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Pressurized solid oxide fuel cells: Experimental studies and modeling

Seidler, Stephanie and Henke, Moritz and Kallo, Josef and Bessler, Wolfgang G. and Maier, Uwe and Friedrich, K. Andreas (2011) Pressurized solid oxide fuel cells: Experimental studies and modeling. Journal of Power Sources, 196, pp. 7195-7202. Elsevier. DOI: 10.1016/j.jpowsour.2010.09.100 ISSN 0378-7753

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Abstract

The hybrid power plant project at DLR aims at investigating the fundamentals and requirements of a combined fuel cell and gas turbine power plant. A specific aim is to demonstrate stable operation of a plant in the 50 kW class. Prerequisite for the power plant realization is the detailed characterization of each subsystem and their interactions. The pressurized solid oxide fuel cell (SOFC) is an essential part of one main subsystem. A combined theoretical and experimental approach allows a thorough insight into nonlinear behavior. This paper focuses on the influence of pressurization on SOFC performance in the range from 1.4 to 3 bar. Conclusions are based on experimental V(i)-characteristics as well as on overpotentials derived from elementary kinetic models. Experiments are performed on planar, anodesupported 5-cell short stacks. The performance increases from 284 mW cm−2 at 1.4 bar to 307 mW cm−2 at 2 bar and 323 mW cm−2 at 3 bar (at 0.9 V; anode: H2/N2 1/1; cathode: air; temperature: 800 ◦C). The benefit of a temperature rise increases at elevated pressures. Moreover, the effect of gas variation is enhanced at higher pressures. The main conclusion is that pressurization improves the performance. Due to different effects interfering, operation of pressurized SOFC requires further detailed analysis.

Item URL in elib:https://elib.dlr.de/70369/
Document Type:Article
Title:Pressurized solid oxide fuel cells: Experimental studies and modeling
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Seidler, StephanieDLRUNSPECIFIED
Henke, MoritzDLRUNSPECIFIED
Kallo, JosefDLRUNSPECIFIED
Bessler, Wolfgang G.DLRUNSPECIFIED
Maier, UweElringKlingerUNSPECIFIED
Friedrich, K. AndreasDLRUNSPECIFIED
Date:2011
Journal or Publication Title:Journal of Power Sources
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:196
DOI :10.1016/j.jpowsour.2010.09.100
Page Range:pp. 7195-7202
Publisher:Elsevier
ISSN:0378-7753
Status:Published
Keywords:Solid oxide fuel cell, pressurization, SOFC, Hybrid power plant, experiment, modeling
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E VG - Combustion and Gas Turbine Technologies (old), E EV - Energy process technology (old), E BZ - Fuel cells (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies, E EV - Energy process technology, E BZ - Fuel cells
DLR - Research theme (Project):E - Hybridkraftwerke (old), E - Elektrochemische Prozesse (old), E - Hochtemperatur-Brennstoffzellen (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Henke, Moritz
Deposited On:13 Jul 2011 11:36
Last Modified:10 Jan 2019 15:48

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