THE IMPACT OF THERMAL CYCLES OF SUPERHEATED STEAM ON PIPES MATERIAL OF BY-PASS STATION OF STEAM AND GAS-STEAM TURBINES

1 MORAVEC Jaromír
Co-authors:
1 BRADÁČ Josef 2 BERAN David 1 NOVÁKOVÁ Iva
Institutions:
1 Technical University of Liberec, Liberec, Czech Republic, EU, jaromir.moravec@tul.cz, josef.bradac@tul.cz, iva.novakova@tul.cz
2 Siemens, Ltd., Brno, Czech Republic, EU, david.beran@siemens.com
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
603-608
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
92 views / 24 downloads
Abstract

The by-pass station of steam turbines is a device, used to by-pass the steam from boiler to condenser by bypassing the turbine. It is especially used while starting operating conditions of the boiler, before putting the turbine-generator unit in service, or in the cases when the amount of stem produced in boiler is higher, then the amount of steam needed for operation of turbine and its accessories. In common operating mode the station is on stand-by and waiting in so called “thermal reserve”. The by-pass station is equipped with a reducer, which reduces the pressure to the stated range, and further with cooler reducing steam temperature before entering the water-cooled condenser. It can happened (during the breakdown of cooling media supply) that the temperature of flowing steam behind the cooler will rise steeply for a short time and thus the pipes behind the cooler will by thermally loaded. The aim of the submission is to show, if and possibly how the impact of these thermal cycles influences material properties of output pipe of the by-pass station made of creep resistance C-Mn steel P235GH.

Keywords: Steam Turbine, P235GH Steel, By-pass Station, Material Properties, Gleeble

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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