Large Scale Simulation of SOFC Stack

Components of solid oxide fuel cells (SOFCs) are exposed to high temperatures and gas pressures under operation. Subjected to the starting and stopping operations, the performance of SOFCs is gradually degraded. One of the degradation factors can be thermal expansive deformation due to temperature change, while the expansive deformation under a reducing environment is a characteristic of SOFCs. These deformations inevitably invoke an unexpectedly large stress owing to the mutual constraints of the components, which causes mechanical deterioration. In addition, creep plays a primary role in long-term operation at high temperatures. Our research group is investigating deformation of SOFC by combining mechanical and electrochemical phenomena. The target covers cells from laboratory-level to practical large scale.

Keywords

Electrochemistry, Solid Oxide Fuel Cell, Inelasticity, Large Scale Computation

References

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Muramatsu, M., Yashiro, K., Kawada, T. and Terada, K., “Numerical simulations of non-stationary distributions of electrochemical potentials in SOFC”, Engineering Computations, Vol. 34, No. 6, pp. 1956-1988, (2017).

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Muramatsu, M., Terada, K., Kawada, T., Yashiro, K., Takahashi, K. and Takase, S., “Characterization of Time-varying Macroscopic Electro-chemo-mechanical Behavior of SOFC Subjected to Ni-sintering in Cermet Microstructures”, Computational Mechanics, Vol. 56, No. 4, pp. 653-676, (2015).

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Muramatsu, M., Sato, M., Terada, K., Watanabe, S., Yashiro, K., Kawada, T., Iguchi, F. and Yokokawa, H., “Shape Deformation Analysis of Anode-supported Solid Oxide Fuel Cell by Electro-chemo-mechanical Simulation”, Solid State Ionics, Vol. 319, pp. 194-202, (2018).

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Yokokawa, H., Kishimoto, H., Yamaji, K., Muramatsu, M., Terada, K., Yashiro, K. and Kawada, T., “Simulation Technology on SOFC Durability with an Emphasis on Conductivity Degradation of ZrO2-base Electrolyte”, Journal of Electrochemical Energy Conversion and Storage, Vol. 14, No. 1, 011004 (19 pages), (2017).

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