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TECHNICAL PAPERS

Analysis and Experimental Results of Solar-Blind Temperature Measurements in Solar Furnaces

[+] Author and Article Information
D. Hernandez, G. Olalde, J. M. Gineste

Institut de Science et de Génie des Matériaux et Procédés, Font-Romeu, France

C. Gueymard

Solar Consulting Services, Bailey, CO, USA

J. Sol. Energy Eng 126(1), 645-653 (Feb 12, 2004) (9 pages) doi:10.1115/1.1636191 History: Received January 01, 2003; Revised May 01, 2003; Online February 12, 2004
Copyright © 2004 by ASME
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References

Figures

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Schematic diagram of the experimental setup
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Mirror’s spectral reflectance R(λ) and typical Solar Performance Factor η(λ) for the installation
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Solar radiance spectra. (E) Exoatmospheric; (T) Terrestrial.
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Atmospheric absorption bands in the infrared spectrum
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Spectral solar radiance (left Y axis) and filter transmittance (right Y axis) for the narrow absorption bands. Numbers give the key to the filters listed in Tables 1 and 2. (E) Exoatmospheric (T) Terrestrial.
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Spectral solar radiance (left Y axis) and filter transmittance (right Y axis) for the larger absorption bands. Numbers give the key to the filters listed in Tables 1 and 2. (E) Exoatmospheric; (T) Terrestrial.
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Spectral solar radiance (left Y axis) and transmittance (right Y axis) for the filter (#10) used under blackbody conditions. (E) Exoatmospheric; (T) Terrestrial.
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Diffuse plane copper surface
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Spectral reflectivity of copper 20
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BRDF for copper at 0.831 μm: (1) Measurements; (2) Lambert’s cosine law.
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Reflected solar flux for the copper target: (1) + symbols, diffuse surface; (2) × symbols, specular surface
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Radiance measurement in the 8–12 μm band: (1) Without solar irradiance; (2) With solar irradiance; (3) With supplementary cutting quartz filter
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Temperature errors versus apparent temperature calculated for the different working filters used here and for a diffusely reflecting sample with an emissivity of 0.8
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Measured spectral emissivity of Al2O3 at 2087°C 22
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Rotating reactor for alumina and photo of a cavity
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Radiance temperature measurements for Al2O3 freezing plateau. (a) λ=1.6 μm; (b) Δλ=8–12 μm.

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