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Global solar radiation over Turkey: comparison of predicted and measured data

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  • Türk Toğrul, Inci
  • Toğrul, Hasan

Abstract

In this study, various regression analyses were applied to estimate monthly mean solar radiation in Turkey, by using n̄/N̄ and n̄/N̄nh parameters. Also, equations which represent two periods of the year, winter and summer, were developed by using these parameters. The equations developed by using n̄/N̄nh ratio showed good results for the whole country, but, those which included n̄/N̄ ratio at different cities showed better results. Even better results were obtained when the equations were applied to the summer and winter. In addition to RMSE and MBE statistics, the t-test method and the harmonic analysis were employed to prove that the results are reliable.

Suggested Citation

  • Türk Toğrul, Inci & Toğrul, Hasan, 2002. "Global solar radiation over Turkey: comparison of predicted and measured data," Renewable Energy, Elsevier, vol. 25(1), pages 55-67.
    • Handle: RePEc:eee:renene:v:25:y:2002:i:1:p:55-67
    DOI: 10.1016/S0960-1481(00)00197-X
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    Keywords

    Estimation of solar radiation; t-statistic;

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