We developed a method that enables one to correct solar blind pyrometer cavity temperature measurements for the system-sensor reflection error. The method is valid for measurements made on diffusely emitting and reflecting cavity surfaces when there is no participating medium between the pyrometer and the surface of interest. The surfaces’ emissivities must be known. The procedure gives the uncertainty interval associated with the correction. The procedure was validated by measuring surface temperatures in a solar reactor insulated with Yttria-stabilized Zirconia felt receiving concentrated solar radiation. The temperature range of the experimental study was from 1100–1600 K. Temperature measurements made with a pyrometer having a narrow band filter centered at 1.398 μm were compared to temperatures measured with Zirconia felt shielded thermocouples. Uncorrected pyrometer measurements differed from the thermocouple measurements by as much as 350 K. The thermocouple measurements mostly fell within the system-sensor uncertainty interval of the corrected temperature measurements. The uncertainty interval depends both on the number of surfaces probed with the pyrometer and the nature of the solar blind filter. A numerical simulation study showed that a UV filter centered at a wavelength near 0.285 μm gives tighter system-sensor uncertainty intervals than an IR filter centered at 1.398 μm.
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February 2005
Technical Papers
Solar Blind Pyrometer Temperature Measurements in High Temperature Solar Thermal Reactors: A Method for Correcting the System-Sensor Cavity Reflection Error
Aaron P. Freid,
Aaron P. Freid
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, USA
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Paul K. Johnson,
Paul K. Johnson
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, USA
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Manuela Musella,
Manuela Musella
Solar Technology Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
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Reto Mu¨ller,
Reto Mu¨ller
Solar Technology Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
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Julie E. Steinbrenner,
Julie E. Steinbrenner
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, USA
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Robert D. Palumbo
Robert D. Palumbo
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, and Solar Technology Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
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Aaron P. Freid
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, USA
Paul K. Johnson
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, USA
Manuela Musella
Solar Technology Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
Reto Mu¨ller
Solar Technology Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
Julie E. Steinbrenner
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, USA
Robert D. Palumbo
Mechanical Engineering Department, Valparaiso University, Valparaiso, IN 46383, and Solar Technology Laboratory, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland
Contributed by the Solar Energy Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the ASME Solar Division March 16, 2004; revision received June 24, 2004. Associate Editor: R. Pitz-Paal.
J. Sol. Energy Eng. Feb 2005, 127(1): 86-93 (8 pages)
Published Online: February 7, 2005
Article history
Received:
March 16, 2004
Revised:
June 24, 2004
Online:
February 7, 2005
Citation
Freid , A. P., Johnson, P. K., Musella , M., Mu¨ller, R., Steinbrenner, J. E., and Palumbo, R. D. (February 7, 2005). "Solar Blind Pyrometer Temperature Measurements in High Temperature Solar Thermal Reactors: A Method for Correcting the System-Sensor Cavity Reflection Error ." ASME. J. Sol. Energy Eng. February 2005; 127(1): 86–93. https://doi.org/10.1115/1.1796992
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