Testing of heat transfer coefficients and frictional losses in internally ribbed tubes and verification of results through CFD modelling
Authors:
- Sławomir Grądziel,
- Karol Majewski,
- Marek Majdak,
- Łukasz Mika,
- Karol Sztekler,
- Rafał Kobyłecki,
- Robert Zarzycki,
- Małgorzata Pilawska
Abstract
This paper presents experimental determination of the heat transfer coefficient and the friction factor in an internally rifled tube. The experiment was carried out on a laboratory stand constructed in the Department of Energy of the Cracow University of Technology. The tested tube is used in a Polish power plant in a supercritical circulating fluidized bed (CFB) boiler with the power capacity of 460 MW. Local heat transfer coefficients were determined for Reynolds numbers included in the range from ~6000 to ~50,000, and for three levels of the heating element power. Using the obtained experimental data, a relation was developed that makes it possible to determine the dimensionless Chilton–Colburn factor. The friction factor was also determined as a function of the Reynolds number ranging from 20,000 to 90,000, and a new correlation was developed that represents the friction factor in internally ribbed tubes. The local heat transfer coefficient and the friction factor obtained during the testing were compared with the CFD modelling results. The modelling was performed using the Ansys Workbench application. The k-ω, the k-ε and the transition SST (Share Stress Transport) turbulence models were applied.
- Record ID
- CUTa198eef9aff144d3b55480ef4c37b38c
- Publication categories
- ;
- Author
- Journal series
- Energies, ISSN , e-ISSN 1996-1073, Biweekly
- Issue year
- 2022
- Vol
- 15
- No
- 1
- Pages
- [1-17]
- Article number
- 207
- Other elements of collation
- rys.; schem.; tab.; wykr.; Bibliografia (na s.) - 16-17; Bibliografia (liczba pozycji) - 24; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 15, Iss. 1, Spec. Iss.
- Substantive notes
- Special Issue: Computational Thermal, Energy, and Environmental Engineering
- Keywords in English
- frictional losses, heat transfer coefficient, internally ribbed tube, CFD modelling
- ASJC Classification
- DOI
- DOI:10.3390/en15010207 Opening in a new tab
- URL
- https://www.mdpi.com/1996-1073/15/1/207 Opening in a new tab
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Score source
- journalList
- Score
- Publication indicators
- Citation count
- 5
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTa198eef9aff144d3b55480ef4c37b38c/
- URN
urn:pkr-prod:CUTa198eef9aff144d3b55480ef4c37b38c
* 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.