Quantification of the Radiative and Convective Heat Transfer Processes and their Effect on mSOFC by CFD Modelling

Pianko‐Oprych, Paulina; Касилова, Е. В.; Jaworski, Z.

doi:10.2478/pjct-2014-0029

Cited by 13 publications

(6 citation statements)

References 15 publications

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“…For the mass balances, the concentrated species transport equations were used assuming that species transport was dominated by the gas diffusion. Thermal energy was transferred by conduction and convection, while the radiative heat transfer was neglected due to its low impact (Pianko-Oprych et al, 2014). For the electronic and ionic charge balance the appropriate distributed charge transfer equations were applied.…”

Section: Physical and Numerical Modelmentioning

confidence: 99%

Computational Fluid Dynamics calculation of a planar solid oxide fuel cell design running on syngas

Pianko‐Oprych¹,

Zinko²,

Jaworski³

2017

Chemical and Process Engineering

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The present study deals with modelling and validation of a planar Solid Oxide Fuel Cell (SOFC) design fuelled by gas mixture of partially pre-reformed methane. A 3D model was developed using the ANSYS Fluent Computational Fluid Dynamics (CFD) tool that was supported by an additional Fuel Cell Tools module. The governing equations for momentum, heat, gas species, ion and electron transport were implemented and coupled to kinetics describing the electrochemical and reforming reactions. In the model, the Water Gas Shift reaction in a porous anode layer was included. Electrochemical oxidation of hydrogen and carbon monoxide fuels were both considered. The developed model enabled to predict the distributions of temperature, current density and gas flow in the fuel cell.

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Section: Physical and Numerical Modelmentioning

confidence: 99%

Computational Fluid Dynamics calculation of a planar solid oxide fuel cell design running on syngas

Pianko‐Oprych¹,

Zinko²,

Jaworski³

2017

Chemical and Process Engineering

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“…The model based on the coupling of balance equations for mass (1), momentum (2), species (3), and energy (4), as well as electronic charge (5) and ionic charge (6), with the electrochemical kinetics of anode and cathode reactions included in the source terms of the governing equations. Thermal energy was transferred by conduction and convection, while the radiative heat transfer was neglected due to its low impact, according to [ 17 ].…”

Section: Model Descriptionmentioning

confidence: 99%

A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel Cell

2016

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A typical operating temperature of a solid oxide fuel cell (SOFC) is quite high above 750 °C and affects the thermomechanical behavior of the cell. Thermal stresses may cause microstructural instability and sub-critical cracking. Therefore, a joint analysis by the computational fluid dynamics (CFD) and computational structural mechanics based on the finite element method (FEM) was carried out to analyze thermal stresses in a planar SOFC and to predict potential failure locations in the cell. A full numerical model was based on the coupling of thermo-fluid model with the thermo-mechanical model. Based on a temperature distribution from the thermo-fluid model, stress distribution including the von Mises stress, shear stress as well as the operating principal stress were derived in the thermo-mechanical model. The FEM calculations were performed under different working conditions of the planar SOFC. The highest total stress was noticed at the lower operating voltage of 0.3 V, while the lowest total stress was determined at the voltage of 0.7 V. The obtained stress distributions allowed a better understanding of details of internal processes occurring within the SOFC and provided helpful guidance in the optimization of a new SOFC design.

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“…The heat was transferred by conduction and convection, the radiative heat transfer was neglected due to its low impact (21). Heat source included the chemical and electrochemical reaction enthalpies and Ohmic heat.…”

Section: Modellingmentioning

confidence: 99%

Three-Dimensional Computational Fluid Dynamics Modelling for a Planar Solid Oxide Fuel Cell of a New Design

2015

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The aim of the work is to investigate the electrochemical processes of a planar Solid Oxide Fuel Cell and to estimate the performance of a novel SOFC design. The design involves cross-flow bipolar plates. Each of the bipolar plates has an air channel system on one side and a fuel channel system on the other side. One pair of channels in adjacent plates is used for the air flow along the cathode, the other for the fuel flow along the anode of each cell. A three-dimensional Computational Fluid Dynamics model for the anode-supported planar SOFC with complex bipolar plates has been developed. The distributions of temperature and gas flow through the channels and MEA structure were studied. The results identified the most susceptible areas for significant increase of the temperature at high current density, which can lead to hot spots formation and destruction of the electrodes.

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Quantification of the Radiative and Convective Heat Transfer Processes and their Effect on mSOFC by CFD Modelling

Cited by 13 publications

References 15 publications

Computational Fluid Dynamics calculation of a planar solid oxide fuel cell design running on syngas

Computational Fluid Dynamics calculation of a planar solid oxide fuel cell design running on syngas

A Numerical Investigation of the Thermal Stresses of a Planar Solid Oxide Fuel Cell

Three-Dimensional Computational Fluid Dynamics Modelling for a Planar Solid Oxide Fuel Cell of a New Design

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