Estimation of the direct beam from seasonal correlations

A. Rerhrhaye, M. Zehaf and J. Flechon

Renewable Energy, 1995, vol. 6, issue 7, 779-785

Abstract: In order to reduce residual differences between measured values of the direct beam and values estimated from the coefficients σ and Kt when a single annual correlation expression is used, we have divided the year into three periods according to the sunset hour angle, ωs at our site: winter; spring/autumn; and summer. Expressions of correlation have been derived for each of these three periods. Use of three seasonal expressions gives a more accurate estimate than does a single annual expression.

Date: 1995
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:6:y:1995:i:7:p:779-785

DOI: 10.1016/0960-1481(95)00006-6

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