An analysis of a reheater failure and a proposal to upgrade the device design
Authors:
- Piotr Duda,
- Łukasz Felkowski,
- Adam Zieliński,
- Andrzej Duda
Abstract
The aim of this paper is to present an example of damage to the reheater tubes and conduct the material and numerical analyses to establish the cause of the device failure. Cracks were observed on the first, second, and third tube row. Close to the damaged area, a ferritic structure could be observed with highly degraded bainite areas, characterized by coagulation and coalescence of precipitates. The cause of the damage was analysed using the finite element method (FEM). The big yield of the tube cross-section confirmed that the tube may get damaged during subsequent cycles of the boiler operation, which was also proved by the microstructure testing results. For the reheater under analysis, the tubes have to be lengthened to achieve a reduction in stresses, arising due to thermal loads to values lower than allowable stresses according to Standard EN 13480-3. The modelling results confirmed the correct operation for the upgraded system. The aim of this paper is to present an example of damage to the reheater tubes and conduct the numerical analyses to establish the cause of the device failure. Cracks were observed on the first, second and third tube row. Failure analysic of mechanical structures can be clasified in scientific discipline of Mechanical Engineering.
- Record ID
- CUT5c8f47ed84594e7f8aa73e0ddd0222cf
- Publication categories
- ;
- Author
- Journal series
- Energies, ISSN , e-ISSN 1996-1073, Biweekly
- Issue year
- 2019
- Vol
- 12
- No
- 12
- Pages
- [1-10]
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 10; Bibliografia (liczba pozycji) - 18; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 12, Iss. 12
- Keywords in English
- reheater, rupture, microstructural degradation, failure analysis
- DOI
- DOI:10.3390/en12122255 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1073/12/12/2255 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT5c8f47ed84594e7f8aa73e0ddd0222cf/
- URN
urn:pkr-prod:CUT5c8f47ed84594e7f8aa73e0ddd0222cf
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.