Title:
COMBINED CYCLE POWER PLANT
Document Type and Number:
Japanese Patent JP3530345
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To disperse the pressure loss generating parts of cooling steam and minimize the total pressure loss in a power plant having a steam cooling system for cooling a high-temperature cooled part with steam by constituting the cooling steam passage of the high-temperature cooled part by arranging a plurality of mutually independent passages in parallel to each other.
SOLUTION: The feed passage 5 of cooling steam of a gas turbine is branched in the middle to lead to the cooling steam passage 5a of a first stage stationary blade 1 and the cooling steam passage 5b of a second stage stationary blade 2. The cooling steam passages 5a, 5b are allowed to communicate with the recovering passage 6a of the first stage stationary blade 1 and the recovering passage 6b of the second stage stationary blade 2 through the cooled parts of the first and second stationary blades 1, 2, respectively, and each recovering passage 6a, 6b is combined to a steam recovering passage 6 in the slip stream. When the cooling steam passages 5a, 5b and the recovering passages 6a, 6b leading thereto are formed so as to constitute mutually independent parallel passages in the positions of the first stage and second stage stationary blades 1, 2, the pressure loss in the high-temperature cooled part is suppressed, and cooling steam can be efficiently recovered.
Inventors:
Kataoka, Masato
Ichiyanagi, Taku
Fukumizu, Yasushi
Ichiyanagi, Taku
Fukumizu, Yasushi
Application Number:
JP17967397A
Publication Date:
May 24, 2004
Filing Date:
July 04, 1997
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD
International Classes:
F01D5/08; F01D5/18; F01D9/02; F01K17/04; F01K23/10; F02C3/30; F02C6/18; F02C7/16; F02C7/18; (IPC1-7): F02C7/18; F01D5/08; F01D5/18; F01D9/02; F01K17/04; F01K23/10; F02C3/30; F02C6/18
Attorney, Agent or Firm:
石川 新 （外１名）