A power production system includes a flue gas generator configured to generate a flue gas that includes carbon dioxide and oxygen; a fuel supply; a fuel cell assembly that includes: a cathode section configured to receive the flue gas generated by the flue gas generator, and output cathode exhaust, and an anode section configured to receive fuel from the fuel supply, and output anode exhaust that contains hydrogen and carbon dioxide; a methanator configured to receive the anode exhaust, convert at least a portion of the hydrogen in the anode exhaust to methane, and output methanated anode exhaust; a chiller assembly configured to cool the methanated anode exhaust to a predetermined temperature so as to liquefy carbon dioxide in the methanated anode exhaust; and a gas separation assembly configured to receive the cooled methanated anode exhaust and separate the liquefied carbon dioxide from residual fuel gas.

A power production system includes a flue gas generator configured to generate a flue gas that includes carbon dioxide and oxygen; a fuel supply; a fuel cell assembly that includes: a cathode section configured to receive the flue gas generated by the flue gas generator, and output cathode exhaust, and an anode section configured to receive fuel from the fuel supply, and output anode exhaust that contains hydrogen and carbon dioxide; a methanator configured to receive the anode exhaust, convert at least a portion of the hydrogen in the anode exhaust to methane, and output methanated anode exhaust; a chiller assembly configured to cool the methanated anode exhaust to a predetermined temperature so as to liquefy carbon dioxide in the methanated anode exhaust; and a gas separation assembly configured to receive the cooled methanated anode exhaust and separate the liquefied carbon dioxide from residual fuel gas.

A combined cooling, heating and power system is formed by integrating a CO.sub.2 cycle subsystem, an ORC cycle subsystem, and an LNG cold energy utilization subsystem based on an SOFC/GT hybrid power generation subsystem. The combined system can achieve efficient and cascade utilization of energy and low carbon dioxide emission. An SOFC/GT hybrid system is used as a prime mover. High-, medium-, and low-temperature waste heat of the system are recovered through CO.sub.2 and ORC cycles, respectively. Cold energy (for air conditioning and refrigeration), heat, power, natural gas, ice, and dry ice can be provided by using LNG as a cold source of the CO.sub.2 and ORC cycles. Low CO.sub.2 emission is achieved by condensation and separation of CO.sub.2 from flue gas, so energy loss of the system can be reduced, and efficient and cascade utilization of energy can be achieved, thereby realizing energy conservation and emission reduction.

A combined cooling, heating and power system is formed by integrating a CO.sub.2 cycle subsystem, an ORC cycle subsystem, and an LNG cold energy utilization subsystem based on an SOFC/GT hybrid power generation subsystem. The combined system can achieve efficient and cascade utilization of energy and low carbon dioxide emission. An SOFC/GT hybrid system is used as a prime mover. High-, medium-, and low-temperature waste heat of the system are recovered through CO.sub.2 and ORC cycles, respectively. Cold energy (for air conditioning and refrigeration), heat, power, natural gas, ice, and dry ice can be provided by using LNG as a cold source of the CO.sub.2 and ORC cycles. Low CO.sub.2 emission is achieved by condensation and separation of CO.sub.2 from flue gas, so energy loss of the system can be reduced, and efficient and cascade utilization of energy can be achieved, thereby realizing energy conservation and emission reduction.

A system includes a first working fluid compressor configured to pressurize a working fluid, and a prime mover coupled to the first working fluid compressor and configured to provide a mechanical input into the first working fluid compressor. An exhaust assembly is coupled to the prime mover and is configured to receive exhaust heat from the prime mover, the exhaust assembly including a generator configured to generate electric current based on the exhaust heat received by the exhaust assembly. A second working fluid compressor includes an electric motor electrically and synchronously coupled to the generator and configured to pressurize the working fluid.

A (micro) gas turbine arrangement includes a gas turbine device having a combustor system, a turbine driven by an exhaust gas stream of the combustor system, and a compressor for supplying the combustor system with a compressed oxidant stream, as well as a recuperator for transferring at least a portion of the thermal power of the exhaust gas stream of the turbine to the compressed oxidant stream. At least one bypass diverts at least a portion of the oxidant stream or the exhaust gas stream around at least one heat exchanger of the recuperator, and at least one control element for adjusting the flow through the at least one bypass, to be able to adapt the quantity of heat emitted by the gas turbine arrangement at the design point, and thus to be able to improve the efficiency of a power-heat cogeneration system having such a gas turbine arrangement.

A (micro) gas turbine arrangement includes a gas turbine device having a combustor system, a turbine driven by an exhaust gas stream of the combustor system, and a compressor for supplying the combustor system with a compressed oxidant stream, as well as a recuperator for transferring at least a portion of the thermal power of the exhaust gas stream of the turbine to the compressed oxidant stream. At least one bypass diverts at least a portion of the oxidant stream or the exhaust gas stream around at least one heat exchanger of the recuperator, and at least one control element for adjusting the flow through the at least one bypass, to be able to adapt the quantity of heat emitted by the gas turbine arrangement at the design point, and thus to be able to improve the efficiency of a power-heat cogeneration system having such a gas turbine arrangement.

In a gas turbine system including a first gas turbine generator, a heat recovery steam generator and a steam turbine generator heat rejection system, the present invention relates to a method for CO.sub.2 capture from flue gas in said system, said method including: (a) diverting an amount of heat recovery steam generator flue gas from the CO.sub.2 capture plant; and (b) mixing the diverted heat recovery steam generator flue gas with an air stream, forming a combined gas stream, wherein (1) the combined gas stream is fed to a second gas turbine generator; (2) exhaust gas from the second gas turbine generator is mixed with exhaust gas from the first gas turbine generator, forming a combined exhaust gas stream; and (3) the combined exhaust gas stream enters the heat recovery steam generator, with the CO.sub.2 content of the combined exhaust gas stream increased through supplementary firing in the heat recovery steam generator.

The present invention is a system, method and computer program for operating a land-or marine-based multi-spool gas turbine system for generating electrical power to supply a load, wherein the system comprises a multi-spool gas turbine engine, and the method comprises controlling the rotational speeds of the at least two generators independently of each other so as to directly control the rotational speeds of the shafts of the spools, the at last two generators being operable to generate electrical current to supply the load, and regulating the amount of heat generated the first heat generating equipment. A computer program to perform the method is also disclosed.

The present invention is a system, method and computer program for operating a land-or marine-based multi-spool gas turbine system for generating electrical power to supply a load, wherein the system comprises a multi-spool gas turbine engine, and the method comprises controlling the rotational speeds of the at least two generators independently of each other so as to directly control the rotational speeds of the shafts of the spools, the at last two generators being operable to generate electrical current to supply the load, and regulating the amount of heat generated the first heat generating equipment. A computer program to perform the method is also disclosed.