研究目的
To develop a new formulation for the maximum efficiency of solar radiation conversion and a new methodology for estimating the exergy value of monthly average daily horizontal global radiation, incorporating various weather parameters.
研究成果
The new formulation for maximum efficiency and empirical models for solar radiation exergy are more reliable than existing models, with high accuracy in predictions. The findings support the use of these models for academic and industrial applications in solar energy analysis, with potential for future extensions to include additional parameters and global validation.
研究不足
The study is limited to specific locations in Iraq and Turkey; it does not account for grey and non-grey surfaces or other weather parameters like relative humidity. The models may need validation for different climatic conditions worldwide.
1：Experimental Design and Method Selection:
The study involves theoretical modeling of solar radiation exergy and maximum efficiency using thermodynamic principles, specifically for constant volume systems. It includes the development of empirical models based on climatic data.
2：Sample Selection and Data Sources:
Data from four locations (Karbala and Shatra in Iraq, Istanbul and Aydin in Turkey) collected between 2010 and 2016, sourced from national meteorological services.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned; primarily uses mathematical models and statistical analysis.
4：Experimental Procedures and Operational Workflow:
Calculation of solar radiation parameters (e.g., extraterrestrial radiation, sunny hours, day length, mean temperature, wind velocity) using established equations; application of new models to estimate exergy; validation using statistical parameters.
5：Data Analysis Methods:
Statistical analysis including coefficient of determination (R2), root mean square error (RMSE), mean bias error (MBE), mean absolute bias error (MABE), mean percentage error (MPE), mean absolute percentage error (MAPE), and t-statistic (tst).
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