Development of controls for dynamic operation of carbonate fuel cell-gas turbine hybrid systems

Hybrid fuel cell/gas turbine (FC/GT) systems have been shown through experiment and simulation to be highly efficient technologies with low emissions. Maintaining efficient, low emission, and safe operation, whether during disturbances or regular operational transients, is a challenge to both understand and address. Some likely disturbances can arise from changes in ambient temperature, fuel flow variations induced by supply pressure disturbances, fuel composition variability, and power demand fluctuations. To gain insight into the dynamic operation of such cycles and address operating challenges, dynamic modeling tools have been developed at two different laboratories. In this paper these models are used to simulate the dynamic operation of an integrated MCFC/GT hybrid system and to subsequently develop and test control strategies for the hybrid power plant. Two control strategies are developed and tested for their ability to control the system during various perturbations. Predicted fuel cell operating temperature, fuel utilization, fuel cell and GT power, shaft speed, compressor mass flow and temperatures throughout the FC/GT system are presented for the controlled response to a fuel cell voltage increase in order to show the effect of a load decrease.Copyright © 2005 by ASME

[1]  Faryar Jabbari,et al.  Technical Development Issues and Dynamic Modeling of Gas Turbine and Fuel Cell Hybrid Systems , 1999 .

[2]  Paola Costamagna,et al.  Electrochemical model of the integrated planar solid oxide fuel cell (IP-SOFC) , 2004 .

[3]  Aristide F. Massardo,et al.  Internal Reforming Solid Oxide Fuel Cell-Gas Turbine Combined Cycles (IRSOFC-GT): Part A—Cell Model and Cycle Thermodynamic Analysis , 2000 .

[4]  Wayne L. Lundberg,et al.  Tubular SOFC Hybrid Power System Status , 2003 .

[5]  Faryar Jabbari,et al.  Inter-Laboratory Dynamic Modeling of a Carbonate Fuel Cell for Hybrid Application , 2003 .

[6]  Kwang Y. Lee,et al.  Development of a stack simulation model for control study on direct reforming molten carbonate fuel cell power plant , 1999 .

[7]  Loredana Magistri,et al.  Transient Analysis of Solid Oxide Fuel Cell Hybrids: Part A — Fuel Cell Models , 2004 .

[8]  K.Y. Lee,et al.  Operation and control of direct reforming fuel cell power plant , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).

[9]  Thomas P. Smith,et al.  Simulation of a 220 kW hybrid SOFC gas turbine system and data comparison , 2003 .

[10]  G. S. Samuelsen,et al.  Analysis Strategies for Tubular Solid Oxide Fuel Cell Based Hybrid Systems , 2002 .

[11]  Paola Costamagna,et al.  Design and part-load performance of a hybrid system based on a solid oxide fuel cell reactor and a micro gas turbine , 2001 .

[12]  Jack Brouwer,et al.  Dynamic simulation of carbonate fuel cell-gas turbine hybrid systems , 2006 .

[13]  Hossein Ghezel-Ayagh,et al.  Advances in Direct Fuel Cell/Gas Turbine Power Plants , 2003 .

[14]  Faryar Jabbari,et al.  Development of Dynamic Modeling Tools for Solid Oxide and Molten Carbonate Hybrid Fuel Cell Gas Turbine Systems , 2000 .