Momentum-species-heat-electrochemistry distribution characteristics within solid oxide fuel cell stack with complex inter-digital fuel channels

Ding, Kai; Zhu, Man; Han, Zhen Ji; Kochetov, Vladimir; Liu, Lu; Chen, Daifen

doi:10.1007/s11581-020-03602-9

Cited by 14 publications

(6 citation statements)

References 38 publications

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“…Solid oxide fuel cell (SOFC) is regarded as one of the most promising new energy technologies 1 due to its high fuel flexibility, 2,3 low environmental pollution, 4 small volume, 5 no Carnot cycle restriction for power generation efficiency, 6 and can be combined with a gas turbine for power generation 7 . Its performance has been comprehensively studied, 8‐12 and it has been applied on a certain scale 13 .…”

Section: Introductionmentioning

confidence: 99%

Effect of flow modes on operation characteristics of three‐dimensional non‐isothermal solid oxide fuel cell stack

Fan

Ye²,

Qiu-feng³

et al. 2021

Intl J of Energy Research

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The three-dimensional non-isothermal model of anode-supported planar solid oxide fuel cell was established. In order to reduce the temperature rise of SOFC in the process of operation and improve the output performance of the stack, this paper studied and compared the operation of SOFC in four different flow modes. The study found that the flow mode has a great influence on the temperature distribution of the SOFC stack. In co-flow, the temperature increases continuously along the channel length. In the case that oxygen and hydrogen of each cell are in co-flow, by reversing the flow direction between adjacent cells, the temperature rise of the SOFC stack along the channel direction can be reduced by 26 K, which decreases from 41.2 K to about 15 K. At the same time, the output current density and power density of the SOFC stack are also improved to some extent.

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Section: Introductionmentioning

confidence: 99%

Effect of flow modes on operation characteristics of three‐dimensional non‐isothermal solid oxide fuel cell stack

Fan

Ye²,

Qiu-feng³

et al. 2021

Intl J of Energy Research

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“…Thermal stress during the cell stack operation is mainly caused by the gradient temperature ( G ) from the fuel gas outlet (low temperature) to the inlet (high temperature) [ 138 ]. G can reach around 200 K in a plane-type ceramic-supported cell stack [ 139 , 140 ], primarily due to the low thermal conductivity of the ceramics.…”

Section: The Degradation Of Cell Stacksmentioning

confidence: 99%

Degradation Mechanisms of Metal-Supported Solid Oxide Cells and Countermeasures: A Review

et al. 2021

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Metal-supported oxide cells (MSCs) are considered as the third-generation solid oxide cells (SOCs) succeeding electrolyte-supported (first generation) and anode-supported (second generation) cells, which have gained much attention and progress in the past decade. The use of metal supports and advanced technical methods (such as infiltrated electrodes) has vastly improved cell performance, especially with its rapid startup ability and power density, showing a significant decrease in raw materials cost. However, new degradation mechanisms appeared, limiting the further improvement of the performance and lifetime. This review encapsulates the degradation mechanisms and countermeasures in the field of MSCs, reviewing the challenges and recommendations for future development.

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“…It has been found that the YSZ electrolyte for the SOFCs as compared to the PCFCs. The ceramic fuel cell is th samarium-doped ceria as the electrolyte; its operating temperature ran °C; however, its ionic conductivity is inadequate [24]. Mixing of bariu ium zirconates to form perovskite-type electrolytes with rare-earth-d good stability and proton conductivity at the temperatures of 400-7 third-generation PCFC was developed with ultrathin multilayer electro earth metals (Eu, La, Ru, Pr, or Ir) [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…It has been found that the YSZ electrolyte was more suitable for the SOFCs as compared to the PCFCs. The ceramic fuel cell is then fabricated using samarium-doped ceria as the electrolyte; its operating temperature ranges from 600 to 700 • C; however, its ionic conductivity is inadequate [24]. Mixing of barium cerates and barium zirconates to form perovskite-type electrolytes with rare-earth-doped B-sites shows good stability and proton conductivity at the temperatures of 400-700 • C [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics for Protonic Ceramic Fuel Cell Stack Modeling: A Brief Review

et al. 2022

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Protonic ceramic fuel cells (PCFCs) are one of the promising and emerging technologies for future energy generation. PCFCs are operated at intermediate temperatures (450–750 °C) and exhibit many advantages over traditional high-temperature oxygen-ion conducting solid oxide fuel cells (O-SOFCs) because they are simplified, have a longer life, and have faster startup times. A clear understanding/analysis of their specific working parameters/processes is required to enhance the performance of PCFCs further. Many physical processes, such as heat transfer, species transport, fluid flow, and electrochemical reactions, are involved in the operation of the PCFCs. These parameters are linked with each other along with internal velocity, temperature, and electric field. In real life, a complex non-linear relationship between these process parameters and their respective output cannot be validated only using an experimental setup. Hence, the computational fluid dynamics (CFD) method is an easier and more effective mathematical-based approach, which can easily change various geometric/process parameters of PCFCs and analyze their influence on its efficiency. This short review details the recent studies related to the application of CFD modeling in the PCFC system done by researchers to improve the electrochemical characteristics of the PCFC system. One of the crucial observations from this review is that the application of CFD modeling in PCFC design optimization is still much less than the traditional O-SOFC.

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Momentum-species-heat-electrochemistry distribution characteristics within solid oxide fuel cell stack with complex inter-digital fuel channels

Cited by 14 publications

References 38 publications

Effect of flow modes on operation characteristics of three‐dimensional non‐isothermal solid oxide fuel cell stack

Effect of flow modes on operation characteristics of three‐dimensional non‐isothermal solid oxide fuel cell stack

Degradation Mechanisms of Metal-Supported Solid Oxide Cells and Countermeasures: A Review

Computational Fluid Dynamics for Protonic Ceramic Fuel Cell Stack Modeling: A Brief Review

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