Alstom Technology Limited

General Electric Technology Gmbh

Manfred Wirsum

Eribert Benz

Hans Wettstein

Peter Flohr

Franz Joos

Christoph Bernhard Ruchti

Felix Guethe

Jonas Hurter

Giovanni Cataldi

Hongtao Li

Francois Droux

Gijsbertus Oomens

Holger Gerhard Nagel

Celine Mahieux

Jurgen Hoffmann

Steffen Schulz

Jürgen Hoffmann

Christoph Ruchti

Juergen Hoffmann

Holger Nagel

Provided is a control method for a gas turbine plant having a first and a second combustors in series, such that combustion gases produced in the first combustor flows into the second combustor. The second combustor having a fuel lance with internal partitions, for injecting at least one fuel and a gas having a mixture of inert gas and support air into the second combustor. The partitions enable the gas to carry, and/or veil, at least one of the fuels as the fuel exits the lance. A variable of the second combustor is measured and the inert gas to support air mixture varies in response to variations of the variable so as to at least partially compensate for the operational effects of the variable on the operation of the second combustor.

Operation of a gas turbine

A gas turbine plant is provided with exhaust gas recirculation and includes a main gas turbine having a main compressor and main turbine driving a main generator, and a combustion chamber, with an outlet connected to the inlet of the main gas turbine, has a fuel feed, and via the recuperator's high-pressure side obtains combustion air from the main gas turbine's compressor outlet. The outlet of the main turbine and the inlet of the main compressor are connected via the recuperator's low-pressure side and a cooler for exhaust gas recirculation. On the recuperator's low-pressure side, a charging unit, with a compressor and a turbine is arranged, and draws in air via an air intake and by the outlet of its compressor is connected to the recuperator's low-pressure side outlet and by the inlet of its turbine is connected to a surplus-gas extraction line on the recuperator's low-pressure side.

Gas turbine plant with exhaust gas recirculation and also method for operating such a plant

A method is provided for operating a combined cycle power plant including a COcapture system and flue gas recirculation system. The method includes controlling a flue gas recirculation rate and a re-cooling temperature of the recirculated flue gases, depending on load, to optimize the overall plant efficiency including the COcapture system. Also provided is a combined cycle power plant including a COcapture system and flue gas recirculation system. The plant being configured to carry out a method in which a flue gas recirculation rate and a re-cooling temperature of recirculated flue gases is controlled depending on load to optimize the overall plant efficiency including the COcapture system.

[object Object]

In a method for operating a gas turbine () in a combined cycle power plant (), air, which is used to burn a syngas that is recovered from coal is drawn in by the gas turbine () and compressed, is led to a combustor (), and a portion of the compressed air is separated into oxygen and nitrogen. An improved degree of efficiency is achieved by virtue of the fact that a gas turbine () with reheating is used, which includes two combustors () and two turbines (), in which, in the first combustor () syngas is burned using compressed air, and the resultant hot gases are expanded and in which, in the second combustor, syngas is burned using the gases coming from the first turbine () and the resultant hot gases are expanded in the second turbine (), and that the nitrogen that occurs in the separation of the air is used to cool the gas turbine ().

Method for operating a gas turbine and a gas turbine for implementing the method

In a method for operating a gas turbine () in a combined cycle power plant (), air, which is used to burn a syngas that is recovered from coal, is drawn in and compressed by the gas turbine (), the compressed air is fed into a combustor () and such that a portion of the compressed air is separated into oxygen and nitrogen. An improved degree of efficiency is achieved by this method by virtue of the fact that a gas turbine () with reheating and two combustors () and two turbines () is used. In the first combustor (), syngas is burned using the compressed air, and the resultant hot gases are expanded in the first turbine (). In the second combustor, syngas is burned using the gases coming from the first turbine () and the resultant gases are expanded in the second turbine () such that the nitrogen that occurs in the separation of the air is led to the gas turbine () to be compressed.

Method for operating a gas turbine as well as a gas turbine for implementing the method

In a method for operating a gas turbine () in a combined cycle power plant (), air is drawn in through the gas turbine (), compressed, and the compressed air is led to a combustor () to burn a syngas that is recovered from coal, whereby a portion of the compressed air is separated into oxygen and nitrogen. An improved degree of efficiency is achieved by virtue of the fact that a gas turbine () with reheating is used, which includes two combustors () and two turbines (), whereby in the first combustor () syngas is burned with the compressed air and the resultant hot gases are expanded in the first turbine (). In the second combustor, syngas is burned with the gases coming from the first turbine () and the resultant hot gases are expanded in the second turbine () and the generation of the syngas is undertaken in such a manner that the syngas that is generated can be led directly to the first combustor ().

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Baden-Daettwil, Switzerland

Manfred Wirsum