Abstract: A power plant is provided including a steam power plant and/or a combined cycle power plant. A water steam cycle of the plant includes two steam turbine arrangements; the first turbine arrangement includes steam turbines with at least two pressure levels and a second turbine arrangement having at least one back pressure turbine configured to expand steam to the supply pressure of a CO2 capture system. A method for operating the plant includes operating the first steam turbine arrangement to produce power during all steady state operating points of the steam cycle and at least a part of the second steam turbine arrangement is bypassed to the system and/or is operated to produce power and to release low-pressure steam to the system when the system is in operation. Both steam turbine arrangements are operated using all available steam to produce power when the system is not in operation.

Abstract: An exemplary fossil fuel fired power plant is disclosed with minimum impact of the CO2 capture system on a power part of the plant. A power plant is disclosed which is ready for the retrofit of a CO2 capture plant, and a method is disclosed for retrofitting an existing plant into a power plant with CO2 capture. A power plant part is disclosed which can provide steam and power to operate CO2 capture system, and provide a CO2 capture system, which has the capacity to remove CO2 from flue gas flow of the power part, and of the additional power plant part.

Abstract: 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 CO2 capture system, and flue gas recirculation. The plant also includes a low excess air supplementary firing.

Abstract: A method is provided for operating a combined cycle power plant including a CO2 capture 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 CO2 capture system. Also provided is a combined cycle power plant including a CO2 capture 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 CO2 capture system.

Abstract: CO2 compression is a main step in carbon capture and storage, which is essential to control global warming. CO2 compressors 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 CO2 capture 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 CO2 compressor 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.

Abstract: A power plant system including a fossil fuel fired power plant (6) for the generation of electricity, a carbon dioxide capture and compression system (5, 13), and an external heat cycle system has at least one heat exchanger (1,2,3) for the heating of the flow medium of the external heat cycle system. The heat exchanger (1,2,3) is connected to a heat flow from the CO2 capture plant (5) or a CO2 compression unit (13). A return flow from the heat exchanger (1,2,3) is led to the CO2 capture and compression system (5,13) or to the power plant (6). The power plant system allows an increase in overall efficiency of the system.

Abstract: A mask layout is disclosed. The mask layout includes a mask body, a mask pattern disposed on a surface of the mask body, and a cover disposed on the mask body. Preferably, the mask body and the cover include a medium therebetween and the cover includes no filter.