A mathematical model of a tubular solid oxide fuel cell with specified combustion zone

Jia, Junxi; Abudula, Abuliti; Wei, Liming; Ren-qiu, Jiang; Shen, Shengqiang

doi:10.1016/j.jpowsour.2007.06.057

Cited by 23 publications

(6 citation statements)

References 25 publications

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“…Here, a large amount of heat equal to about 1.55 times the power output of the fuel cell is transferred to the entering air. However, the excess air is needed to provide air‐cooling in SOFC, and excess air reduces the temperature gradient and makes the cell temperature more uniform .…”

Section: Resultsmentioning

confidence: 99%

Performance comparison of three solid oxide fuel cell power systems

Jia

Abudula

Wei³

et al. 2013

Int. J. Energy Res.

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SUMMARY An energy analysis of three typical solid oxide fuel cell (SOFC) power systems fed by methane is carried out with detailed thermodynamic model. Simple SOFC system, hybrid SOFC‐gas turbine (GT) power system, and SOFC‐GT‐steam turbine (ST) power system are compared. The influences of air ratio and operative pressure on the performance of SOFC power systems are investigated. The net system electric efficiency and cogeneration efficiency of these power systems are given by the calculation model. The results show that internal reforming SOFC power system can achieve an electrical efficiency of more than 49% and a system cogeneration efficiency including waste heat recovery of 77%. For SOFC‐GT system, the electrical efficiency and cogeneration efficiency are 61% and 80%, respectively. Although SOFC‐GT‐ST system is more complicated and has high investment costs, the electrical efficiency of it is close to that of SOFC‐GT system. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 99%

Performance comparison of three solid oxide fuel cell power systems

Jia

Abudula

Wei³

et al. 2013

Int. J. Energy Res.

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“…This improvement derives from the gas transport resistance mainly because one electrode is thicker than the other that is optimal. In general, the over potentials of ohmic have to be hindered due to its significant effect upon the potential loss of cells [117][118][119]. Specifically, the ionic conductivity that derives from ion conducting elements at reaction region must be enhanced for cell functionality improvement to generate ohmic [120].…”

Section: Sensitivity Analysis Of Micro-structures and Electrodes-electrolyte Thicknesses For An Efficient Triple Phase Boundary (Tpb)mentioning

confidence: 99%

Simulation and Sensitivity Analysis for Various Geometries and Optimization of Solid Oxide Fuel Cells: A Review

Tonekabonimoghaddam

Shamiri²

2021

Eng

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Solid oxide fuel cells (SOFCs) are considered as one of the most promising fuel cell types for application as high efficiency power generators. This work reviews the use of computational fluid dynamics (CFD) to maximise SOFC performance and life, and minimise cost, by considering numerous configurations and designs. A critical analysis of available literature proves that detailed research on the simulation of thermal stress and its damaging impact on the SOFC is still in its early stage of development. Numerical simulation is expected to help optimize the design, operating parameters and fuel cell materials. Therefore, sensitivity analysis of fuel cell parameters using simulation models is analysed to address the issue. Finally, the present status of the SOFC optimization efforts is summarized so that unresolved problems can be identified and solved.

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“…A precise emissivity of SOFC cathodes is uncertain; therefore, an emissivity value consistent with the literature is used, ε tube = 0.8 [12,13]. Sensitivity analyses have revealed radiation heat transfer to be relatively insensitive to surface emissivities because all radiation exchange occurs within relatively small enclosures.…”

Section: Cfd Model Settingsmentioning

confidence: 99%

“…Inlet conditions and system parameters applicable to a 650 W stack were supplied by the SOFC developer and are summarized in Table 2. The amount of stoichiometric air, air , for this hexadecane fueled system is calculated using the following, air = ṅ O 2 24.5 ·ṅ C 16 H 34 system inlet (13) Ambient conditions of T amb = 20 • C and P amb = 83 kPa surround the system insulation. The thermal boundary imposed to the outer insulation surface surrounding the system is convective with h = 10 W m −2 K −1 .…”

Section: Simulation Input Parametersmentioning

confidence: 99%