GAS TURBINE COOL-DOWN PHASE OPERATION METHODS

The application describes a method of operating a gas turbine (1) during a cool-down phase. The gas turbine (1) provides a compressor (2), a combustor (4) downstream of the compressor (2), and a turbine (6) downstream of the combustor (4), with the turbine (6) providing a turbine vane carrier (50)....

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Bibliographische Detailangaben
Hauptverfasser:	Robson, Christopher Michael, Cataldi, Giovanni, Pathak, Gaurav, Rueter, Andreas, Filkorn, Guenter
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES STEAM ENGINES WEAPONS
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Beschreibung
Zusammenfassung:	The application describes a method of operating a gas turbine (1) during a cool-down phase. The gas turbine (1) provides a compressor (2), a combustor (4) downstream of the compressor (2), and a turbine (6) downstream of the combustor (4), with the turbine (6) providing a turbine vane carrier (50). The method comprises the steps of feeding a flow of cooling air (10, 20, 30) from the compressor (2) to the turbine vane carrier (50), measuring a temperature of the flow of cooling air (10, 20, 30) and measuring a temperature of the turbine vane carrier (50). In the method, the flow of cooling air (10, 20, 30) is fed at a first flow rate when the temperature of the turbine vane carrier (50) is lower than the temperature of the cooling air (10, 20, 30), and the flow of cooling air (10, 20, 30) is fed at a second flow rate when the temperature of the turbine vane carrier (50) is higher than the temperature of the cooling air (10, 20, 30), wherein the first flow rate is higher than the second flow rate. Various embodiments of the method and the gas turbine are also described.