Safe Dynamic Operation of a Simple SOFC/GT Hybrid System

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 behaviour 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 app. 25% part-load is proposed and the dynamic behaviour 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.Copyright © 2005 by ASME

[1]  R. Reid,et al.  The Properties of Gases and Liquids , 1977 .

[2]  Shinji Kimijima,et al.  PERFORMANCE EVALUATION OF GAS TURBINE-FUEL CELL HYBRID MICRO GENERATION SYSTEM , 2002 .

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

[4]  A. D. Rao,et al.  A Thermodynamic Analysis of Tubular SOFC Based Hybrid Systems , 2001 .

[5]  Christoph Stiller,et al.  Part-load and load change simulation of tubular SOFC systems , 2004 .

[6]  Stefano Campanari,et al.  Full Load and Part-Load Performance Prediction for Integrated SOFC and Microturbine Systems , 1999 .

[7]  Olav Bolland,et al.  Finite-volume modeling and hybrid-cycle performance of planar and tubular solid oxide fuel cells , 2005 .

[8]  Aristide F. Massardo,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 .

[9]  Wtw Cory,et al.  2 – The properties of gases , 2005 .

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

[11]  Y. Tian,et al.  Modelling for part-load operation of solid oxide fuel cell–gas turbine hybrid power plant , 2003 .

[12]  Tong Seop Kim,et al.  Parametric Studies for a Performance Analysis of a SOFC/MGT Hybrid Power System Based on a Quasi-2D Model , 2004 .

[13]  E. Achenbach.  Response of a solid oxide fuel cell to load change , 1995 .

[14]  Azra Selimovic,et al.  Design and Off-Design Predictions of a Combined SOFC and Gas Turbine System , 2001 .

[15]  Loredana Magistri,et al.  Ejector performance influence on a solid oxide fuel cell anodic recirculation system , 2004 .

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

[17]  Lars Sjunnesson,et al.  Combined solid oxide fuel cell and gas turbine systems for efficient power and heat generation , 2000 .

[18]  E. Riensche,et al.  Methane/steam reforming kinetics for solid oxide fuel cells , 1994 .