A new correlation between solar energy radiation and some atmospheric parameters

TL;DR

This paper establishes a new linear correlation between daily solar radiation and atmospheric parameters, demonstrating comparable accuracy to existing models in Mediterranean climates.

Contribution

It introduces a novel linear relationship linking solar radiation with sunshine hours and temperature variation, validated against historical datasets.

Findings

The new model achieves accuracy comparable to established models.

Validation performed with historical datasets from Mediterranean sites.

The relationship simplifies solar radiation estimation using readily available parameters.

Abstract

The energy balance for an atmospheric layer near the soil is evaluated. By integrating it over the whole day period a linear relationship between the global daily solar radiation incident on a horizontal surface and the product of the sunshine hours at clear sky with the maximum temperature variation in the day is achieved. The results show a comparable accuracy with some well recognized solar energy models such as the \ang-Prescott one, at least for Mediterranean climatic area. Validation of the result has been performed using old dataset which are almost contemporary and relative to the same sites with the ones used for comparison.