Novel online simulation-ready models of conjugate heat transfer in combustion chamber waterwall tubes of supercritical power boilers
Authors:
- Wiesław Zima,
- Marzena Nowak-Ocłoń,
- Paweł Ocłoń
Abstract
This paper presents two models of fluid heating in waterwall tubes of supercritical steam boilers. The models are named 1D/2D and 1D/3D. The models are formulated and discussed in detail with an industrial application example. For the 1D/2D model, a two-dimensional (2D) transient heat conduction equation is solved for the tube wall with the fin domain, while one-dimensional (1D) mass, momentum, and energy equations are solved for the fluid domain. The 1D/3D model considers a three-dimensional tube wall domain (3D) and onedimensional fluid domain. At the fluid-solid interface, a conjugate heat transfer model is applied. The model is based on convective flux between the fluid and solid domains. Nonlinear governing balance equations of mass, momentum, and energy for fluid are solved using the forward time backward space (FTBS) scheme. The proposed models allow incorporation of the effect of heat flux nonuniformities along the waterwall tube and on its outer circumference. Transient simulations are carried out to determine the temperature histories for both the fluid and the tube wall in the selected cross sections. The computations are performed using the finite volume method formulation. The results obtained from the 1D/2D model are nearly the same as those from the 1D/3D model; however, the computation time is more than five times shorter. Therefore, an efficient 1D/2D model can be used in power unit simulators.
- Record ID
- CUTb470e1b7c867470ba0bfa1fb395f4ae9
- Publication categories
- ;
- Author
- Journal series
- Energy, ISSN 0360-5442, e-ISSN 1873-6785
- Issue year
- 2018
- Vol
- 148
- Pages
- 809-823
- Other elements of collation
- schem.; tab.; wykr.; Bibliografia (na s.) - 823; Bibliografia (liczba pozycji) - 38; Oznaczenie streszczenia - Abstr.; Data udostępnienia on-line - 2018-02-03; Numeracja w czasopiśmie - Vol. 148
- Keywords in English
- waterwall tubes, supercritical steam boilers, conjugate heat transfer, mathematical models, finite volume method, forward time backward space
- DOI
- DOI:10.1016/j.energy.2018.01.178 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0360544218302068?via%3Dihub 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/CUTb470e1b7c867470ba0bfa1fb395f4ae9/
- URN
urn:pkr-prod:CUTb470e1b7c867470ba0bfa1fb395f4ae9
* 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.