This is the second paper exploring the effects of the degradation of different components on combined cycle gas turbine (CCGT) plant performance. This paper investigates the effects of degraded steam path components of steam turbine (bottoming) cycle have on CCGT power plant performance. Areas looked at were, steam turbine fouling, steam turbine erosion, heat recovery steam generator degradation (scaling and/or ashes deposition), and condenser degradation. The effect of gas turbine back-pressure on plant performance due to HRSG degradation is also discussed. A general simulation FORTRAN code was developed for the purpose of this study. This program can calculate the CCGT plant design point performance, off-design plant performance, and plant deterioration performance. The results obtained are presented in a graphical form and discussed.

Issue Section:
Gas Turbines: Cycle Innovations
Keywords:
steam turbines, steam power stations, combined cycle power stations, power system faults, power system economics, pressure, engineering computing
Topics:
Cycles, Gas turbines, Pressure, Steam, Steam turbines, Heat recovery steam generators, Erosion, Simulation
1.
Saunders, E. A. D., 1988, Heat Exchangers: Selection, Design and Construction, Longman Group UK Limited, London.
2.
Von Nostrand, W. L., et al., 1981, Fouling of Heat Transfer Equipment, Hemisphere, Washington, DC.
3.
Seikan Ishigia, 1999, Steam Power Engineering: Thermal and Hydraulic Design Principles, Cambridge University Press, Cambridge, UK.
4.
Zwebek, A. I., and Pilidis, P., 2001, “Degradation Effects on Combined Cycle Power Plant Performance, Part 1: Gas Turbine Cycle Component Degradation Effects,” ASME Paper No. 2001-GT-388.
5.
Li, Kam W., Priddy, and A. Paul, 1985, Power Plant System Design, John Wiley and Sons, New York.
6.
Sanders, P. William, 1986, Turbine Steam Path Performance, Turbomachinery International Publications: Monograph Series, Series No. S.1.
Copyright © 2003
 by ASME
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