Determination of Direct Normal Solar Radiation From Measured Global Values—Comparison of Models

[+] Author and Article Information
W. D. Turner

Department of Mechanical Engineering, Texas A&M University, College Station, Texas 77843

A. M. Mujahid

Mechanical Engineering Department, Riyadh University, Riyadh, Saudi Arabia

J. Sol. Energy Eng 107(1), 39-44 (Feb 01, 1985) (6 pages) doi:10.1115/1.3267651 History: Received January 01, 1984; Online November 11, 2009


The modeling of direct normal solar radiation from measured global solar radiation is discussed and a new direct normal model developed from the Mississippi County Community College solar monitoring station at Blytheville, Ark., is presented. Comparisons of several existing models, including the Aerospace model developed by Randall and Whitson, are made. The Blytheville model and the Aerospace model are compared using five recent solar radiation data bases. The Aerospace model proved to be superior to all the models for the data bases used; however, the Blytheville model was only slightly less accurate and much easier to use. The Blytheville model predicted the beam radiation accurately for several widely varying climatic locations.

Copyright © 1985 by ASME
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