Alstom Technology Limited

General Electric Technology Gmbh

General Electric Company

Francois Droux

Christoph Bernhard Ruchti

Stefan Rofka

Hongtao Li

Dario Ugo Breschi

Karl Reyser

Johannes Wick

Raub Warfield Smith

Jürgen Gerhard Hoffmann

Wesley Paul Bauver, Ii

Charles Michael Jones

Donald William Bairley

Gijsbertus Oomens

Manfred Wirsum

Ian J Perrin

Holger Gerhard Nagel

Celine Mahieux

Robert John Gdaniec

Glenn T Selby

Alexander Zagorskiy

Falk Ruecker

Jurgen Hoffmann

Alan C Hazelton

Tobias Kjellberg

Jürgen Hoffmann

Christoph Ruchti

Ian James Perrin

Wesley Paul Bauver

Ii Wesley P Bauver

The present application provides an energy control computing device for adjusting one or more steam flow parameters delivered to a steam turbine from a heat recovery steam generator via a number of control devices. The energy control computing device includes a processor in communication with a memory. The processor is programmed to receive a number of measured operating values, identify steam turbine operating limits, identify a number of candidate operating modes meeting steam turbine operating limits, selecting the candidate operating mode maximizing the steam flow parameters while not exceeding the steam turbine operating limits, and directing the control devices to meet the selected candidate operating mode.

System and method to improve combined cycle plant power generation capacity via heat recovery energy control

The invention relates to a method for operation of a combined-cycle power plant with cogeneration, in which method combustion air is inducted in at least one gas turbine, and in which method the exhaust gas emerging from the at least one turbine is passed through a heat recovery steam generator (HRSG) in order to generate steam. The electricity production can be decoupled from the steam production in order to restrict the electricity production while the heat provided by steam extraction remains at a constant level. A portion of the inducted combustion air can be passed through at least one turbine to the HRSG without being involved in the combustion of the fuel in the gas turbine. This portion of the combustion air can be used to operate at least one supplementary firing in the heat recovery steam generator.

Method for operating a combined-cycle power plant with cogeneration, and a combined-cycle power plant for carrying out the method

A heat recovery steam generator that includes a first steam drum for receiving a flow of water and steam from an evaporator. The first steam drum is adapted to provide the flow of water and steam to a second steam drum. The second steam drum is in fluid communication with the first steam drum and receives the flow of water and steam from the first steam drum and separates steam from the flow of water and steam to form a separated steam. There is a steam flow outlet positioned in the second steam drum, the steam flow outlet adapted to release the separated steam from the second steam drum.

Method and configuration to reduce fatigue in steam drums

A power plant includes a first gas turbine engine, a second gas turbine engine, a flue gas duct, a COcapture system for treating flue gases from the second gas turbine engine and an exhaust system. It additionally includes at least one among a direct connection between the first gas turbine engine and the exhaust system, and a damper for on-line regulating the flue gases flow through it, a direct connection between the first gas turbine engine and the COcapture system, and a damper for regulating the flue gases flow through it, a supply of fresh oxygen containing fluid for the second gas turbine engine.

Power plant and method for retrofit

The invention relates to a method for operation of a combined-cycle power plant with cogeneration, in which method combustion air is inducted in at least one gas turbine, is compressed and is supplied to at least one combustion chamber for combustion of a fuel, and the resultant exhaust gas is expanded in at least one turbine, producing work, and in which method the exhaust gas emerging from the at least one turbine is passed through a heat recovery steam generator in order to generate steam, which generator is part of a water-steam circuit with at least one steam turbine, a condenser, a feedwater tank and a feedwater pump, wherein heat is provided by extracting steam from the at least one steam turbine. In a method such as this, the electricity production is decoupled from the steam production in that in order to restrict the electricity production while the heat provided by means of steam extraction remains at a constant level, a portion of the inducted combustion air is passed through the at least one turbine to the heat recovery steam generator without being involved in the combustion of the fuel in the gas turbine, and in that this portion of the combustion air is used to operate at least one supplementary firing in the heat recovery steam generator.

A method involves operating a combined-cycle power plant (), which has a gas turbine () with a compressor () and a turbine (), a heat recovery steam generator () which is connected downstream to the gas turbine () and is for producing steam in a water/steam cycle, and also at least one once-through cooler (), through which flows compressed air which is compressed in the compressor () and intended for cooling the gas turbine (), and, cooling down, converts feed-water () which is fed from the heat recovery steam generator () into steam, and discharges the steam to the heat recovery steam generator (). The combined-cycle power plant is switched between a first operating mode, in which only the gas turbine cycle is used for power generation, and a second operating mode, in which the gas turbine cycle and the water/steam cycle are used for power generation.

Combined-cycle power plant having a once-through cooler

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.

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Oberrohrdorf, Switzerland

Francois Droux