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Assembly and attachment methods for extended aluminum fins onto steel tubes for high temperature latent heat storage units

Johnson, Maike und Hübner, Stefan und Braun, Markus und Martin, Claudia und Fiß, Michael und Hachmann, Bernd und Schönberger, Manfred und Eck, Markus (2018) Assembly and attachment methods for extended aluminum fins onto steel tubes for high temperature latent heat storage units. Applied Thermal Engineering. Elsevier. doi: 10.1016/j.applthermaleng.2018.08.035. ISSN 1359-4311.

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Offizielle URL: https://doi.org/10.1016/j.applthermaleng.2018.08.035

Kurzfassung

High temperature latent heat storages are being developed for both concentrating solar thermal power applications as well as integration in industrial processes. One of the concepts being developed is an extended finned-tube in a shell-and-tube assembly. This concept can be used at high pressures for steam applications and be built at a large scale. The design of the extended fins allowing for independent thermal expansion of the steel tubes and the aluminum fins with a physically possible assembly has not thus far been optimized. Due to the large fin surfaces necessary for storing large amounts of heat, conventional finned-tube assemblies have to date not been applicable for thermal energy storage systems. Designs using spring steel clips on axial fins have been proven, using conservatively high numbers of clips. In this paper, various fin and tube diameters with spring steel clips as well as other mounting methods are compared. Experiments were conducted to analyze the mechanical strength of the assembly; these are described and the results discussed. In addition, two assembly methods were tested using the same fin geometry and testing environment, allowing for a thermodynamic comparison of the assemblies. The tests have shown that while the steel clips allow for the best heat transfer, the crimping method has a higher bond strength. These results can be used for reducing costs and optimizing design of high temperature latent heat storages.

elib-URL des Eintrags:https://elib.dlr.de/121396/
Dokumentart:Zeitschriftenbeitrag
Titel:Assembly and attachment methods for extended aluminum fins onto steel tubes for high temperature latent heat storage units
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iD
Johnson, Maike*Maike.Johnson (at) dlr.dehttps://orcid.org/0000-0002-1903-9955
Hübner, StefanLinde AG
Braun, Markusmar.braun (at) dlr.de
Martin, Claudiaclaudia.martin (at) dlr.de
Fiß, Michaelmichael.fiss (at) dlr.de
Hachmann, Berndbernd.hachmann (at) broekelmann.com
Schönberger, ManfredLinde AG
Eck, MarkusUniversity of Applied Science Osnabrück
*DLR corresponding author
Datum:21 August 2018
Erschienen in:Applied Thermal Engineering
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
DOI:10.1016/j.applthermaleng.2018.08.035
Verlag:Elsevier
ISSN:1359-4311
Status:veröffentlicht
Stichwörter:extended fin, PCM, latent heat, assembly method, clip, crimp
HGF - Forschungsbereich:Energie
HGF - Programm:Speicher und vernetzte Infrastrukturen
HGF - Programmthema:Thermische Energiespeicher
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SP - Energiespeicher
DLR - Teilgebiet (Projekt, Vorhaben):E - Thermochemische Prozesse (Speicher) (alt)
Standort: Stuttgart
Institute & Einrichtungen:Institut für Technische Thermodynamik > Thermische Prozesstechnik
Hinterlegt von: Johnson, Maike
Hinterlegt am:07 Sep 2018 14:07
Letzte Änderung:02 Nov 2023 09:56

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