Development Potential of Combined-Cycle (GUD) Power Plants With and Without Supplementary Firing

[+] Author and Article Information
H. H. Finckh

Gas Turbine and Combine Cycle Technology, Siemens AG, KWU Group, Erlangen, Federal Republic of Germany

H. Pfost

Institute of Energy Technology, Ruhr-University, Bochum, Federal Republic of Germany

J. Eng. Gas Turbines Power 114(4), 653-659 (Oct 01, 1992) (7 pages) doi:10.1115/1.2906638 History: Received March 04, 1991; Online April 24, 2008


Unfired combined cycles achieve superior efficiencies at low emission levels. The potential and efficiency limits are investigated and the possibilities for enhancing efficiency are described. It is demonstrated that limited supplementary firing of the heat recovery steam generator can be an interesting alternative and that this allows efficiency and plant size to be increased. The effects of supplementary firing on NOx emissions are also shown.

Copyright © 1992 by The American Society of Mechanical Engineers
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