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Pyrometric Temperature Measurement on Solar Thermal High Temperature Receivers

Pfänder, Markus and Lüpfert, Eckhard and Heller, Peter (2006) Pyrometric Temperature Measurement on Solar Thermal High Temperature Receivers. Journal of Solar Energy Engineering, 128 (3), pp. 285-292.

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Official URL: http://scitation.aip.org/ASMEJournals/Solar/


The knowledge of the absorber surface temperature distribution is essential for efficient operation and further development of solar thermal high temperature receivers. However, the concentrated solar radiation makes it difficult to determine the temperature on irradiated surfaces. Contact thermometry is not appropriate and pyrometric measurements are distorted by the reflected solar radiation. The measurement in solar-blind spectral ranges offers a possible solution by eliminating the reflected solar radiation from the measurement signal. The paper shows that besides the incoming solar radiation and the absorber emittance, the bi-directional reflection properties and the temperature of the object are determining for the required selectivity of the spectral filter. Atmospheric absorption affects the solar blind pyrometric measurements in absorption bands of CO2 and water vapor. The deviation of temperature measurement due to atmospheric absorption is quantified and the possibilities and limitations of accounting for the atmospheric absorption with models based on radiation transfer calculations are discussed.

Document Type:Article
Title:Pyrometric Temperature Measurement on Solar Thermal High Temperature Receivers
AuthorsInstitution or Email of Authors
Pfänder, MarkusUNSPECIFIED
Lüpfert, EckhardUNSPECIFIED
Date:August 2006
Journal or Publication Title:Journal of Solar Energy Engineering
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 285-292
Keywords:solar blind, pyrometric temperature measurement, solar thermal, high temperature, atmospheric absorption
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
Deposited By: Markus Pfänder
Deposited On:21 Aug 2006
Last Modified:27 Apr 2009 13:01

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