Global sensitivity analysis of uncertain parameters based on 2D modeling of solid oxide fuel cell

Wu, Cheng‐Ru; Ni, Meng; Du, Qing; Jiao, Kui

doi:10.1002/er.4869

Cited by 5 publications

(6 citation statements)

References 46 publications

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“…This small linear increase in average voltage and power density with a rise in temperature may be attributed to a net decrease in polarization losses at higher temperatures. Wu et al. (2019) developed a quasi–2-D non-isothermal microstructural based model of a SOFC for its parametric simulation and optimization.…”

Section: Results and Interpretationmentioning

confidence: 99%

“…In the study, the exchange current density equation applicable for humidified hydrogen fuels has been modified for application to SOFCs fueled by hydrocarbons. Wu et al. (2019) conducted a parametric sensitivity analysis of important microstructural parameters of the composite anode/cathode function layers for a planar SOFC fuelled with humidified H 2 feed.…”

Section: Introductionmentioning

confidence: 99%

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Parametric sensitivity analysis for a natural gas fueled high temperature tubular solid oxide fuel cell

Kalra¹,

Rishabh²,

Kumar³

2020

Heliyon

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For more than the last two decades, there has been research going on to develop advanced energy technologies involving minimum environmental pollution, to replace the conventional fossil energy systems. Solid oxide fuel cells (SOFCs) are one of the most promising, eco-friendly and efficient means for the generation of electricity to meet the future energy requirements. This research work focuses on the parametric sensitivity analysis for natural gas fueled high temperature tubular SOFC. Firstly, for the tubular SOFC, a one-dimensional radially symmetrical model has been developed and solved using the finite-difference method. Then, the effect of the variation of important operational and design parameters on its performance has been analyzed. The parameters typically include composition, inlet fuel temperature, pressure, length of SOFC tube and thicknesses of its components. The composition is expressed as steam to methane ratio and it has been observed that the voltage and power density developed by the SOFC diminishes as the ratio increases. Further, a change in the inlet fuel pressure of the tubular SOFC has no pronounced influence on the voltage and power density developed. On the other hand, with an increase in the inlet fuel temperature, a small improvement in these performance characteristics is exhibited. The axial length of the tubular SOFC does conspicuously influence its performance characteristics but solely at current densities greater than 4000A/m 2 . An increase in the thickness of its components results in a reduction in its voltage and power density developed. The largest decline in these performance characteristics with the increase in thickness is observed for electrolyte followed by cathode and anode respectively.

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Section: Results and Interpretationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Parametric sensitivity analysis for a natural gas fueled high temperature tubular solid oxide fuel cell

Kalra¹,

Rishabh²,

Kumar³

2020

Heliyon

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“…12,13 Apart from electrochemical reaction sites, other micro-characteristics such as average pore/particle size, porosity and tortuosity also play important roles in the species and charge transport process. 14,15 Simulation of the microstructure evolution during the sintering process is the basis for parametric analysis.…”

Section: Introductionmentioning

confidence: 99%

Sintering kinetics and microstructure analysis of composite mixed ionic and electronic conducting electrodes

Wang

et al. 2022

Intl J of Energy Research

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Summary Mixed ionic‐electronic conducting (MIEC) cathode materials are promising for application in intermediate‐temperature solid oxide fuel cell due to their potentially low polarization resistance for oxygen reduction reaction. Sintering is a key step in fabricating MIEC composite cathode to form interconnected networks for gas transport and electron/ion conduction. However, the sintering process of MIEC composite electrodes has rarely been studied and thus not well understood. In this study, an enhanced kinetic Monte Carlo (KMC) model is proposed to study the microstructure evolution of the composite MIEC electrodes. The key microstructural properties such as average particle size, pore size, porosity, tortuosity, effective surface area and effective three‐phase boundary (TPB) length are comprehensively extracted from the reconstructed electrode by a series of the estimation algorithm. A backpropagation artificial neural network (ANN) is established for the quick prediction of micro properties during the sintering process. Besides, a global sensitivity analysis approach based on the elementary effects method is applied to assess the sensitivity degree of structural and operating parameters while Kolmogorov‐Smirnov test is conducted to ensure the reliability of the sampling strategy (P‐value >> .05). By considering the time evolution within the ANN surrogate model, this study firstly explores the coupling parametric effects of the KMC model at different sintering stages. The initial sintering stage (KMC steps <1000) is found to be the dominant section throughout the sintering procedure due to higher initial system free energy. Tortuosity and porosity show the most significant influence on the formation of effective surface and TPB reaction sites. Large tortuosity and small porosity favor the formation of effective surface reaction area but adversely hinder the gas transport at the same time. Free energy and sintering temperature are the determining factors in the sintering process. Even though grain growth and pore migration frequency show almost the same importance, their influence on the different output factors is quite different. This study establishes a qualitative framework to gain an essential perception about how the sintering process influences the micro properties of the electrode thereby efficiently guiding the sintering control and microstructure design. Highlights A kinetic Monte Carlo model is established considering sintering kinetics. A BP‐ANN method is proposed for quick prediction of micro‐characteristics An elementary effects approach is employed to perform global sensitivity analysis. Decisive role of initial powder fabrication on the sintering process is emphasized Porosity and tortuosity play the most significant effects than other structural factors.

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“…To improve energy utilization and reduce pollutants as well as greenhouse gases, developing efficient energy conversion technologies is one of the urgent problems to be solved. With many advantages of high efficiency, low pollutant emissions, simplicity, and silent functioning, fuel cells have become a competitive power generation technology 1 . Among different kinds of fuel cells, solid oxide fuel cell (SOFC) can be the most promising technology for the hybrid power generation since its high fuel flexibility and efficiency 2 .…”

Section: Introductionmentioning

confidence: 99%

“…With many advantages of high efficiency, low pollutant emissions, simplicity, and silent functioning, fuel cells have become a competitive power generation technology. 1 Among different kinds of fuel cells, solid oxide fuel cell (SOFC) can be the most promising technology for the hybrid power generation since its high fuel flexibility and efficiency. 2 Besides, the high operating temperature (about 773.15-1273.15 K) 3 allows SOFC to integrate with other thermodynamic cycles to achieve further waste heat utilization.…”

Section: Introductionmentioning

confidence: 99%

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle

et al. 2020

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Summary The paper proposes a novel combined heating and power (CHP) system integrated with solid oxide fuel cell (SOFC) and supercritical CO2 (SCO2) partial preheating cycle to improve the energy utilization rate by employing the SCO2 cycle to recover the waste heat from the SOFC. The SCO2 partial preheating cycle can not only improve the net output power but also preheat the air supplied to the SOFC for enhancing the system efficiency. Sensitivity analysis is implemented to study the influences of six key parameters (ie, fuel flow rate, excess air ratio, fuel utilization factor, CO2 turbine inlet temperature, CO2 compressor pressure ratio, and CO2 split ratio) on the proposed system in terms of thermodynamic behaviors. And then the optimal operating conditions for the different objectives are determined by parametric optimization. The results indicate that the optimal overall electrical efficiency and CHP efficiency of the proposed system are 72.84% and 83.83% respectively, while the exergy efficiency can achieve 70.84%. Furthermore, the best trade‐off result is obtained with the energy output of 434.71 kW and the exergy efficiency of 64.28%. Finally, the investigation demonstrates the fuel flow rate is the most sensitive parameter which should be determined with the comprehensive consideration of the efficiency and energy output, and the lower excess air ratio and higher CO2 turbine inlet temperature are preferred for power generation.

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Global sensitivity analysis of uncertain parameters based on 2D modeling of solid oxide fuel cell

Cited by 5 publications

References 46 publications

Parametric sensitivity analysis for a natural gas fueled high temperature tubular solid oxide fuel cell

Parametric sensitivity analysis for a natural gas fueled high temperature tubular solid oxide fuel cell

Sintering kinetics and microstructure analysis of composite mixed ionic and electronic conducting electrodes

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle

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Global sensitivity analysis of uncertain parameters based on 2D modeling of solid oxide fuel cell

Cited by 5 publications

References 46 publications

Parametric sensitivity analysis for a natural gas fueled high temperature tubular solid oxide fuel cell

Parametric sensitivity analysis for a natural gas fueled high temperature tubular solid oxide fuel cell

Sintering kinetics and microstructure analysis of composite mixed ionic and electronic conducting electrodes

Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO2partial preheating cycle

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Product

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Conceptual design and performance analysis of a novelCHPsystem integrated with solid oxide fuel cell and supercriticalCO₂partial preheating cycle