Empirical modeling of solar radiation exergy for Turkey

Date

2016-08-01

Authors

Journal Title

Journal ISSN

Volume Title

Publisher

Elsevier

Abstract

In this study, three different empirical models are developed to predict the monthly average daily global solar radiation exergy on a horizontal surface for some provinces in different regions of Turkey by using meteorological data from Turkish State Meteorological Services. To indicate the performance of the models, the following statistical test methods are used: the coefficient of determination (R-2), mean bias error (MBE), mean absolute bias error (MABE), mean percent error (MPE), mean absolute percent error (MAPE), root mean square error (RMSE) and the t-statistic method (t(sta)). By the improved empirical models in this paper do not need exergy-to-energy ratio (psi) and monthly average daily global solar radiation to calculate solar radiation exergy. Consequently, the average exergy-to-energy ratio (psi) for all provinces are found to be 0.93 for Turkey. The highest and lowest monthly average daily values of solar radiation exergy are obtained at 23.4 MJ/m(2) day in June and 4 MJ/m(2) day in December, respectively. The empirical models providing the best results here can be reliably used to predict solar radiation exergy in Turkey and in other locations with similar climatic conditions in the world. The predictions of solar radiation exergy from regression models could enable the scientists to design the solar-energy systems precisely.

Description

Keywords

Thermodynamics, Energy & fuels, Engineering, Mechanics, Solar radiation exergy, Empirical models, Statistical methods, Reference crop evapotranspiration, Monthly average, Horizontal surfaces, Bright sunshine, Diffuse, Temperature, Regions, Errors, Mean square error, Meteorology, Radiation, Regression analysis, Solar energy, Solar radiation, Statistical methods, Statistical tests, Testing, Climatic conditions, Coefficient of determination, Daily global solar radiation, Empirical model, Horizontal surfaces, Meteorological data, Root mean square errors, Solar energy systems, Exergy

Citation

Arslanoğlu, N. (2016). "Empirical modeling of solar radiation exergy for Turkey". Applied Thermal Engineering, 108, 1033-1040.