| 摘要 |
A low carbon emissions combined cycle power plant utilises vortex nozzles (38) operative at cryogenic temperatures to separate out carbon dioxide (39) from the flue gases. Complexity of the plant is minimised by operating a gas turbine engine component (10) of the plant at a turbine exhaust pressure of at least 2 bar, so that downstream components of the plant, comprising a heat recovery steam generator (19A), a gas cooling system (30, 33, 36), and the inlets of the vortex nozzles all operate at the same pressure of at least two bar. To increase carbon dioxide concentration in the flue gases (37) that pass through the vortex nozzles (38), and thereby increase efficiency of carbon dioxide removal from the flue gases, up to 50% of the flue gases that exit the heat recovery steam generator (19A) may be recirculated to a location (L, Fig. 4 )) in the compressor of the gas turbine engine where the pressure of the compressor air matches the flue gas pressure. |
