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NOVEL WALL-MOUNTED HOT-FILM SENSORS FOR THE MEASUREMENT OF THE FORCED CONVECTION FROM AN OPEN CYLINDRICAL CAVITY

Siegrist, Silvan und Stadler, Hannes und Hoffschmidt, Bernhard (2017) NOVEL WALL-MOUNTED HOT-FILM SENSORS FOR THE MEASUREMENT OF THE FORCED CONVECTION FROM AN OPEN CYLINDRICAL CAVITY. 9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics (ExHFT-9), 2017-06-12 - 2017-06-15, Foz do Iguacu, Brazil.

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Kurzfassung

We investigated the forced convective heat loss from a model of a multi-MW cavity receiver of a concentrated solar power (CSP) tower system in a high-pressure wind tunnel. For the tests, arrays of a novel ringlike design of hot-film sensors were placed on the inside wall of the open cylindrical cavity. A constant temperature anemometry (CTA) system controlled these sensors and returned a signal as a function of the instantaneous total heat loss in each sensor. This heat loss was interpolated and averaged to form an integral heat loss value for each given set of wind speed and wind direction. The experiments covered a Reynolds number range of between 2*10^6 and 8*10^6, based on the external flow field. During the 10 days of testing, the ringlike hot-film sensors worked reliably and proved to deliver significant and reproducible results. The maximum forced convective heat loss for the tested geometry occurs at an incident angle of 70°, at all tested Reynolds numbers.

elib-URL des Eintrags:https://elib.dlr.de/112812/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:NOVEL WALL-MOUNTED HOT-FILM SENSORS FOR THE MEASUREMENT OF THE FORCED CONVECTION FROM AN OPEN CYLINDRICAL CAVITY
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Siegrist, SilvanSilvan.Siegrist (at) dlr.dehttps://orcid.org/0000-0001-9069-2220NICHT SPEZIFIZIERT
Stadler, HannesHannes.Stadler (at) dlr.dehttps://orcid.org/0000-0001-5122-4221NICHT SPEZIFIZIERT
Hoffschmidt, BernhardBernhard.Hoffschmidt (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:13 Juni 2017
Referierte Publikation:Nein
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:hot-film sensor, constant temperature anemometry, forced convection, high-pressure wind tunnel, concentrated solar power cavity receiver
Veranstaltungstitel:9th World Conference on Experimental Heat Transfer, Fluid Mechanics and Thermodynamics (ExHFT-9)
Veranstaltungsort:Foz do Iguacu, Brazil
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:12 Juni 2017
Veranstaltungsende:15 Juni 2017
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:Konzentrierende solarthermische Technologien
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SW - Solar- und Windenergie
DLR - Teilgebiet (Projekt, Vorhaben):E - Neue Wärmeträgerfluide (alt)
Standort: Jülich
Institute & Einrichtungen:Institut für Solarforschung > Punktfokussierende Systeme
Hinterlegt von: Siegrist, Silvan
Hinterlegt am:09 Aug 2017 10:04
Letzte Änderung:24 Apr 2024 20:17

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