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1. (WO2013110365) METHOD FOR CONTROLLING A COOLING PROCESS OF TURBINE COMPONENTS

Pub. No.:    WO/2013/110365    International Application No.:    PCT/EP2012/071982
Publication Date: Fri Aug 02 01:59:59 CEST 2013 International Filing Date: Thu Nov 08 00:59:59 CET 2012
IPC: F01K 13/02
F01D 25/12
Applicants: SIEMENS AKTIENGESELLSCHAFT
Inventors: RIEMANN, Stefan
Title: METHOD FOR CONTROLLING A COOLING PROCESS OF TURBINE COMPONENTS
Abstract:
The invention relates to a method for controlling a cooling process of turbine components (8, 10, 12) of a steam turbine shaft, wherein an air flow mixed with a water mist is used to cool the turbine components (8, 10, 12) during a mist cooling phase (P4). In particular, the mist cooling phase (P4) is preceded by an air cooling phase (P3), during which an air flow is used to cool the turbine components. A constant temporal temperature gradient is specified for the cooling process, wherein the air flow density is adjusted by means of the valve position of a controllable regulating valve (26) and a switch is made from the air cooling phase (P3) to the mist cooling phase (P4) if the maximum air flow density is reached and in particular if the regulating valve (26) is fully open.