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In-situ heat loss measurement of parabolic trough receivers based on transient infrared thermography

Caron, Simon and Röger, Marc (2016) In-situ heat loss measurement of parabolic trough receivers based on transient infrared thermography. Solar Energy, 135, pp. 111-121. Elsevier. DOI: 10.2016/j.solener.2016.05.033 ISSN 0038-092X

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Official URL: http://authors.elsevier.com/a/1T8gH,tRc-0ZX

Abstract

The design lifetime of parabolic trough receivers is at least 25 years. However, depending on the specific operating conditions, this expected lifetime may be shortened. A periodic inspection of receivers mounted in a solar field is thus recommended. Several field methods with distinct depth of information and field throughput exist to estimate receiver thermal performance. This paper gives an overview of these field methods and presents the application of a transient infrared thermography method, which combines dynamic temperature measurements with a numerical heat transfer model in order to derive specific receiver heat losses and separate internal heat loss mechanisms. This method has been previously investigated under laboratory test conditions and is here applied under field test conditions for in-situ thermal measurements on mounted receivers. The transient thermography method allows a correct estimation of specific heat losses within a precision range below ±10% for all tested receivers under field test conditions. Relevant separation of heat loss mechanisms could be derived for evacuated PTRs with solar selective absorber coating, while partially based diagnoses could be observed for partially or non-evacuated PTRs with highly emissive absorber coatings. Active thermography is considered as a relevant tool for receiver field inspection, in combination with a complementary field screening measurement technique.

Item URL in elib:https://elib.dlr.de/104634/
Document Type:Article
Title:In-situ heat loss measurement of parabolic trough receivers based on transient infrared thermography
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Caron, SimonSimon.Caron (at) dlr.deUNSPECIFIED
Röger, MarcMarc.Roeger (at) dlr.dehttps://orcid.org/0000-0003-0618-4253
Date:2016
Journal or Publication Title:Solar Energy
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:135
DOI :10.2016/j.solener.2016.05.033
Page Range:pp. 111-121
Publisher:Elsevier
ISSN:0038-092X
Status:Published
Keywords:parabolic trough receiver, in-situ heat loss measurement, transient infrared thermography, inverse heat transfer problem
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Thermal Technology
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Impact of Desert Environment (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Qualifizierung
Deposited By: Kruschinski, Anja
Deposited On:27 Jul 2016 14:30
Last Modified:10 Jan 2019 15:50

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