A numerical model has been developed for the performance analysis of solid oxide fuel cell (SOFC)/micro gas turbine (MGT) hybrid systems with prereforming of natural gas, in which a quasi two-dimensional model has been built up to simulate the cell electrochemical reaction, heat and mass transfer within tubular SOFC. The developed model can be used not only to predict the overall performance of the SOFC/MGT hybrid system but also to reveal the nonuniform temperature distribution within SOFC unit. The effects of turbine inlet temperature (TIT) and pressure ratio (PR) on the performance of the hybrid system have been investigated. The results show that selecting smaller TIT or PR value will lead to relative higher system efficiency and lower CO2 emission ratio; however, this will raise the risk to destroy SOFC beyond the limitation temperature of electrolyte.

References

References
1.
Aguiar
,
P.
,
Brett
,
D. J. L.
, and
Brandon
,
N. P.
,
2008
, “
Solid Oxide Fuel Cell/Gas Turbine Hybrid System Analysis for High-Altitude Long-Endurance Unmanned Aerial Vehicles
,”
Int. J. Hydrogen Energy
,
33
(
23
), pp.
7214
7223
.10.1016/j.ijhydene.2008.09.012
2.
Musa
,
A.
, and
Paepe
,
M. D.
,
2008
, “
Performance of Combined Internally Reformed Intermediate/High Temperature SOFC Cycle Compared to Internally Reformed Two-Staged Intermediate Temperature SOFC Cycle
,”
Int. J. Hydrogen Energy
,
33
(
17
), pp.
4665
4672
.10.1016/j.ijhydene.2008.05.093
3.
Araki
,
T.
,
Taniuchi
,
T.
,
Sunakawa
,
D.
,
Nagahama
,
M.
,
Onda
,
K.
, and
Kato
,
T.
,
2007
, “
Cycle Analysis of Low and High H2 Utilization SOFC/Gas Turbine Combined Cycle for CO2 Recovery
,”
J. Power Sources
,
171
(
2
), pp.
464
470
.10.1016/j.jpowsour.2007.06.002
4.
Lisbona
,
P.
, and
Romeo
,
L. M.
,
2008
, “
Enhanced Coal Gasification Heated by Unmixed Combustion Integrated With an Hybrid System of SOFC/GT
,”
Int. J. Hydrogen Energy
,
33
(
20
), pp.
5755
5764
.10.1016/j.ijhydene.2008.06.031
5.
Chan
,
S. H.
, and
Ding
,
O. L.
,
2005
, “
Simulation of a Solid Oxide Fuel Cell Power System Fed by Methane
,”
Int. J. Hydrogen Energy
,
30
(
2
), pp.
167
169
.10.1016/j.ijhydene.2004.04.001
6.
Chan
,
S. H.
,
Ho
,
H. K.
, and
Tian
,
Y.
,
2003
, “
Modelling for Part-Load Operation of Solid Oxide Fuel Cell-Gas Turbine Hybrid Power Plant
,”
J. Power Sources
,
114
(
2
), pp.
213
227
.10.1016/S0378-7753(02)00613-4
7.
Park
,
S. K.
,
Oh
,
K. S.
, and
Kim
,
T. S.
,
2007
, “
Analysis of the Design of a Pressurized SOFC Hybrid System Using a Fixed Gas Turbine Design
,”
J. Power Sources
,
170
(
1
), pp.
130
139
.10.1016/j.jpowsour.2007.03.067
8.
Achenbach
,
E.
,
1994
, “
Three-Dimensional and Time–Dependent Simulation of a Planar Solid Oxide Fuel Cell Stack
,”
J. Power Sources
,
49
(
1–3
), pp.
333
348
.10.1016/0378-7753(93)01833-4
9.
Zhao
,
H.
,
2010
, “
Performance Analysis of the SOFC/MGT Hybrid Distributed Energy System
,” Degree thesis, Xi'an Jiaotong University, Xi'an, China (in Chinese).
10.
Zhao
,
H.
,
Dang
,
Z.
, and
Xi
,
G.
,
2010
, “
The Investigation of the Coupling Characters of SOFC/MGT Hybrid System
,”
Annual Academic Conference of Chinese Society of Engineering Thermophysics
, Nanjing, China, Nov. 7–10 (in Chinese).
11.
Song
,
T. W.
,
Sohn
,
J. L.
,
Kim
,
J. H.
,
Kim
,
T. S.
,
Ro
,
S. T.
, and
Suzuki
,
K.
,
2005
, “
Performance Analysis of a Tubular Solid Oxide Fuel Cell/Micro Gas Turbine Hybrid System Based on a Quasi-Two Dimensional Model
,”
J. Power Sources
,
142
(
1–2
), pp.
30
42
.10.1016/j.jpowsour.2004.10.011
12.
George
,
R. A.
,
2000
, “
Status of Tubular SOFC Field Unit Demonstrations
,”
J. Power Sources
,
86
(
1–2
), pp.
134
139
.10.1016/S0378-7753(99)00413-9
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