Hitachi, Ltd.

Naohiko Iwata

Takeshi Sato

Nobuyuki Iizuka

Isao Sato

Ken Ichiryu

Fumiyuki Hirose

Hiraku Ikeda

Yoshito Tanaka

Akira Shimura

Yasutaka Komatsu

Yasuhiko Otawara

Minoru Takaba

Takeshi Iwamiya

Takeshi Ishida

Isao Fujita

Seiki Taketomo

A gas turbine apparatus has a gas turbine and a plurality of burners for providing combustion gas to drive the turbine. A flow control means of each burner for fuel or combustion air is adjusted by control means to control each said burner individually in dependence on a predetermined combustion characteristic of the respective burner. Sensed quantities relating to the combustion performance of the burners are input to the control means which adjusts the flow control means of each burner in dependence on the sensed quantities and the predetermined combustion characteristic of the respective burner.

Gas turbine apparatus and method of control thereof

A steam governing valve includes a valve body constituting a main valve together with a main valve seat formed on a casing body and having a smaller valve seat inside thereof, a valve rod movable in the valve body in an axial direction of the valve and constituting a smaller valve together with the smaller valve seat, a sleeve arranged in the casing body and guiding the valve body in an axial direction, and a pressure chamber defined by the casing body, the valve body and the sleeve. The pressure chamber communicates with an entrance chamber through a clearance provided on the sliding portions of the sleeve and valve body, and the main valve is opened by lifting the valve rod beyond the fully open position of the smaller valve. The valve body is formed on the cylindrical outer surface thereof with a plurality of axially extending grooves arranged at equal intervals in a circumferential direction. The sleeve is formed with a plurality of steam passages at positions opposite to the axially extending grooves and the pressure chamber communicates with the entrance chamber through the steam passages and the axially extending grooves when the valve body is lifted beyond a predetermined valve opening degree.

Steam governing valve

A fluid leakage detecting element comprises a heat generating resistive member and a temperature compensating resistive member disposed on a substrate. Each of the resistive members is prepared in the form of a paste of a metal which has a high temperature coefficient and a high thermal conductivity and whose melting point is higher than the baking temperature of the substrate. These resistive members are printed in thick film form on the substrate which is sufficiently electrical insulating and has a high thermal conductivity.

Fluid leakage detecting element

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Hitachi, Japan

Naohiko Iwata