Hitachi, Ltd.

Kuniyoshi Tsubouchi

Satoshi Dodo

Susumu Nakano

Norio Yasugahira

Shohei Yoshida

Hiroshi Arita

Manabu Yagi

Tsutomu Okusawa

Yasuaki Akatsu

Masaya Ichinose

Takeshi Sato

Masanori Watanabe

Shigeo Hatamiya

Toshihiko Fukushima

Masatoshi Watanabe

Nobuo Hamano

Akira Arai

Kiyoshi Namura

Yoshitaka Hirata

Hajime Toriya

Ryoichi Kaneko

Makoto Hemmi

Tomoaki Inoue

Yusuke Takagi

Tadaharu Kishibe

Saburo Usami

Shigeo Sakurai

Yoichi Yoshinaga

Yoshio Kojima

Kenji Mitani

Sadao Umezawa

Itsurou Sawada

Hiroshi Miyata

A combustor for a gas turbine capable of performing stable combustion even by using high temperature air, comprising a first burner () jetting fuel and air into a combustion chamber () and a second burner () causing the circulating jet of the fuel and air installed at a position corresponding to the tip part of a flame caused by the first burner ().

Combustor for gas turbine

A gas turbine power generator plant, intended to reduce its noise by making small the intake and exhaust outlets of the cooing air channel of a case, comprises an engine core in which a turbine, a compressor and a generator are installed on the same axis, a combustor for burning air for combustion compressed by the compressor and supplying the air to the turbine, a radiator for cooling a coolant or a lubricant, a cooling fan for ventilating the radiator with cooling air, an electric power converter for converting electric power generated by the generator, and the case for housing these constituent elements. And, a combustion air channel passing the compressor, the combustor and the turbine and a cooling air channel passing the radiator, the cooling fan and the electric power converter are formed as mutually independent channels from intake to exhaust.

Gas turbine power generator plant and silencer for the same

Provided is a gas turbine power plant in which a rotor of a generator is journalled by water lubrication bearings into which a part of cooling water for cooling the generator is fed. Since the lubrication water has a viscosity lower than that of lubrication oil, it is possible to provide a gas turbine power plant with less energy loss resulting in lower power consumption for accessories, and in high power generation efficiency.

Gas turbine power plant

A turbine nozzle () that, among components constructing a turbine, reaches particularly high temperature is efficiently cooled with a relatively simple structure. A double casing structure in which a turbine casing () is provided outside a turbine shell () is formed. The turbine casing () functions as a flow path () for compressed air () before combustion. The turbine shell () covers a turbine nozzle () and a radial turbine impeller () and forms flow paths () for combustion gas (). The compressed air () before combustion flowing in the flow path (), for compressed air, having air-tightness between itself and the outside air is blown to the turbine nozzle () through a through-hole () penetrating both wall surfaces of the turbine shell () so that the turbine nozzle () is evenly cooled and the compressed air used to cool the turbine nozzle is made to flow toward the turbine impeller ().

Radial turbine and method of cooling nozzle of the same

Gas turbine power generator plant with mutually independent cooling air channels from intake to exhaust

An object of the present invention is to provide a gas turbine power generator capable of increasing the power generation efficiency in partial load operation and decreasing a variation in the number of rotations caused by a variation in power generation load. The gas turbine power generator comprises a compressor () for compressing air, a combustor () for burning the compressed air and fuel, a turbine () driven by combustion gas produced in the combustor and driving the compressor () and a generator (), a regenerative heat exchanger () for exchanging heat between exhaust gas from the turbine and the compressed air led into the combustor, an intake air sprayer (), and a humidifier (). Intake air flown into the regenerative heat exchanger () is humidified and cooled by the intake air sprayer () and the humidifier ().

Gas turbine power generator having humidifying and cooling means

A heat and electric power supply system includes a regenerative gas turbine and an adsorption refrigerator recovering exhaust heat of exhaust gas from the gas turbine and is provided with inlet air cooling equipment including a spray device for spraying cold water from the adsorption refrigerator into an air-intake port of the regenerative gas turbine and a humidifier effecting humidification by hot water injection from the refrigerator into a compressor delivery port of the regenerative gas turbine. The cooling by cold water and humidification by hot water injection are effected according to operational conditions.

Heat and electric power supply system and operation method thereof

A gas-liquid separation method for electroconductive gas-liquid two phase flow and the device therefor wherein electrodes are disposed in the vicinity of inlet and outlet portions of the gas-liquid separation region in the flow passage of electroconductive gas-liquid two phase flow so as to flow an electric current thereto. A magnet is disposed in the gas-liquid separation region of the flow passage so as to generate a magnetic field perpendicular to the current and to generate an electromagnetic force acting along the flow passage wall on the electroconductive liquid by taking advantage of the Flemming's left hand law, thereby separating the electroconductive gas-liquid two phase flow into gas phase and liquid phase. A hydrophobic porous material having water permeability is employed as the flow passage wall in the gas-liquid separation region; the gas-liquid separation region is disposed in a reduced pressure region; and the separated gas phase is effectively removed out of the flow passage.

Gas-liquid separation device for electroconductive gas-liquid two phase

Method of opening and closing a fluid passage comprises the steps of freezing fluid in the fluid passage by first cooling the fluid to a temperature below the freezing point of the fluid to close the fluid passage and after the fluid passage is closed, raising the temperature of the fluid close (or just below) to the freezing point of the fluid, whereby the fluid passage is maintained in a closed state with a small power supply and the responsiveness in opening the fluid passage is enhanced.

Shut off apparatus for a fluid passage, method for controlling the same,

The life expectancy of a mechanical structure that undergoes repeated loading is estimated by determining the maximum crack length on the surface of the structure. The maximum length of the cracks on the surface of the structure is related to the life ratio of the structure, wherein the life ratio is a ratio of the number of loads the structure has undergone to the number of loads the structure will undergo until failure. An optical system is used to measure the crack length of the cracks on the surface of the structure being inspected. A statistical distribution of greatest length cracks for a sampling of areas within a larger area can be made. Apparatus is provided to statistically process such distribution data to obtain a statistically estimated maximum length crack for the larger area. The maximum crack length determination can be used to estimate the life expectancy of the structure from the relationship between crack length and life ratio.

Method and apparatus for estimating life expectancy of mechanical

An apparatus for transferring a small amount of fluid has at least one series of vibration pump units each having a fluid transfer pipe designed to perform a respirating action by the operation of a vibrator which vibrates in response to application of a high-frequency voltage. The fluid transfer pipes are connected in series via fluid diodes which serve to enable the fluid to flow only in one direction, while resisting reversing of the fluid, so that the fluid is transferred in one direction through the successive fluid transfer pipes. In order to minimize the pulsation of the fluid pressure at the downstream end of the apparatus, the vibrators of the pump unit are excited with predetermined phase differentials. Additional fluid diode is connected to the outlet end of the most downstream pump unit. The pressure differential across at least one of the fluid diodes is measured and the rate of transfer of the fluid performed by the fluid transfer apparatus is controlled in accordance with the measured pressure differential. In a specific form of the invention, a plurality of rows to of the vibration pump units are disposed in parallel, and the pressure differentials are measured across orifices provided on the downstream ends of the respective rows of the pump unit serieses deviations of the measured pressure differentials are detected. A control is preformed in accordance with the measured pressure differential deviations so as to equalize the flow rates of the fluid in all the parallel rows of vibration pump units.

Apparatus for transferring small amount of fluid

An apparatus for transferring a small amount of fluid has at least three vibration pump units which are connected in series. Each vibration pump unit has a fluid transfer pipe, a vibrator mounted on the outer peripheral surface of the fluid transfer pipe and adapted to cause the transfer pipe to vibrate in a respiring manner, an inner peripheral electrode on the inner peripheral surface of the vibrator, an outer peripheral electrode on the outer peripheral surface of the vibrator, a high-frequency voltage applying device for applying a high-frequency voltage between the inner peripheral electrode and the outer peripheral electrode thereby causing the vibrator to vibrate in respiring manner, and a fluid diode exhibiting resistance to reversing of the fluid and connected to the fluid outlet of the fluid transfer pipe in such a manner as to permit the fluid to be discharged from the fluid pipe. The adjacent vibration pumps operate with a predetermined phase difference therebetween.

A cooling device for a steam turbine wherein a portion of boiler feedwater for cooling a casing of the turbine is supplied, after being heated by high pressure feedwater heaters, to a cooling fluid passage for the casing as a cooling fluid satisfying the temperature and pressure conditions necessary for effecting cooling of the casing, by a booster pump and a regenerating heat exchanger. After cooling the casing, the cooling fluid is returned to a boiler feedwater system following a heat exchange with a cooling fluid for cooling the casing.

Cooling device of steam turbine

In a blade lattice structure for an axial fluid machine including circumferentially arranged stationary blades and upper and lower side walls having the stationary blades secured thereto for defining therebetween a flow path which is arranged annularly, the stationary blades each have a cross sectional shape such that the thickness of each stationary blade gradually increases in going toward the upper side wall from an arbitrarily selected position on the blade in its height, so that the area of a throat for each section of the stationary blade is varied along the height thereof to thereby increase stage efficiency.

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Mito, Japan

Kuniyoshi Tsubouchi