Modelling and Simulation of a Hybrid Solid Oxide Fuel Cell Coupled with a Gas Turbine Power Plant

Year 2009, Volume: 12 Issue: 3, 131 - 139, 01.09.2009

Valentina Amati Enrico Sciubba , Claudia Toro , Luca Andreassi

Abstract

The paper presents a simulation of a hybrid solid oxide fuel cell-gas turbine (SOFC-GT) power generation system fueled by natural gas. In the system considered, the unreacted fuel from a topping solid oxide fuel cell is burnt in an afterburner to feed a bottoming gas turbine and produce additional power. Combustion gas expands in the gas turbine after having preheated the inlet air and fuel and it is used to generate steam required by the reforming reactions. A novel thermodynamic model has been developed for the fuel cell and implemented into the library of a modular object-oriented Process Simulator, CAMELPro™. The relevant plant performance indicators have been analyzed to evaluate the incremental increase in efficiency brought about by the introduction of the gas turbine and heat regeneration system. Simulations were performed for different values of the main plant parameters.

• This paper is an updated version of a paper published in the ECOS'08 proceedings. 

Keywords

solid oxide fuel cells, combined cycles, process modeling, numerical simulation

References

• Achenbach, E., 1994: Status of the IEA-benchmark test on stack-modelling, IEA Workshop, Roma, Italy.
• Achenbach, E., 1996, SOFC stack modeling, Final Report of Activity A2, Annex II: Modeling and Evaluation of Ad- vanced Solid Oxide Fuel Cells, IEA Programme on R,
• D&D on Advanced Fuel Cells, Juelich, Germany. Amati V., Sciubba E., Toro C., 2008, Exergy analysis of a solid oxide fuel cell-gas turbine hybrid power plant, ASME Paper IMECE2008-68339.
• Bohn D., Poppe N., Lepers J, 2002, Assessment of the po- tential of combined micro gas turbine and high temperature fuel cell systems, ASME Paper GT-2002-30112.
• Bustamante F., 2004, High-Temperature Kinetics of the Homogeneous Reverse Water–Gas Shift Reaction, AIChE Journal, Vol.. 50, No. 5, pp. 1028-1041.
• Campanari S., Iora P., 2004, Definition and sensitivity analysis of a finite volume SOFC model for a tubular cell geometry, J. Power Sources, Vol. 132, pp. 113–126.
• Campanari S., 2004, Parametric analysis of small scale re- cuperated SOFC/gas turbine cycles, ASME Paper GT2004
• Chan S.H., Ho H.K., Tian Y., 2002, Modelling of a simple hybrid solid oxide fuel cell-gas turbine power plant, J.
• Power Sources, Vol. 109, pp. 111–120. Colonna, P., van der Stelt, T. P., 2004, FluidProp a program for the estimation of thermophysical properties of fluids,
• Energy Technology Section, Delft University of Technolo- gy, The Netherlands. Costamagna P., Selimovic A., Del Borghi M., Agnew G., , Electrochemical model of the integrated planar solid oxide fuel cell (IP-SOFC), Chem. Eng. J., Vol. 102, pp. 61– Falcetta M., Sciubba E., 1995, A Computational Modular
• Approach to the Simulation of Power Plants , ASME-AES Heat Recovery Systems & CHP, Vol. 15, No. 2, pp. 131- Hirchenhofer J.H., 2000, Fuel Cell Handbook, Fifth Edi- tion, Person Corporation, Reading, PA 19607.
• Lanzafame, R, Messina, M, 2000, A novel interpolating polynomial for the calculation of gas enthalpy, La Termo- tecnica, (in Italian).
• Liese E.A., Gemmen R.S., 2003, Performance comparison of internal reforming against external reforming in a
• SOFC/gas turbine hybrid system, ASME Paper GT 2003
• Massardo A.F., Lubelli F., 2000, Internally Reforming Sol- id Oxide Fuel Cell - Gas Turbine Combined Cycles
• (IRSOFC-GT). Part A: Cell Model and Cycle Thermody- namic Analysis, J. Eng. Gas Turb. & Power, Vol. 122, pp. 35. Park S.K., Oh K.S., Kim T.S., 2007, Analysis of the design of a pressurised SOFC hybrid system using a fixed gas tur- bine design, J. Power Sources, Vol. 170, pp.130-139
• Rao A.D., Samuelsen G.S., 2002, Analysis strategies for tubular solid oxide fuel cell based hybrid systems, J. Eng.
• Gas Turb. & Power, Vol. 124, pp. 503–509 The International Association for the Properties of Water and Steam, 1997, Release on the IAPWS Industrial Formu- lation 1997 for the Thermodynamic Properties of Water and Steam, Erlangen, Germany.
• Van Herle J., Maréchal F., Leuenberger, S., Membrez, Y., Bucheli, O., Favrat, D., 2004, Process flow model of solid oxide fuel cell system supplied with sewage biogas, J.
• Power Sources, Vol. 131, pp.127–141. Williams G.J., Siddle A., Pointon K., 2001, Design optimi- sation of a hybrid solid oxide fuel cell & gas turbine power generation system, ALSTOM Power Techn. Centre TR,. www.turbomachinery.it, 2008, CAMEL-Pro™ Users Manual, rev. 4
• Xu, J., Froment, G.F., 1989, Methane steam reforming, methanation and water-gas shift: I. Intrinsic kinetics, AIChE Journal, Vol. 35, pp.88-96.
• Zhang, X., Li, J., Li, G., Feng, Z., 2007, Cycle analysis of an integrated solid oxide fuel cell and recuperative gas tur- bine with an air reheating system, J. Power Sources, Vol. , pp. 752–760.