Numerical Modelling of Steam Superheaters in Supercritical Boilers

Katarzyna Węglarz, Dawid Taler, Jan Taler () and Mateusz Marcinkowski ()
Additional contact information
Katarzyna Węglarz: Department of Thermal Processes, Air Protection and Waste Utilisation, Faculty of Environmental Engineering and Energy, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland
Dawid Taler: Department of Thermal Processes, Air Protection and Waste Utilisation, Faculty of Environmental Engineering and Energy, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland
Jan Taler: Department of Energy, Faculty of Environmental Engineering and Energy, Cracow University of Technology, al. Jana Pawła II 37, 31-864 Cracow, Poland
Mateusz Marcinkowski: Department of Thermal Processes, Air Protection and Waste Utilisation, Faculty of Environmental Engineering and Energy, Cracow University of Technology, ul. Warszawska 24, 31-155 Cracow, Poland

Energies, 2023, vol. 16, issue 6, 1-19

Abstract: This paper presents a numerical model of a four-pass supercritical steam superheater with a complex flow system. The specific heat of steam is a function of temperature and pressure, and the specific heat of flue gas is a function of temperature. Pressure and temperature changes along the length of the tubes were also determined. The modified Churchill equation was used to calculate the steam-side friction factor of Darcy–Weisbach. The flue gas temperature variations behind the individual superheater tube rows were calculated. The steam and wall temperature distributions were determined in each tube row along its length. Knowing the temperature of the tube walls and the steam along the flow direction enables the selection of the correct steel grade for the tubes. Thanks to this advantage of the proposed method, the investment can be reduced in superheater construction without the danger of overheating the tube material. The results of the superheater simulation were compared with the results of measurements on the actual object. The proposed numerical method can find application in steam superheaters’ design and performance calculations. It can also be used to monitor superheater operating parameters, which are difficult to measure due to the high flue gas temperature.

Keywords: live steam superheater; mathematical model; supercritical steam boiler; pressure distribution; wall temperature distribution (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/6/2615/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/6/2615/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2023:i:6:p:2615-:d:1093327

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().