Calculation and Analysis of Total Quantity of Solar Radiation Incident on the Horizontal Surface of Babylon

Abstract

This study includes mathematical methods to calculate the total amount of solar radiation falling on the horizontal surface of the city of Hilla, for the unit of area, which can be applied on the ground in order to use photo voltage cells for the electrical energy needed to feed the required loads, weather data have been relied on  temperature, relative humidity, dust and clouds for the period from 1/9/2012 to 05/01/2013 which taken from the Meteorological station of Education College for Pure Sciences - University of Babylon, as well as data from the Meteorological station of Sciences College - University of Babylon for the period from 1/5/2012 to 01/09/2012 located on longitude (44.401^o) and width (32.4^o), which have a direct impact on the angle of the fall of the solar radiation. The results showed that the amount of solar radiation calculated theoretically for the city of Hilla per m² was the reality within the range 0-945 W / m².

The study also proved that weathering has a direct impact on the amount of solar radiation measured through decreasing it by the processes of absorption and scattering depending on the diameter of particles, dust and water vapor (the amount of relative humidity) in the air and the type and thickness and height of the clouds.