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Estimated monthly average global radiation for Turkey and its comparison with observations

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  • Aksoy, Bülent

Abstract

Global solar radiation data obtained from actinographs of the Turkish State Meterological Service were compared with data obtained from pyrheliometers that were established recently to determine if the actinograph data were usable in practice. It has been found that the observed actinograph data have a rather high error rate with 14.7% annual and 42.1% monthly averages. It has, however, not been possible to smooth these errors as they are absolutely random. Thus, a well known quadratic model was used to produce available radiation data. A quadratic relationship between solar insolation and duration of solar radiation data has been investigated in order to estimate monthly average global irradiance for Ankara, Antalya, Samsun, Konya, Urfa and İzmir. The data from August 1993 to July 1995 have been used in the quadratic model. But, observations of İzmir differ from other stations covered for about four years. Solar insolation data used in the quadratic model were obtained from the pyrheliometer with model CR10. Duration of bright sunshine data were obtained from a Siap, Frans or Müller sunshine recorder with 60° global lens. A general quadratic formula was found that represents the whole of Turkey. The estimated monthly average global solar radiation data, then, were produced from this quadratic formula. Comparison of the estimated and measured values showed that the quadratic model was able to estimate global radiation with about a 4% annual relative error and the estimated data seemed to be more reliable than the data measured by actinograph.

Suggested Citation

  • Aksoy, Bülent, 1997. "Estimated monthly average global radiation for Turkey and its comparison with observations," Renewable Energy, Elsevier, vol. 10(4), pages 625-633.
    • Handle: RePEc:eee:renene:v:10:y:1997:i:4:p:625-633
    DOI: 10.1016/S0960-1481(96)00035-3
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    Cited by:

    1. Besharat, Fariba & Dehghan, Ali A. & Faghih, Ahmad R., 2013. "Empirical models for estimating global solar radiation: A review and case study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 21(C), pages 798-821.
    2. Kaba, Kazım & Sarıgül, Mehmet & Avcı, Mutlu & Kandırmaz, H. Mustafa, 2018. "Estimation of daily global solar radiation using deep learning model," Energy, Elsevier, vol. 162(C), pages 126-135.
    3. Offiong, Aniekan & Ukpoho, A.U., 2004. "An analysis of solar gain through externally shaded window of buildings," Renewable Energy, Elsevier, vol. 29(1), pages 131-150.
    4. Celik, Ali N., 2011. "Review of Turkey's current energy status: A case study for wind energy potential of Çanakkale province," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(6), pages 2743-2749, August.
    5. Gul Kaplan, Ayse & Alper Kaplan, Yusuf, 2020. "Developing of the new models in solar radiation estimation with curve fitting based on moving least-squares approximation," Renewable Energy, Elsevier, vol. 146(C), pages 2462-2471.
    6. Offiong, Anickan & Ukpoho, A.U., 2004. "External window shading treatment effects on internal environmental temperature of buildings," Renewable Energy, Elsevier, vol. 29(14), pages 2153-2165.
    7. Robaa, S.M., 2008. "Evaluation of sunshine duration from cloud data in Egypt," Energy, Elsevier, vol. 33(5), pages 785-795.
    8. Bakirci, Kadir, 2009. "Correlations for estimation of daily global solar radiation with hours of bright sunshine in Turkey," Energy, Elsevier, vol. 34(4), pages 485-501.
    9. Bakirci, Kadir, 2009. "Models of solar radiation with hours of bright sunshine: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 13(9), pages 2580-2588, December.
    10. Despotovic, Milan & Nedic, Vladimir & Despotovic, Danijela & Cvetanovic, Slobodan, 2015. "Review and statistical analysis of different global solar radiation sunshine models," Renewable and Sustainable Energy Reviews, Elsevier, vol. 52(C), pages 1869-1880.
    11. Bayrakçı, Hilmi Cenk & Demircan, Cihan & Keçebaş, Ali, 2018. "The development of empirical models for estimating global solar radiation on horizontal surface: A case study," Renewable and Sustainable Energy Reviews, Elsevier, vol. 81(P2), pages 2771-2782.
    12. Muneer, T. & Asif, M. & Cizmecioglu, Z. & Ozturk, H.K., 2008. "Prospects for solar water heating within Turkish textile industry," Renewable and Sustainable Energy Reviews, Elsevier, vol. 12(3), pages 807-823, April.

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