Monitoring of thermal stresses in pressure components based on the wall temperature measurement
Authors:
- Jan Taler,
- Dawid Taler,
- Karol Kaczmarski,
- Piotr Dzierwa,
- Marcin Trojan,
- Tomasz Sobota
Abstract
Thick-wall boiler components limit maximum heating and cooling rates during start-up or shut-down of the boiler. First, the allowable heating rates of the critical pressure components of the boiler were determined, and the temperature of the fluid was determined. The rate of change of the wall temperature of the pressure element and the thermal stress on the inner surface are controlled online and compared with the permissible values. Boiler manufacturers designate thermal stresses on the inner surface of the pressure component on the edge of the hole based on the measurement of the wall temperature at two points located inside it. Due to the low accuracy of the method used by boiler manufacturers, a new stress-determination method has been proposed in this paper in which only the internal temperature measurement point is used to determine the stresses on the inner surface of the component. In the method proposed in the paper, first, the internal surface temperature is determined from the inverse heat conduction solution, and then the stresses are calculated. Numerous computational tests were performed for cylindrical and spherical elements. Thermal stresses on the inner surface were also determined based on actual measurement data. Thermal stresses can be monitored at small time intervals. The advantage of the method is its high accuracy even at rapid changes in the fluid temperature.
- Record ID
- CUT6f0d0ff90bd14f6baa9999ab77573525
- Publication categories
- ;
- Author
- Journal series
- Energy, ISSN 0360-5442, e-ISSN 1873-6785
- Issue year
- 2018
- Vol
- 160
- Pages
- 500-519
- Other elements of collation
- fot.; rys.; tab.; wykr.; Bibliografia (na s.) - 519; Bibliografia (liczba pozycji) - 25; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 160
- Keywords in English
- monitoring, thermal stress, heating rate, pressure component, temperature measurement
- DOI
- DOI:10.1016/j.energy.2018.07.010 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0360544218312982 Opening in a new tab
- Related project
- Metoda identyfikacji gęstości strumienia ciepła na powierzchni ciała stałego w warunkach szybkozmiennego pola temperatury przepływającego płynu. . Project leader at PK: , ,
Projects financed by NSC [Projekty finansowane przez NCN] - Language
- eng (en) English
- Score (nominal)
- 45
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT6f0d0ff90bd14f6baa9999ab77573525/
- URN
urn:pkr-prod:CUT6f0d0ff90bd14f6baa9999ab77573525
* 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.