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TECHNICAL PAPERS

A New Method for Correcting Shadow Band Diffuse Irradiance Data

[+] Author and Article Information
T. Muneer, X. Zhang

School of Engineering, Napier University, 10 Colinton Road, Edinburgh EH10 5DT, UK

J. Sol. Energy Eng 124(1), 34-43 (Mar 01, 2001) (10 pages) doi:10.1115/1.1435647 History: Received October 01, 2000; Revised March 01, 2001
Copyright © 2002 by ASME
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References

Drummond,  A. J., 1956, “On the Measurement of Sky Radiation,” Arch. Meteorol., Geophys. Bioklimatol., Ser. A, 7, pp. 413–436.
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Painter,  H. E., 1981, “The Shade Ring Correction for Diffuse Irradiation Measurements,” Sol. Energy, 26, p. 361.
Vartiainen,  E., 1998, “An Anisotropic Shadow Ring Correction Method for the Horizontal Diffuse Irradiance Measurements,” Renewable Energy, 17, pp. 311–317.
Ineichen,  P., Gremaud,  J. M., Guisan,  O., and Mermoud,  A., 1984, “Study of the Corrective Factor Involved when Measuring the Diffuse Solar Radiation by Using the Ring Method,” Sol. Energy, 32, p. 585.
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Figures

Grahic Jump Location
Comparison of the range of diffuse irradiance correction factor given by Drummond’s method and actual results
Grahic Jump Location
Scatter plot of true diffuse irradiance versus corrected irradiance using the proposed (top) and Drummond’s model (bottom)—Bracknell data
Grahic Jump Location
Proposed model’s error histogram under a) all-sky, b) heavy overcast (0<kt≤0.2),c) part-overcast (0.2<kt≤0.6), and d) clear-sky (0.6<kt<1)—Bracknell data
Grahic Jump Location
Drummond model’s error histogram under a) all-sky, b) heavy overcast (0<kt≤0.2),c) part-overcast (0.2<kt≤0.6), and d) clear-sky (0.6<kt<1)—Bracknell data
Grahic Jump Location
Scatter plot of true diffuse irradiance versus corrected irradiance using the proposed (top) and Drummond’s model (bottom)—Beer Sheva data
Grahic Jump Location
Proposed model’s error histogram under a) all-sky, b) heavy overcast (0<kt≤0.2),c) part-overcast (0.2<kt≤0.6), and d) clear-sky (0.6<kt<1)—Beer Sheva data
Grahic Jump Location
Drummond model’s error histogram under a) all-sky, b) heavy overcast (0<kt≤0.2),c) part-overcast (0.2<kt≤0.6), and d) clear-sky (0.6<kt<1)—Beer Sheva data

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