Optimization of SOFC interconnect design using Multiphysic computation

Grondin, Dominique; Deseure, Jonathan; Zahid, Mohsine; García, María José Rodrigo; Bultel, Yann

doi:10.1016/s1570-7946(08)80146-0

Cited by 11 publications

(8 citation statements)

References 7 publications

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“…These data are obtained from a single circular SOEC where it is assumed that gas diffusion media allow a good uniformity of gas velocity and current collectors ensure the equipotential. These assumptions were checked by 3D modeling of the accurate geometry [22]. The geometry will thus include only electrodes, electrolyte, and gas channels.…”

Section: Geometry and Meshmentioning

confidence: 99%

Simulation of a high temperature electrolyzer

et al. 2009

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International audienceBased on Solid Oxide Fuel Cell (SOFC) technology, Solid Oxide Electrolysis Cell (SOEC) offers an interesting solution for mass hydrogen production. This study proposes a multiphysics model to predict the SOEC behavior, based on similar charge, mass, and heat transport phenomena as for SOFC. However, the mechanism of water steam reduction on Nickel/Yttria-Stabilized Zirconia (Ni/YSZ) cermet is not yet clearly identified. Therefore, a global approach is used for modeling. The simulated results demonstrated that a Butler–Volmer’s equation including concentration overpotential provides an acceptable estimation of the experimental electric performance under some operating conditions. These simulations highlighted three thermal operating modes of SOEC and showed that temperature distribution depends on gas feeding configurations

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Section: Geometry and Meshmentioning

confidence: 99%

Simulation of a high temperature electrolyzer

et al. 2009

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“…For a given SOFC geometry design, the process variables such as operating temperature and voltage, fuel and air flow rates, etc. are typical dominant variables that can be tuned to attain a thermally efficient operation at cell scale. − However, the system-wide impacts of the manipulated variables must not be compromised. For instance, while higher air flow rate leads to a lower temperature gradient, it can controversially increase the operation cost due to higher blower power and sizing issues.…”

Section: Introductionmentioning

confidence: 99%

System Level Exergy Assessment of Strategies Deployed for Solid Oxide Fuel Cell Stack Temperature Regulation and Thermal Gradient Reduction

Tang

Amiri

Tadé

2019

Ind. Eng. Chem. Res.

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Several operational strategies for Solid Oxide Fuel Cell (SOFC) temperature regulation and temperature gradient minimization at cell scale have previously been assessed by the authors (Amiri et al., Ind. Eng. Chem. Res., 2016). The application of such strategies at system scale, however, requires a numerical linkage between the cell and system performance metrics allowing simultaneous evaluation of the dominant process interactions. The objective of this study is to analytically examine the effectiveness and applicability of the mentioned thermal management methods at system scale. To achieve this, a system level exergy analysis is presented by using a modelling platform in which a detailed 4-cell short stack module and the Balance-of-Plant (BoP) are integrated. Linkage between the system performance metrics and the stack internal temperature gradient is specifically emphasized. For this, the exergy intensive points (unit operations) are identified throughout the plant. Subsequently, the effective strategies that had been employed for the cell level thermal management proposed in our previous work (Amiri et al., Ind. Eng. Chem. Res., 2016) are examined at the system level capturing the effects on the state of BoP exergy intensive components. Moreover, fuel design is proposed and evaluated as a potential thermal management strategy. Combination of variety of measures including the exergy destruction rates, the electrical and thermal efficiencies, and the stack internal temperature gradient provides a comprehensive set of data contributing to the SOFC system thermal management.

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“…However, the thermal stress depends on the temperature distribution and the load conditions of a complete single cell would be affected by the interconnect structure. With contact area increasing, power density and temperature gradient would be reduced when a decreasing size of collecting pins tended to gain a better temperature homogeneity and power density [ 31 ]. Beside the contact area and the size of collecting pins, addition of interconnect ribs is another option for modifying interconnect structure.…”

Section: Introductionmentioning

confidence: 99%

Solid oxide fuel cell interconnect design optimization considering the thermal stresses

Yang

et al. 2016

Science Bulletin

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The mechanical failure of solid oxide fuel cell (SOFC) components may cause cracks with consequences such as gas leakage, structure instability and reduction of cell lifetime. A comprehensive 3D model of the thermal stresses of an anode-supported planar SOFC is presented in this work. The main objective of this paper is to get an interconnect optimized design by evaluating the thermal stresses of an anode-supported SOFC for different designs, which would be a new criterion for interconnect design. The model incorporates the momentum, mass, heat, ion and electron transport, as well as steady-state mechanics. Heat from methane steam reforming and water–gas shift reaction were considered in our model. The results examine the relationship between the interconnect structures and thermal stresses in SOFC at certain mechanical properties. A wider interconnect of the anode side lowers the stress obviously. The simulation results also indicate that thermal stress of coflow design is smaller than that of counterflow, corresponding to the temperature distribution. This study shows that it is possible to design interconnects for an optimum thermal stress performance of the cell.

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Optimization of SOFC interconnect design using Multiphysic computation

Cited by 11 publications

References 7 publications

Simulation of a high temperature electrolyzer

Simulation of a high temperature electrolyzer

System Level Exergy Assessment of Strategies Deployed for Solid Oxide Fuel Cell Stack Temperature Regulation and Thermal Gradient Reduction

Solid oxide fuel cell interconnect design optimization considering the thermal stresses

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