SYSTEM AND PROCESS FOR ACTIVE DRAFT CONTROL OF POWER PLANT

A combined cycle power plant CCPP includes one turbomachine and heat recovery steam generator HRSG that is shutdown (or offline) and a second turbomachine and heat recovery steam generator HRSG that is online. The HRSG supplied duct dampers can provide sealing air therein to ensure no back flow from...

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Bibliographische Detailangaben
Hauptverfasser:	BEAUFRERE, Pierre, FREDERICK, Garth Curtis
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL ENGINE PLANTS NOT OTHERWISE PROVIDED FOR ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ACCUMULATORS STEAM ENGINE PLANTS STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	A combined cycle power plant CCPP includes one turbomachine and heat recovery steam generator HRSG that is shutdown (or offline) and a second turbomachine and heat recovery steam generator HRSG that is online. The HRSG supplied duct dampers can provide sealing air therein to ensure no back flow from the online turbomachine to the shutdown turbomachine of the plant. However, as cooling flow is desired, a controlled flow may be implemented to allow cooling flow to the shutdown turbomachine. This solution is valuable to cool CCPP configurations with multiple (e.g., 2) HRSGs discharging into a common exhaust stack without individual flues dedicated to each HRSG, regardless of turbomachine configuration.