Alstom Technology Limited

Asea Brown Boveri Ag

Ansaldo Energia Switzerland Ag

Dieter Rebhan

Marcel Stalder

Stefan Rofka

Thomas Zierer

Hans Peter Knoepfel

Jost Braun

Thomas Kueenzi

A gas turbine uses a first fuel at full load and an improved emission behavior is achieved by operating the gas turbine () at partial load with a second fuel, which has a richer mix of higher-value hydrocarbons (C2+) with 2 and more carbon atoms per molecule like ethane (CH) and propane (CH).

Gas turbine system for injecting a mixture of high value hydrocarbons plural distinct fuels into the gas turbine combustion chamber

A method for operating a gas turbine uses a first fuel at full load. An improved emission behavior is achieved by operating the gas turbine () at partial load with a second fuel, which has a richer mix of higher-value hydrocarbons (C2+) with 2 and more carbon atoms per molecule like ethane (CH) and propane (CH).

Method for operating a gas turbine and gas turbine system for carrying out the method

A method for running up a gas turbine plant ( ) is disclosed. In the method, a fuel ( ) is injected into the combustion chamber ( ) via a plurality of pilot burners ( ) and premix burners ( ). During the start-up and in a lower load range, the combustion chamber ( ) is operated in the pilot mode, and, at a specific time point, the combustion chamber ( ) is changed over from the pilot mode to the premix mode. The changeover time point from the pilot mode to the premix mode depends on a variable changeover temperature (T ), and this changeover temperature (T ) is determined from pulsations occurring in the flame of the combustion chamber ( ).

Method for running up a gas turbine plant

A turbomachine, in particular a gas turbine, is in the traditional manner provided with air cooling of the components that are subject to a high thermal stress. The cooling system (21, 31, 41) is provided with elements through which another medium (25, 35, 45), for example water or steam, can be added to the cooling system during peak demand. This medium displaces cooling air (26, 36, 46) from the cooling system, the air being then available additionally in a heat generator (2, 4). This means that more fuel (12, 13) can be added without increasing the hot gas temperature (T.sub.1, T.sub.3) at the turbine inlet (301, 501), and the power is increased. The quantity of the medium added to the cooling system is controlled by control elements (24, 34, 44) as a function of a control deviation (P.sub.set -P.sub.act) of the power.

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Albbruck, Germany

Dieter Rebhan