elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Investigation of locally resolved SOFC characteristics along the flow path

Friedrich, Kaspar Andreas and Metzger, Patrick and Schiller, Günter and Müller-Steinhagen, Hans (2007) Investigation of locally resolved SOFC characteristics along the flow path. ECS Transactions, 7 (1), pp. 1841-1847. The Electrochemical Society of America. DOI: 10.1149/1.2729296

[img] PDF - Registered users only
440kB

Official URL: http://ecsdl.org/v

Abstract

Solid oxide fuel cells (SOFCs) are characterized locally in a segmented cell arrangement. The tests were performed in counter flow operation for hydrogen concentrations from 2% to 100% to identify concentration limitations and to optimize fuel utilization. Cell characterisations were obtained for different cell concepts by voltage/current density U(i) and temperature measurements as well as gas chromatography measurements at 16 distinct points across the cell. The results show a substantial variation of current density and voltage distribution along the flow path with varying hydrogen content and fuel utilization. Especially at high fuel utilizations approaching 100% a dramatic dependence of power density along the flow path occurs which is associated with increasing degradation. The observation of inhomogeneous temperature distribution emphasizes the importance of thermal management adapted to the cell operation characteristics, particularly when the stack itself only has a low thermal mass.

Item URL in elib:https://elib.dlr.de/20948/
Document Type:Article
Title:Investigation of locally resolved SOFC characteristics along the flow path
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Friedrich, Kaspar AndreasUNSPECIFIEDUNSPECIFIED
Metzger, PatrickUNSPECIFIEDUNSPECIFIED
Schiller, GünterUNSPECIFIEDUNSPECIFIED
Müller-Steinhagen, HansUNSPECIFIEDUNSPECIFIED
Date:February 2007
Journal or Publication Title:ECS Transactions
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:7
DOI :10.1149/1.2729296
Page Range:pp. 1841-1847
Publisher:The Electrochemical Society of America
Status:Published
Keywords:solid oxide fuel cell, local resoluton, segmentation
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E BZ - Fuel cells (old)
DLR - Research area:Energy
DLR - Program:E BZ - Fuel cells
DLR - Research theme (Project):E - Hochtemperatur-Brennstoffzellen (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Friedrich, Prof.Dr. Kaspar Andreas
Deposited On:15 Oct 2007
Last Modified:12 Dec 2013 20:09

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.