Grey model of direct solar radiation intensity on the horizontal plane for cooling loads calculation

摘要

According to the tenets of Grey System Theory, this papr analyzes the stochastic characteristics of the attenuation rate of solar radiation intensity, and then presents a grey model for dirct solar radiation on the horizontal plane on sunny days. By combining the definitive physical modl withthe grey paramter, this grey model describes the attenuation pattern of solar radiation intensity more comprehensively and more reasonably.