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TECHNICAL PAPERS

Experimentally Determined Optical Properties of a Polydisperse Carbon Black Cloud for a Solar Particle Receiver

[+] Author and Article Information
Rudi Bertocchi, Abraham Kribus, Jacob Karni

Environmental Sciences and Energy Research Dept., Weizmann Institute of Science, Rehovot 76100, Israel

J. Sol. Energy Eng 126(3), 833-841 (Jul 19, 2004) (9 pages) doi:10.1115/1.1756924 History: Received September 01, 2003; Revised March 01, 2004; Online July 19, 2004
Copyright © 2004 by ASME
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References

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Hunt, A. J., 1979, “A New Solar Receiver Utilizing a Small Particle Heat Exchanger,” 4 Int. Soc. Energy Conversion Engrg. Conf., 1 , pp. 159–163.
Hunt, A. J., and Brown, C. T., 1983, “Solar Test Results of an Advanced Direct Absorption High Temperature Gas Receiver (SPHER),” 8 Solar World Congress, Szokolay, S. V., Ed., Pergamon, 2 , pp. 959–963.
Bertocchi, R., Karni, J., and Kribus, A., In Press, “Experimental Evaluation of a Non-Isothermal High Temperature Solar Particle Receiver,” Energy—The International Journal.
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van de Hulst, H. C., 1957, Light Scattering by Small Particles, Wiley, New York.
Kocifaj,  M., and Lukac,  J., 1998, “Using the Multiple Scattering Theory for Calculation of the Radiation Fluxes from Experimental Aerosol Data,” J. Quant. Spectrosc. Radiat. Transf., 60, pp. 933–942.
Erickson,  W. D., Williams,  G. C., and Hottel,  H. C., 1964, “Light Scattering Measurements on Soot in a Benzene-Air Flame,” Combust. Flame, 8, pp. 127–132.
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Figures

Grahic Jump Location
Schematic of Apparatus for Particle Cloud Generation System
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SEM micrograph of a two-hour old Carbon particle cloud at magnification 2000. β=0.62 m−1 at 1064 nm. Inset shows magnification of 10,000.
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Normalized particle population distribution of two particle clouds, β=1.55 m−1 and β=0.62 m−1 at 1064 nm. The distribution is a composite of scans at magnifications of 10,000, 2000 and 500.
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Experimental apparatus for measurement of optical properties
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Linear extinction coefficient vs. particle mass loading at λ=532 nm. The number density at a mass loading of 1 g/m3 is 1.5⋅1014 particles, and Ke=8.25
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Measured and predicted scattering phase function at 532 nm and 1064 nm. Mie theory results are based on the full particle population distribution, including agglomerates. Error bars represent 95% confidence. (a) 532 nm parallel polarization. (b) 532 nm perpendicular polarization. (c) 1064 nm parallel polarization. (d) 1064 nm perpendicular polarization.
Grahic Jump Location
Effect of the agglomerates on the scattering phase function for perpendicular polarization, β=1.0 m−1. The full particle population distribution includes agglomerates, and the truncated distribution includes primary particles only (diameter less than 1 μm).
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Spectral dependence of phase function for perpendicular polarization at β=0.90 m−1.
Grahic Jump Location
Spectral dependence of the scattering albedo at single scattering conditions. Error bars represent 95% confidence. Data for acetylene is from 1922. Data for toluene is from 22.

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