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TECHNICAL PAPERS

Representative Terrestrial Solar Brightness Profiles

[+] Author and Article Information
Andreas Neumann, Andreas Witzke

German Aerospace Center (DLR), Cologne, Germany

Scott A. Jones

Sandia National Laboratories, Albuquerque, NM

Gregor Schmitt

Institute of Physics, University of Bonn, Bonn, Germany

J. Sol. Energy Eng 124(2), 198-204 (Apr 24, 2002) (7 pages) doi:10.1115/1.1464880 History: Received November 01, 2001; Revised January 01, 2002; Online April 24, 2002
Copyright © 2002 by ASME
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References

Goody, R. M., and Yung, Y. L., 1989, Atmospheric Radiation, Oxford University Press, ISBN 0-19-505134-3.
Biggs F., and Vittitoe, C. N., 1979, “The Helios Model for the Optical Behavior of Reflecting Solar Concentrators,” SAND 76-0347, Sandia.
Rabl,  A., and Bendt,  P., 1982, “Effect of Circumsolar Radiation on Performance of Focusing Collectors,” J. of Sol. Energy Eng., 104, pp. 237–250.
Schubnell,  M., 1992, “Sunshape and its Influence on the Flux Distribution in Imaging Concentrators,” Sol. Energy Eng., 114, pp. 260.
Neumann,  A., and Witzke,  A., 1999, “The Influence of Sunshape on the DLR Solar Furnace Beam,” Sol. Energy, 66(6), pp. 447–457.
Jeys,  T. H., and Vant-Hull,  L. L., 1976, “The Contribution of the Solar Aureole to the Measurements of Pyrheliometers,” Sol. Energy, 18, pp. 343–348.
Angstrom, A., and Rodhe, B., 1922, “Pyrheliometric Measurements with Special Regard to the Circumsolar Sky Radiation,” Tellus, XVIII (1) 1966, pp. 25–33.
Hoyt, D. V., 1978, “Pyrheliometric and Circumsolar Sky Radiation Measurements by the Smithsonian Astrophysical Observatory, from 1923 to 1954,” Tellus.
Dellin, T., Fisk, M. J., and Yang, C. L., 1981, “A User’s Manual for DELSOL2–A Computer Code for Calculating the Optical System Design for Solar Thermal Central Receiver Plants,” SAND81-837, Sandia National Laboratories, Livermore, CA.
Schöffel, U., and Sizmann, R., 1991, “Final Report Terminal Concentrators. In Solar Thermal Energy Utilization,” ISBN 3-53268-4, Springer Berlin, Vol. 4, pp. 183–219.
Minnaert, M., 1953, “The Photosphere,” The Sun, The Solar System I, G. P. Kuiper (ed.), University of Chicago Press, Chicago, IL.
Neumann, A., and von der Au, B., 1997, “Sunshape Measurements at the DLR Solar Furnace Site in Cologne, Germany,” Proc. of Int. Solar Energy Conf., Washington D.C., ISBN 0791815552, pp. 163–170.
Watt, A. D., 1980, “Circumsolar Radiation,” SAND80-7009, Sandia National Laboratories, Albuquerque, NM.
Grether, D., Nelson J., and Wahlig, M., 1975, “Measurement of Circumsolar Radiation,” Progress Report NSF/RANN/SE/AG-536/PR/74/4, Lawrence Berkeley Laboratory.
Hunt, A., Grether, D. F., and Wahlig, M., 1976, “Results from Circumsolar Radiation Measurements,” Joint Conf. ISES, Winnipeg, Canada.
Noring, J. E., Grether, D. F., and Hunt, A. J., 1991, “Circumsolar Radiation Data: The Lawrence Berkeley Laboratory Reduced Data Base, Final Subcontract Report,” NREL/TP-262-4429, National Renewable Energy Laboratory (NREL).
Angstrom,  A., 1961, “Radiation to Actinometric Receivers in Its Dependence on Aperture Conditions,” Tellus, XIII(3), pp. 425–431.
Abbot,  C. G., 1922, “Results of the Measurements of the Intensity of Solar Radiation,” Ch. IV, Annals of the Astrophysical Observatory of the Smithsonian Inst., 4, pp. 193–195.
Angstrom,  A., 1974, “Circumsolar Sky Radiation and Turbidity of the Atmosphere,” Appl. Opt., 12(3), pp. 474–477.
Eiden,  R., 1968, “Calculations and Measurements of the Spectral Radiance of the Solar Aureole,” Tellus, XX(3), pp. 380–398.
Robertson, G. E., and Banker, J. H., 1974, “A Photographic Technique to Determine the Apparent Energy Distribution of the Solar Aureole,” SLA-740090, Sandia National Laboratories, Albuquerque, NM.
Neumann,  A., and Groer,  U., 1996, “Experimenting with Concentrated Sunlight Using the DLR Solar Furnace,” Sol. Energy, 58(4–6), pp. 180–190.
Neumann, A., von der Au, B., and Heller, P., 1998, “Measurement of Circumsolar Radiation at the Plataforma Solar (Spain) and at DLR (Germany),” Proc. of Int. Solar Energy Conf. Solar Engineering 1998, ASME, Albuquerque, ISBN 0-7918-1856-X, pp. 429–438.
Hunt, A., Grether, D., and Wahlig, M., 1978, “Circumsolar Radiation Data for Central Receiver Simulation,” LBL-8371, Lawrence Berkeley Laboratory, Berkeley, CA.

Figures

Grahic Jump Location
(a) Comparison of the limb darkened sun (known as the Kuiper model 2), a LBL 0.3% CSR profile, and a low CSR DLR profile (0.37%) generated out of a camera image. As each symbol represents a scan point one sees that the spacing of the DLR data is lower compared to the LBL data. Similarly, (b) comparison of the limb darkened sun, a LBL 0.3% CSR profile, and a DLR 0.37% CSR profile. Here we have a linear intensity scaling and a zoomed radius axis, which gives a look at the details of the solar limb.
Grahic Jump Location
A comparison of the single DLR profile with the standard solar scan as published by 3
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Scatter plot of CSR measurements at Cologne versus the DNI in the years 1997–1999. A two-fold scattering is visible and low CSRs may also occur at low DNI.
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Frequency of occurrence of the CSR. 71.5% of the measurements are in the 0–5% CSR zone
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Subdividing the CSR measurements into DNI bins shows that low CSR may occur all over the DNI range. CSR values of >35% dominate in the 0–200 W/m2 region.
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The impact of the assumed sun radius on the calculation of the CSR. A nominal 3% profile can display a CSR of 6% if 4.5 mrad is used instead of 4.65. If 4.9 mrad is used the CSR decreases to 0.6%.
Grahic Jump Location
These mean profiles are taken from DLR data at different locations at approximately 10% CSR and compared to averaged LBL 11% CSR data from Barstow. The profiles are comparable within the confidence limits.
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A comparison of several LBL sunshape scans covering a wide range of CSR conditions
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A comparison of the DLR averaged sunshape profiles

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