Abstract: A power plant system can comprise a first gas turbine having a first efficiency to produce a first exhaust flow, a first electrical generator driven by the first gas turbine, a first heat recovery steam generator to receive the first exhaust flow and generate a first steam flow, a second gas turbine having a second efficiency less than the first efficiency to produce a second exhaust flow, a second electrical generator driven by the second gas turbine, and an exhaust gas conditioning device to reduce temperature of the second exhaust flow, a steam turbine driving a steam electrical generator to receive the first steam flow. The second gas turbine can be selectively operated to generate electricity with the second electrical generator under peak loading conditions when a sum of output from the steam electrical generator and the first electrical generator are less than an electrical demand from a grid.

Abstract: A remodeling method of a combined cycle plant including gas turbines; heat recovery steam generators provided corresponding to number of the gas turbines and configured to recover heat of flue gas discharged from the gas turbines and produce steam by the recovered heat; ducts configured to guide the flue gas from the gas turbines toward the respective heat recovery steam generators; and a steam turbine configured to be rotationally driven by the steam produced by the heat recovery steam generators. The remodeling method of a combined cycle plant includes: removing gas turbines and ducts; installing, in place of the two gas turbines, a new gas turbine that is higher in efficiency and smaller in number than the two gas turbines; and installing, in place of the ducts, a distribution duct configured to distribute and guide flue gas from the new gas turbine to two heat recovery steam generators.

Abstract: A power plant system can comprise a first gas turbine having a first efficiency to produce a first exhaust flow, a first electrical generator driven by the first gas turbine, a first heat recovery steam generator to receive the first exhaust flow and generate a first steam flow, a second gas turbine having a second efficiency less than the first efficiency to produce a second exhaust flow, a second electrical generator driven by the second gas turbine, and an exhaust gas conditioning device to reduce temperature of the second exhaust flow, a steam turbine driving a steam electrical generator to receive the first steam flow. The second gas turbine can be selectively operated to generate electricity with the second electrical generator under peak loading conditions when a sum of output from the steam electrical generator and the first electrical generator are less than an electrical demand from a grid.

Abstract: The occurrence of corrosion on the inner surfaces of pipes is to be minimized in a cooling air system of a gas turbine. Specifically, this gas turbine power generation equipment has: a gas turbine including a turbine connected to a generator, a combustor that supplies combustion gas to the turbine, and a compressor that supplies compressed air to the combustor; a cooling air system that supplies compressed air bled from the compressor to the turbine, the cooling air system being connected at a first end side to an intermediate stage or an outlet of the compressor and connected at a second end side to the turbine; and a drying air system that supplies drying air into the cooling air system when the gas turbine is stopped, the drying air system being connected to the cooling air system.

Abstract: Provided is a remodeling method of a combined cycle plant including gas turbines; heat recovery steam generators provided corresponding to number of the gas turbines and configured to recover heat of flue gas discharged from the gas turbines and produce steam by the recovered heat; ducts configured to guide the flue gas from the gas turbines toward the respective heat recovery steam generators; and a steam turbine configured to be rotationally driven by the steam produced by the heat recovery steam generators. The remodeling method of a combined cycle plant includes: removing gas turbines and ducts; installing, in place of the two gas turbines, a new gas turbine that is higher in efficiency and smaller in number than the two gas turbines; and installing, in place of the ducts, a distribution duct configured to distribute and guide flue gas from the new gas turbine to two heat recovery steam generators.

Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air taken in from an intake-air inlet 22 to a compressor 14 of the gas turbine; a cooling part provided in the intake duct and configured to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a protruding step part 13 formed in a convex shape protruding from bottom surfaces 12a1, 12a2 of the intake duct disposed on a downstream side of the cooling part; and at least one drain hole 110 formed in the bottom surfaces 12a1, 12a2 of the intake duct disposed on the downstream side of the cooling part so as to discharge drain water, generated on a surface of the cooling part and dropping from the surface, to an outside of the intake duct.

Abstract: The occurrence of corrosion on the inner surfaces of pipes is to be minimized in a cooling air system of a gas turbine. Specifically, this gas turbine power generation equipment has: a gas turbine including a turbine connected to a generator, a combustor that supplies combustion gas to the turbine, and a compressor that supplies compressed air to the combustor; a cooling air system that supplies compressed air bled from the compressor to the turbine, the cooling air system being connected at a first end side to an intermediate stage or an outlet of the compressor and connected at a second end side to the turbine; and a drying air system that supplies drying air into the cooling air system when the gas turbine is stopped, the drying air system being connected to the cooling air system.

Abstract: A gas turbine cooling system includes an organic Rankine cycle in which a cycle medium repeatedly circulates through condensation and evaporation, an air-extraction line configured to extract compressed air from a compressor of a gas turbine, a cooling apparatus for cooling the compressed air while heating and evaporating the cycle medium condensed in the organic Rankine cycle using heat of the compressed air passing through the air-extraction line, and a cooling air line configured to guide the compressed air cooled by the cooling apparatus to a high temperature section of the gas turbine.

Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air from an intake-air inlet 22 to a compressor 14 of the gas turbine, the intake duct having a vertical duct 12c and a manifold part 12d disposed on a downstream side of the vertical duct; a cooling part 26 provided in the intake duct to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a filter part 42 provided on an inlet side of the manifold part to remove impurities contained in the intake air introduced through the vertical duct; and a drain catcher 110 constituted by a gutter member provided immediately above the filter part along inner wall surfaces 12c1, 12c2 of the vertical duct, the drain catcher being configured to collect drain water flowing along the inner wall surfaces of the vertical duct.

Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air taken in from an intake-air inlet 22 to a compressor 14 of the gas turbine 18; a cooling part 26 provided in the intake duct to cool the intake air by heat exchange with a cooling medium introduced from an outside; a drain discharge line 102 connected to a part of the intake duct below an inlet 14a of the compressor so as to discharge drain water flowing along an inner peripheral surface of the intake duct; and a water seal part 104 provided in the drain discharge line 102 to keep water seal in a part of the drain discharge line 102 by a water pressure at least corresponding to an amount of a negative pressure in the vicinity of the inlet of the compressor.

Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air taken in from an intake-air inlet 22 to a compressor 14 of the gas turbine; a cooling part provided in the intake duct and configured to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a protruding step part 13 formed in a convex shape protruding from bottom surfaces 12a1, 12a2 of the intake duct disposed on a downstream side of the cooling part; and at least one drain hole 110 formed in the bottom surfaces 12a1, 12a2 of the intake duct disposed on the downstream side of the cooling part so as to discharge drain water, generated on a surface of the cooling part and dropping from the surface, to an outside of the intake duct.

Abstract: An intake air cooling system 100 for a gas turbine 18 is provided with: an intake duct 12 for leading intake air from an intake-air inlet 22 to a compressor 14 of the gas turbine, the intake duct having a vertical duct 12c and a manifold part 12d disposed on a downstream side of the vertical duct; a cooling part 26 provided in the intake duct to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a filter part 42 provided on an inlet side of the manifold part to remove impurities contained in the intake air introduced through the vertical duct; and a drain catcher 110 constituted by a gutter member provided immediately above the filter part along inner wall surfaces 12c1, 12c2 of the vertical duct, the drain catcher being configured to collect drain water flowing along the inner wall surfaces of the vertical duct.