Bbc Brown, Boveri & Company, Limited

Alstom Technology Limited

Abb Stal Ab

General Electric Technology Gmbh

Dilip Mukherjee

Wilhelm Endres

Leif Kemmer

Goran Tjellander

A gas turbine (), in particular in a power plant, has at least one combustion chamber () and an enclosed inner liner () which surrounds the combustion chamber () and an enclosed outer liner (), having a stator () which has at least one vane row () with a plurality of vanes (), a rotor () which has at least one blade row () with a plurality of blades (), an air cooling arrangement () which is designed for cooling parts of the gas turbine () with air (L), and a steam cooling arrangement () which is designed for cooling parts of the gas turbine () with steam (D).

Gas turbine and associated cooling method

Method and device for temperature control in a combustion plant

The pressure-fired fluidized-bed boiler installation with a gas turbine set driven by the flue gases has, in the main air duct (8), a preheating burner (10) which heats the still cold fluidized-bed boiler (1) and a part of the flue gas duct (12) to a temperature above the dew point. Air branched off from the main air duct (8) is heated in a heat exchanger (20) and used for heating up the turbine (5) driven by the motor (6) and the remaining parts of the installation, through which flue gas flows.

Pressure-fired fluidized-bed boiler installation

In order to operate a gas turbine and steam turbine plant with a high temperature at the inlet to the gas turbine plant, the parts located in the hot-gas stream of the gas turbine being steam-cooled, and the cooling steam, thereby raised to a higher temperature, being fed to the steam turbine for further expansion, it is proposed that the waste heat from the gas turbine (3) be led through a two-pressure waste heat boiler (7), and that the steam, generated in this boiler, be slightly superheated in a cooling-steam superheater (10), and fed to the hollow inlet vanes (43) and to the rotor blades (42), which are likewise hollow, the steam, strongly superheated during this cooling process, then being admixed to the steam coming from the intermediate superheater (13), and being fed to the low-pressure section of the steam turbine (27).

Combined gas turbine and steam turbine power station

To improve wall cooling, especially at gas turbine elements, such as buckets or blading, combustion chambers, infeed channels and so forth, it is proposed to arrange a partition wall between an outer plate and an inner plate, for instance formed of sheet metal. The partition wall forms a cooling agent chamber and a pressure equalization chamber. The partition wall preferably consists of a buckle plate whose bulges or protuberances are connected, as by welding, with the outer plate. There is maintained within the pressure equalization chamber a pressure which approximately corresponds to the hot gas pressure at the outer surface of the outer plate, so that there are avoided so-called boiler stresses.

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Fislisbach, Switzerland

Dilip Mukherjee