Alstom Technology Limited

Ansaldo Energia Switzerland Ag

Ansaldo Energia IP UK Limited

Andreas Rueter

Klaus Doebbeling

Stefan Rofka

Giovanni Cataldi

Anton Nemet

Klaus Döbbeling

Christopher Michael Robson

Gaurav Pathak

Guenter Filkorn

Darrel Shayne Lilley

Martin Nicklas

Christof Pfeiffer

The application describes a method of operating a gas turbine during a cool-down phase. The gas turbine provides a compressor, a combustor downstream of the compressor, and a turbine downstream of the combustor, with the turbine providing a turbine vane carrier. The method includes feeding a flow of cooling air from the compressor to the turbine vane carrier, measuring a temperature of the flow of cooling air and measuring a temperature of the turbine vane carrier. In the method, the flow of cooling air is fed at a first flow rate when the temperature of the turbine vane carrier is lower than the temperature of the cooling air, and the flow of cooling air is fed at a second flow rate when the temperature of the turbine vane carrier is higher than the temperature of the cooling air, wherein the first flow rate is higher than the second flow rate.

Gas turbine cool-down phase operation methods for controlling turbine clearance by adjusting air flow rate

A method and apparatus for the operation of a gas turbine unit with an evaporative intake air cooling system in the intake air pathway, wherein the return water flow of the evaporative intake air cooling system is used for the cooling of components of the gas turbine unit and/or of a generator coupled to the gas turbine unit and/or of another element coupled to the gas turbine unit, and a gas turbine unit adapted to be operated using this method.

Using return water of an evaporative intake air cooling system for cooling a component of a gas turbine

With a method for controlling a gas turbine in a power plant, a multiplicity of operating lines for the gas turbine for different gas turbine inlet temperatures TIT or gas turbine exhaust temperatures TAT and positions of the compressor inlet guide vane cascade VIGV are specified as a function of the load. For minimizing the electricity production costs during operation switching can be optionally carried out between different operating lines during constant or varying power output of the power plant.

Method for controlling a gas turbine in a power plant and power plant for carrying out the method

The invention relates to a method for determination of a temperature, mass-averaged over a flow cross-section, of a gas flow in a gas turbine or the like, particularly during partial load operation of the gas turbine. The invention also relates to a control apparatus, which can be operated using the method according to the invention, for controlling a gas turbine installation. The method according to the invention comprising the steps of the temperature value of the gas flow being detected by a sensor or sensors at at least one position in the gas flow in the area of the flow cross-section, of determination of a correction value for correction of the temperature value for compensation for non-uniformities in the temperature profile of the gas flow across the flow cross-section as a function of at least one operating-point-specific parameter, and of correcting the temperature value, which is recorded by a sensor or sensors, by the correction value.

Method for determination of the temperature, mass-averaged over a flow cross-section, of a gas flow in a gas turbine

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Nussbaumen, Switzerland

Andreas Rueter