The study introduces a new regression model developed to estimate the hourly values of
diffuse solar radiation at the surface. The model is based on the clearness index and diffuse …

Accurate information about the available solar radiation is a key factor in designing efficient
photovoltaic systems. In general, the meteorological stations measure global solar …

All solar energy applications require readily available, site-oriented and long-term solar
radiation data. A typical database comprises of global, direct and diffuse solar irradiance …

Accessibility to the accurate knowledge of diffuse solar radiation is a fundamental
prerequisite for designing and monitoring the solar energy technologies. Nevertheless, the …

In many solar applications knowing diffuse solar radiation on horizontal surface represents
an important requirement. The measurement of diffuse radiation is quite expensive, and …

Diffuse solar radiation data are very required for many solar energy applications. The main
objective of the present study is to establish new empirical models for predicting the monthly …

For some locations both global and diffuse solar radiation are measured. However, for many
locations, only global radiation is measured, or inferred from satellite data. For modelling …

Solar irradiation data is required in many applications to obtain the solar energy output.
However, solar irradiation data is not always available, especially horizontal surface diffuse …

Measured hourly solar radiation and cloud cover data were analysed. Regression analysis
techniques were used to correlate the monthly-average-daily and monthly-average-hourly …

In solar energy applications, diffuse solar radiation component is required. Solar radiation
data particularly in terms of diffuse component are not readily affordable, because of high …