Modeling Solar Radiation at the Earth’s Surface

Frequency Distribution and Distribution Types for Clear Day Irradiation Index

The frequency distribution type for each monthly Kc database was determined based upon their respective skewness and kurtosis values. It was observed that January, February, March and December are classified as Type IV distribution, whereas the remaining months are classified as Type V distributions, the most preferred distri­bution types with regard to solar energy conversion systems. The frequency distri­bution data for January (type IV) and July (type V) are shown in Figs. 4.7 and 4.8, respectively.

Fig. 4.7 Frequency distribution of Kc for January - type IV

Modeling Solar Radiation at the Earth’s Surface

Quality Assessment Based Upon Comparison with Models

Many models based on the physics of radiation transfer through the clear atmo­sphere have been developed (Lacis and Hansen 1974; Atwater and Ball 1978; Hoyt 1978; Bird and Hulstrom 1981a, …

Solar Horizontal Diffuse and Beam Irradiation on Clear Days

There exist a number of models to determine the solar horizontal diffuse irradia­tion on a clear day (Kondratyev 1969) but they are complex and have very stringent conditions. Similarly, there …


Reading the twenty chapters of this book caused me mixed reactions, though all were positive. My responses were shaped by several factors. Although I have main­tained a “watching brief’ on …

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