Long term outdoor performances of three different on-grid PV arrays in central Anatolia - An extended analysis

Long term outdoor testing of the PV systems at different climatic conditions or different systems under the same ambient conditions are extremely important in producing policies for the transition to renewables. The present research is the testing of three different PV systems under the same climatic conditions of central Anatolia, after four years of operation. The systems consist of a mono-Si, an a-Si thin film and a CdTe thin film arrays. Different calculation procedures of the input solar irradiation on tilted surface are used for comparison. Performances together with degradation rates are computed using different procedures and also using the measured solar data of 20 km away from the installed systems. The accuracy is verified using 4 months of simultaneous measurements. The results showed that the aforementioned different input calculation procedures of the performances are important and determinant. The 44-months-average efficiencies of these three systems are calculated to be 11.86%, 6.40% and 5.30%, respectively. The degradation rates of these systems are obtained as 0.40%, 1.88% and 10.60%, respectively. Although the degradation rates that are calculated for the first two systems are quite similar to those appeared in the literature, CdTe system is considerably higher than those given in the literature. (C) 2016 Published by Elsevier Ltd.


Cantürk, Zeynep; Akınoğlu, Bülent Gültekin; Özden, Talat; Department of Physics (2021-9-09)
Outdoor tests of photovoltaic modules are crucial for the market, and technological development. It is vital for manufacturers and researchers to conduct tests not only in the long term but also in different climatic conditions. In this thesis, 12 modules are tested in Middle Anatolia climate conditions for nine years in three different module groups, which are mono-crystalline (Mono-Si-1 & 2 & 3, Bifi-Mono-Si, HIT), polycrystalline (Poly-Si-1 & 2), and thin films (CIS-1 & 2, CIGS-1 & 2, µSi/a-Si). We analy...
Determining Photovoltaic Module Performance and Comparisons
Karaveli, Abdullah Buğrahan; ÖZDEN, TALAT; Akınoğlu, Bülent Gültekin (2018-11-14)
Knowing electricity production potential of a photovoltaic (PV) system prior to installation is very beneficial for the investor to see the feasibility of the investment. There are three procedures that can be followed to calculate the potential electricity production of any system under different conditions. These are installation of sample systems and gathering data over time, the use of some databases/software programs to reach the performances and developing new model/methodology to make these estimatio...
Long term outdoor testing of two different thin film pv modules in Ankara Turkey
Özden, Talat; Akınoğlu, Bülent Gültekin; Turan, Raşit (null; 2016-09-21)
Degradation of photovoltaic (PV) cells and modules in the long term is very important in transition to new energy policies by using renewables. Thin film solar cells are used commercially almost worldwide. In this context, we tested two different solar PV modules of copper indium gallium selenide and amorphous silicon thin film for four years. We used anisotropic sky model to calculate the solar irradiation input to the tilted modules and reached monthly performances, namely the efficiency and performance r...
Seasonal variation of the monthly efficiencies of thin film PV modules
Özden, Talat; Turan, Raşit; Akınoğlu, Bülent Gültekin (null; 2017-12-04)
Outdoor testing of solar photovoltaic (PV) modules must be carried out at different climates as PV power plants nowadays are installed and continues to be installed in many countries. Present study is outdoor testing results and analyses of 5 thin film modules in Ankara, Turkey. The analyses are carried out using monthly efficiencies of the modules that are derived using the energy yield and input. The average efficiencies of the CIS, CIGS and μc-Si/a-Si thin film modules are. We present the monthly and ave...
Optimal sizing of stand-alone photovoltaic systems in residential buildings
Okoye, Chiemeka Onyeka; Solyali, Oguz (2017-05-01)
Solar photovoltaic (PV) system is one of the matured solar-to-electricity conversion technologies with a great potential for residential applications. For wider adoption of PV systems, there is a need for an accurate sizing and economic assessment tool to inform decision makers. In this study, we propose a new optimization model based on integer programming for the adoption of stand-alone PV systems in the residential sector. The proposed model not only determines the optimal number of PV modules and batter...
Citation Formats
T. ÖZDEN, B. G. Akınoğlu, and R. Turan, “Long term outdoor performances of three different on-grid PV arrays in central Anatolia - An extended analysis,” RENEWABLE ENERGY, pp. 182–195, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/45053.