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Transient Infrared Thermography Heat Loss Measurements on Parabolic Trough Receivers Under Laboratory Conditions

Caron, Simon und Röger, Marc und Pernpeintner, Johannes (2014) Transient Infrared Thermography Heat Loss Measurements on Parabolic Trough Receivers Under Laboratory Conditions. SolarPACES Conference 2014, 2014-09-16 - 2014-09-19, Peking, China.

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Kurzfassung

This paper describes a transient infrared thermography heat loss measurement method for parabolic trough receivers and its development under laboratory conditions. The method is designed for future field measurements and represents a complementary approach to steady-state heat loss measurement methods. The basic measurement principle is to determine the specific heat loss of a receiver by applying a thermal excitation to the absorber tube and measuring the absorber and glass temperature signals with infrared pyrometers. These signals are processed to derive a mean absorber temperature, a mean glass temperature, an amplitude ratio and a phase shift at a certain air temperature. These five measurands are used to identify the receiver thermal properties with the help of a numerical heat transfer model coupled to a parameter identification algorithm. Parabolic trough receivers with distinct absorber coating and annulus properties have been tested with two different transient excitation profiles, i.e. sinusoidal and ramp-and-hold signals. The identified receiver thermal properties have been compared to steady-state heat loss experiments conducted with DLR THERMOREC test bench. The observed specific heat loss deviations between steady-state and transient laboratory measurements respectively range from 9% to 27% for evacuated receivers with selective coating and from 1% to 9% for receivers with black painted absorbers.

elib-URL des Eintrags:https://elib.dlr.de/91783/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Transient Infrared Thermography Heat Loss Measurements on Parabolic Trough Receivers Under Laboratory Conditions
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Caron, Simonsimon.caron (at) dlr.dehttps://orcid.org/0000-0002-7699-8108NICHT SPEZIFIZIERT
Röger, Marcmarc.roeger (at) dlr.dehttps://orcid.org/0000-0003-0618-4253NICHT SPEZIFIZIERT
Pernpeintner, Johannesjohannes.pernpeintner (at) dlr.dehttps://orcid.org/0000-0003-4895-6135139013574
Datum:16 September 2014
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
Status:veröffentlicht
Stichwörter:Parabolic Trough Receiver, Transient Infrared Thermography, Heat Loss Measurement
Veranstaltungstitel:SolarPACES Conference 2014
Veranstaltungsort:Peking, China
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:16 September 2014
Veranstaltungsende:19 September 2014
Veranstalter :SolarPACES
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:Konzentrierende Solarsysteme (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Qualifizierung (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Solarforschung > Qualifizierung
Hinterlegt von: Kruschinski, Anja
Hinterlegt am:11 Nov 2014 13:38
Letzte Änderung:24 Apr 2024 19:57

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