Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Power, Ltd.

Mitsubishi Power Americas, Inc.

Jiro Asakuno

Masaru Takamatsu

Katsuhiro Hotta

Keita Fujii

Toshihiko Toyota

Yasuoki Tomita

Tadakuni Nishio

Tatsunao Nagashima

Masashi Nishimura

Kuniaki Aoyama

David Hunt

Shinichi Yamazaki

Scott Cloyd

Shin Akazawa

Michael Ducker

Naoki Sakagami

Eiji Akita

Takaaki Nagakawa

Yasuhiro Takashima

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.

Over-powering

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.

Remodeling method of combined cycle plant, distribution duct, and combined cycle plant

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.

Gas turbine power generation equipment, and device and method for drying gas turbine cooling air system

An intake air cooling systemfor a gas turbineis provided with: an intake ductfor leading intake air taken in from an intake-air inletto a compressorof 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 partformed in a convex shape protruding from bottom surfacesof the intake duct disposed on a downstream side of the cooling part; and at least one drain holeformed in the bottom surfacesof 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.

Intake air cooling system

An intake air cooling systemfor a gas turbineis provided with: an intake ductfor leading intake air from an intake-air inletto a compressorof the gas turbine, the intake duct having a vertical ductand a manifold partdisposed on a downstream side of the vertical duct; a cooling partprovided in the intake duct to cool the intake air by heat exchange with a cooling medium which is introduced from an outside; a filter partprovided on an inlet side of the manifold part to remove impurities contained in the intake air introduced through the vertical duct; and a drain catcherconstituted by a gutter member provided immediately above the filter part along inner wall surfacesof the vertical duct, the drain catcher being configured to collect drain water flowing along the inner wall surfaces of the vertical duct.

Growing community of inventors

Tokyo, Japan

Jiro Asakuno