jotaf Tekirdağ Ziraat Fakültesi Dergisi 1302-7050 2146-5894 Tekirdağ Namık Kemal Üniversitesi 10.33462/jotaf.1512442 Agricultural Energy Systems Tarımsal Enerji Sistemleri Global Güneş Radyasyonun Ampirik Modellenmesi için Yeni Modellerin Geliştirilmesi ve Uşak İlinde Uygulanması Development of New Models Using Empirical Modeling of Global Solar Radiation and Its Application in Usak City, Turkey https://orcid.org/0000-0003-1119-4894 Ersan Rabia AFYON KOCATEPE ÜNİVERSİTESİ https://orcid.org/0000-0002-7185-6514 Külcü Recep ISPARTA UYGULAMALI BİLİMLER ÜNİVERSİTESİ 12 23 2024 21 5 1235 1251 07 08 2024 11 09 2024 Copyright © 2005, Tekirdağ Ziraat Fakültesi Dergisi 2005 Tekirdağ Ziraat Fakültesi Dergisi

Bu çalışma ile Uşak iline yatay düzleme gelen aylık ortalama global güneş radyasyonunun tespit edilebilmesi için literatürde yer alan 12 amprik model, bu çalışma kapsamında geliştirilen 2 yeni model ve PVGIS veri tabanında yer alan SARAH ve CMSAF uydu tabanlı ile COSMO ve ERA5 yeniden analiz veri setleri karşılaştırılmıştır. Çalışma kapsamında geliştirilen yeni modeller; bölgenin sıcaklık, bulutluluk oranı ve saat açısını kullanmaktadır. Çalışma kapsamındaki verilerin karşılaştırılmasında; determinasyon katsayısı (R²), ortalama yüzde hata (MPE), sapma hatası (MBE), ortalama karekök hatası (RMSE) ve yüzde hata (IeI) parametreleri kullanılmıştır. Değerlendirmeler sonucunda Uşak ilinin global güneş radyasyonu değerlerini en başarılı tahmin eden yöntem belirlenmeye çalışılmıştır. Modellerin aylık değerlendirmesine göre; Mart-Nisan-Mayıs-Haziran, Eylül-Ekim ve Aralık aylarında 14 modelin ve uydu tabanlı sistemlerin mutlak bağıl hata değerlerinin %5'in altında olduğu belirlenmiştir. Mayıs ayı için çalışmada kullanılan 18 farklı tahmin yönteminden 16'sında en doğru tahminler gerçekleşmiştir. Ampirik modellerin ve PVGIS veri setlerinin belirleme katsayısı 0,97'nin üzerindedir. Modellerin başarısı RMSE değerlerine göre değerlendirildiğinde bu çalışma kapsamında geliştirilen; saat açısı ve maks- min sıcaklık farkını kullanan logaritmik tabanlı Model 14’ün (0.90058 RMSE, 0.98327 R2, -1.079894 MPE, -0.05033 MBE ve 0.185628 t) en doğru tahminleri yaptığı belirlenmiştir. Konumsal verilerden COSMO yeniden analiz verisi (1.053134 RMSE, 0.979036 R2, -1.196348 MPE, -0.25105 MBE ve 0.8141 t) başarılı tahminler gerçekleştirmiş fakat COSMO verilerinin doğruluk seviyesi Model 14 tarafından tahmin edilen verilerden daha düşük gerçekleşmiştir. Çalışma ile kullanılan modellerin ve uydu tabanlı sistemlerin genel olarak başarılı olduğu sonucuna varılmıştır. Sonuç olarak Uşak ilinin global güneş radyasyonu tahmini için gerçekleştirilecek hassas hesaplamalarda çalışma kapsamında geliştirilen Model 14’ün kullanılabileceği, daha yüzeysel ya da ön fizibilite çalışmalarında PVGIS içerisinde yer alan COSMO yeniden analiz verisinin kullanılabileceği sonucuna varılmıştır.

With this study, 12 empirical models in the literature, 2 new models developed within the scope of this study, SARAH and CMSAF satellite-based models, COSMO and ERA5 re-analysis solar radiation data sets in the PVGIS database were compared in order to detect the monthly average global solar radiation coming to the horizontal plane of Usak province. New models developed within the scope of the study; it uses the region's temperature, cloudiness coefficient and sunset hour angle. In comparison of the datas within the scope of the study; coefficient of determination (R²), mean percent error (MPE), deviation error (MBE), root mean square error (RMSE), absolute relative error (ARE) parameters were used. As a result of the evaluations, the method that most successfully predicts the global solar radiation values of Usak province was tried to be determined. According to the monthly evaluation of the models; It was determined that 14 models and satellite-based systems have absolute relative error values below 5% in March-April-May-June, September-October and December. The most accurate estimates were realized for May in 16 of 18 different estimation methods used in the study. The coefficient of determination of empirical models and PVGIS data sets was above 0.97. When the success of the models was evaluated according to the RMSE values, It was determined that the logarithmic based Model 14 (0.90058 RMSE, 0.98327 R2, -1.079894 MPE, -0.05033 MBE, 0.185628 t) which was obtained by using the sunset hour angle and the max-min temperature difference developed within the scope of this study, made the most accurate estimations. COSMO data from spatial data (1.053134 RMSE, 0.979036 R2, -1.196348 MPE, -0.25105 MBE, 0.8141 t) made successful estimations, but the accuracy of the COSMO data was lower than the data estimated by Model 14. It was concluded that used the models and satellite-based systems were generally successful. As a result, In the studies to be carried out for the global solar radiation forecast of Usak province. It has been concluded that Model 14 developed within the scope of the study can be used in precise calculations and COSMO data from PVGIS datas can be used in more superficial or pre-feasibility studies.

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