MATHEMATICAL MODEL FOR THE TOTAL SOLAR RADIATION DETERMINATION AT THE SOIL LEVEL

Abstract

In one minute the sun produces enough energy to cover the annual energy needs worldwide, and one day produce as much energy as energy demand worldwide for a period of 27 years. Sun has a radius equal to 695,000 km and a volume of 1.42 ∙ 1018 km3 and develop space, the reaction thermonuclear transformation of hydrogen into helium, a radiant energy flux of 8.8 ∙ 1025 cal / sec. The mathematical model presented in this paper takes into account all these parameters, less than the quantity of vapor and dust in the atmosphere that has a random evolution. The mathematical model developed for the determination anytime and anywhere in the world for the next values and parameters: apparent solar time, solar declination, solar azimuth and incidence angle, angle of sun elevation, solar declination, solar constant, solar flux density, diffuse solar radiation, global radiation, soil albedo, total radiant flux density and relational links of these values.