Caron, Simon and Röger, Marc and Pernpeintner, Johannes (2015) Transient infrared thermography heat loss measurements on parabolic trough receivers under laboratory conditions. Energy Procedia (69), pp. 310-319. Elsevier. doi: 10.1016/j.egypro.2015.03.035. ISSN 1876-6102.
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Abstract
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 receiver specific heat loss is determined by applying a thermal excitation to the absorber tube and by measuring both the absorber and glass temperature response signals with infrared pyrometers. These transient signals are processed to derive a mean absorber temperature, a mean glass temperature, an amplitude ratio and a phase shift at a mean air temperature. Temperature signals are used to identify 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 2% to 4% for evacuated receivers with selective coating and from 1% to 9% for receivers with black painted absorbers.
Item URL in elib: | https://elib.dlr.de/96908/ | ||||||||||||
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Document Type: | Article | ||||||||||||
Title: | Transient infrared thermography heat loss measurements on parabolic trough receivers under laboratory conditions | ||||||||||||
Authors: |
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Date: | May 2015 | ||||||||||||
Journal or Publication Title: | Energy Procedia | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | Yes | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
DOI : | 10.1016/j.egypro.2015.03.035 | ||||||||||||
Page Range: | pp. 310-319 | ||||||||||||
Publisher: | Elsevier | ||||||||||||
ISSN: | 1876-6102 | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | Parabolic Trough Receiver, Transient Infrared Thermography, Heat Loss Measurement | ||||||||||||
HGF - Research field: | Energy | ||||||||||||
HGF - Program: | Renewable Energies | ||||||||||||
HGF - Program Themes: | Concentrating Solar Systems (old) | ||||||||||||
DLR - Research area: | Energy | ||||||||||||
DLR - Program: | E SF - Solar research | ||||||||||||
DLR - Research theme (Project): | E - Qualification (old) | ||||||||||||
Location: | Köln-Porz | ||||||||||||
Institutes and Institutions: | Institute of Solar Research > Qualifizierung | ||||||||||||
Deposited By: | Kruschinski, Anja | ||||||||||||
Deposited On: | 30 Jun 2015 13:07 | ||||||||||||
Last Modified: | 06 Sep 2019 15:22 |
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