Energy saving using morning and evening civil twilight in the State of Bahrain

W.E. Alnaser

Renewable Energy, 1994, vol. 5, issue 5, 1547-1552

Abstract: Comparison between the total solar irradiation including and excluding the civil twilight in Bahrain is studied. The solar intensity of the civil twilight (morning and evening twilight) in Bahrain is calculated. The calculations show that the maximum civil twilight is on summer solistice (longest day) lasts for 52.3 min and the least on winter solistice (shortest day) for 50.7 min. In spring and autumn equinox (day equal to night), the duration of the civil twilight is 46.1 min. Monteith and Unsoworth equation [7] which estimates the daily global insolation for location having unprolonged dusk and dawn was evaluated for Bahrain. Their equation was found to fit very well with the measured data in Bahrain (percentage difference of 6.5%).

Date: 1994
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:5:y:1994:i:5:p:1547-1552

DOI: 10.1016/0960-1481(94)90206-2

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