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AssigneeAnsaldo Energia Switzerland AG
InventorsEribert BENZ, Jaan Hellat, Hans Wettstein, Robin Payne
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What is described is a method for operating a gas turbine power plant, in which fresh air is delivered to a compressor inlet and is accelerated in the compressor inlet and a recirculated first exhaust gas substream is delivered into a region of the compressor inlet in which the fresh air is accelerated to an extent such that the difference between total pressure and static pressure in the fresh air is greater than or equal to a pressure difference which is required in order to suck a target mass flow of the recirculated first exhaust gas substream into the compressor inlet. What is described, further, is a gas turbine power plant with a gas turbine, the compressor inlet of which is divided into two sectors which the flow duct of the compressor adjoins, a feeder for fresh air being connected to the first sector and a recirculation line for recirculating the first exhaust gas substream being connected to the second sector, and the second sector reaching so close to the compressor that, when the gas turbine is in operation, the static pressure at the outlet of the second sector is so low that the difference between total pressure and static pressure is greater than or equal to a pressure difference which is required in order to suck a target mass flow of the recirculated first exhaust gas substream into the compressor inlet.
A method for operating a gas turbine power plant with exhaust gas recirculation, which comprises a gas turbine with a compressor inlet, a waste heat recovery steam generator, an exhaust gas divider which divides the exhaust gases into a first exhaust gas substream for recirculation into an intake stream of the gas turbine and into a second exhaust gas substream for discharge into the surroundings, and also a recirculation line and an exhaust gas recooler, said method comprising:
A gas turbine power plant, comprising a gas turbine, a waste heat recovery steam generator, a compressor inlet and an exhaust gas divider which, during operation, divides the exhaust gases into a first exhaust gas substream for recirculation into an intake stream of the gas turbine and into a second exhaust gas substream for discharge into the surroundings, wherein the compressor inlet is divided into a first sector and a second sector which the flow duct of the compressor adjoins, the first sector and the second sector being arranged coaxially to one another at their outlets, and a feeder for fresh air being connected to the first sector and a recirculation line for recirculating the first exhaust gas substream from the exhaust gas divider being connected to the second sector, and the second sector reaching so close to the compressor that, when the gas turbine is in operation, the static pressure at the outlet of the second sector is so low that the difference between total pressure and static pressure is greater than or equal to a pressure difference which is required in order to suck a target mass flow of the recirculated first exhaust gas substream into the compressor inlet.
The gas turbine power plant as claimed in 9, wherein the second sector of the compressor entry is connected to a feeder for fresh air via a control or regulating element.
Dependencies are inferred from the claim text.