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1. (WO2017038371) GAS TURBINE AND METHOD OF OPERATING GAS TURBINE

Pub. No.:    WO/2017/038371    International Application No.:    PCT/JP2016/072934
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Fri Aug 05 01:59:59 CEST 2016
IPC: F01D 25/30
F01D 17/14
F01D 25/00
F01D 25/12
F01D 25/24
F02C 7/00
F02C 9/00
Applicants: MITSUBISHI HITACHI POWER SYSTEMS, LTD.
三菱日立パワーシステムズ株式会社
Inventors: IJIMA Takayoshi
飯島 高善
HASHIMOTO Shinya
橋本 真也
Title: GAS TURBINE AND METHOD OF OPERATING GAS TURBINE
Abstract:
This gas turbine is provided with an exhaust diffuser (5) in which is formed an exhaust passage (Pe) for channeling exhaust gas from a turbine, and a cooling device (6) for cooling a structure in the exhaust diffuser (5) that faces the exhaust passage (Pe). The cooling device (6) has: a guiding part (7) for guiding a cooling medium to the structure, a guiding passage (Pg) for channeling the cooling medium being formed inside the guiding part (7); and a switching part (8) that can switch between a first state in which the flow rate of the cooling medium flowing through the guiding passage (Pg) is brought to a first flow rate corresponding to a rated operation, and a second state in which the flow rate is brought to a second flow rate greater than the first flow rate.