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Infrared temperature measurement on solar trough absorber tubes

Pfänder, Markus and Lüpfert, Eckhard and Pistor, Paul (2006) Infrared temperature measurement on solar trough absorber tubes. Solar Energy, 81, pp. 629-635. Esevier. DOI: 10.1016/j.solener.2006.08.016. ISSN 0038-092X.

Full text not available from this repository.

Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/329/description#description

Abstract

The temperature distribution on solar trough absorber tubes determines thermal losses and hotspots can lead to material stress and limit absorber tube lifetime. The concentrated solar radiation, however, makes it difficult to determine the temperature on solar absorbers. Temperature sensors that require contact to the measurement object are not appropriate and even pyrometry fails, when external light sources interfere. Only solar-blind pyrometry offers reliable temperature readings without perturbation through reflected solar radiation. This paper presents two concepts for a pyrometric solar-blind measurement on solar trough absorber tubes. One solar-blind approach is a spectral measurement range in regions, where the solar spectrum shows gaps due to the discrete absorption of the atmosphere. Another possibility for a solar-blind pyrometric temperature measurement results from the optical behavior, i.e. the distinct angle dependence of the directional reflectance and emittance of a typical selective trough absorber coating. First experimental results are shown and the accuracy and performance advantages and disadvantages of the setups are reported and discussed.

Document Type:Article
Title:Infrared temperature measurement on solar trough absorber tubes
Authors:
AuthorsInstitution or Email of Authors
Pfänder, MarkusUNSPECIFIED
Lüpfert, EckhardUNSPECIFIED
Pistor, PaulUNSPECIFIED
Date:17 October 2006
Journal or Publication Title:Solar Energy
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:81
DOI:10.1016/j.solener.2006.08.016
Page Range:pp. 629-635
Editors:
EditorsEmail
Ramos, CarlosUNSPECIFIED
Publisher:Esevier
ISSN:0038-092X
Status:Published
Keywords:Solar-blind; Pyrometry; Infrared; Temperature measurement; Parabolic trough
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 - Solare Hochtemperatursysteme (old)
Location: other
Institutes and Institutions:Institute of Technical Thermodynamics > Solar Research > Solare Energietechnik
Deposited By: Markus Pfänder
Deposited On:11 Jan 2008
Last Modified:27 Apr 2009 13:04

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