The efficient end environmentally friendly production of electricity is undoubtedly one of the 21st century priorities. Since renewable sources will be able to guarantee only a share of the future demand, the present research activity must focus on innovative energy devices and improved conversion systems and cycles. Great expectations are reserved to fuel cell systems. The direct conversion from chemical to electrical energy eliminates environmental problems connected with combustion and bypass the stringent efficiency limit due to Carnot’s principle. Still in infancy, high-temperature fuel cells present the further advantage of feasible cycle integration with steam or gas turbines. In this paper, a molten carbonate fuel cell plant is simulated in a cycle for power generation. The introduction of an external combustion gas turbine is evaluated with the aim of efficiency and net power output increase. The results show that the proposed cycle can be conveniently used as a source of power generation. As compared to internal combustion gas turbine hybrid cycles found in the literature the plant is characterized by fuel cell greater simplicity, due to the absence of pressurization, and gas turbine increased complexity, due to the presence of the heat exchange system.

Issue Section:
Gas Turbines: Cycle Innovations, and Combustion and Fuels
Keywords:
fuel cell power plants, molten carbonate fuel cells, gas turbines, heat exchangers, power generation planning, atmospheric pressure, optimisation, modelling
Topics:
Cycles, Fuel cells, Gas turbines, Molten carbonate fuel cells, Pressure, Steam, Heat
1.
Kordesch, K., and Simader, G., 1996, Fuel Cells and Their Applications, Wheinheim.
2.
Ali, S. A., and Moritz, R., 2000, “A Prototype for the First Commercial Pressurized Fuel Cell System,” ASME Paper No. 2000-GT-551.
3.
Hussey
,
L.
,
1999
, “
Room-Temperature Molten Salts: A Bright Future for Applications in Clean Technology
,”
Electrochem.
,
67
(
16
), p.
527
527
.
4.
Ito, K., Gamou, S., and Yokoyama, R., 1997, “Optimal Unit Sizing of Fuel Cell Cogeneration Systems in Consideration of Performance Degradation,” Proceedings of Flowers ’97, Florence World Energy Research Symposium, Florence, Italy.
5.
Lobachyov, K. V. and Richter, H. J., 1997, “Performance and Economics of Advanced Integrated Biomass Gasification Carbonate Fuel Cell Power Systems,” Proceedings of Flowers’ 97, Florence World Energy Research Symposium, Florence, Italy.
6.
Layne, A., et al., 2000, “Hybrid Heat Engines: The Power Generation Systems of the Future,” ASME Paper No. 2000-GT-0549.
7.
Randall, G., et al., “Development of Dynamic Modeling Tools for Solide Oxide and Molten Carbonate Hybrid Fuel Gas Turbine Systems,” ASME Paper No. 2000-GT-554.
8.
Massardo, A., and Bosio, B., 2000, “Assessment of a Molten Carbonate Fuel Cell Models and Integration With Gas and Steam Cycles,” ASME Paper No. 2000-GT-174.
9.
Lunghi
,
P.
,
Ubertini
,
S.
, and
Desideri
,
U.
,
2000
, “
Highly Efficienty Electricity Generation Through a Hybrid Molten Carbonate Fuel Cell-Close Loop Gas Turbine Plant
,”
Energy Convers. & Manage.
,
42
(
14
), pp.
1657
–
1672
.
10.
Leo, A., et al., 2000, “Ultra High Efficiency Hybrid Direct Fuel Cell/Turbine Power Plant,” ASME Paper No. 2000-GT-0552.
11.
Faroogue, M., 1993, “MCFC Power Plant System Verification,” Proceedings of FE Fuel Cells and Coal-Fired Heat Engines Conference, Library Binding, US DOE/METC, Aug. 3–5.
12.
Braun
,
R. J.
,
Gaggioli
,
R. A.
, and
Dunbar
,
W. R.
,
1999
, “
Improvements of a Molten Carbonate Fuel Cell Power Plant via Exergy Analysis
,”
Energy Resource Technol.
,
121
, pp.
277
–
285
.
13.
Desideri, U., Lunghi, P., and Ubertini, S., 2000, “Thermodynamic Analysis of a Molten Carbonate Fuel Cell System Using Waste Derived Fuel Gas,” ASME IMECE, Orlando, Florida, Nov. 5–10.
14.
Hirchenhofer, J. H., et al., 1998, Fuel Cell Handbook, 4th Ed., Persons Corp., Reading, PA.
15.
Redlich
,
O.
, and
Kwong
,
J. N. S.
,
1979
, “
On the Thermodynamics of Solutions V. An Equation-of-State. Fugacities of Gaseous Solutions
,”
Chem. Rev.
,
44
, pp.
223
–
244
.
16.
Haar, L., and Gallagher, J. S., and Kell, J. H., 1984, NBS/NRC Steam Tables, Hemisphere, Washington DC.
17.
ASPEN PLUS Simulation Code, Release 10.1, 1999, Aspen Technology Inc., Cambridge, MA.
18.
Lozza, G., 1996, Turbine a Gas e Cicli Combinati, Progetto Leonardo, Bologna.
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 by ASME
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