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A New Transient Thermography Method For Parabolic Trough Receiver Heat Loss Measurement

Röger, Marc und Potzel, Peter und Pernpeintner, Johannes (2010) A New Transient Thermography Method For Parabolic Trough Receiver Heat Loss Measurement. In: Proceedings of SolarPACES 2010. SolarPACES. SolarPACES 2010, 21.-24. Sept. 2010, Perpignan, France.

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Offizielle URL: http://www.solarpaces2010.org/

Kurzfassung

This paper describes a new transient method to measure the heat loss of parabolic trough receiver tubes using transient thermography. The method complements already existing stationary measurement methods which use energy balances or the observed glass enve-lope temperature to deduce thermal losses. It is shown that by a thermal excitation of the absorber tube and by both measuring the absorber tube and the glass envelope temperature responses, the receiver heat loss can be calculated. Additionally, the emissivity of the se-lective coating and the quality of the annulus vacuum can be derived. The advantages, challenges and limits of the new method are presented and compared to the established sta-tionary methods. Simulation results and first measurements which validate the simulations and findings are described. An uncertainty analysis shows that used in the solar field, this method reduces the measurement uncertainty from about 15 to 20% (conventional station-ary field measurement technique) to about 6% (new transient method).

Dokumentart:Konferenzbeitrag (Paper, Poster)
Titel:A New Transient Thermography Method For Parabolic Trough Receiver Heat Loss Measurement
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Röger, Marcmarc.roeger@dlr.de
Potzel, Peterp.potzel@web.de
Pernpeintner, Johannesjohannes.pernpeintner@dlr.de
Datum:September 2010
Erschienen in:Proceedings of SolarPACES 2010
Referierte Publikation:Nein
In ISI Web of Science:Nein
Verlag:SolarPACES
Status:veröffentlicht
Stichwörter:parabolic trough receiver, heat loss, measurement, transient thermography, transient modeling
Veranstaltungstitel:SolarPACES 2010
Veranstaltungsort:Perpignan, France
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:21.-24. Sept. 2010
Veranstalter :SolarPACES, CNRS
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:E SF - Solarforschung (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Qualifizierung (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Technische Thermodynamik > Solarforschung
Hinterlegt von: Marc Röger
Hinterlegt am:21 Jan 2011 14:57
Letzte Änderung:12 Dez 2013 21:13

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