The purpose of the current work is to analyze and also to verify the operating behavior of a solid oxide fuel cell/gas turbine (GT) hybrid system in order to derive necessary requirements for an appropriate control system. The studies are carried out with a control oriented simplified dynamic model of a hybrid system based on a conceptual design previously presented in literature. As a specific feature additional firing of the GT combustor is investigated. First the design point is defined. Then the off-design performance is presented in terms of characteristic performance maps. Based on operating map investigations an appropriate part-load operating curve is defined with considerations given to constraints (e.g., stack temperature or surge margin), efficiency, and operational flexibility. The load range goes from 40% part-load to 105% overload. To investigate the transient behavior five open loop simulations are carried out changing different model inputs, as well as all model inputs applying a 30% load change according to the operating curve. The simulated behavior reveals that the inputs should be changed with specific care to avoid critical situations during load change.
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e-mail: waechter@hsu-hh.de
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Steady State Off-Design and Transient Behavior of a Solid Oxide Fuel Cell/Gas Turbine Hybrid Power Plant With Additional Firing of the Gas Turbine Combustor
Christian Wächter,
Christian Wächter
Power Engineering Laboratory of Turbomachinery,
e-mail: waechter@hsu-hh.de
Helmut-Schmidt-University (University of the Federal Armed Forces Hamburg)
, Holstenhofweg 85, D-22043 Hamburg, Germany
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Franz Joos
Franz Joos
Power Engineering Laboratory of Turbomachinery,
e-mail: joos@hsu-hh.de
Helmut-Schmidt-University (University of the Federal Armed Forces Hamburg)
, Holstenhofweg 85, D-22043 Hamburg, Germany
Search for other works by this author on:
Christian Wächter
Power Engineering Laboratory of Turbomachinery,
Helmut-Schmidt-University (University of the Federal Armed Forces Hamburg)
, Holstenhofweg 85, D-22043 Hamburg, Germanye-mail: waechter@hsu-hh.de
Franz Joos
Power Engineering Laboratory of Turbomachinery,
Helmut-Schmidt-University (University of the Federal Armed Forces Hamburg)
, Holstenhofweg 85, D-22043 Hamburg, Germanye-mail: joos@hsu-hh.de
J. Eng. Gas Turbines Power. May 2009, 131(3): 031701 (9 pages)
Published Online: January 29, 2009
Article history
Received:
March 28, 2008
Revised:
May 18, 2008
Published:
January 29, 2009
Citation
Wächter, C., and Joos, F. (January 29, 2009). "Steady State Off-Design and Transient Behavior of a Solid Oxide Fuel Cell/Gas Turbine Hybrid Power Plant With Additional Firing of the Gas Turbine Combustor." ASME. J. Eng. Gas Turbines Power. May 2009; 131(3): 031701. https://doi.org/10.1115/1.2981176
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