Numerical simulation of convective superheaters in steam boilers
Authors:
- Dawid Taler,
- Marcin Trojan,
- Piotr Dzierwa,
- Karol Kaczmarski,
- Jan Taler
Abstract
Superheaters are high-temperature cross-flow heat exchangers. Steam flows inside the tubes, and the flue gas outside in a direction perpendicular to the axes of the tubes. However, they differ very substantially from the other heat exchangers operating at low temperatures because of the high dependence of steam heat capacity on temperature and radiation heat transfer on the flue gas side. Also, the flow tube arrangement is usually complicated. Due to the work of superheaters in a harsh environment, they are prone to damage. About 40% of the emergency shutdowns of boilers are caused by overheating of the tube material which in turn causes them to break. The paper presents the mathematical model of the superheater. The finite difference model with distributed parameters is based on the solution of energy conservation equations for steam, tube wall, and flue gas. TheCFDsuperheater modelwasalsodevelopedtoverifythe finite-differencemodel.Themodeldevelopedinthe paper can be used to assess the fouling degree of the superheater tubes by ash.
- Record ID
- CUTb47ce54804c14cc28a655fc0867395bf
- Publication categories
- ;
- Author
- Other language title versions
- Numerical simulation of convective superheaters in steam boilers
- Journal series
- International Journal of Thermal Sciences, ISSN 1290-0729, e-ISSN 1778-4166
- Issue year
- 2018
- Vol
- 129
- Pages
- 320-333
- Other elements of collation
- schem.; tab.; wykr.; Bibliografia (na s.) - 331-332; Bibliografia (liczba pozycji) - 37; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 129
- Keywords in English
- steam superheater, heat exchangers, mathematical model, ash fouling
- DOI
- DOI:10.1016/j.ijthermalsci.2018.03.005 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S1290072918300243 Opening in a new tab
- 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/CUTb47ce54804c14cc28a655fc0867395bf/
- URN
urn:pkr-prod:CUTb47ce54804c14cc28a655fc0867395bf
* 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.