A comprehensive thermal and structural transient analysis of a boiler’s steam outlet header by means of a dedicated algorithm and FEM simulation
Authors:
- Marcin Pilarczyk,
- Bohdan Węglowski,
- Lars O. Nord
Abstract
Increasing the share of renewables in energy markets influences the daily operation of thermal power units. High capacity power units are more frequently operated to balance power grids and, thus, steam boilers are exposed to unfavorable transient states. The aim of this work was to perform thermal and structural analyses of a boiler’s outlet steam header, with a capacity of 650·103 kg/h (180 kg/s) of live steam. Based on the measured steam pressure and temperatures on the outer surface of the component, transient temperature fields were determined by means of an algorithm that allows determination of transient stress distributions on the internal and external surfaces, as well as at stress concentration regions. In parallel, a finite element method simulation was performed. A comparison of the obtained results to a finite element analysis showed satisfactory agreement. The analyses showed that the start-up time could be reduced because the total stress did not exceed the allowed values during the regular start-up of the analyzed power unit. The algorithm was efficient and easy to implement in the real control systems of the power units. The numerical approach employed in the presented algorithm also allowed for determination of the time- and place-dependent heating rate value, which can be used as input data for the control system of the power unit.
- Record ID
- CUT0ef9bd9cb3df4721b8ea8f2d547486b5
- Publication categories
- ; ;
- Author
- Journal series
- Energies, ISSN , e-ISSN 1996-1073, Biweekly
- Issue year
- 2020
- Vol
- 13
- No
- 1
- Pages
- [1-12]
- Article number
- 111
- Other elements of collation
- rys.; wykr.; Bibliografia (na s.) - 11-12; Bibliografia (liczba pozycji) - 18; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 13, Iss. 1, Spec. Iss.
- Substantive notes
- Tyt. spec. iss.: Selected Papers from XII International Conference on Computational Heat, Mass and Momentum Transfer (ICCHMT2019))
- Conference
- XII International Conference on Computational Heat, Mass and Momentum Transfer (ICCHMT2019), 2019, 03-09-2019 - 06-09-2019, Rzym, Włochy
- Keywords in English
- transient state, start-up, thick-walled component, thermal stress, power unit, combined cycle
- DOI
- DOI:10.3390/en13010111 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1073/13/1/111/htm 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/CUT0ef9bd9cb3df4721b8ea8f2d547486b5/
- URN
urn:pkr-prod:CUT0ef9bd9cb3df4721b8ea8f2d547486b5
* 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.