Determination of Temperature and Fuel Utilization Distributions in SOFC Stacks with EIS

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)

Abstract

Efficient operation of solid oxide fuel cell (SOFC) stacks requires uniform temperature and fuel utilization distributions in the stack. Especially high fuel utilizations necessitate uniform fuel flow dis-tributions to avoid performance decrease or anode reoxidation. A uniform temperature distribution helps to prolong the life-time of the stack. This work presents a method to determine the fuel utili-zation and temperature distribution in SOFC stacks with electro-chemical impedance spectroscopy (EIS). The equations for relat-ing the measured impedance and fuel utilization and temperature are derived from physical equations describing the SOFC stack. The method is demonstrated with an ElringKlinger AG 10-cell stack fuelled with 50%/50% H2/N2 at nominal operation condi-tions. The difference in temperature and fuel utilization between cells was determined. The calculated distributions are in line with cell voltage measurements. The method can be used to improve SOFC stack design and performance.
Original languageEnglish
Pages (from-to)2141-2150
Number of pages10
JournalECS Transactions
Volume78
Issue number1
DOIs
Publication statusPublished - 30 May 2017
MoE publication typeA1 Journal article-refereed
Event15th International Symposium on Solid Oxide Fuel Cells, SOFC XV - Hollywood, United States
Duration: 23 Jul 201728 Jul 2017

Fingerprint

Solid oxide fuel cells (SOFC)
Electrochemical impedance spectroscopy
Temperature
Temperature distribution
Voltage measurement
Anodes

Cite this

@article{3db2f208e5c04106a4cbcf82ef000ecf,
title = "Determination of Temperature and Fuel Utilization Distributions in SOFC Stacks with EIS",
abstract = "Efficient operation of solid oxide fuel cell (SOFC) stacks requires uniform temperature and fuel utilization distributions in the stack. Especially high fuel utilizations necessitate uniform fuel flow dis-tributions to avoid performance decrease or anode reoxidation. A uniform temperature distribution helps to prolong the life-time of the stack. This work presents a method to determine the fuel utili-zation and temperature distribution in SOFC stacks with electro-chemical impedance spectroscopy (EIS). The equations for relat-ing the measured impedance and fuel utilization and temperature are derived from physical equations describing the SOFC stack. The method is demonstrated with an ElringKlinger AG 10-cell stack fuelled with 50{\%}/50{\%} H2/N2 at nominal operation condi-tions. The difference in temperature and fuel utilization between cells was determined. The calculated distributions are in line with cell voltage measurements. The method can be used to improve SOFC stack design and performance.",
author = "Johan Tallgren and {Boigues Mu{\~n}oz}, Carlos and Jyrki Mikkola and Olli Himanen and Jari Kiviaho",
year = "2017",
month = "5",
day = "30",
doi = "10.1149/07801.2141ecst",
language = "English",
volume = "78",
pages = "2141--2150",
journal = "ECS Transactions",
issn = "1938-5862",
publisher = "Electrochemical Society ECS",
number = "1",

}

Determination of Temperature and Fuel Utilization Distributions in SOFC Stacks with EIS. / Tallgren, Johan; Boigues Muñoz, Carlos; Mikkola, Jyrki; Himanen, Olli; Kiviaho, Jari.

In: ECS Transactions, Vol. 78, No. 1, 30.05.2017, p. 2141-2150.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Determination of Temperature and Fuel Utilization Distributions in SOFC Stacks with EIS

AU - Tallgren, Johan

AU - Boigues Muñoz, Carlos

AU - Mikkola, Jyrki

AU - Himanen, Olli

AU - Kiviaho, Jari

PY - 2017/5/30

Y1 - 2017/5/30

N2 - Efficient operation of solid oxide fuel cell (SOFC) stacks requires uniform temperature and fuel utilization distributions in the stack. Especially high fuel utilizations necessitate uniform fuel flow dis-tributions to avoid performance decrease or anode reoxidation. A uniform temperature distribution helps to prolong the life-time of the stack. This work presents a method to determine the fuel utili-zation and temperature distribution in SOFC stacks with electro-chemical impedance spectroscopy (EIS). The equations for relat-ing the measured impedance and fuel utilization and temperature are derived from physical equations describing the SOFC stack. The method is demonstrated with an ElringKlinger AG 10-cell stack fuelled with 50%/50% H2/N2 at nominal operation condi-tions. The difference in temperature and fuel utilization between cells was determined. The calculated distributions are in line with cell voltage measurements. The method can be used to improve SOFC stack design and performance.

AB - Efficient operation of solid oxide fuel cell (SOFC) stacks requires uniform temperature and fuel utilization distributions in the stack. Especially high fuel utilizations necessitate uniform fuel flow dis-tributions to avoid performance decrease or anode reoxidation. A uniform temperature distribution helps to prolong the life-time of the stack. This work presents a method to determine the fuel utili-zation and temperature distribution in SOFC stacks with electro-chemical impedance spectroscopy (EIS). The equations for relat-ing the measured impedance and fuel utilization and temperature are derived from physical equations describing the SOFC stack. The method is demonstrated with an ElringKlinger AG 10-cell stack fuelled with 50%/50% H2/N2 at nominal operation condi-tions. The difference in temperature and fuel utilization between cells was determined. The calculated distributions are in line with cell voltage measurements. The method can be used to improve SOFC stack design and performance.

UR - http://www.scopus.com/inward/record.url?scp=85028454161&partnerID=8YFLogxK

U2 - 10.1149/07801.2141ecst

DO - 10.1149/07801.2141ecst

M3 - Article

VL - 78

SP - 2141

EP - 2150

JO - ECS Transactions

JF - ECS Transactions

SN - 1938-5862

IS - 1

ER -