Abstract: Systems and methods are provided for varying the exhaust gas recycle circuit of low emission gas turbines. In one or more embodiments, the systems and methods incorporate alternatives to the use of a direct contact cooler. In the same or other embodiments, the systems and methods incorporate alternatives intended to reduce or eliminate the erosion or corrosion of compressor blades due to the presence of acidic water droplets in the recycled gas stream.

Abstract: Systems, methods, and apparatus are provided for controlling the oxidant feed in low emission turbine systems to maintain stoichiometric or substantially stoichiometric combustion conditions. In one or more embodiments, such control is achieved by diverting a portion of the recirculating exhaust gas and combining it with the oxidant feed to maintain a constant oxygen level in the combined oxidant-exhaust stream fed to the combustion chamber.

Abstract: Systems, methods, and apparatus are provided for generating power in low emission turbine systems and separating the exhaust into rich CO2 and lean CO2 streams. In one or more embodiments, the exhaust is separated at an elevated pressure, such as between a high-pressure expansion stage and a low-pressure expansion stage.

Abstract: This disclosure is directed to a novel arrangement for equipment used to compress fluids. A single prime mover is connected to a plurality of compressors. A supply conduit with parallel branch conduits directs fluid to be compressed to at least two compressors and parallel output conduits from each compressor are connected to a common output conduit, which directs compressed fluids to at least one additional compressor.

Abstract: Integrated systems and methods for low emission power generation in a hydrocarbon recovery processes are provided. One system includes a control fuel stream, an oxygen stream, a combustion unit, a first power generate on system and a second power generation system. The combustion unit is configured to receive and combust the control fuel stream and the oxygen stream to produce a gaseous combustion stream having carbon dioxide and water. The first power generation system is configured to generate at least one unit of power and a carbon dioxide stream. The second power generation system is configured to receive thermal energy from the gaseous combustion stream and convert the thermal energy into at least one unit of power.

Abstract: Systems, methods, and apparatus are provided for generating power in combined low emission turbine systems and capturing and recovering carbon dioxide from the exhaust. In one or more embodiments, the exhaust from multiple turbine systems is combined, cooled, compressed, and separated to yield a carbon dioxide-containing effluent stream and a nitrogen-containing product stream. Portions of the recycled exhaust streams and the product streams may be used as diluents to regulate combustion in each combustor of the turbine systems.

Abstract: Systems and methods are provided for varying the exhaust gas recycle circuit of low emission gas turbines. In one or more embodiments, the systems and methods incorporate alternatives to the use of a direct contact cooler. In the same or other embodiments, the systems and methods incorporate alternatives intended to reduce or eliminate the erosion or corrosion of compressor blades due to the presence of acidic water droplets in the recycled gas stream.

Abstract: Systems, methods, and apparatus are provided for generating power in low emission turbine systems and separating the exhaust into rich CO2 and lean CO2 streams. In one or more embodiments, the exhaust is separated at an elevated pressure, such as between a high-pressure expansion stage and a low-pressure expansion stage.

Abstract: A strainer for removing debris from a fluid stream. The strainer includes a protective element, wherein the protective element comprises a flexible net configured to trap solids carried in a fluid stream, and a mount to hold the protective element within the fluid stream.

Abstract: Systems, methods, and apparatus are provided for controlling the oxidant feed in low emission turbine systems to maintain stoichiometric or substantially stoichiometric combustion conditions. In one or more embodiments, such control is achieved by diverting a portion of the recirculating exhaust gas and combining it with the oxidant feed to maintain a constant oxygen level in the combined oxidant-exhaust stream fed to the combustion chamber.

Abstract: Systems, methods, and apparatus are provided for controlling the oxidant feed in low emission turbine systems to maintain stoichiometric or substantially stoichiometric combustion conditions. In one or more embodiments, such control is achieved through methods or systems that ensure delivery of a consistent mass flow rate of oxidant to the combustion chamber.

Abstract: A method for in situ heating of a subsurface formation is provided. The method includes receiving hydrocarbon fluids produced from the subsurface formation as a result of heating. The method also includes processing the produced fluids to generate a hydrocarbon stream. A portion of the hydrocarbon stream is then delivered to a combustor along with an oxygen-containing stream as a combustion mixture. A diluent gas stream may also be provided for cooling. The mixture is then combusted to generate electricity, and to release an exhaust stream comprising carbon dioxide. The method also includes using at least a portion of the exhaust gas stream generated from the combustion for injection or for sequestration, thereby minimizing atmospheric release. In addition, at least a portion of the electrical power is delivered to a plurality of electrically resistive heating elements to deliver heat to the subsurface formation. A low emission power generation system is also provided.

Abstract: This disclosure is directed to a novel arrangement for equipment used to compress fluids. A single prime mover is connected to a plurality of compressors. A supply conduit with parallel branch conduits directs fluid to be compressed to at least two compressors and parallel output conduits from each compressor are connected to a common output conduit, which directs compressed fluids to at least one additional compressor.

Abstract: Integrated systems and methods for low emission power generation in a hydrocarbon recovery processes are provided. One system includes a control fuel stream, an oxygen stream, a combustion unit, a first power generate on system and a second power generation system. The combustion unit is configured to receive and combust the control fuel stream and the oxygen stream to produce a gaseous combustion stream having carbon dioxide and water. The first power generation system is configured to generate at least one unit of power and a carbon dioxide stream. The second power generation system is configured to receive thermal energy from the gaseous combustion stream and convert the thermal energy into at least one unit of power.