Modeling and control-oriented thermal safety analysis for mode switching process of reversible solid oxide cell system

Liu, Guoqiang; Zhao, Wei; Li, Zexin; Xia, Zeyang; Kupecki, Jakub; Pang, Shui; Deng, Zongquan; Li, Xi

doi:10.1016/j.enconman.2022.115318

Cited by 22 publications

(8 citation statements)

References 36 publications

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“…In addition, according to recent research, the energy conversion efficiency (ECE) of SOEC can reach greater than 90% 22 . Consequently, it has been extensively studied as an option to effectively manage the use and storage of intermittent renewable energy and reuse of discharged carbon resources 23,24 …”

Section: Introductionmentioning

confidence: 99%

“…22 Consequently, it has been extensively studied as an option to effectively manage the use and storage of intermittent renewable energy and reuse of discharged carbon resources. 23,24 Recently, many investigations have reported progress on using SOEC to electrolyze CO 2 to make fuel. [25][26][27][28] Compared with other types of electrolytic cells for CO 2 reduction, the reaction in SOEC is simpler (CO 2 → CO + 1/2O 2 ), the conversion can exceed 50%, and the selectivity for conversion into CO can reach almost 100%.…”

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confidence: 99%

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Pulsed electrolysis of carbon dioxide by large‐scale solid oxide electrolytic cells for intermittent renewable energy storage

Han

et al. 2022

Carbon Energy

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CO2 electrolysis with solid oxide electrolytic cells (SOECs) using intermittently available renewable energy has potential applications for carbon neutrality and energy storage. In this study, a pulsed current strategy is used to replicate intermittent energy availability, and the stability and conversion rate of the cyclic operation by a large‐scale flat‐tube SOEC are studied. One hundred cycles under pulsed current ranging from −100 to −300 mA/cm2 with a total operating time of about 800 h were carried out. The results show that after 100 cycles, the cell voltage attenuates by 0.041%/cycle in the high current stage of −300 mA/cm2, indicating that the lifetime of the cell can reach up to about 500 cycles. The total CO2 conversion rate reached 52%, which is close to the theoretical value of 54.3% at −300 mA/cm2, and the calculated efficiency approached 98.2%, assuming heat recycling. This study illustrates the significant advantages of SOEC in efficient electrochemical energy conversion, carbon emission mitigation, and seasonal energy storage.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Pulsed electrolysis of carbon dioxide by large‐scale solid oxide electrolytic cells for intermittent renewable energy storage

Han

et al. 2022

Carbon Energy

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“…The model was scaled to a greater number of cells to satisfy the requirements of the electrical network. Liu et al [10] studied strategies for the thermal safety analysis for the mode-switching process of a reversible solid oxide cell system. The authors used a simplified computational model of the rSOC system and a finite element method 1D model of the stack to determine the temperature distribution of the cell along the direction of the gas flow during the process.…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modeling and Thermal Control of a 1.5 kW Reversible Solid Oxide Stack for 24/7 Hydrogen Plants

et al. 2023

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Solid oxide technology has gained importance due to its higher efficiencies compared to other current hydrogen technologies. The reversible mode allows working with both technologies (SOEC-SOFC), which makes it very attractive for mixed operations, both storage and generation, increasing its usage and therefore the viability of the technology implementation. To improve the performance of reversible stacks, developing adequate control strategies is of great importance. In order to design these strategies, suitable models are needed. These control-oriented models should be simple for an efficient controller design, but also they should include all phenomena that can be affected by the control law. This article introduces a control-oriented modeling of a reversible solid oxide stack (rSOS) for the implementation of control strategies considering thermal and degradation effects. The model is validated with experimental data of a 1.5 kW laboratory prototype, analyzing both polarization curves and dynamic responses to different current profiles and compositions. An error of less than 3% between the model and experimental responses has been obtained, demonstrating the validity of the proposed control-oriented model. The proposed model allows performing new and deeper analysis of the role of reversible solid oxide cells in 24/7 generation plants with renewable energy sources.

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“…Simultaneously, electrolytes should have low electronic conductivity to prevent the flow of electrons, thereby preserving the ionic conductivity of the electrolyte. Moreover, high structural stability is crucial for the long‐term stable operation of the cell, [24] ensuring that the electrolyte remains undamaged during cell operation. Electrolytes must also exhibit outstanding chemical stability to resist reactions with other cell components, ensuring the longevity and performance of the cell.…”

Section: Research Progress Of Rsoc Electrode Materialsmentioning

confidence: 99%

Recent Development in Reversible Solid Oxide Fuel Cells: Theory, Integration and Prospective

Yang,

Lei,

Huang

et al. 2023

ChemElectroChem

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Reversible solid oxide fuel cell (RSOC) has gained widespread attention due to their potential for high efficiency in implementing multi‐energy distributed systems. When high power demand is required, RSOC can operate in the solid oxide fuel cell (SOFC) mode, directly converting the chemical energy from hydrogen or other renewable fuels into electricity. When excess electricity is available, RSOC can operate in the solid oxide electrolysis cell (SOEC) mode, producing fuels through the electrolysis of water or co‐electrolysis of water and carbon dioxide. The reversible operation of RSOC enables the direct conversion between chemical energy and electricity, offering a promising solution for clean and sustainable energy with low cost and high round‐trip efficiency. This paper introduces the research background and working principles of RSOC, provides a detailed overview of the current research status of electrolyte, fuel electrode, and oxygen electrode materials, discusses the optimization design of RSOC stacks and energy utilization strategies in the system. In addition, the future development directions of RSOC were also explored, which is of significant importance for the commercialization of RSOC.

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Modeling and control-oriented thermal safety analysis for mode switching process of reversible solid oxide cell system

Cited by 22 publications

References 36 publications

Pulsed electrolysis of carbon dioxide by large‐scale solid oxide electrolytic cells for intermittent renewable energy storage

Pulsed electrolysis of carbon dioxide by large‐scale solid oxide electrolytic cells for intermittent renewable energy storage

Mathematical Modeling and Thermal Control of a 1.5 kW Reversible Solid Oxide Stack for 24/7 Hydrogen Plants

Recent Development in Reversible Solid Oxide Fuel Cells: Theory, Integration and Prospective

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