFD model of a direct internal reforming single cell SOFC stack previously designed by Ceramic Fuel Cell Ltd (CFCL) has been developed. In this model, an innovative solution technique for accelerating finite volume treatment of the electrodes as two distinct layers, a diffusion layer and a catalyst layer, is taken to analyse the combined effects of the macro/microstructural parameters on distribution of fields and each of the reactions involved in the process. To assess the simulation results, the model is not only evaluated with the CFCL experimental data that was reported from the similar geometry, but it is also assessed for the effects of the reforming and water gas shift reactions. It is found that a 3D model is more representative of the global reforming reaction rate. Furthermore, distributions of the key parameters along different spatial domains disclose the complex interaction between the anode flow field design and microstructural parameters of the anode diffusion layer. In fact, an optimal set of the anode microstructure that promotes the reforming reaction rate will not automatically result in improved SOFC performance. The developed model is a powerful tool to study complex fuel cell related problems and to optimize fuel cells’ structure.

[1]  N. Woudstra,et al.  Three-dimensional thermo-fluid and electrochemical modeling of anode-supported planar solid oxide fuel cell , 2010 .

[2]  Yunzhen Yang,et al.  Effects of operations and structural parameters on the one-cell stack performance of planar solid oxide fuel cell , 2009 .

[3]  Dennis Y.C. Leung,et al.  Electrochemical modeling and parametric study of methane fed solid oxide fuel cells , 2009 .

[4]  N. Woudstra,et al.  Three-dimensional computational fluid dynamics modeling of anode-supported planar SOFC , 2011 .

[5]  M. Khaleel,et al.  Three-dimensional thermo-fluid electrochemical modeling of planar SOFC stacks , 2003 .

[6]  R. Hughes,et al.  The kinetics of methane steam reforming over a Ni/α-Al2O catalyst , 2001 .

[7]  Yoshio Matsuzaki,et al.  Evaluation and modeling of performance of anode-supported solid oxide fuel cell , 2000 .

[8]  Yixiang Shi,et al.  Modeling of an anode-supported Ni–YSZ|Ni–ScSZ|ScSZ|LSM–ScSZ multiple layers SOFC cell: Part I. Experiments, model development and validation , 2007 .

[9]  A. Chaisantikulwat,et al.  Dynamic modelling and control of planar anode-supported solid oxide fuel cell , 2008, Comput. Chem. Eng..

[10]  Moses O. Tadé,et al.  A CFD-based model of a planar SOFC for anode flow field design , 2009 .

[11]  Junxiang Shi,et al.  Inverse Estimation of Electrode Microstructure Distributions in NASA Bi-Electrode Supported Solid Oxide Fuel Cells , 2012 .

[12]  K. Ahmed,et al.  Kinetics of internal steam reforming of methane on Ni/YSZ-based anodes for solid oxide fuel cells , 2000 .

[13]  B. Haberman,et al.  Three-dimensional simulation of chemically reacting gas flows in the porous support structure of an integrated-planar solid oxide fuel cell , 2004 .

[14]  Aristide F. Massardo,et al.  Internal Reforming Solid Oxide Fuel Cell-Gas Turbine Combined Cycles (IRSOFC-GT): Part A—Cell Model and Cycle Thermodynamic Analysis , 2000 .

[15]  Don W. Green,et al.  Perry's Chemical Engineers' Handbook , 2007 .

[16]  V. Antonucci,et al.  Micro-modelling of solid oxide fuel cell electrodes , 1998 .

[17]  Yongping Yang,et al.  Investigation of methane steam reforming in planar porous support of solid oxide fuel cell , 2009 .

[18]  Moses O. Tadé,et al.  Improved Tank in Series Model for the Planar Solid Oxide Fuel Cell , 2011 .

[19]  W. Lehnert,et al.  Structural properties of SOFC anodes and reactivity , 1998 .

[20]  A. Abbaspour,et al.  Three-dimensional random resistor-network model for solid oxide fuel cell composite electrodes , 2010 .

[21]  Ibrahim Dincer,et al.  A general electrolyte–electrode-assembly model for the performance characteristics of planar anode-supported solid oxide fuel cells , 2009 .

[22]  Yann Bultel,et al.  Modeling of a SOFC fuelled by methane: From direct internal reforming to gradual internal reforming , 2007 .

[23]  L. Schaefer,et al.  A numerical model coupling the heat and gas species' transport processes in a tubular SOFC , 2004 .

[24]  D. Favrat,et al.  CFD simulation tool for solid oxide fuel cells , 2004 .

[25]  Vinod M. Janardhanan,et al.  Modeling Elementary Heterogeneous Chemistry and Electrochemistry in Solid-Oxide Fuel Cells , 2005 .

[26]  D. Jeon.  A comprehensive CFD model of anode-supported solid oxide fuel cells , 2009 .

[27]  S. S. Shy,et al.  Parametric study of anodic microstructures to cell performance of planar solid oxide fuel cell using measured porous transport properties , 2010 .

[28]  Timo Kivisaari,et al.  Conceptual study of a 250 kW planar SOFC system for CHP application , 2004 .

[29]  Ibrahim Dincer,et al.  Multi‐component mathematical model of solid oxide fuel cell anode , 2005 .

[30]  D. Leung,et al.  Modeling of methane fed solid oxide fuel cells: Comparison between proton conducting electrolyte and oxygen ion conducting electrolyte , 2008 .

[31]  Junxiang Shi,et al.  CFD analysis of a symmetrical planar SOFC with heterogeneous electrode properties , 2010 .

[32]  C. Adjiman,et al.  Anode-supported intermediate temperature direct internal reforming solid oxide fuel cell. I: model-based steady-state performance , 2004 .

[33]  I. Dincer,et al.  Mathematical modeling of planar solid oxide fuel cells , 2006 .

[34]  Bengt Sundén,et al.  Analysis of parameter effects on chemical reaction coupled transport phenomena in SOFC anodes , 2009 .

[35]  Biao Huang,et al.  Dynamic modeling of solid oxide fuel cell: The effect of diffusion and inherent impedance , 2005 .

[36]  E. Riensche,et al.  Methane/steam reforming kinetics for solid oxide fuel cells , 1994 .

[37]  Weeratunge Malalasekera,et al.  An introduction to computational fluid dynamics - the finite volume method , 2007 .

[38]  Emmanuel Kakaras,et al.  Comparison between two methane reforming models applied to a quasi-two-dimensional planar solid oxide fuel cell model , 2009 .

[39]  Amornchai Arpornwichanop,et al.  Performance of an anode-supported solid oxide fuel cell with direct-internal reforming of ethanol , 2009 .

[40]  S. Campanari,et al.  Comparison of Finite Volume SOFC Models for the Simulation of a Planar Cell Geometry , 2005 .