Yazar "Derse, Mehmet Sait" seçeneğine göre listele

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    Performance analysis of different PV modules technologies for Batman (Turkey)
    (İstanbul University, 2015) Pakma, Osman; Öztürker, Hakkı; Derse, Mehmet Sait; Pakma, Nilay; Güllü, Ömer
    The performance of a photovoltaic (PV) system depends on both the module technology and also on the outdoor conditions. The impact of solar radiation, ambient and module temperature, humidity, dust and ventilation can strongly affect energy production of the PV system. In this study, three 2.2 kW grid-connected PV generation systems under the outdoor conditions are analyzed in Batman (Turkey). The types of modules examined in this study are: monocrystalline silicon, polycrystalline silicon and amorphous silicon. The monthly and annual performance ratios have been calculated for the three modules and a comparison is presented here. Optimization potentials of Batman are also discussed.
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    Statistical analysis of solar radiation models onto inclined planes for climatic conditions of Batman (Turkey)
    (İstanbul University, 2015) Derse, Mehmet Sait; Öztürker, Hakkı; Pakma, Nilay; Pakma, Osman; Güllü, Ömer; Arsel, İsmail
    Solar energy is one of the most widely used renewable energy resources in the world. A drawback, common to the photovoltaic systems (PV) is their unpredictable nature and their output cannot be accurately predicted, because, these systems are dependent on climatic conditions. Solar radiation data are the best source of information for proper design of PV systems. In this study; hourly tilted surface solar radiation is measured at different slope angles in Batman (Turkey). Selected models were compared on the basis of the statistical error tests; mean square errors (MSE), mean absolute errors (MAE) and root mean square errors (RMSE) and mean absolute percentage error (MAPE). Besides, a new equation was developed to calculate monthly average daily global solar radiation in Batman.