Hitachi, Ltd.

Mitsubishi Hitachi Power Systems, Ltd.

Sumco Techxiv Kabushiki Kaisha

Hidetoshi Kuroki

Nobuaki Kizuka

Atsushi Sano

Yasuyuki Watanabe

Shinya Marushima

Isao Takehara

Hidetaro Murata

Hironori Tsukidate

Seisaku Takihana

Yasuhiro Horiuchi

Kenji Nanataki

Masahiro Shibata

Shinya Imano

Jun Sato

Yutaka Shiraishi

Ryo Akiyama

Takashi Shibayama

Hironori Kamoshida

Motoaki Yoshinaga

A twin-shaft gas turbine can be used for 50 and 60 Hz power generation without using a reducer. A gas generator includes a compressor that generates compressed air, a burner that burns a fuel mixed with the compressed air received from the compressor so as to generate combustion gas, and a high-pressure turbine that is rotationally driven by the combustion gas received from the burner and generates driving force for the compressor. An output turbine includes a low-pressure turbine that is driven by exhaust gas received from the high-pressure turbine and a power generator that is driven by the low-pressure turbine. A control device reduces opening degree of IGV of the compressor and thereby reduces power of the compressor, and the rotational frequency of the gas generator is increased in a full-speed no-load operating state of the power generator.

Twin-shaft gas turbine for multiple frequency power generation

An axial-flow compressor with variable stator vanes located at a single stage can be modified by adding variable stator vanes to the axial-flow compressor so that the variable stator vanes are located at a plurality of stages. The axial-flow compressor includes stator vane rows located at the plurality of stages and include the variable stator vanes extending in a radial direction of the axial-flow compressor and rotating around rotary shafts of the variable stator vanes so as to adjust angles of the variable stator vanes; a plurality of rings are connected to the stator vane rows and drive and rotate the variable stator vanes of the stator vane rows that correspond to respective rings; a plurality of levers that correspond to the plurality of rings; a rotary shaft that holds the plurality of levers so as to enable the levers to pivot.

Axial-flow compressor and modification method

Disclosed is a gas turbine and a gas turbine power facility which flexibly accommodate changes in layout of devices and in user's needs. This invention includes an air compressor; a turbinecoaxially coupled to the compressor; a turbine casingaccommodating the compressorand the turbine; a compressor output shaftfor coupling rotary devices including a power generator, the compressor output shaftprotruding from the turbine casingtowards the compressor; and a turbine output shaftfor coupling the rotary devices, the turbine output shaftprotruding from the turbine casingtowards the turbine

Gas turbine and gas turbine power facilities

An Ni base forged alloy is easy to make hot forging and miniaturization of crystal grains while excellent high-temperature strength and segregation property are compatible. The Ni base forged alloy has solid solution temperature of a precipitation strengthening phase lower than or equal to 970&#xb0; C., difference in the solid solution temperature between a &#x3b4;-phase and the precipitation strength phase larger than or equal to 50&#xb0; C., Al of 0.5 to 1.0%, Cr of 17 to 21%, Fe of 17 to 19%, Nb of 4.5 to 5.5%, Ti of 0.8 to 1.3%, W of 3.0 to 6.0%, B of 0.001 to 0.03%, C of 0.001 to 0.1% and Mo of 1.0% or less in mass percentage [%] and remainder made of Ni and inevitable impurities.

Ni base forged alloy and gas turbine utilizing the same

It is an object of the present invention to provide a compressor that has a simple structure, produces a damping effect and improves aerodynamic performance. In a compressor including stator bladescircumferentially mounted to an inner circumferential surface side of a casingforming a annular path; and an inner barrelsupported by the casing and arranged on the radially inside of the stator blade as a partition wall on the radial side of the annular path; the stator blade includes an outer shroudmounted to an inner circumferential surface of the casing at a position facing the inner barrel, and an inner shroudsupporting a blade portion at an inner diameter side, the inner shroud being disposed in an annular groove formed in an outer circumferential surface of the inner barrel facing the inner shroud. The stator blade including the outer shroud, the inner shroudand the blade portionsare formed in a monolithic structure by milling.

Compressor

A method for producing a silicon wafer in which occurrence of slip starting from interstitial-type point defects is prevented in a part from the shoulder to the top of the straight cylinder portion of a silicon single crystal when the silicon single crystal is grown by pulling method under growth conditions entering an I-rich region. In order to prevent occurrence of slip in the range from the shoulder (A) to the top of the straight cylinder portion (B), the silicon single crystal () is pulled under conditions that the oxygen concentration Oi from the shoulder (A) to the top of the straight cylinder portion (B) of the silicon single crystal () is not lower than a predetermined concentration for preventing slip starting from interstitial-type point defects, more specifically not lower than 9.0&#xd7;10atoms/cm.

Method for producing silicon wafer

Provided is a member having an internal cooling passageformed therein and having opposed partition wallsbetween which a medium flows to cool a parent material, including a first heat transfer ribwhich extends from almost the center between the opposed partition wallsto one partition walland slants in a downstream direction of the medium, and a second heat transfer ribwhich extends from almost the center between the opposed partition wallsto the other partition walland slants in the downstream direction of the medium, wherein a slitorwhich passes through between an upstream side of the cooling passageand a downstream side thereof is formed in the first heat transfer ribor the second heat transfer rib

Member having internal cooling passage

An airfoil profile is formed such that a passage width ratio, represented in a dimensionless manner, of an inter-blade passage width of vane root cross-section to an outlet throat width substantially monotonously decreases from a blade inlet toward a blade outlet. The blade has a blade airfoil profile shape in an envelope within a range of .+&#x2212;.2.0 mm in a direction normal to any surface location of an airfoil profile portion. The airfoil profile portion has a reference airfoil contour represented in Cartesian coordinates wherein Z is a distance representing a sectional height from a root of the airfoil profile portion. The contours represented by X and Y at each section Z are joined smoothly with one another in a blade height direction to form a complete shape of the airfoil profile portion.

Turbine blade

A plant facility in which lubricant supply equipment for supplying a lubricant to rotor bearings and a speed reducer can be dispensed with. The plant facility comprises a gas turbine rotor of a gas turbine that serves as a prime mover driven by expansion work of a working fluid, a generator rotor of a power generator that serves as load equipment rotated by rotational power transmitted from the gas turbine rotor, a plurality of magnetic bearings for supporting the gas turbine rotor and the generator rotor, and an electromagnetic coupling for magnetically coupling the gas turbine rotor and the generator rotor and adjusting a speed reduction ratio between the gas turbine rotor and the generator rotor in accordance with supplied power.

Plant facility

A turbine power plant includes power generation apparatuses divided into a plurality of modules, a common base mounting thereon the power generation apparatuses and a supporting apparatus for supporting the common base. The common base is constructed so as to be commonly used as a part of a transportation vehicle and as a frame of the power plant.

Turbine power plant, installation process and removal process of the turbine power plant

A turbine power plant comprises power generation apparatuses divided a plurality of modules, a common base mounting thereon the power generation apparatuses and a supporting apparatus for supporting the common base, and is characterized by a construction of the common base, constructed so as to be commonly used with a part of a transportation vehicle and a frame of the power plant.

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Hitachi, Japan

Hidetoshi Kuroki