Radiative and convective heat transport within tubular solid-oxide fuel-cell stacks

Kee, Robert J.; Kee, Benjamin L.; Martin, Jerry L.

doi:10.1016/j.jpowsour.2010.04.010

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…Kattke et al 45 developed a comprehensive computational fluid dynamics model for a tubular solid-oxide fuel cell stack. Kee et al 46 developed radiation configuration factors to model alternative tube-stack arrangements. Especially at higher temperatures, thermalradiation transport can be important in controlling thermal behavior.…”

Section: Tubular Stacksmentioning

confidence: 99%

Perspectives on Technical Challenges and Scaling Considerations for Tubular Protonic-Ceramic Electrolysis Cells and Stacks

Kee¹,

Ricote²,

Zhu³

et al. 2022

J. Electrochem. Soc.

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Proton-conducting ceramics (protonic ceramics) form the basis for applications that include intermediate-temperature (e.g., $500$--$700$~$^\circ$C) fuel cells, electrolyzers, and membrane reactors. The electrolyte membranes are typically perovskites such as heterovalently doped barium cerates and zirconates (e.g., BaCe$_{1-x-y}$Zr$_x$Y$_y$O$_{3-\delta}$, BCZY; and BaCe$_{1-x-y-z}$Zr$_x$Y$_y$Yb$_z$O$_{3-\delta}$, BCZYYb). Although the materials are dominantly proton conductors, they are mixed ionic-electronic conductors (MIEC) with oxygen-ion and small-polaron mobility. The present paper is concerned primarily with steam-electrolysis applications with the reactors using tubular cell configurations. An important advantage of the protonic-ceramic cells is that they can produce nearly dry hydrogen. Each tubular cell is comprised of a negatrode (electrolysis cathode), proton-conducting electrolyte membrane, and a positrode (electrolysis anode). The tubular cells are typically supported on the relatively thick (order of one millimeter) composite negatrode, with thin (order tens of microns) external membrane and positrode layers. The paper explores considerations for scaling from laboratory-based demonstrations to deployable technology.

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Section: Tubular Stacksmentioning

confidence: 99%

Perspectives on Technical Challenges and Scaling Considerations for Tubular Protonic-Ceramic Electrolysis Cells and Stacks

Kee¹,

Ricote²,

Zhu³

et al. 2022

J. Electrochem. Soc.

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“…The geometry of a cylinder array is widely applied in industrial processes, i.e. heat pipe heat exchanger (HPHEX) in waste heat recovery system [1][2][3], rob bundles in nuclear reactor [4][5][6], pin-fin tubes [7][8][9], pin-fin heat sink for thermal management [10][11][12][13][14][15][16][17][18], solid oxide fuel cells (SOFCs) [19,20] and solar receivers in concentrated solar power(CSP) system [21][22][23]. Many studies focused on the convective heat transfer between the fluid and the bundles' surface.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, the evaluation of radiation heat transfer between cylinders is of particular interest. Indeed, the evaluation of the radiation heat transfer within the cylinder array depends on the view factor or the geometric configuration factor [19]. The view factor is defined as the fraction of energy leaving one diffuse surface element (E1) and arrives at another element (E2) [26].…”

Section: Introductionmentioning

confidence: 99%

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A modified numerical integration method to calculate the view factor between finite and infinite cylinders in arbitrary array

Jiang

Wang

Behar

et al. 2020

Annals of Nuclear Energy

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The view factor has a critical impact on the estimation of the radiation heat transfer between different surfaces of energy systems. This paper presents an alternate and simple method for the blocking judgment and a modified numerical integration approach to calculate the view factor between finite and infinite length cylinders in an arbitrary array. The proposed method has been successfully validated through a comparison with the state-of-the-art published methods. Two cases are studied: (i) cylinders arranged in a staggered array for different spacing and lengths; (ii) cylinders arranged in an arbitrary array. The results show that the proposed method provides a fast and accurate way to evaluate the view factor for cylinder arrays with similar length. The analysis reveals that the length and arrangements have a strong influence on the view factor. The proposed method might be very useful to design an improved compact heat exchanger using a nonstandard arrangements.

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“…Several SOFC modelling studies appeared last years, trying to investigate radiation heat effect such as the works of Grzegorz Brus et al [6], Kee et al [7], Bao et al [8], Imen Majeri et al [9], García-Camprubí et al [10] and Ferrero et al [11]. However, all the existing models considered only ohmic heat by joule effect, neglecting radiation heat in the energy equation and didn't take into account other possible heat sources caused by concentration and activation overpotentials and chemical reaction such as the work of Ismet Tikiz et al [12] and van Biert et al [13].…”

Section: Introductionmentioning

confidence: 99%

SOFC modelling considering radiation heat transfer

Alimi

Chouikh

Guizani

2020

Mechanics & Industry

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In this study, the influence of radiation heat transfer within a planar SOFC is investigated. The numerical model is made by performing two-dimension mathematical model describing mass, momentum and heat transport phenomena coupled with electrochemical reactions. The finite volume method is used to solve the governing equations. Compared with literature results, the simulations show that radiation reduces temperature gradients and has a significant effect on enhancing heat transfer within the SOFC and counter balancing thermal dissipation induced by activation, concentration and ohmic polarisations. Thus, it must be included for an accurate model.

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Radiative and convective heat transport within tubular solid-oxide fuel-cell stacks

Cited by 6 publications

References 2 publications

Perspectives on Technical Challenges and Scaling Considerations for Tubular Protonic-Ceramic Electrolysis Cells and Stacks

Perspectives on Technical Challenges and Scaling Considerations for Tubular Protonic-Ceramic Electrolysis Cells and Stacks

A modified numerical integration method to calculate the view factor between finite and infinite cylinders in arbitrary array

SOFC modelling considering radiation heat transfer

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