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

Röger, Marc and Potzel, Peter and 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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Official URL: http://www.solarpaces2010.org/

Abstract

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).

Item URL in elib:https://elib.dlr.de/68572/
Document Type:Conference or Workshop Item (Paper, Poster)
Title:A New Transient Thermography Method For Parabolic Trough Receiver Heat Loss Measurement
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Röger, Marcmarc.roeger (at) dlr.deUNSPECIFIED
Potzel, Peterp.potzel (at) web.deUNSPECIFIED
Pernpeintner, Johannesjohannes.pernpeintner (at) dlr.deUNSPECIFIED
Date:September 2010
Journal or Publication Title:Proceedings of SolarPACES 2010
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:SolarPACES
Status:Published
Keywords:parabolic trough receiver, heat loss, measurement, transient thermography, transient modeling
Event Title:SolarPACES 2010
Event Location:Perpignan, France
Event Type:international Conference
Event Dates:21.-24. Sept. 2010
Organizer:SolarPACES, CNRS
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Qualifizierung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Engineering Thermodynamics > Solar Research
Deposited By: Röger, Dr. Marc
Deposited On:21 Jan 2011 14:57
Last Modified:12 Dec 2013 21:13

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