Abstract
In this paper solar radiation was studied over a region of Baghdad (Latitude 33.3o and longitude 44.4o). The two parts of global solar radiation: diffuse and direct solar radiation were estimated depending on the clearance index of measured data (Average Monthly mean global solar radiation). Metrological data of measured (average monthly mean diffuse and direct solar radiation) were used to comparison the results and show the agreement between them. Results are determined by applying Liu and Jordan two models (1960). Excel 2007program is used in calculation, graphics and comparison the results.
Highlights
The radiation from the sun is the primary natural energy source of the planet Earth
When the spoken is of solar radiation, It means the electromagnetic radiation of the Sun
Two models were applied to Baghdad to estimate the diffuse and direct solar radiation: 3.1 Liu and Jordan model was applied on Baghdad city in this work (because Baghdad city is located at the latitude (33.34o), in the range of the Latitude of the world locations that the model was applied in
Summary
The radiation from the sun is the primary natural energy source of the planet Earth. Other natural energy sources are the cosmic radiation, the natural terrestrial radioactivity and the geothermal heat flux from the interior to the surface of the Earth, but these sources are energetically negligible as compared to solar radiation. When the spoken is of solar radiation, It means the electromagnetic radiation of the Sun. The energy distribution of electromagnetic radiation over different wavelength is called Spectrum. The quantity of solar radiation reaching the earth's surface varies dramatically as a function of changing atmospheric condition as well as the changing position of the sun through the day [2]. Solar radiation received at the surface is of primary importance for the purpose of building solar energy devices, estimating crop productivity, etc. Direct measuring is not available in many cases, so numerical technique becomes aneffective alternative to estimate global radiation through observed meteorological data
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