No abstract

Knowledge of the local solar radiation is important for many applications of solar energy systems. The global solar radiation on horizontal surface at the location of interest is the most critical input parameter employed in the design and prediction of the performance of solar energy systems. In this study, 3 empirical sunshine based models are compared correlating the monthly mean daily global solar radiation on a horizontal surface with monthly mean sunshine records for Nigde, Turkey. Models are compared using coefficient of determination (R2), the root mean square error (RMSE), the mean bias error (MBE) and the t-statistic. According to our results, all the models fitted the data adequately and can be used to estimate the specific monthly global solar radiation. The t-statistic was used as the best indicator; this indicator depends on both, and is more effective for determining the model performance. The agreement between the estimated and the measured data were remarkable and the method was recommended for use in Nigde, Turkey.

Progressive decline in world energy resources, rising costs, on behalf of the various studies has led businesses to use energy resources efficiently. This work is at the top of the exergy analysis. In this study, using data from Eregli Sugar Factory 2010–2011 campaign year for sugar production processes, the first law of thermodynamics (energy analysis) and analysis of these condlaw (exergy analysis) were conducted. Depending on there sults of this analysis of the sugar production process yields the first and these cond law is calculated. Obtained in the light of the secalculation stoin crease theen ergy efficiency of the plant, was tetoprovide energy to gainth embackand give direction to the development of new technologies Eregli Sugar Factory recommendations were made.

Hydrogen energy is considered as one of the cleanest sources of energy due to its high efficiency. The only combustion product of hydrogen is water. Gasification can be used for the conversion of wastes into other fuels, and it presents an engaging renewable replacement for fossil fuels. This study aims to produce hydrogen as a result of co-gasification of MSW with coal to generate energy during its disposal. The importance of the system has been emphasized by making energy and exergy analyses. Gasification performance and the importance of hydrogen production of municipal solid blended with coal at different ratios (10%, 30%, 50%, 70%, and 90%) were also determined. A numerical model was developed for the co-gasification system. This study implies that gasification can be used for the evaluation of coal with disposal of MSW and conversion of these wastes into energy, without harming the environment.