Analysis of temperature drops on the wall thickness of a supercritical boiler water-wall tube
Authors:
- Wieslaw Zima
Abstract
The paper presents selected results of numerical computations related to simula-tions of a supercritical power boiler evaporator operation. A detailed analysis is carried out of temperature drops on the thickness of the water-wall tube and the tube fin. A comparison is also made between the results obtained at the fin divi-sion into one and two control volumes. The tube cross-sections analysed along the tube length and including the fins are divided into 24 control volumes, for which 2-D transient heat conduction equations are formulated. The 1-D equa-tions describing the principles of mass, momentum, and energy conservation are solved on the side of the working fluid. A convective condition, described by an empirical heat transfer coefficient, is set on the water-wall tube inner surface. The developed mathematical model is a distributed parameter model. The numer-ical computations are performed for a boiler operating in a power plant in Po-land. The analysis takes account of the non-uniformity of the furnace chamber thermal load along its height.
- Record ID
- CUTcc5f74703839400088522d04ea68553d
- Publication categories
- ; ;
- Author
- Journal series
- Thermal Science, ISSN 0354-9836, e-ISSN 2334-7163
- Issue year
- 2019
- Vol
- 23, Suppl. 4
- Pages
- S1091-S1100
- Other elements of collation
- rys.; wykr.; Bibliografia (na s.) - S1100; Bibliografia (liczba pozycji) - 13; Oznaczenie streszczenia - Streszcz. ang.; Numeracja w czasopiśmie - Vol. 23, Suppl. 4
- Conference
- 11th International Conference on Computational Heat and Mass Transfer (ICCHMT 2018), 2018, 28-05-2018 - 01-06-2018, Kraków, Polska
- Keywords in English
- supercritical power boiler, finned water-wall tubes, transient state, control volume method, temperature drops
- DOI
- DOI:10.2298/TSCI19S4091Z Opening in a new tab
- URL
- http://thermalscience.vinca.rs/2019/supplement-4/8 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 40
- Additional fields
- Indeksowana w: Web of Science
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTcc5f74703839400088522d04ea68553d/
- URN
urn:pkr-prod:CUTcc5f74703839400088522d04ea68553d
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