Temperature measurements of the gas phase surrounding the hot front during material processing at the focus of a high concentration solar furnace can be achieved by coupled emission and absorption optical spectroscopy. The emitted light results from a fluorescence phenomenon of some vapor species from the heated sample excited by absorption of the incident concentrated beam. Absorption measurements were performed on these same species with a reference beam using the sun radiation as source. These coupled techniques led to consistent results and suggested the existence of a nonequilibrium Knudsen layer near the vaporizing surface. In this paper, we report measurements performed on YO diatomic molecule issuing from a melted sample of yttrium oxide.
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November 2007
Research Papers
Gas Temperature Measurements in High Concentration Solar Furnace Environments: Evidence of Nonequilibrium Effects
J. M. Badie,
J. M. Badie
PROMES-CNRS
, 7 rue du Four Solaire, 66120 Odeillo, France
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L. Cassan,
L. Cassan
PROMES-CNRS
, 7 rue du Four Solaire, 66120 Odeillo, France
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B. Granier,
B. Granier
PROMES-CNRS
, 7 rue du Four Solaire, 66120 Odeillo, France
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S. Agudelo Florez,
S. Agudelo Florez
Universidad de Antioquia
, Apartado Aéreo 1226, Medellín, Colombia
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F. Chejne Janna
F. Chejne Janna
Universidad Nacional de Colombia
, Apartado Aéreo 1027, Sede Medellín, Colombia
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J. M. Badie
PROMES-CNRS
, 7 rue du Four Solaire, 66120 Odeillo, France
L. Cassan
PROMES-CNRS
, 7 rue du Four Solaire, 66120 Odeillo, France
B. Granier
PROMES-CNRS
, 7 rue du Four Solaire, 66120 Odeillo, France
S. Agudelo Florez
Universidad de Antioquia
, Apartado Aéreo 1226, Medellín, Colombia
F. Chejne Janna
Universidad Nacional de Colombia
, Apartado Aéreo 1027, Sede Medellín, ColombiaJ. Sol. Energy Eng. Nov 2007, 129(4): 412-415 (4 pages)
Published Online: March 20, 2007
Article history
Received:
March 20, 2006
Revised:
March 20, 2007
Citation
Badie, J. M., Cassan, L., Granier, B., Agudelo Florez, S., and Chejne Janna, F. (March 20, 2007). "Gas Temperature Measurements in High Concentration Solar Furnace Environments: Evidence of Nonequilibrium Effects." ASME. J. Sol. Energy Eng. November 2007; 129(4): 412–415. https://doi.org/10.1115/1.2769718
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