Sürdürülebilir Kalkınma Amaçları

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• MakaleAçık Erişim2023Scopus SJRQ1/r/bayburt/12939
  The effect of various industrial dust particles on the performance of photovoltaic panels in Turkey

  Güngör, Okan; Kahveci, Hakan; Gökçe, H. Süleyman

  The accumulation of dust is one of the main causes of power loss in photovoltaic (PV) farms, and the effect of dust particles’ size and chemistry on system performance is often overlooked. This study has focused on a comprehensive analysis of the effect of different dust particles collected from common industrial production facilities in Turkey on the performance of PV panels in the indoor laboratory environment. The collected dust samples were analyzed to determine the dust sample particles’ chemical properties, size, character, and topography. The data for dust samples at different weights with changes in maximum power point (MPP) of PV panel has been collected using the artificial solar irradiation source system. Thus, the mathematical correlations (R2≥0.965) between the PV panel Thevenin resistance (RTH), fill factor (FF), MPP, and pollution rate were obtained using these collected data and particle swarm optimization (PSO). According to the results of the obtained mathematical correlations, marble dust is 2.3, 3.4, and 4.2 times less polluting than cement, fly ash, and silica fume, respectively. Additionally, it was observed that smaller dust particles block more light than larger ones of the same weight and reduce MPP, FF while increasing the RTH.

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  AtıfScopus19·WoS14·OpenAlex21

  İncele
• MakaleYalnız künye2023Scopus SJRQ1/r/bayburt/11749
  Novel PV Array Reconfiguration and Integration with a Maximum Power Point Tracking Algorithm: RMPPT

  Güngör, Okan; Kahveci, Hakan

  Partial shading significantly impacts the output power of photovoltaic (PV) arrays. This issue can be addressed by reconfiguring connections or positions of modules within the PV array. However, reconfiguration approaches present some drawbacks including the requirements of manual effort, complex algorithms, difficulty in implementation, and switching matrices that increase power losses. To overcome these issues, we present a low-cost and easily implemented reconfiguration method with integration into a maximum power point tracking (MPPT) algorithm for a PV array. We denote our MPPT approach as reconfigurable MPPT (RMPPT), and verify its applicability using a particle swarm optimization (PSO) algorithm, namely the reconfigurable PSO. Consequently, this approach has enhanced the output power of the PV array by at least 7.2% compared to PNO (perturb and observe) and PSO-based MPPT under realistic weather conditions.

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  AtıfScopus6·WoS5·OpenAlex5

  İncele
• MakaleAçık Erişim2022Scopus SJRQ2/r/bayburt/11977
  A novel internal curing method for 3D-printed geopolymer structures reinforced with a steel cable: Electro-heating

  Gökçe, H.S.; Güngör, O.; Öksüzer, N.

  Buildability and structural integrity are the inherent challenges of 3D printed geopolymer structures needed to be overcome. Reinforcing with steel cable ensuring a higher structural integrity of the printed structure can simultaneously improve the buildability due to the heating capability of this component. The controllable instant heating capability of steel cable was achieved by the use of a specific circuit system in the study. As a novel internal curing technique, electro-heating is recommended in the additive manufacturing of steel cable-reinforced geopolymer structures by the authors.

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  AtıfScopus4·WoS3·OpenAlex5

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• MakaleYalnız künye2021Scopus SJRQ2/r/bayburt/14257
  An online software to simulate the shielding properties of materials for neutrons and photons: NGCal

  Gökçe, H. S.; Güngör, O.; Yilmaz, H.

  NGCal, a free online computation software (http://ngcal.com), has been developed for narrow beam transmission properties of photons (for energies of X rays and gamma rays between 0.002 MeV and 20 MeV), thermal (25.4 meV) and fast neutrons (4 MeV), in this regard it theoretically calculates the mass and linear attenuation coefficient/factor, mean free path, half- and tenth-value layers of materials formed by elements, compounds and composites. Its calculation assumptions, user guide as well as a comparative example of its results to those of other online computation platforms (XCOM, NCNR, WinXCOM, MCNPX, and Phy-X/PSD) are presented in this study. The developed software allows for more data input consisting of elements/oxides/compound and their fractions, and presents a number of shielding results required by researchers and scientists working on radiation shielding properties of multi-component materials.

  AtıfWoS85·OpenAlex93

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• MakaleYalnız künye2020/r/bayburt/13318
  MODELING OF BOOST AND CUK CONVERTERS AND COMPARISON OF THEIR PERFORMANCE IN MPPT

  Güngör, Okan; Yüksek, Halil İbrahim

  The efficiency of photovoltaic (PV) panel systems depends on the structure of the photovoltaic cells and the transfer of energy from the PV panel to load. The focus of this study is energy transfer. The most important component in the energy transfer is maximum power point tracking (MPPT). The MPPT consists of two components: the algorithm for calculation the maximum power and the hardware for power generating. This study investigates how some the DC-DC converters (hardware) impact on the performance of the MPPT under six different environmental conditions by using two different duty cycle calculation methods. Contribution of this study to the literatüre is to analyze the performance of some the DC-DC converters in MPPT by completely eliminating the effect of MPPT algorithms. As a result of this study, while using the Boost converter in MPPT applications, the internal resistance of the PV panel must be equal or smaller than load resistance. However, the Cuk converter can reach to maximum power point in all conditions such as temperature, radiation and load.

  AtıfScopus2

  İncele
• MakaleAçık Erişim2019/r/bayburt/15158
  Güneş Panellerinde Cuk Dönüştürücü Tabanlı Değişken Şartlar Altında D&G, BM ve YSA Algoritmalarının Karşılaştırmalı Performans Analizi

  Güngör, Okan

  Güneş enerjisinden elektrik üretmekte kullanılan PV panellerin verim artırma çalışmaları devametmektedir. Verimi etkileyen unsurların başında MGNT algoritmaları gelmektedir. Bu çalışmada sezgisel(BM, YSA) ve D&G tabanlı MGNT algoritmaları incelenmiştir. Sezgisel algoritmaların uygulanabilmesi içinCuk dönüştürücüye ait denetleç tasarımı Matlab aracılığıyla yapılmıştır. Yapılan benzetim çalışmaları sonucunda, üçfarklı MGNT algoritmasının performans analizleri gösterilmişti

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  AtıfOpenAlex2·TR Dizin1

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