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Proceedings Paper

Monitoring of hot pipes at the power plant Neurath using guided waves
Author(s): Bianca Weihnacht; Thomas Klesse; Robert Neubeck; Lars Schubert
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Paper Abstract

In order to reduce the CO2-emissions and to increase the energy efficiency, the operating temperatures of power plants will be increased up to 720°C. This demands for novel high-performance steels in the piping systems. Higher temperatures lead to a higher risk of damage and have a direct impact on the structure stability and the deposition structure. Adequately trusted results for the prediction of the residual service life of those high strength steels are not available so far. To overcome these problems the implementation of an online monitoring system in addition to periodic testing is needed. RWE operates the lignite power plant Neurath. All test and research activities have to be checked regarding their safety and have to be coordinated with the business operation of the plant. An extra bypass was established for this research and made the investigations independent from the power plant operating. In order to protect the actuators and sensors from the heat radiated from the pipe, waveguides were welded to the bypass. The data was evaluated regarding their dependencies on the environmental influences like temperature and correction algorithms were developed. Furthermore, damages were introduced into the pipe with diameters of 8 mm to 10 mm and successfully detected by the acoustic method.

Paper Details

Date Published: 19 April 2013
PDF: 8 pages
Proc. SPIE 8692, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013, 86921T (19 April 2013); doi: 10.1117/12.2008479
Show Author Affiliations
Bianca Weihnacht, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (Germany)
Thomas Klesse, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (Germany)
Robert Neubeck, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (Germany)
Lars Schubert, Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren (Germany)

Published in SPIE Proceedings Vol. 8692:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2013
Jerome Peter Lynch; Chung-Bang Yun; Kon-Well Wang, Editor(s)

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