Performance evaluation of different bipolar plate designs of 3D planar anode-supported SOFCs

Bhattacharya, Deepra; Mukhopadhyay, Jayanta; Biswas, Nayan; Basu, Rajendra Nath; Das, Prasanta Kumar

doi:10.1016/j.ijheatmasstransfer.2018.02.096

Cited by 39 publications

(14 citation statements)

References 42 publications

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“…The details of the mathematical modeling and the governing equations of the SOFC have been discussed with details in our earlier communication. 23 Parameters used for the model are enlisted in Table 3. Boundary Conditions.…”

Section: ■ Modeling Of Sofcmentioning

confidence: 88%

“…Based on these equations, the utilization factor for the fuel and oxidant is calculated similarly to our previous study. 23 The generation and dissipation of electrochemical heat have been described by eq 6. 44 Additionally, for the porous electrodes (domains 3 and 5), subsurface flow dynamics and multicomponent diffusion in pores have also been described by eqs 2 46 and 5, 47 respectively.…”

Section: ■ Modeling Of Sofcmentioning

confidence: 99%

“…At the stack scale, the use of air is known to lead to multiple operational problems, including but not limited to high concentration overpotentials 18 and unwanted stack cooling. 19−22 Attempts have been made to mitigate these problems through the optimization of fuel and air flow rates, 23 microstructure and morphology of the cathode material, 16,24−28 and dimensions of the channel geometry. 29−31 The complexity of SOFC systems implicates that the dependence of power output on inlet gas compositions is essentially highly nonlinear and sensitive to a large number of design and process parameters.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Moreover, the volume of air required to deliver the stoichiometric amount of oxygen to the cathodic reacting interface is significantly higher, which leads to remarkable differences in cell behavior with regard to transport as well as electrochemical phenomena. At the stack scale, the use of air is known to lead to multiple operational problems, including but not limited to high concentration overpotentials and unwanted stack cooling. − Attempts have been made to mitigate these problems through the optimization of fuel and air flow rates, microstructure and morphology of the cathode material, ,− and dimensions of the channel geometry. − The complexity of SOFC systems implicates that the dependence of power output on inlet gas compositions is essentially highly nonlinear and sensitive to a large number of design and process parameters. Hence, a detailed study of SOFC operation with cathode gas compositions ranging from pure oxygen to pure air can unearth a potential opportunity for enhancement of cell performance through an optimization of the oxygen content of the cathode gasan area that is still largely unexamined.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Oxygen Diffusion Constraints on the Performance of Planar Solid Oxide Fuel Cells for Variable Oxygen Concentration

Biswas

Bhattacharya

Kumar

et al. 2020

Ind. Eng. Chem. Res.

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Performance enhancement of solid oxide fuel cell (SOFC) has been a very prominent research problem of the present era. One of the key performance-limiting factors is diffusional constraint encountered in SOFC cathodes during operation with air. While attempts at improving cell performance have been made through the optimization of geometries, flow rates, and operating conditions, very few studies have reported the potential for performance enhancement through the optimization of cathode gas composition. The present study takes an experimental as well as theoretical approach to examine the extent to which SOFC performance can be enhanced through alterations in the oxygen concentration of cathode gas (without varying the oxygen molar flow rate). An SOFC is operated for various cathodic oxygen concentrations, and the experimental protocol is simulated using a parametric computational fluid dynamics study. The results depict remarkable nonlinearities in the dependence of cell performance indicators on cathode gas oxygen concentration, which opens up a new dimension for the optimization of cell efficiency, contingent on the availability of oxygen, and the design and operational constraints unique to specific SOFC development ventures.

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Section: ■ Modeling Of Sofcmentioning

confidence: 88%

Section: ■ Modeling Of Sofcmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Oxygen Diffusion Constraints on the Performance of Planar Solid Oxide Fuel Cells for Variable Oxygen Concentration

Biswas

Bhattacharya

Kumar

et al. 2020

Ind. Eng. Chem. Res.

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“…They also stated that Reynolds number should be between 20 and 50 and between 200 and 300 for the anode and cathode side, respectively, to achieve a reasonable power density. Bhattacharya et al 16 numerically compared the performance of anode‐supported SOFCs having straight and serpentine channel geometry. They found out that the serpentine design is superior to straight design in terms of higher power and fuel utilization.…”

Section: Introductionmentioning

confidence: 99%

Development of high performance and low‐cost solid oxide fuel cell stacks: Numerical optimization of flow channel geometry

Timurkutluk

Ucar

2021

Intl J of Energy Research

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Summary Solid oxide fuel cell (SOFC) stacks with small volume and weight are essential to obtain higher specific and volumetric power densities as an alternative to conventional SOFC stacks with interconnectors having machined flow channels. This can be achieved by employing thin sheet interconnectors with flow channels formed by stamping methods rather than conventional machining of thick bulk materials. Besides the determination of process parameters providing defect free manufacturing of the desired channel design, the channel geometry is also significant for the cell performance. This study, therefore, focuses on the performance based parametric optimization of those flow channels in SOFCs by numerical simulations. In this respect, the effects of rib width, channel depth and rib angle on the cell performance are numerically investigated after the model validation with experimental results. The optimum rib width, channel depth and rib angle are determined to be 0.5 mm, 0.5 mm and 90°, respectively, within the parameter ranges considered in this study. In addition, the rib width is turned out to be the most effective parameter on the cell performance, while the cell performance almost remains unchanged for different channel depths.

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Mathematical Modeling of Reactor for Water Remediation

Bagheri¹,

Mohebbi²,

Mirzaie³

et al. 2021

Applied Water Science

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Performance evaluation of different bipolar plate designs of 3D planar anode-supported SOFCs

Cited by 39 publications

References 42 publications

Effect of Oxygen Diffusion Constraints on the Performance of Planar Solid Oxide Fuel Cells for Variable Oxygen Concentration

Effect of Oxygen Diffusion Constraints on the Performance of Planar Solid Oxide Fuel Cells for Variable Oxygen Concentration

Development of high performance and low‐cost solid oxide fuel cell stacks: Numerical optimization of flow channel geometry

Mathematical Modeling of Reactor for Water Remediation

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