The current work shall prove the feasibility and show methods to safely operate a simple SOFC/GT hybrid system under part-load and load change. Dynamic and steady state studies on a detailed model of a SOFC/GT hybrid system have been performed. A design point is selected. Steady-state part-load behavior is shown by means of performance maps. An operation line with fairly constant temperatures in the upper part-load regime and an almost constant efficiency down to approximately 25% part-load is proposed and the dynamic behavior of the system on rapid load changes is investigated. Strategies for the dynamic controlling of power by manipulating fuel flow are shown that might enable the system to adapt to a new setpoint power quite quickly.

1.
Stiller
,
C.
,
Thorud
,
B.
,
Seljebø
,
S.
,
Mathisen
,
Ø.
,
Karoliussen
,
H.
, and
Bolland
,
O.
, 2004, “
Finite-Volume Modeling and Hybrid-Cycle Performance of Planar and Tubular Solid Oxide Fuel Cells
,”
J. Power Sources
0378-7753 (to be published).
2.
Rao
,
D.
, and
Samuelsen
,
G. S.
, 2001, “
A Thermodynamic Analysis of Tubular SOFC Based Hybrid Systems
,” ASME Paper 2001-GT-0522.
3.
Chan
,
S. H.
,
Ho
,
H. K.
, and
Tian
,
Y.
, 2003, “
Modeling for Part-Load Operation of Solid Oxide Fuel Cell-Gas Turbine Hybrid Power Plant
,”
J. Power Sources
0378-7753,
114
, pp.
213
227
.
4.
Pålsson
,
J.
,
Selimovic
,
A.
, and
Sjunnesson
,
L.
, 2000, “
Combined Solid Oxide Fuel Cell and Gas Turbine Systems for Efficient Power and Heat Generation
,”
J. Power Sources
0378-7753,
86
, pp.
442
448
.
5.
Veyo
,
S. E.
,
Lundberg
,
W. L.
,
Vora
,
S. D.
, and
Litzinger
,
K. P.
, 2003, “
Tubular SOFC Hybrid Power System Status
,” ASME Paper 2003-GT-38943.
6.
Achenbach
,
E.
, 1995, “
Response of a Solid Oxide Fuel Cell to Load Change
,”
J. Power Sources
0378-7753,
57
, pp.
105
109
.
7.
Costamagna
,
P.
,
Magistri
,
L.
, and
Massardo
,
A. F.
, 2001, “
Design and Part-Load Performance of a Hybrid System Based on a Solid Oxide Fuel Cell Reactor and a Micro Gas Turbine
,”
J. Power Sources
0378-7753,
96
, pp.
352
368
.
8.
Campanari
,
S.
, 2000, “
Full Load and Part Load Performance Prediction for Integrated SOFC and Microturbine Systems
,”
J. Eng. Gas Turbines Power
0742-4795,
122
, pp.
239
246
.
9.
Pålsson
,
J.
, and
Selimovic
,
A.
, 2001, “
Design and Off-Design Predictions of a Combined SOFC and Gas Turbine System
,” ASME Paper 2001-GT-0379.
10.
Kimijima
,
S.
, and
Kasagi
,
N.
, 2002, “
Performance Evaluation of Gas Turbine-Fuel Cell Hybrid Micro Generation System
,” ASME Paper 2002-GT-30111.
11.
Thorud
,
B.
,
Stiller
,
C.
,
Weydahl
,
T.
,
Bolland
,
O.
, and
Karoliussen
,
H.
, 2004, “
Part-Load and Load-Change Simulation of Tubular SOFC Systems
,” Sixth European Solid Oxide Fuel Cell Forum, Lucerne, Switzerland.
12.
Rao
,
A. D.
, and
Samuelsen
,
G. S.
, 2002, “
Analysis Strategies for Tubular Solid Oxide Fuel Cell Based Hybrid Systems
,”
J. Eng. Gas Turbines Power
0742-4795,
124
, pp.
503
509
.
13.
Song
,
T. W.
,
Sohn
,
J. L.
,
Kim
,
J. H.
,
Kim
,
T. S.
,
Ro
,
S. T.
, and
Suzuki
,
K.
, 2004, “
Parametric Studies for a Performance Analysis of a SOFC/MGT Hybrid Power System Based on a Quasi-2D Model
,” ASME Paper 2004-GT-53304.
14.
gPROMS (General Process Modelling and Simulation Tool), v.2.3.3, Process Systems Enterprise Ltd., London, http://www.psenterprise.com/http://www.psenterprise.com/.
15.
Marsano
,
F.
,
Magistri
,
L.
, and
Massardo
,
A. F.
, 2004, “
Ejector Performance on a Solid Oxide Fuel Cell Anodic Recirculation System
,”
J. Power Sources
0378-7753,
129
, pp.
216
228
.
16.
Kurzke
,
J.
, 2004,
Compressor and Turbine Maps for Gas Turbine Performance Computer Programs—Component Map Collection 2
,
Joachim Kurzke
, Dachau, Germany.
17.
Yi
,
Y.
,
Smith
,
T. P.
,
Brouwer
,
J.
,
Rao
,
A. D.
, and
Samuelsen
,
G. S.
, 2003, “
Simulation of a 220Kw Hybrid SOFC Gas Turbine System and Data Comparison 2003
,”
Proc.-Electrochem. Soc.
0161-6374,
7
, pp.
1442
1454
.
18.
Johannesen
,
N. H.
, 1951, “
Ejector Theory and Experiments
,” Dissertation, Danish Academy of Technical Sciences,
Copenhagen
, Denmark.
19.
Achenbach
,
E.
, and
Riensche
,
E.
, 1994, “
Methane/Steam Reforming Kinetics for Solid Oxide Fuel Cells
,”
J. Power Sources
0378-7753,
52
, pp.
283
288
.
20.
Karoliussen
,
H.
,
Nisancioglu
,
K.
,
Solheim
,
A.
, and
Ødegård
,
R.
, 1992, “
SOFC Stack Modeling With Internal Reforming
,” Fourth IEA Workshop on SOFC,
Lausanne
, Switzerland.
21.
Nisancioglu
,
K.
, 1989, “
Ohmic Losses
,” Natural Gas Fuelled Solid Oxide Fuel Cells and Systems, IEA Workshop on Mathematical Modelling, Charmey, Switzerland.
22.
Reid
,
R. C.
,
Prausnitz
,
J. M.
, and
Poling
,
B. E.
, 1987,
The Properties of Gases and Liquids
,
McGraw-Hill
, New York.
23.
Mills
,
A. F.
, 1995,
Heat and Mass Transfer
,
Irwin
, Chicago.
You do not currently have access to this content.