Mathematical modeling of solid oxide fuel cells: A review

Hajimolana, S.A.; Hussain, Mohd Azlan; Daud, Wan Mohd Ashri Wan; Soroush, Masoud; Shamiri, Ahmad

doi:10.1016/j.rser.2010.12.011

Cited by 260 publications

(102 citation statements)

References 173 publications

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“…The electronic conductivities in the anode and the cathode as well as the ionic conductivity in the electrolyte material are calculated as [19][20]:…”

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confidence: 99%

“…This is accounted for by using the structure dependent tortuosity factors and volume fractions. The effective ionic and electronic conductivity in the electrodes are defined as [21]: (20) where  is the tortuosity factors of charge transport and V the volume fraction for the specific materials, as specified in Table 2 46 were found for Ni and between 9.84 and 27.89 for YSZ, respectively, depending slightly on the evaluation methods, but mostly on the direction (x, y and z) [22]. Vivet et al [23] calculated the tortuosity in the range of 3.04 and 6.24 for Ni, and between 1.79 and 2.10 for YSZ, respectively.…”

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confidence: 99%

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SOFC modeling considering hydrogen and carbon monoxide as electrochemical reactants

Andersson

Yuan

Sundén

2013

Journal of Power Sources

130

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Fuel cells are promising for future energy systems, because they are energy efficient and able to use renewable fuels. A fully coupled computational fluid dynamics (CFD) approach based on the finite element method, in twodimensions, is developed to describe a solid oxide fuel cell (SOFC). Governing equations for, gas-phase species, heat momentum, ion and electron transport are implemented and coupled to kinetics describing electrochemical and internal reforming reactions. Both carbon monoxide and hydrogen are considered as electrochemical reactants within the anode. The predicted results show that the current density distribution along the main flow direction depends on the local concentrations and temperature. A higher (local) fraction of electrochemical reactants increases the Nernst potential as well as the current density. For fuel mixtures without methane, the cathode air flow rate needs to be increased significantly to avoid high temperature gradients within the cell as well as a high outlet temperature.

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“…The electronic conductivities in the anode and the cathode as well as the ionic conductivity in the electrolyte material are calculated as [19][20]:…”

mentioning

confidence: 99%

mentioning

confidence: 99%

SOFC modeling considering hydrogen and carbon monoxide as electrochemical reactants

Andersson

Yuan

Sundén

2013

Journal of Power Sources

130

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“…This process commonly occurs between 750°C and 900°C and is thus compatible with solid oxide fuel cells [35]. These operate at high enough temperature to allow for the endothermic steam reforming reactions, giving rise to an internal reforming solid oxide fuel cell.…”

Section: Effect Of Inlet Temperaturementioning

confidence: 99%

Effect of Design Parameters on the Internal Steam Reforming of Methane in Solid Oxide Fuel Cell Systems

Chen¹

2017

AJME

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Abstract:The operation of solid oxide fuel cell systems with the internal steam reforming of methane over supported nickel catalysts is studied. A mathematical model including heterogeneous chemistry, electro-chemistry, mass transport, and porous media transport is developed to explore the thermal energy coupling between the steam reforming and the electrochemical reactions, independent of the geometrical structure. The role of catalyst activity, inlet temperature, current density, and operating pressure in the system behavior is evaluated. A sensitivity analysis is also performed for different design parameters. The effect of flow configuration on the operation of the system is analyzed and compared based on multiple performance criteria. It is shown that the internal steam reforming within the fuel cell system can result in an overall auto-thermal operation which increases efficiency and simplifies the design process. However, a local cooling effect may occur close to the entrance of the reformer. The use of less active catalysts can cause the slippage of the methane. To reduce both the overall temperature increase across the fuel cell and the local cooling caused by the endothermic steam reforming reactions, increasing the operating pressure is found to be an effective approach. High system efficiency is obtained with increasing the operating pressure or decreasing the current density. The more efficient system is found for a co-flow configuration, while significant temperature gradients near the entrance of the reformer are not desirable for ceramic solid oxide fuel cell systems.

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“…The type of telephone service that is tested for the following three pre-determined scenarios to determine which approach to introduce is more favorable for the country's energy consumption and economy: (1) cell phone only; (2) landline phone only; (3) cell phone and landline phone two ways to mix. In Figure 5, the horizontal axis represents the number of people using the mobile phone, the vertical axis represents the energy consumed, the cellphone curve shows the case of using the mobile phone, and the landline curve shows the case of using the fixed phone.…”

Section: (2)mentioning

confidence: 99%

Design and Analysis Based on US Telephone Service Selection Model

Chen¹,

Ma²

2018

Advances in Intelligent Systems Research

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Abstract-In today's society, with the development of cell phones, it has brought more and more convenience to us. More and more people use cell phones and landline phones to assume the trend of being replaced. While using cell phones, energy consumption has risen dramatically. In order to save energy so as to achieve social sustainability, developing countries that facilitate less-than-optimal telephone service can analyze the energy consumption of landline phones and cell phones to help solve their energy consumption problems and choose different telephone services. This article will use MATLAB as a supporting tool to design and analyze telephone services in the U.S.

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Mathematical modeling of solid oxide fuel cells: A review

Cited by 260 publications

References 173 publications

SOFC modeling considering hydrogen and carbon monoxide as electrochemical reactants

SOFC modeling considering hydrogen and carbon monoxide as electrochemical reactants

Effect of Design Parameters on the Internal Steam Reforming of Methane in Solid Oxide Fuel Cell Systems

Design and Analysis Based on US Telephone Service Selection Model

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