Northampton Electronic Collection of Theses and Research

Modelling of thermal behaviour of iron oxide layers on boiler tubes

Angelo, J., Bennecer, A., Kaczmarczyk, S. and Picton, P. (2016) Modelling of thermal behaviour of iron oxide layers on boiler tubes. Journal of Physics: Conference Series. 721(012002), pp. 1-8. 1742-6596.

Item Type: Article
Abstract: Slender boiler tubes are subject to localised swelling when they are expose to excessive heat. The latter is due to the formation of an oxide layer, which acts as an insulation barrier. This excessive heat can lead to microstructural changes in the material that would reduce the mechanical strength and would eventually lead to critical and catastrophic failure. Detecting such creep damage remains a formidable challenge for boiler operators. It involves a costly process of shutting down the plant, performing electromagnetic and ultrasonic non-destructive inspection, repairing or replacing damaged tubes and finally restarting the plant to resume its service. This research explores through a model developed using a finite element computer simulation platform the thermal behaviour of slender tubes under constant temperature exceeding 723 °K. Our simulation results demonstrate that hematite layers up to 15μm thickness inside the tubes do not act as insulation. They clearly show the process of long term overheating on the outside of boiler tubes which in turn leads to initiation of flaws.
Additional Information: Paper presented at the 5th Symposium on the Mechanics of Slender Structures (MoSS2015) held 21-22 September 2015 at Northampton
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction. Mechanics of materials > TA418.4 Mechanical wear
T Technology > TJ Mechanical engineering and machinery > TJ268 Steam engineering > TJ288 Steam-boilers
T Technology > TA Engineering (General). Civil engineering (General) > TA417.2 Nondestructive testing
Creators: Angelo, Jonhson, Bennecer, Abdeldjalil, Kaczmarczyk, Stefan and Picton, Philip
Publisher: IOP Science
Faculties, Divisions and Institutes: University Faculties, Divisions and Research Centres - OLD > Faculty of Arts, Science & Technology
Date: 2 June 2016
Date Type: Publication
Page Range: pp. 1-8
Journal or Publication Title: Journal of Physics: Conference Series
Volume: 721
Number: 012002
Language: English
ISSN: 1742-6596
Status: Published / Disseminated
Refereed: Yes
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