Diagnostics of Combined Cycle Power Plants: Real Applications to Condition Based Maintenance (Kombinált ciklusú eromu diagnosztika: Állapot függo karbantartás alkalmazása)

The authors present a study oriented on demonstrating how power plant diagnostics could be used in approaching condition based maintenance of several components of combined cycle power plants. In this paper two different performance parameters are considered: gas turbine performance and condenser performance. Gas turbine performance is evaluated through the correction of compressor pressure ratio and of gas turbine power, while condenser performance is evaluated through the calculation of the so-called terminal temperature difference.After the description of the methodologies, a business case for both of them is presented, in order to show in terms of money savings the advantages of such analysis.