Mitsubishi Heavy Industries Limited

Hiroaki Yoshida

Kazuhiro Takeda

Yuichi Hirakawa

Kazuko Takeshita

Hiroaki Fukushima

Makoto Tsutsui

Takeo Tokumoto

Masahiko Yamashita

Kengo Hirano

A method for evaluating a crack in a metal member comprises a first removal step (S) and a second removal step (S). In the first removal step (S), a step for electrolyzing a metal member having an oxide scale formed on a surface thereof, a step for acquiring an image of the oxide scale as a first image, and a step for determining whether or not a scale crack has occurred are repeated until occurrence of a scale crack is determined. In the second removal step (S), a step for electrolyzing the metal member having the scale crack, a second image acquisition step for acquiring an image of the oxide scale as a second image, and a second determination step for determining whether or not the scale crack has disappeared are repeated until disappearance of the oxide scale is determined.

Method for evaluating crack in metal member and method for evaluating fatigue damage in metal member

Provided is a compressor control unit with a high response ability to changes of gas condition of a compressor (compressor suction temperature, pressure, gas specific gravity, pressure ratio of suction pressure and discharge pressure). In the control unit for a compressor that supplies gas into a gas turbine through a header tank, an inlet gas condition is measured and a load command value from a gas turbine controller is corrected to be increased or decreased corresponding to the measured inlet gas condition.

Compressor control unit and gas turbine power plant including this unit

Growing community of inventors

Hiroshima, Japan

Hiroaki Yoshida