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Mechanism Study of Heat Transfer Enhancement Using Twisted Hexagonal Tube with Slurry from Biogas Plant
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.ORCID iD: 0000-0002-0200-9960
Key Laboratory of Material and Chemical Engineering, Nanjing Tech University, Nanjing .
State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing .
2017 (English)In: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 142, p. 880-885Article in journal (Refereed) Published
Abstract [en]

Waste-heat recovery from discharged slurries is important to improve the biogas production efficiency but still remains challenge duo to the special properties of slurries in anaerobic digestion process. In this work, numerical study was carried out to investigate the flow field, and heat transfer performance of slurry from biogas plant in the twisted hexagonal and other twisted tubes was simulated with computer fluid dynamic (CFD) for the first time. The numerical method was validated with experimental data from the literature. The heat transfer performance and flow resistance of twisted hexagon tube were calculated and compared with other types of twisted tubes. The enhancement factor of the twisted hexagonal tube reached to 2 and kept optimum at turbulence flow region compared to the twisted tubes with square and elliptical cross section. Meanwhile, the mechanism of heat transfer enhancement with different twisted tubes was further studied, and the optimal field synergy and minimum local circulation flow near the wall are the main reasons for the high performance and low flow resistance of the twisted hexagonal tube.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 142, p. 880-885
National Category
Energy Engineering
Research subject
Energy Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-67537DOI: 10.1016/j.egypro.2017.12.141Scopus ID: 2-s2.0-85041495126OAI: oai:DiVA.org:ltu-67537DiVA, id: diva2:1180731
Conference
9th International Conference on Applied Energy, Cardiff UK, August 21-24, 2017
Note

Konferensartikel i tidskrift

Available from: 2018-02-06 Created: 2018-02-06 Last updated: 2018-02-19Bibliographically approved

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CiteExportLink to record
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  • apa
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