Parametric and transient analysis of non-isothermal, planar solid oxide fuel cells

Tseronis, K.; Bonis, Ioannis; Kookos, Ioannis K.; Theodoropoulos, Constantinos

doi:10.1016/j.ijhydene.2011.09.062

Cited by 68 publications

(47 citation statements)

References 45 publications

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“…The charge transport in a non-porous media i, is described by the Poisson equation as follows [1,33]:…”

Section: The Macroscopic Modelmentioning

confidence: 99%

“…The gaseous phase species' Faradaic rates and the BSS Faradaic generation rate due to the electrochemical reactions (7) to (10) occuring at the TPBs of the cathode and the anode are described by the following expressions:R (33) where W is the width of both anode and cathode electrodes, L a/c is the length of anode and cathode electrodes respectively, F is the Faraday constant, I i A/C denotes the current density distribution of the Anode/Cathode computed by Eq. (43) and Eq.…”

Section: The Macroscopic Modelmentioning

confidence: 99%

“…The macro-and microscopic models interact at the anodic triple phase boundaries via the BSS Faradaic generation (Eq. (33)) and also through the gaseous species partial pressures updates (Eq. (45) to (48)).…”

Section: Numerical Solution Approachmentioning

confidence: 99%

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Multi-scale Modelling of Electrochemically Promoted Systems

Fragkopoulos

Theodoropoulos

2014

Electrochimica Acta

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Keywords:NEMCA backspillover multi-scale modelling CFD-kMC coupling Electrochemically Promoted CO oxidation on Pt/YSZ A B S T R A C T The objective of this work is the formulation of a multi-scale framework for electrochemically promoted systems. We have constructed a 3-Dimensional, isothermal, solid oxide single pellet, multi-scale framework, which describes the chemical and electrochemical phenomena taking place in a solid oxide single pellet under closed-circuit conditions, while the electrochemically promoted oxidation of CO over Pt/YSZ is used as an illustrative system. The proposed framework combines a 3-D macroscopic model which employs the finite element method (FEM) for the simulation of the charge transport and the electrochemical phenomena taking place in the pellet, and an in-house developed efficient implementation of a 2-D lattice kinetic Monte Carlo method (kMC) for the simulation of the reaction-diffusion micro-processes taking place on the catalytic surface. Comparison between the multiscale framework and a macroscopic model [1] is carried out for several sets of operating conditions. Differences between the steady-state outputs of the two models are presented and discussed. A subsequent parametric study using the multi-scale framework is performed to investigate the effect of the gaseous species partial pressures and of the temperature on the CO 2 production rate.

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“…The charge transport in a non-porous media i, is described by the Poisson equation as follows [1,33]:…”

Section: The Macroscopic Modelmentioning

confidence: 99%

Section: The Macroscopic Modelmentioning

confidence: 99%

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Multi-scale Modelling of Electrochemically Promoted Systems

Fragkopoulos

Theodoropoulos

2014

Electrochimica Acta

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“…Although an isothermal state is often imposed on SOFC mathematical models [26,28,51,97,102,128,129], the temperature may not distribute uniformly throughout the cell or stack [130]. Detailed non-isothermal numerical models began to emerge in the early 1990s, such as [131,132].…”

Section: Energy Transfermentioning

confidence: 99%

“…Due to the lack of the experiments based on the planar cell configuration, researchers have to validate their P-SOFC models with button cells [69,129,130].…”

Section: Validationmentioning

confidence: 99%

Reduced cell and stack modeling of planar solid oxide fuel cells

He¹

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First and foremost, I would like to express my sincere gratitude to my supervisor in NTU, Assoc Prof Li Hua, for the opportunity to do research in fuel cell technology. I appreciate his patient instruction and unwavering support through my four-year Ph.D study. I am grateful for all his contributions of time, constructive suggestions, and funding to make my Ph.D fruitful. It is a great experience for me to work under his supervision.

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High Temperature Solid Oxide Electrolysis – Technology and Modeling

Mueller,

Klinsmann,

Sauter

et al. 2023

Chemie Ingenieur Technik

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In the global quest to renounce from fossil fuels, a large demand for the renewable production of hydrogen via water electrolysis exists. In this context, the solid oxide electrolyzer (SOE) is an interesting technology due to its high efficiency resulting from elevated operating temperatures of up to 900 °C. Physical modeling plays a vital role in the development of SOEs, as it lowers experimental costs and provides insight where measurements reach limits. A main challenge for modeling SOEs is the multitude of physical effects, occurring and interacting on various spatial and temporal scales. This requires assumptions and simplifications, particularly when increasing scope and dimensions of a model. In this review, we discuss the different approaches currently available in literature.

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Parametric and transient analysis of non-isothermal, planar solid oxide fuel cells

Cited by 68 publications

References 45 publications

Multi-scale Modelling of Electrochemically Promoted Systems

Multi-scale Modelling of Electrochemically Promoted Systems

Reduced cell and stack modeling of planar solid oxide fuel cells

High Temperature Solid Oxide Electrolysis – Technology and Modeling

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