Tohoku Electric Power Company, Inc.

Mitsubishi Heavy Industries Limited

Mitsubishi Hitachi Power Systems, Ltd.

Mitsubishi Power, Ltd.

Yoshiaki Nishimura

Junichiro Masada

Kazumasa Takata

Tatsuo Ishiguro

Satoshi Mizukami

Yuya Fukunaga

Masaki Satoh

Hiroki Takahashi

Masato Hayashi

Souji Hasegawa

Norio Oogai

Shinya Ishikawa

Hiroyuki Yamazaki

Ikuo Okada

Tetsu Konishi

Shunsuke Torii

Keizo Tsukagoshi

Masaki Taneike

Yoshiaki Igarashi

Provided is a high-strength, heat-resistant, Ni-base alloy comprising Co: from 5 to 12%, Cr: from 5 to 12%, Mo: from 0.5 to 3.0%, W: from 3.0 to 6.0%, Al: from 5.5 to 7.2%, Ti: from 1.0 to 3.0%, Ta: from 1.5 to 6.0%, Re: from 0 to 2.0%, and C: from 0.01 to 0.20%. The high-strength, heat-resistant, Ni-base alloy is constituted of a Ni-based alloy, the balance of the Ni-based alloy comprising Ni and inevitable impurities. The density of the high-strength, heat-resistant Ni-base alloy is less than 8.5 g/cm.

High-strength, heat-resistant Ni-base alloy, method for producing same, and gas turbine blade

Provided is a gas turbine capable of achieving high-speed startup of the gas turbine through quick operation control of an ACC system during startup of the gas turbine, improving the cooling efficiency of turbine stationary components, and quickly carrying out an operation required for cat back prevention during shutdown of the gas turbine. Included are a pressurizing device () connected to a branching channel () branching from the discharge side of a compressor () and capable of carrying out an operation for introducing and pressurizing air independently from the compressor (); a temperature-control-medium supply channel () that guides compressed air pressurized at the pressuring device () to a turbine-cooling-medium channel () provided in stationary components of a turbine (); and a temperature-control-medium return channel () that guides the compressed air that has passed through the turbine-cooling-medium channel () to the discharge side of the compressor () such that the flows are combined, and the pressurizing device () is operated at startup of the gas turbine and in preparation immediately before startup to carry out temperature-raising and cooling by letting the compressed air flow in the turbine-cooling-medium channel (). The pressurizing device () is operated during shutdown of the gas turbine to exhaust the high-temperature gas remaining in the turbine ().

Gas turbine and operating method thereof

In a cooling structure for a recovery-type air-cooled gas turbine combustor having a recovery-type air-cooling structure that bleeds, upstream of the combustor, and pressurizes compressed air supplied from a compressor, that uses the bled and pressurized air to cool a wall, and that recovers and reuses the bled and pressurized air as combustion air for burning fuel in the combustor together with a main flow of the compressed air, wall cooling in which cooling air is supplied to cooling air passages formed in the wall of the combustor to perform cooling involves a downstream wall region, closer to a turbine, that is cooled using the bled and pressurized air as the cooling air and an upstream wall region, closer to a burner, that is cooled using, as the cooling air, bled compressed air bled from a main flow of the compressed air through a housing inner space.

Cooling structure for recovery-type air-cooled gas turbine combustor

Growing community of inventors

Miyagi, Japan

Yoshiaki Nishimura