Three-dimensional CFD modeling of transport phenomena in multi-channel anode-supported planar SOFCs

Zhang, Zhonggang; Yue, Danting; Yang, Guogang; Chen, Jingfeng; Zheng, Yifeng; Miao, He; Wang, Weiguo; Yuan, Jinliang; Huang, Naibao

doi:10.1016/j.ijheatmasstransfer.2015.01.097

Cited by 81 publications

(21 citation statements)

References 22 publications

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“…Among various SOFC designs, planar and tubular are the most maturely developed types [5,6]. For the tubular configuration, the Micro-tubular SOFC (MT-SOFC) possesses great advantages over conventional tubular SOFC (T-SOFC) and planar SOFC (P-SOFC), such as higher power density, higher mass transfer efficiency, stronger mechanical property and lower thermal stress [7,8].…”

Section: Introductionmentioning

confidence: 99%

Residual stress analysis of a micro-tubular solid oxide fuel cell

Kong

Zhang

et al. 2016

International Journal of Hydrogen Energy

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Available online xxxKeywords: Micro-tubular solid oxide fuel cell (MT-SOFC) Residual stress Electrode thickness Failure probability a b s t r a c t A two-dimensional axisymmetric micro-tubular solid oxide fuel cell (MT-SOFC) model is developed to study the influence of component (anode, cathode or electrolyte) thickness onresidual stress at the room temperature. The results show that the anode is mainly subjected to tension stress while electrolyte and cathode are mostly exposed to compressive stress. However, the stress in a component can be reduced by increasing its thickness with other components unchanged. Then the Weibull analysis method is adopted to calculate the failure probability of the anode, it is found that the anode is prone to failure with a thinner anode or thicker cathode and electrolyte; the electrolyte thickness has a more significant effect on the anode failure probability than the cathode; and the component thickness must be coordinated in order to maximize the mechanical performance. The formula of the minimum anode thickness under the failure probability criterion 1E-6 is given, which brings considerable convenience to the design of MT-SOFC.

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Section: Introductionmentioning

confidence: 99%

Residual stress analysis of a micro-tubular solid oxide fuel cell

Kong

Zhang

et al. 2016

International Journal of Hydrogen Energy

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“…The effects of ion and electron transport resistance in the electrode as well as operating temperature and excessive airflow on the cell performance were studied. Zhang et al (2015) established an anode-supported threedimensional SOFC single channel model based on computational fluid dynamics (CFD), and compared the calculated results with the experimental results, which were well verified. The distribution of temperature, reactant velocity, current density and reactant concentration in different flow modes is explained in detail by comparing three different flow modes (co-, counter-and cross-flow).…”

Section: Introductionmentioning

confidence: 74%

Multiphysics Coupling Simulation and Parameter Study of Planar Solid Oxide Fuel Cell

Dong

Shen

et al. 2021

Front. Chem.

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In this paper, a numerical model of gas flow, heat transfer, mass transfer and electrochemical reaction multi-physics field coupling of a planar SOFC is established and solved. According to the calculation results, the distribution of velocity, temperature and concentration inside the SOFC cell is analyzed. The influence of cathode inlet flow rate, porosity, rib width and other parameters on the performance of SOFC is also discussed. The results show that within a certain range, increasing the cathode inlet flow rate can significantly increase the average current density of the cell. Increasing the porosity of the electrode can improve the gas diffusion of the porous electrode, thereby increasing the rate of the electrochemical reaction. Increasing the width of the ribs will result in a significant decrease in cell performance. Therefore, the rib width should be reduced as much as possible within the allowable range to optimize the working performance of the cell.

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“…They pointed out that the geometric configuration of the air supply has large effect on SOFC performance, as the O 2 concentration under the interconnect area is low, which causes a low current density under this area. Zhang et al simulated multichannel anode‐supported planar SOFCs and compared the effects of co‐, counter‐, and cross‐flow effect on current density distribution and temperature distribution with Fluent add‐on module.…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional nonisothermal modeling of solid oxide fuel cell coupling electrochemical kinetics and species transport

Yan

Zhou

et al. 2019

Int J Energy Res

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Summary A three‐dimensional (3D) nonisothermal model is developed and applied for anode‐supported planar solid oxide fuel cell (SOFC). The mass and momentum, species, ion, electric, and heat transport equations are solved simultaneously by implementing the electrochemical kinetics and electrochemical reaction as volumetric source terms. The interconnect land limits the O2 transport under the land and lowers the local current density under the land. The effects of interconnect land width and cathode substrate thickness on SOFC cell performance are quantified in this study. Cathode stoichiometry is found to have a large effect on the SOFC cell temperature distribution. Under low‐cathode stoichiometry, significant temperature gradients are seen in the SOFC cell. Higher‐cathode stoichiometry is beneficial for lower temperature and more uniform current density distribution in SOFC cell. Co‐flow and counter‐flow arrangements are investigated and discussed with the model. Counter‐flow arrangement is found to induce a high temperature and high current density region near the H2 inlet. On the other hand, co‐flow arrangement leads high temperature and high current density to occur relatively downstream, a slightly lower maximum temperature on cell and considerably more uniform current density distribution. A 67.2‐cm2 SOFC cell is simulated considering the side cooling effect. The side cooling effectively lowers the cell temperature, at the same time, causes temperature, current density, and fuel utilization nonuniformity in the across multichannel direction. Because of the strong coupling of the in‐plane current density distribution and temperature distribution, limiting the locally high temperature and temperature gradient is critical for achieving a more uniform current density distribution in anode‐supported planar SOFC.

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Three-dimensional CFD modeling of transport phenomena in multi-channel anode-supported planar SOFCs

Cited by 81 publications

References 22 publications

Residual stress analysis of a micro-tubular solid oxide fuel cell

Residual stress analysis of a micro-tubular solid oxide fuel cell

Multiphysics Coupling Simulation and Parameter Study of Planar Solid Oxide Fuel Cell

Three‐dimensional nonisothermal modeling of solid oxide fuel cell coupling electrochemical kinetics and species transport

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