A combined cycle turbine plant having at least one gas turbine, a steam turbine and at least one waste heat steam generator. The waste heat steam generator has at least one condensate pre-heater into which a condensate line discharges, and has a feed water pre-heater which is connected upstream of the condensate pre-heater in the flow direction of a gas turbine flue gas and upstream of which, on the feed water side, there is connected a feed water pump, and which is connected to a fuel preheating unit for the gas turbine. From the fuel preheating unit a line for cooled feed water discharges into a motive medium inlet of a jet pump of which the suction medium inlet is connected to an outlet of the condensate pre-heater and of which the outlet is connected to the condensate line. A corresponding method recirculates condensate in a combined cycle turbine plant.

A combined cycle turbine plant having at least one gas turbine, a steam turbine and at least one waste heat steam generator. The waste heat steam generator has at least one condensate pre-heater into which a condensate line discharges, and has a feed water pre-heater which is connected upstream of the condensate pre-heater in the flow direction of a gas turbine flue gas and upstream of which, on the feed water side, there is connected a feed water pump, and which is connected to a fuel preheating unit for the gas turbine. From the fuel preheating unit a line for cooled feed water discharges into a motive medium inlet of a jet pump of which the suction medium inlet is connected to an outlet of the condensate pre-heater and of which the outlet is connected to the condensate line. A corresponding method recirculates condensate in a combined cycle turbine plant.

The gas turbine facility 10 of the embodiment includes a combustor 20 combusting fuel and oxidant, a turbine 21 rotated by combustion gas, a heat exchanger 23 cooling the combustion gas, a heat exchanger 24 removing water vapor from the combustion gas which passed through the heat exchanger 23 to regenerate dry working gas, and a compressor 25 compressing the dry working gas until it becomes supercritical fluid. Further, the gas turbine facility 10 includes a pipe 42 guiding a part of the dry working gas from the compressor 25 to the combustor 20 via the heat exchanger 23, a pipe 44 exhausting a part of the dry working gas to the outside, and a pipe 45 introducing a remaining part of the dry working gas exhausted from the compressor 25 into a pipe 40 coupling an outlet of the turbine 21 and an inlet of the heat exchanger 23.

A method and system for heat recovery and/or power plant cooling, incorporating an ejector configured to transfer vapor from a generator to a condenser. The ejector includes a converging-diverging nozzle to create a low pressure zone that entrains a fluid. The ejector is within a cooling fluid cycle line in heat exchange combination with an exhaust flue gas. Two fluid flows of the fluid cycle line are mixed via the ejector into a combined fluid, wherein the ejector adjusts a temperature and/or pressure of the combined fluid. Condensing the combined fluid provides a cooling medium.

A method and system for heat recovery and/or power plant cooling, incorporating an ejector configured to transfer vapor from a generator to a condenser. The ejector includes a converging-diverging nozzle to create a low pressure zone that entrains a fluid. The ejector is within a cooling fluid cycle line in heat exchange combination with an exhaust flue gas. Two fluid flows of the fluid cycle line are mixed via the ejector into a combined fluid, wherein the ejector adjusts a temperature and/or pressure of the combined fluid. Condensing the combined fluid provides a cooling medium.

A system includes a gas turbine system having a heat recovery steam generator (HRSG), a compressor, an intercooler, and a steam turbine. The HRSG is configured to receive an exhaust gas, heat a first working fluid with the exhaust gas, and route the first working fluid to the steam turbine, where the steam turbine is configured to extract energy from the first working fluid, and where the intercooler is configured to receive a compressed air from the compressor of the gas turbine engine and to cool the compressed air to a first controllable temperature determined by engine controls with a second working fluid having a second controllable temperature suitable for cooling the compressed air to the first controllable temperature determined by the engine controls. The system also includes a first feed heater of a distillation system, where the first feed heater is configured to receive the mixture and the second working fluid such that the second working fluid sinks heat to the mixture. The system also includes a first-effect vessel of the distillation system. The first-effect vessel is configured to receive the mixture from the first feed heater and to receive the first working fluid from the steam turbine, such that the first working fluid sinks heat to the mixture.

A system includes a gas turbine system having a heat recovery steam generator (HRSG), a compressor, an intercooler, and a steam turbine. The HRSG is configured to receive an exhaust gas, heat a first working fluid with the exhaust gas, and route the first working fluid to the steam turbine, where the steam turbine is configured to extract energy from the first working fluid, and where the intercooler is configured to receive a compressed air from the compressor of the gas turbine engine and to cool the compressed air to a first controllable temperature determined by engine controls with a second working fluid having a second controllable temperature suitable for cooling the compressed air to the first controllable temperature determined by the engine controls. The system also includes a first feed heater of a distillation system, where the first feed heater is configured to receive the mixture and the second working fluid such that the second working fluid sinks heat to the mixture. The system also includes a first-effect vessel of the distillation system. The first-effect vessel is configured to receive the mixture from the first feed heater and to receive the first working fluid from the steam turbine, such that the first working fluid sinks heat to the mixture.

A gas turbine cooling system of the present invention includes a cooler that cools compressed air extracted from an air compressor to make cooling air, a cooling air compressor that supplies the cooling air to a combustion liner of a combustor, and an IGV that regulates a flow rate of the cooling air. The control device of the gas turbine cooling system includes a target value setting part that determines a target value with respect to a flow rate equivalent value of the cooling air according to detected temperature of the cooling air, a correction driving amount calculation part that obtains a correction driving amount which reduces a deviation of detected flow rate equivalent value of the cooling air with respect to the target value, and a drive command output part that outputs a drive command corresponding to the correction driving amount to the IGV.

A gas turbine cooling system of the present invention includes a cooler that cools compressed air extracted from an air compressor to make cooling air, a cooling air compressor that supplies the cooling air to a combustion liner of a combustor, and an IGV that regulates a flow rate of the cooling air. The control device of the gas turbine cooling system includes a target value setting part that determines a target value with respect to a flow rate equivalent value of the cooling air according to detected temperature of the cooling air, a correction driving amount calculation part that obtains a correction driving amount which reduces a deviation of detected flow rate equivalent value of the cooling air with respect to the target value, and a drive command output part that outputs a drive command corresponding to the correction driving amount to the IGV.

A Rankine cycle apparatus includes a pump, an evaporator, an expander, a condenser, and an internal heat exchanger. The internal heat exchanger allows heat exchange to take place between a working fluid discharged from the expander and a working fluid discharged from the pump. A temperature of the working fluid at an inlet of the expander is set so that a temperature of the working fluid at an outlet of the expander be higher than a saturation temperature on a high-pressure side of the cycle.