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.

Issue Section:
Research Papers
Topics:
Combined cycles, Firing, Power stations, Emissions, Heat recovery steam generators, Nitrogen oxides
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Copyright © 1992
 by The American Society of Mechanical Engineers
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