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Turkish Journal of Physics

Abstract

This paper presents the horizontal solar radiation data for Osmaniye (37◦04′N, 36◦22′E), located in Mediterranean region of Türkiye, over the period 2014–2023. Solar radiation variability, recorded at 1-min intervals, was evaluated in terms of hourly, daily, monthly, seasonal, and annual averages. Over the 10-year periods, the mean daily total and daily average global radiations received on a horizontal surface were 1,360,000 W/m2 and 371.47 W/m2, respectively. The monthly averaged daily global radiation (averaged over the 10-year period) ranged from 202.94 W/m2 in December to 496.86 W/m2 in July. The seasonal average values of solar radiations were 452.14 W/m2 in summer, 394.40 W/m2 in autumn, 353.19 W/m2 in spring, and 202.51 W/m2 in winter. The annual average clearness index ranged from 0.43 in December to 0.61 in June, with an overall mean of 0.55. In addition, the present measurements were compared with the NASA solar energy model based on a 36-year average (1987–2022). The performance between present measurement and the NASA data was evaluated using statistical metrics (R2, RMSE, MBE, and t-statistic), yielding values of 98.77%, 29.41 W/m2 20.15 W/m2, and 3.12, respectively. The measured data are generally consistent with the NASA data, with some discrepancies. Overall, the results indicate that Osmaniye Province, located on the Mediterranean coast of Türkiye, receives abundant solar radiation and therefore has strong potential for solar energy development.   This paper presents the horizontal solar radiation data for Osmaniye (37◦04′N, 36◦22′E), located in Mediterranean region of Türkiye, over the period 2014–2023. Solar radiation variability, recorded at 1-min intervals, was evaluated in terms of hourly, daily, monthly, seasonal, and annual averages. Over the 10-year periods, the mean daily total and daily average global radiations received on a horizontal surface were 1,360,000 W/m2 and 371.47 W/m2, respectively. The monthly averaged daily global radiation (averaged over the 10-year period) ranged from 202.94 W/m2 in December to 496.86 W/m2 in July. The seasonal average values of solar radiations were 452.14 W/m2 in summer, 394.40 W/m2 in autumn, 353.19 W/m2 in spring, and 202.51 W/m2 in winter. The annual average clearness index ranged from 0.43 in December to 0.61 in June, with an overall mean of 0.55. In addition, the present measurements were compared with the NASA solar energy model based on a 36-year average (1987–2022). The performance between present measurement and the NASA data was evaluated using statistical metrics (R2, RMSE, MBE, and t-statistic), yielding values of 98.77%, 29.41 W/m2 20.15 W/m2, and 3.12, respectively. The measured data are generally consistent with the NASA data, with some discrepancies. Overall, the results indicate that Osmaniye Province, located on the Mediterranean coast of Türkiye, receives abundant solar radiation and therefore has strong potential for solar energy development.

Author ORCID Identifier

MUHİTTİN ŞAHAN: 0000-0001-6120-9682

HALİDE ŞAHAN: 0000-0002-6223-6807

RAMAZAN KAYA: 0000-0003-3150-8037

DOI

10.55730/1300-0101.2808

Keywords

Global solar radiation, pyranometer, solar energy, NASA POWER model, clearness index, Osmaniye

First Page

128

Last Page

147

Publisher

The Scientific and Technological Research Council of Türkiye (TÜBİTAK)

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

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