3-D model calculation for planar SOFC

Yakabe, H.; Ogiwara, T.; Hishinuma, Masakazu; Yasuda, Isamu

doi:10.1016/s0378-7753(01)00792-3

Cited by 349 publications

(211 citation statements)

References 9 publications

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“…While experimental studies mostly focus on the evaluation of possible materials and/or fuels, numerical studies focus on modeling the coupled physical and chemical and electrochemical phenomena occurring in the cell/stack. Some studies have used three-dimensional (3D) approaches to model the whole cell/stack (Pasaogullari and Wang, 2003;Petruzzi et al, 2003;Recknagle et al, 2003;Yakabe et al, 2001). In such studies the impact of the configuration and operating conditions (e.g.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of solid oxide fuel cells

Kosinski

Hoffmann

et al. 2008

Chemical Engineering Science

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This paper presents a numerical model for a planar solid oxide fuel cell (SOFC) with mixed ionic-electronic conducting electrodes. Transport of positive or negative charges, which takes place in the direction of down-or up-gradient electric potential, respectively, within the composite electrodes and through the electrolyte membrane, is mimicked by making use of an algorithm for Fickian diffusion in the commercial software. The output cell voltage, which is the potential difference between the two current collectors, is fixed at a given value. The coupled equations describing the conservation of mass, momentum and energy and the chemical and electrochemical processes are solved using the commercial package Star-CD, augmented with subroutines developed in-house. Results for the concentration of chemical species and the distributions of temperature and current density in an anode-supported SOFC with direct internal reforming are presented and discussed. The potential for using this model as a general numerical tool to study the impact of the detailed processes taking place in solid oxide fuel cells is discussed.

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Section: Introductionmentioning

confidence: 99%

Numerical modeling of solid oxide fuel cells

Kosinski

Hoffmann

et al. 2008

Chemical Engineering Science

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“…In addition, internal reforming of hydrocarbons can be carried out in the anode and they have significantly lower emissions of sulphur oxides, nitrogen oxides and carbon dioxide com-pared to conventional power generation devices [5] [6] [7].…”

Section: Introductionmentioning

confidence: 99%

An Isothermal Study of the Electrochemical Performance of Intermediate Temperature Solid Oxide Fuel Cells

Ighodaro¹,

Scott²,

Lü³

2017

JPEE

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A two-dimensional along the channel micro-scale isothermal model of a SOFC is developed and validated against experimental data and other simulated results from literature. The steady state behaviour of the cell was determined by numerical solution of the combined transport, continuity and kinetic equations. An important characteristic of the model is the consideration of the triple phase boundary as a distinct layer. The model is capable of predicting the cell performance including polarisation behaviour and power output. The model is used to study the effect of the support structure, geometric parameters and the effect of operating conditions on cell performance. Several parametric studies include the effect of operating conditions and geometric parameters on cell performance with a view to optimising the cell. The simulation results showed that the anode supported SOFC displayed the best performance with the activation and ohmic overpotentials being responsible for most of the voltage losses in the cell.

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“…However, the operating parameters can be easily adjusted to obtain desired gas composition to favor electrochemical reactions in SOFC [12][13][14]. For comparison, direct internal reforming (DIR) of methane in SOFC eliminates the need of external fuel processors and thus reduces the system cost and complexity [15][16][17][18][19][20]. However, the occurrence of chemical reactions (endothermic DIR and exothermic water gas shift reaction: WGSR) complicate the SOFC temperature field and more importantly, carbon deposition can occur in an SOFC with DIR and WGS, which in turn can degrade the SOFC performance substantially [21].…”

Section: Introductionmentioning

confidence: 99%

Modeling of SOFC running on partially pre-reformed gas mixture

2012

International Journal of Hydrogen Energy

117

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A two dimensional model is developed to study the transport and reaction processes in solid oxide fuel cells (SOFCs) fueled by partially pre-reformed gas mixture, considering the direct internal reforming (DIR) of methane and water gas shift (WGS) reaction in the porous anode of SOFC.Electrochemical oxidations of H 2 and CO fuels are both considered. The model consists of an electrochemical, a chemical model, and a computational fluid dynamics (CFD) model. Two chemical models are compared to examine their effects on SOFC modeling results. Different from the previous studies on hydrogen fueled SOFC, higher gas velocity is found to slightly decrease the performance of SOFC running on pre-reformed gas mixture, due to suppressed gas composition variation at a higher gas velocity. The current density distribution along the gas channels at an inlet temperature of 1173K is quite different from that at 1073K, as DIR reaction is facilitated at a higher temperature. It is also found that neglecting the electrochemical oxidation of CO can considerably underestimate the total current density of SOFC running on pre-reformed hydrocarbon fuels. An alternative method is proposed to numerically determine the open-circuit potential of SOFC running on hydrocarbon fuels. Electrochemical reactions are observed at open-circuit potentials.

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3-D model calculation for planar SOFC

Cited by 349 publications

References 9 publications

Numerical modeling of solid oxide fuel cells

Numerical modeling of solid oxide fuel cells

An Isothermal Study of the Electrochemical Performance of Intermediate Temperature Solid Oxide Fuel Cells

Modeling of SOFC running on partially pre-reformed gas mixture

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