Preprint Article Version 2 This version is not peer-reviewed

Models for Calculating Monthly Average Solar Radiation from Air Temperature in Swaziland

Version 1 : Received: 13 December 2016 / Approved: 13 December 2016 / Online: 13 December 2016 (10:06:35 CET)
Version 2 : Received: 6 November 2017 / Approved: 6 November 2017 / Online: 6 November 2017 (12:02:45 CET)

A peer-reviewed article of this Preprint also exists.

Dlamini, M.D.; Varkey, A.J.; Mkhonta, S.K. Models for Calculating Monthly Average Solar Radiation from Air Temperature in Swaziland. Int. J. Phys. Sci. 2017, 12, 247–254. Dlamini, M.D.; Varkey, A.J.; Mkhonta, S.K. Models for Calculating Monthly Average Solar Radiation from Air Temperature in Swaziland. Int. J. Phys. Sci. 2017, 12, 247–254.

Journal reference: International Journal of Physical Sciences 2017, 12, 247-254
DOI: 10.5897/IJPS2017.4679

Abstract

Solar radiation is the main energy source for mankind and an accurate data of solar radiation levels for a particular location is vital for the optimum operation of solar energy transducers such as photovoltaic cells and solar thermal collectors. In this work, we show that there is a linear relationship between recorded monthly average temperatures and solar radiation in Swaziland. The correlation can be utilized to develop two mathematical models for the estimation of solar radiation: one from the measured monthly average temperatures and the other based on the square-root of the difference between measured maximum and minimum monthly average temperatures.  Both models fit the data well and can be applied to estimate solar radiation in other parts of the region.

Subject Areas

solar energy; solar radiation; climatic data; solar radiation estimation

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