Patent ID: 8726628

Claim:
A combined cycle power plant comprising: a compressor section including a compressor inlet and a compressor outlet; a turbine section operatively connected to the compressor section, the turbine section including a turbine inlet and a turbine outlet; a heat recovery steam generator (HRSG) fluidly connected to the turbine outlet; a combustor including a head end and a combustor discharge, the head end being fluidly connected to the compressor outlet and the combustor discharge being fluidly connected to the turbine inlet; a carbon dioxide collection system fluidly connected to at least one of the compressor outlet and the head end of the combustor, the carbon dioxide collection system being configured and disposed to extract a first fluid comprising carbon dioxide and a second fluid from a substantially oxygen free fluid flow passed from the at least one of the compressor outlet and the head end of the combustor; and a secondary flow system directly fluidically connecting the compressor portion and the turbine portion, the secondary flow system delivering a substantially oxygen free cooling flow from the compressor portion to the turbine portion; an exhaust gas recirculation (EGR) system fluidically connected between the HRSG and the compressor section; a heat exchange member fluidically connected between one of the compressor outlet and the head end of the combustor and the carbon dioxide collection system; a throttling and control valve fluidically arranged between the one of the compressor outlet and the head end of the combustor and the heat exchange member, the throttling and control valve being configured and disposed to fluidically isolate the heat exchange member from the one of the compressor outlet and the head end of the combustor; and a turbine bypass valve fluidically connected to the HRSG configured and disposed to open when the throttling and control valve is closed to substantially prevent an over pressure condition in the EGR system.