Some comments on time variation in solar radiation over Baghdad, Iraq

M. Al-Riahi and A. Al-Kayssi

Renewable Energy, 1998, vol. 14, issue 1, 479-484

Abstract: In the present work an attempt was made to study and examine some aspects of radiation climatology which are important in solar energy utilization. The yearly cumulative global radiation for Baghdad is 216 MJ/m2 per year, while the annual total of daily diffuse radiation at Baghdad is about 70.82 MJ/m2. The mean monthly values of clearness index KT present a maximum of 65.9% in August and a minimum value of 48.4% in January. The annual mean of daily global radiation and its spectral OG1, RG2 and RG8 at Baghdad is about, 18.03, 13.53, 10.86 and 9.36 MJ/m2, respectively. Over the year, the highest UV radiation were received during June and July (243 Wh/m2) and the lowest in December (79 Wh/m2). Furthermore, UV radiation constituted on average 3.25% of global radiation.

Keywords: Global and diffuse radiation; Solar radiation transmission; UV radiation; Spectral radiation (search for similar items in EconPapers)
Date: 1998
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Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:14:y:1998:i:1:p:479-484

DOI: 10.1016/S0960-1481(98)00107-4

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