For start-up of tubular solid oxide fuel cells preheating concepts of gas heating, induction heating, sequential hybrid of gas and induction heating and concurrent hybrid of gas and induction heating were experimented. Due to impossibility of heating-up of porous electric conductive layers in electromagnetic field, stainless steel material was adopted for the gas distributor tube, which is readily heated by induction method and transfers heat to adjacent layers. Start-up times of 95, 31, 49 and 20 seconds were attained for gas heating, induction heating, hybrid of sequential gas and inductive heating and hybrid of concurrent gas and induction heating methods respectively. Axial distribution of temperature in the course of start-up was steadier in hybrid methods which resulted in diminished axial temperature gradient and reduced performance degradation of the cell. A numerical model was developed and calibrated to predict the preheating phenomenon. Analytical results implied the positive effect of layers porosity on the heating rate, concerning mainly the gas heating methods.

References

References
1.
Lawlor
,
V.
,
Griesser
,
S.
,
Buchinger
,
G.
,
Olabi
,
A. G.
,
Cordiner
,
S.
, and
Meissner
,
D.
, 2009, “
Review of the Micro-Tubular Solid Oxide Fuel Cell: Part I. Stack Design Issues and Research Activities
,”
J. Power Sources
,
193
(
2
), pp.
387
399
.
2.
Matus
,
Y. B.
,
De Jonghe
,
L. C.
,
Jacobson
,
C. P.
, and
Visco
,
S. J.
, 2005, “
Metal-Supported Solid Oxide Fuel Cell Membranes for Rapid Thermal Cycling
,”
Solid State Ionics
,
176
(
5–6
), pp.
443
449
.
3.
Sakai
,
N.
,
Horita
,
T.
,
Yamaji
,
K.
,
Ping Xiong
,
Y.
,
Kishimoto
,
H.
,
Brito
,
M. E.
, and
Yokokawa
,
H.
, 2006, “
Material Transport and Degradation Behavior of SOFC Interconnects
,”
Solid State Ionics
,
177
(
19–25
), pp.
1933
1939
.
4.
Kendall
,
K.
,
Finnerty
,
C. M.
,
Saunders
,
G.
, and
Chung
,
J. T.
, 2002, “
Effects of Dilution on Methane Entering an SOFC Anode
,”
J. Power Sources
,
106
(
1–2
), pp.
323
327
.
5.
Liu
,
M.
,
Dong
,
D.
,
Peng
,
R.
,
Gao
,
J.
,
Diwu
,
J.
,
Liu
,
X.
, and
Meng
,
G.
, 2008, “
YSZ-Based SOFC with Modified Electrode/Electrolyte Interfaces for Operating at Temperature Lower than 650°C
,”
J. Power Sources
,
180
(
1
), pp.
215
220
.
6.
Han
,
M. F.
,
Yin
,
H. Y.
, and
Miao
,
W. T.
, 2008, “
Fabrication and Properties of Anode-Supported Solid Oxide Fuel Cell
,”
Solid State Ionics
,
179
(
27–32
), pp.
1545
1548
.
7.
Shao
,
Z.
,
Haile
,
S. M.
,
Ahn
,
J.
,
Ronney
,
P. D.
,
Zhan
,
Z.
, and
Barnett
,
S. A.
, 2005, “
A Thermally Self-Sustained Micro Solid-Oxide Fuel Cell with High Power Density
,”
Nature
435
, p.
795
.
8.
Bujalski
,
W.
,
Dikwal
,
C. M.
, and
Kendall
,
K.
, 2007, “
Cycling of Three Solid Oxide Fuel Cell Types
,”
J. Power Sources
,
171
, pp.
96
100
.
9.
Sammes
,
N. M.
,
Du
,
Y.
, and
Bove
,
R.
, 2005, “
Design and Fabrication of a 100W Anode Supported Micro-Tubular SOFC Stack Density
,”
J. Power Sources
,
145
(
2
), pp.
428
434
.
10.
Nield
,
D. A.,
and
Bejan
,
A.
, 1999,
Convection in Porous Media
,
2nd ed.
,
Springer
,
New York
.
11.
Kar
,
K.
, and
Dybbs
,
A.
, 1982, “
International Heat Transfer Coefficients in Porous Media
,”
Heat Transfer in Porous Media
,
J. V.
Beck
and
L. S.
Yao
, eds.,
HTD-22
,
ASME
New York
.
12.
Holman
,
J. P.
, 1981,
Heat Transfer
,
McGraw-Hill
,
New York
.
13.
Damm
,
D.
, and
Fedorov
,
A.
, 2005, “
Spectral Radiative Heat Transfer Analysis of the Planar SOFC
,”
ASME J. Fuel Cell Sci. Technol.
, Vol.
2
(
4
), pp.
258
262
.
14.
COMSOL Ltd, FEMLAB®, Version 3.4 User’s Guide, 1994, Copyright 1994-2007, United Kingdom, COMSOL LTD., Available at: http://www.femlab.chhttp://www.femlab.ch.
15.
Ho, Thinh
,
X.
,
Kosinski
,
P
, and
Hoffmann
,
A. C.
, and
Vik
,
A.
, 2008, “
Numerical Modeling of Solid Oxide Fuel Cells
,”
Chem. Eng. Sci.
63
, pp.
5356
5365
.
16.
Sunden
,
B.
, and
Faghri
,
M.
, 2005,
Transport Phenomena in Fuel Cells
,
Witpress
,
Boston
.
17.
Ji
,
Y.
,
Yuan
,
K.
,
Chung
,
J. N.
, and
Chen
,
Y. C.
, 2006, “
Effects of Transport Scale on Heat/Mass Transfer and Performance Optimization for Solid Oxide Fuel Cells
,”
J. Power Sources
,
161
(
1
), pp.
380
391
.
This content is only available via PDF.
You do not currently have access to this content.