Solar radiation over Egypt: Comparison of predicted and measured meteorological data

Journal Article · Tue Jun 01 00:00:00 EDT 1993 · Solar Energy (Journal of Solar Energy Science and Engineering); (United States)

DOI:https://doi.org/10.1016/0038-092X(93)90106-X· OSTI ID:6224419

Kamel, M A; Shalaby, S A; Mostafa, S S ^[1]

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1. Ain Shams Univ., Cairo (Egypt)

Measurements of global solar irradiance on a horizontal surface at five meteorological stations in Egypt for three years 1987, 1988, and 1989 are compared with their corresponding values computed by two independent methods. The first method is based on the Angstrom formula, which correlates relative solar irradiance H/H[sub o] to corresponding relative duration of bright sunshine n/N. Regional regression coefficients are obtained and used for prediction of global solar irradiance. Good agreement with measurements is obtained. In the second method an empirical relation, in which sunshine duration and the noon altitude of the sun as inputs together with appropriate choice of zone parameters, is employed. This gives good agreement with the measurements. Comparison shows that the first method gives better fitting with the experimental data.

• OSTI ID: 6224419
• Journal Information: Solar Energy (Journal of Solar Energy Science and Engineering); (United States), Journal Name: Solar Energy (Journal of Solar Energy Science and Engineering); (United States) Vol. 50:6; ISSN SRENA4; ISSN 0038-092X
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140100* -- Solar Energy-- Resources & Availability
ACCURACY
AFRICA
ARAB COUNTRIES
AZIMUTH
CLOUD COVER
DEVELOPING COUNTRIES
DIAGRAMS
EGYPTIAN ARAB REPUBLIC
EQUATIONS
INSOLATION
MATHEMATICAL MODELS
MIDDLE EAST
NUMERICAL SOLUTION
PERFORMANCE TESTING
RADIATIONS
SOLAR RADIATION
STELLAR RADIATION
SUN CHARTS
TESTING