Alstom Technology Limited

General Electric Technology Gmbh

Hongtao Li

Holger Gerhard Nagel

Jürgen Gerhard Hoffmann

Christoph Bernhard Ruchti

Francois Droux

Celine Mahieux

Joerg Oesterheld

Manfred Wirsum

Paul Drouvot

Enrico Conte

Joerg Dietzmann

Camille Pedretti

Alexander Zagorskiy

François Droux

Karl Reyser

Jurgen Hoffmann

Tjiptady Nugroho

Kevin Chan

Tobias Kjellberg

Staffan Jönsson

Jörg Dietzmann

Jürgen Hoffmann

Christoph Ruchti

Juergen Hoffmann

A power plant system including a fossil fuel fired power plant () for the generation of electricity, a carbon dioxide capture and compression system (), and an external heat cycle system has at least one heat exchanger () for the heating of the flow medium of the external heat cycle system. The heat exchanger () is connected to a heat flow from the COcapture plant () or a COcompression unit (). A return flow from the heat exchanger () is led to the COcapture and compression system () or to the power plant (). The power plant system allows an increase in overall efficiency of the system.

Thermal integration of a carbon dioxide capture and compression unit with a steam or combined cycle plant

A fossil fuel fired power plant for the generation of electrical energy comprises a water steam cycle and a plant () for the capture of CO2 from exhaust gases emitted by the power plant and a steam jet ejector () configured and arranged to receive an input steam flow from a low- or intermediate pressure extraction point in the power plant and to increase its pressure. It is further arranged to receive motive steam () from a further extraction point in the power plant. A steam line () directs the steam of increased pressure from the steam jet ejector () to the CO2 capture plant (). The power plant according to this invention allows the use of low-pressure steam for the operation of the CO2 capture plant, where the extraction of such steam affects the overall efficiency of the power plant to a lesser degree than in power plant of the state of the art.

Power plant with CO2 capture and method to operate such power plant

The invention relates to a method for operating a thermal power plant, which includes a gas turbine and a generator driven directly by the gas turbine by means of a shaft and being connected to an electrical grid having a grid frequency (F) via an electronic decoupling apparatus and a step-up transformer. A synthetic inertia response is achieved by said method includes the steps of:

Method for operating a thermal power plant

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

COcompression is a main step in carbon capture and storage, which is essential to control global warming. COcompressors are powered by electric motors, which increase operational flexibility but require much energy leading to additional expenses, power and efficiency losses. A method is provided for optimized operation of a plant including a power generation unit with a COcapture system and compressor with minimum losses during normal operation, allowing flexible part load. The method allows steam from the power unit to drive a steam turbine, which drives the COcompressor via an engaged overrunning clutch if a sufficient amount of steam is available from the power unit, and to drive it by the generator, which is used as motor when insufficient steam is available from the power unit. When no or insufficient steam is available the clutch is disengaged and the steam turbine may be at standstill or idling.

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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.

A method is provided for operating a combined cycle power plant having at least one gas turbine, a heat recovery steam generator (HSRG), a steam turbine and a CO2 capture system. The method includes recirculating a first partial flow of flue gases from the HRSG. The method also includes capturing CO2 from a second partial flow of flue gases from the HRSG; and operating a supplementary firing to increase the net power output of the plant and to at least partly compensate the power consumption of the CO2 capture system. A combined cycle power plant is also provided. The plant includes at least one gas turbine, at least one heat recovery steam generator, at least one steam turbine at least one COcapture system, and flue gas recirculation. The plant also includes a low excess air supplementary firing.

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Aarau, Switzerland

Hongtao Li