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A validated multi-scale model of a SOFC stack at elevated pressure

Henke, Moritz and Willich, Caroline and Westner, Christina and Leucht, Florian and Kallo, Josef and Bessler, Wolfgang G. and Friedrich, K. Andreas (2013) A validated multi-scale model of a SOFC stack at elevated pressure. Fuel Cells, 13 (5), pp. 773-780. Wiley. DOI: 10.1002/fuce.201300076 ISSN 1615-6846

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Abstract

This paper presents a multi-scale model of a solid oxide fuel cell (SOFC) stack consisting of five anode-supported cells. A two-dimensional isothermal elementary kinetic model is used to calculate the performance of single cells. Several of these models are thermally coupled to form the stack model. Simulations can be carried out at steady-state as well as dynamic operation. The model is validated over a wide range of operating conditions including variation of temperature, gas composition (both on anode and cathode side), and pressure. Validation is carried out using polarization curves and impedance spectra. The model is then used to explain the pressure-induced performance increase measured at constant fuel utilization of 40%. Results show that activation and concentration overpotentials are reduced with increasing pressure.

Item URL in elib:https://elib.dlr.de/84935/
Document Type:Article
Title:A validated multi-scale model of a SOFC stack at elevated pressure
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Henke, Moritzmoritz.henke (at) dlr.deUNSPECIFIED
Willich, Carolinecaroline.willich (at) dlr.deUNSPECIFIED
Westner, Christina UNSPECIFIEDUNSPECIFIED
Leucht, Florianflorian.leucht (at) dlr.deUNSPECIFIED
Kallo, Josefjosef.kallo (at) dlr.deUNSPECIFIED
Bessler, Wolfgang G.wolfgang.bessler (at) hs-offenburg.deUNSPECIFIED
Friedrich, K. Andreasandreas.friedrich (at) dlr.deUNSPECIFIED
Date:30 August 2013
Journal or Publication Title:Fuel Cells
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:13
DOI :10.1002/fuce.201300076
Page Range:pp. 773-780
Publisher:Wiley
ISSN:1615-6846
Status:Published
Keywords:Electrochemical Impedance Spectroscopy, EIS, Experimental Results, Modeling, Pressurized SOFC, SOFC, Solid Oxide Fuel Cell
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Elektrochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Henke, Moritz
Deposited On:05 Nov 2013 15:08
Last Modified:06 Sep 2019 15:15

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