Verfahren zur Kühlung einer Gasturbine sowie Gasturbine zur Durchführung des Verfahrens

Details

Veröffentlichungs-Nr.

EP3093432

Aktenzeichen

EP15167859

Anmeldetag

15. Mai 2015

Veröffentlichung

21. April 2021

Erteilung

21. April 2021

Rechtsraum

EP

IPC

F01D5/08F02C7/18

Abstract

The Invention relates to a method for cooling a gas turbine (10), which comprises a turbine (15), wherein a rotor (11), which rotates about a machine axis, carries a plurality of rotating blades (17), which are mounted on said rotor (11) by means of blade roots and extend with their airfoils into a hot gas path of said gas turbine (10), wherein said rotor (11) is concentrically surrounded by a turbine vane carrier (13) carrying a plurality of stationary vanes (16), whereby said rotating blades (17) and said stationary vanes (16) are arranged in alternating rows in axial direction. An extended lifetime with external cooling is achieved by providing first and second cooling systems (A, B) for said turbine (15), whereby said first cooling system (A) uses cooling air of a first pressure and first temperature and said second cooling system (B) uses cooling air of a second pressure and second temperature substantially smaller than said first pressure and first temperature, and whereby said first cooling system (A) is used to cool the airfoils of said rotating blades (17) and said turbine vane carrier (13) and said stationary vanes (16), and whereby said second cooling system (B) is used to cool said rotor (11) and said blade roots of said rotating blades (17) in at least one row of said rotating blades (17).

Anmelder

Firmen

Ansaldo Energia Switzerland AG
General Electric Technology GmbH

Land

🇨🇭 Schweiz

Fachgebiete