Performance Comparison on Cross-Flow and Counter-Flow Planar Solid Oxide Fuel Cell

Solid oxide fuel cell (SOFC) is a complicated system with heat and mass transfer as well as electrochemical reactions. The flow configuration has great impact on the system performance. Based on the established one dimensional direct internal reforming SOFC mathematical model, with the consideration of the flow, thermal and electrical characteristic, this paper developed the two dimensional mathematical model for both counter-flow and cross-flow types. Plus, the comparison and analysis of the steady distribution are performed. The results reveal that on the geometry parameters and inlet conditions, the outlet temperatures of counter-flow SOFC are lower than that of cross-flow. However, the average temperature of PEN plate is higher than cross-flow, and both the operating voltage and electric efficiency are also higher than that of cross-flow. This will be beneficial for the structure design of SOFC.

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Control structure design and dynamic modeling for a solid oxide fuel cell with direct internal reforming of methane

Chemical Engineering Research and Design ◽

10.1016/j.cherd.2015.04.029 ◽

2015 ◽

Vol 98 ◽

pp. 202-211 ◽

Cited By ~ 19

Author(s):

Narissara Chatrattanawet ◽

Sigurd Skogestad ◽

Amornchai Arpornwichanop

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Dynamic Modeling ◽

Control Structure ◽

Structure Design ◽

Solid Oxide ◽

Oxide Fuel ◽

Internal Reforming ◽

Direct Internal Reforming

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A microstructure-oriented mathematical model of a direct internal reforming solid oxide fuel cell

Energy Conversion and Management ◽

10.1016/j.enconman.2020.112826 ◽

2020 ◽

Vol 213 ◽

pp. 112826 ◽

Cited By ~ 1

Author(s):

Grzegorz Brus ◽

Piotr F. Raczkowski ◽

Masashi Kishimoto ◽

Hiroshi Iwai ◽

Janusz S. Szmyd

Keyword(s):

Mathematical Model ◽

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Solid Oxide ◽

Oxide Fuel ◽

Internal Reforming ◽

Direct Internal Reforming

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Modelling of a Monolithic Solid Oxide Fuel Cell

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.750-752.1718 ◽

2013 ◽

Vol 750-752 ◽

pp. 1718-1733

Author(s):

G.J. Williams ◽

Y. K. Chen ◽

F.S. Bhinde

Keyword(s):

Mathematical Model ◽

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Fluid Dynamic ◽

Potential Temperature ◽

Cross Flow ◽

Solid Oxide ◽

Design Stage ◽

Oxide Fuel ◽

Cathodic Material

The paper presents a bespoke mathematical model that simulates the electrochemical, thermal and fluid-dynamic interactions in a solid oxide fuel cell. This model is created for the purpose of evaluating and optimising a novel SOFC architecture. The proprietary fuel cell design consists of cathode supported cross-flow monolithic flow channels of hexagonal honeycomb section. The monolithic cells are constructed from porous cathodic material, with porous anodic and dense electrolytic material deposited inside specific hexagons such that any anodic cell is surrounded by six cathodic cells. Current collection is achieved by bus-plating on the monolith perpendicular to the direction of flow, and using thin interconnects attached to a corner of an anodic cell. The mathematical model considers a single side of the hexagon to simulate electrochemical interactions combined with heat and mass transfer. The finite difference technique is applied to predict numerically from a given current value voltage potential, temperature, fuel and oxidant compositions and partial pressures at the electrolyte/electrode interfaces. The model can be treated as a small segment of any geometry, thus can be, with added complexities of non-uniformity in surface thickness, extended to other shapes, and therefore used as an aid at the design stage to choose the values of geometric variables such as electrode and electrolyte thickness, etc.

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Application of an Anode Model to Investigate Physical Parameters in an Internal Reforming Solid-Oxide Fuel Cell

Journal of Fuel Cell Science and Technology ◽

10.1115/1.1895925 ◽

2005 ◽

Vol 2 (2) ◽

pp. 136-140 ◽

Cited By ~ 8

Author(s):

Eric S. Greene ◽

Maria G. Medeiros ◽

Wilson K. S. Chiu

Keyword(s):

Fuel Cell ◽

Solid Oxide Fuel Cell ◽

Structural Parameters ◽

Porous Electrode ◽

Cell Voltage ◽

Solid Oxide ◽

Physical Parameters ◽

Oxide Fuel ◽

Internal Reforming ◽

Porous Anode

A one-dimensional model of chemical and mass transport phenomena in the porous anode of a solid-oxide fuel cell, in which there is internal reforming of methane, is presented. Macroscopically averaged porous electrode theory is used to model the mass transfer that occurs in the anode. Linear kinetics at a constant temperature are used to model the reforming and shift reactions. Correlations based on the Damkohler number are created to relate anode structural parameters and thickness to a nondimensional electrochemical conversion rate and cell voltage. It is shown how these can be applied in order to assist the design of an anode.

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