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Daily UV radiation modeling with the usage of statistical correlations and artificial neural networks

Author

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  • Leal, S.S.
  • Tíba, C.
  • Piacentini, R.

Abstract

The information regarding solar UV radiation (UVA + UVB) in Brazil and around the world is scarce with low spatial and temporal coverage. This information scarcity, due to the small number of measuring stations, has directed some researchers towards the creation of computational parametric models or the generation of statistical models for the estimation of the UV radiation from the measurement of the global radiation. Information about UV irradiation is expanded for other places where there is only global radiation data. Thus, two stations were set up, in 2008, one in the city of Pesqueira and the other in Araripina, both in the state of Pernambuco, for simultaneous measurements of daily global solar and UV radiation. Another station is being set up in Recife-PE, completing a group of stations that are located between latitudes 8 and 10° and longitudes 34–38° W, representing the typical climate of the region. The daily values of G global and UV ultraviolet radiation (A + B) striking the horizontal plane in Pesqueira and Araripina during the time period (2008–2010) were measured, analyzed and compared. The collected data enabled the generation of three different statistical models for estimating the daily UV solar radiation from the daily global radiation: a) linear correlation between global and UV radiation (model 1), b) polynomial correction of the average fraction of UV irradiation, 〈FUV〉 as a function of the transmittance index of global solar irradiation 〈KT〉 (model 2) and c) the UV atmospheric transmittance index 〈KTUV〉 is obtained by multiple regression of the air mass 〈mr〉and 〈KT〉 (model 3). Besides, they were modeled by two artificial neural networks: a) estimative of the (FUV), considering the same physical variables of model 2 (model ANN1) and b) estimative of (KTUV) from the same physical variables of model 3 (model ANN2). The statistical models and the artificial neural networks displayed a good statistical performance with RMSE% inferior to 5% and MBE between −0.4%–2%. All the models can be used for estimating the UV radiation in places where there is only global irradiation data.

Suggested Citation

  • Leal, S.S. & Tíba, C. & Piacentini, R., 2011. "Daily UV radiation modeling with the usage of statistical correlations and artificial neural networks," Renewable Energy, Elsevier, vol. 36(12), pages 3337-3344.
    • Handle: RePEc:eee:renene:v:36:y:2011:i:12:p:3337-3344
    DOI: 10.1016/j.renene.2011.05.007
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    References listed on IDEAS

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    1. Cañada, J & Pedros, G & Bosca, J.V, 2003. "Relationships between UV (0.290–0.385 μm) and broad band solar radiation hourly values in Valencia and Córdoba, Spain," Energy, Elsevier, vol. 28(3), pages 199-217.
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    1. Wang, Lunche & Gong, Wei & Hu, Bo & Feng, Lan & Lin, Aiwen & Zhang, Ming, 2014. "Long-term variations of ultraviolet radiation in China from measurements and model reconstructions," Energy, Elsevier, vol. 78(C), pages 928-938.
    2. Porfirio, Anthony Carlos Silva & De Souza, José Leonaldo & Lyra, Gustavo Bastos & Maringolo Lemes, Marco Antonio, 2012. "An assessment of the global UV solar radiation under various sky conditions in Maceió-Northeastern Brazil," Energy, Elsevier, vol. 44(1), pages 584-592.
    3. Ibrahim M. Kadad & Ashraf A. Ramadan & Kandil M. Kandil & Adel A. Ghoneim, 2022. "Relationship between Ultraviolet-B Radiation and Broadband Solar Radiation under All Sky Conditions in Kuwait Hot Climate," Energies, MDPI, vol. 15(9), pages 1-19, April.
    4. Purohit, Ishan & Purohit, Pallav, 2015. "Inter-comparability of solar radiation databases in Indian context," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 735-747.
    5. Wang, Lunche & Gong, Wei & Ma, Yingying & Hu, Bo & Wang, Wenling & Zhang, Miao, 2013. "Analysis of ultraviolet radiation in Central China from observation and estimation," Energy, Elsevier, vol. 59(C), pages 764-774.
    6. Bilbao, J. & Miguel, A., 2013. "Contribution to the study of UV-B solar radiation in Central Spain," Renewable Energy, Elsevier, vol. 53(C), pages 79-85.
    7. Ghoneim, Adel A. & Kadad, Ibrahim M. & Altouq, Majida S., 2013. "Statistical analysis of solar UVB and global radiation in Kuwait," Energy, Elsevier, vol. 60(C), pages 23-34.

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