Reheat combustion has been proven now in over to be a robust and highly flexible gas turbine concept for power generation. This paper covers three key topics to explain the intrinsic advantage of reheat combustion to achieve ultralow emission levels. First, the fundamental kinetic and thermodynamic emission advantage of reheat combustion is discussed, analyzing in detail the emission levels of the first and second combustor stages, optimal firing temperatures for minimal emission levels, as well as benchmarking against single-stage combustion concepts. Second, the generic operational and fuel flexibility of the reheat system is emphasized, which is based on the presence of two fundamentally different flame stabilization mechanisms, namely, flame propagation in the first combustor stage and autoignition in the second combustor stage. This is shown using simple reasoning on generic kinetic models. Finally, the present fleet status is reported by highlighting the latest combustor hardware upgrade and its emission performance.
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March 2009
Research Papers
The Reheat Concept: The Proven Pathway to Ultralow Emissions and High Efficiency and Flexibility
Jaan Hellat,
Jaan Hellat
Alstom
, Brown-Boveri-Strasse 7, CH-5400 Baden, Switzerland
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Peter Flohr
Peter Flohr
Alstom
, Brown-Boveri-Strasse 7, CH-5400 Baden, Switzerland
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Felix Güthe
Jaan Hellat
Alstom
, Brown-Boveri-Strasse 7, CH-5400 Baden, Switzerland
Peter Flohr
Alstom
, Brown-Boveri-Strasse 7, CH-5400 Baden, SwitzerlandJ. Eng. Gas Turbines Power. Mar 2009, 131(2): 021503 (7 pages)
Published Online: December 24, 2008
Article history
Received:
May 30, 2007
Revised:
October 8, 2007
Published:
December 24, 2008
Citation
Güthe, F., Hellat, J., and Flohr, P. (December 24, 2008). "The Reheat Concept: The Proven Pathway to Ultralow Emissions and High Efficiency and Flexibility." ASME. J. Eng. Gas Turbines Power. March 2009; 131(2): 021503. https://doi.org/10.1115/1.2836613
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