https://hdl.handle.net/20.500.12809/8901 2026-04-20T05:15:42Z 2026-04-20T05:15:42Z Metin, Bengül Kavasoğlu, Neşe Kavasoğlu, Sertap https://hdl.handle.net/20.500.12809/10463 2022-12-28T06:25:52Z 2023-01-01T00:00:00Z

AFORS-HET simulation for investigating the performance of ZnO/n-CdS/p-CdTe /Ag solar cell depending on CdTe acceptor concentration and temperature Metin, Bengül; Kavasoğlu, Neşe; Kavasoğlu, Sertap In this study, a single junction dc photovoltaic solar cell simulation was carried out. ZnO/n-CdS/p-CdTe/Ag cell properties were investigated through the recognized 'Automatic Heterostructure Simulation (AFORS-HET)'. In the theoretical simulation process, the temperature was between 200 K and 400 K and the acceptor concentration of the CdTe layer was in the range of 1014 cm-3-1019 cm-3. The variation of Voc (open circuit voltage), Jsc (short circuit current density), FF (filling factor) and ii (efficiency) values with T (temperature) and Na (acceptor concentration) were investigated. It was observed that as Na increased, Voc values increased and Jsc values decreased. Voc, FF and ii decreased as the temperature was increased. Also, the sensitivity of FF to Na increased for acceptor concentration values greater than 1018 cm-3. It has been also shown that the filling factor decreased with photovoltaic current. ZnO/n-CdS/p-CdTe/Ag cells with an acceptor concentration greater than 1018 cm-3 exhibited high efficiency for all studied temperatures.

2023-01-01T00:00:00Z Aktar, Abdullah Kürşat Taşçıkaraoğlu, Akın Catalao, Joao P.S. https://hdl.handle.net/20.500.12809/10375 2022-11-08T11:30:47Z 2022-01-01T00:00:00Z

Optimal Charging and Discharging Operation of Mobile Charging Stations Aktar, Abdullah Kürşat; Taşçıkaraoğlu, Akın; Catalao, Joao P.S. Today 's technologies continue to grow by merging many various fields. The collaboration between electrical, electronic, mechanical and information technology is a necessity to re-evaluate the electrical energy system for including electric vehicles (EVs). In this study, the use of mobile charging stations (MCSs), which is expected to be one of the important components of the future energy systems, is considered to improve the satisfaction of EV users and an optimization algorithm is proposed to use MCS to minimize the quantity of the EVs that were not served. The results show that the use of MCS provides both operational and economic benefits compared to the expansion of permanent charging stations (PCSs) for increasing charging demands.

2022-01-01T00:00:00Z Gökgedik, Harun İncili, Veysel Arat, Halit Keçebaş, Ali https://hdl.handle.net/20.500.12809/3172 2021-04-12T21:00:42Z 2015-01-01T00:00:00Z

Assessment of Total Operating Costs for a Geothermal District Heating System Gökgedik, Harun; İncili, Veysel; Arat, Halit; Keçebaş, Ali District heating system (DHS), especially geothermal, is an important class of heating, ventilating, and air conditioning systems. This is due to the fact that in many countries and regions of the world, they have been successfully installed and operated, resulting in great economic savings. In recent years, such systems have received much attention with regard to improving their energy efficiency, equipment operation, and investment cost. Improvement in performance of a geothermal district heating system (GDHS) is a very effective mean to decrease energy consumption and to provide energy saving. To perform the potential energy savings in a GDHS, the advanced exergoeconomic analysis is applied to a real GDHS in the city of Afyon/ Turkey. Then, it is evaluated based on the concepts of exergy destruction cost and investment cost. The results show that the advanced exergoeconomic analysis makes the information more accurate and useful and supplies additional information that cannot be provided by the conversional analysis. Furthermore, the Afyon GDHS can be made more cost effectiveness, removing the system components' irreversibilities, technical-economic limitations, and poorly chosen manufacturing methods. International Conference on Energy and Management - JUN 05-07, 2014 - Istanbul Bilgi University, TURKEY; WOS: 000380565300028

2015-01-01T00:00:00Z