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Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate

VENKATA, PADMA PRIYA
http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104

Abstract Details

2008, MS, University of Cincinnati, Engineering : Mechanical Engineering.
A three dimensional computational model of an intermediate temperature planar, tri-layered solid oxide fuel cell is considered for a steady incompressible fully developed laminar flow in the interconnect ducts of rectangular cross section. A constant supply of volatile species (80% H2 + 20% H2O vapor) and oxidant (20% O2 + 80% N2) is maintained at the electrolyte surface on the anode and cathode side respectively. The governing equations of mass, momentum and energy coupled with the electrochemical species equations are solved computationally. Darcy-Forchheimer model is used to account for the porosity effects of the electrodes where the flow is in thermal equilibrium with the solid matrix. The anode-side triple phase boundary is resolved as a finite region to accurately capture the physics of electrochemical reaction which results in current generation and volumetric heat dissipation. Parametric effects of the interconnect contact design and channel aspect ratio on the variation of thermal-hydrodynamic and electrical performances of the cell are presented. The effect of the flow rate and duct aspect ratio on the area-specific resistance and its subsequent effects on current density, temperature and mass/species distributions, flow friction factor and convective heat transfer coefficient are presented. Interconnect channels of cross-section aspect ratio ~0.5-2.0 and interconnect channel half width of 500 µm are compared for overall electrical and convective cooling performance of the planar anode-supported SOFC.
Raj M Manglik, PhD (Advisor)
Milind A Jog, PhD (Committee Member)
Anastasios P Angelopoulos, PhD (Committee Member)
58 p.
Mechanical Engineering
SOFC; Solid oxide fuel cells; ASR; interconnect; CFD; heat and mass transfer; electrochemistry

Recommended Citations

Citations

  • VENKATA, P. P. (2008). Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104

    APA Style (7th edition)

  • VENKATA, PADMA PRIYA. Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate. 2008. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104.

    MLA Style (8th edition)

  • VENKATA, PADMA PRIYA. "Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate." Master's thesis, University of Cincinnati, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104

    Chicago Manual of Style (17th edition)

ucin1205169104
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© 2008, all rights reserved.
This open access ETD is published by University of Cincinnati and OhioLINK.