Performance and Degradation Analyses of two Different PV Modules in Central Anatolia

Akınoğlu, Bülent Gültekin
Kurtz, Sarah
Ankara (latitude: around 40 degrees N) is in Central Anatolia and the climate is dry continental. Due to the rapid transition to renewable energy policies of Turkey it is now a must to complete truthful feasibility analyses for solar power systems countrywide. Long term performance and degradation analyses have been carried out by the authors for three different arrays and many research results appearing in the literature are summarized. Present research analyzes the outdoor testing results of two PV modules monthly data. One of the modules has multi crystalline silicon (Poly-Si) cells and the other is thin film silicon (amorphous Si / microcrystalline Si tandem structure - a-Si/mu c-Si) cells. The results showed that in five years the average yearly efficiency decreases from 14% to 11% for Poly-Si (14.72% is the nameplate Standard Test Condition (STC) efficiency) and from 8% to 6% for thin film modules (9.15% is STC efficiency). Our calculations are based on measured solar global-horizontal irradiance from which we calculated plane-of-array irradiation using an anisotropic sky model. We present the details of these analyses and degradation rates for the two types of modules to be used in long term feasibility analyses


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Ankara is in the Central Anatolia region of Turkey where the climate is dry-continental with an annual solar insolation of around 1750 kWh/m(2). In the transition to renewable energy, detailed analyses are required to ensure effective and economic utilization of the available solar resource. An essential part of these analyses is to calculate expected energy yield. For photovoltaic (PV) systems, this includes the effect of temperature on the PV efficiency, which determines the power yield of the PV modules....
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In Turkey, due to the fact that the Black Sea coast is vulnerable to storms and coastal hazards, further comprehensive studies for storm surge and consequent coastal inundation are necessary. The aim of this study is to investigate wave formation under storm conditions and analyze coastal flooding in Giresun during the storm event occurred between 23-26 September 2014. For this purpose numerical studies are carried out in two phases. In phase 1, coupled ADCIRC+SWAN model is used for examining wave generatio...
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Citation Formats
T. ÖZDEN, B. G. Akınoğlu, and S. Kurtz, “Performance and Degradation Analyses of two Different PV Modules in Central Anatolia,” 2018, Accessed: 00, 2020. [Online]. Available: