Recep Tayyip Erdoğan Üniversitesi Kurumsal Akademik Arşivi
DSpace@RTEÜ, Recep Tayyip Erdoğan Üniversitesi tarafından doğrudan ve dolaylı olarak yayınlanan; kitap, makale, tez, bildiri, rapor, araştırma verisi gibi tüm akademik kaynakları uluslararası standartlarda dijital ortamda depolar, Üniversitenin akademik performansını izlemeye aracılık eder, kaynakları uzun süreli saklar ve yayınların etkisini artırmak için telif haklarına uygun olarak Açık Erişime sunar.
Güncel Gönderiler
Bibliometric and systematic review of biostimulant research under drought stress
(Elsevier, 2026) Liaqat, Waqas; Altaf, Muhammad Tanveer; Jan, Muhammad Faheem; Maqbool, Asia; Ali, Awais; Barutçular, Celaleddin; Rahimi, Mehdi
Drought stress, a critical environmental factor impacting global crop productivity, is exacerbated by the challenges of climate change. Biostimulants (BS), substances that enhance plant resilience to abiotic stress without directly providing nutrients, have emerged as a promising solution for mitigating drought induced damage. However, the increasing volume and diversity of research in this area necessitate a systematic approach to evaluate its development. This advanced bibliometric and systematic review analyzes 499 publications from the Web of Science Core Collection published between 2015 and 2024. The review focuses on the role of BS in drought stress management and identifies key research trends, influential authors, major journals. Emerging topics include phytohormonal regulation, antioxidant defense, and microbial interactions. The results reveal a substantial increase in research output, reflecting a growing global interest in BS as an eco-friendly alternative to conventional fertilizers. The review highlights several primary mechanisms by which BS enhance drought tolerance., These mechanisms include the modulation of plant stress response pathways and antioxidant systems. Additionally, microbial-based BS play a role in improving soil health and nutrient uptake. Despite notable progress, several gaps remain. These include the need for standardized evaluation methods and deeper molecular insights into BS action. This review offers a comprehensive overview of the field and provides insights for future research directions. It emphasizes the potential of BS to contribute to a more holistic approach to sustainable agriculture under climate change.
Wireless power transfer in offshore renewable energy: A review of technologies, challenges, and future directions
(KeAi Communications Co., 2026) Kaur, Nisha; Sudhakar, K.; Mohamed, M.R.; Cüce, Erdem; Barbulescu, Dan
The growing demand for sustainable and reliable energy solutions in remote coastal regions has sparked significant interest in offshore renewable energy systems, including floating solar arrays, wind turbines, wave energy, and hybrid energy systems. Wireless Power Transfer (WPT) technologies have emerged as a promising approach that enhances safety and efficiency in power generation, transmission, and storage, particularly in challenging underwater and oceanic environments. The primary objective of this study is to evaluate the effectiveness of various WPT methods for offshore energy transmission, including near-field techniques (inductive and capacitive coupling) and far-field approaches (microwave and laser-based systems), while addressing the challenges presented by long-distance energy transportation and undersea infrastructure. Additionally, this study highlights innovations in energy storage technologies, such as underwater pumped storage hydropower (UPSH), underwater compressed air energy storage (UWCAES), and electrochemical storage systems, which help to mitigate the instability of renewable energy generation. Through a comprehensive analysis of existing literature and case studies, this study highlights the technical, economic, and environmental challenges associated with offshore wireless energy systems. Key findings suggest that while WPT offers significant advantages in safety and flexibility, further research is needed to optimise efficiency, reduce costs, and minimise ecological impacts.
Comparative performance and economic analysis for different clean energy and hydrogen production systems: A case study for Türkiye
(Elsevier, 2026) Karabuga, Arif; Cüce, Erdem; Cüce, Pınar Mert; Utlu, Zafer
This study introduces a novel, data-driven assessment of an integrated solar-wind hybrid system for green hydrogen and electricity generation in Türkiye. In contrast to most modelling-based research, the analysis employs high-resolution real field data comprising 6958 measurements to capture annual variability and system dynamics under three operational modes: Scenario S-1 (hydrogen-only production via electrolysis), Scenario S-2 (simultaneous hydrogen and electricity generation), and Scenario S-3 (electricity-only production). The findings demonstrate that hydrogen production ranged between 125 kg (May) and 300 kg (July), whilst overall system efficiency varied from 24 % to 80 %, peaking in S-3 due to lower conversion losses. Hydrogen production costs were calculated between 2.40 and 2.95 $/kg, and electricity generation costs between 0.125 and 0.17 $/kWh. Among all configurations, the hybrid mode (S-2) achieved the most balanced performance, combining steady power output, high resource utilisation, and cost efficiency. Beyond its technical outcomes, this study provides the first multi-scenario, field-validated comparative analysis for Türkiye, incorporating thermodynamic and economic perspectives. By highlighting seasonal fluctuations, grid independence, and the benefits of energy security, the results provide an innovative framework for designing resilient hybrid renewable-hydrogen systems. Overall, the work establishes a scientific foundation to guide national energy strategies, investment decisions, and low-carbon policy development.
Synergistic effects of ionic liquid and redox species for improved aqueous-based Zn-ion capacitor
(Elsevier, 2026) Ülker, Emine Kapancık; Mohammadzadeh, Kazem; Lahiri, Abhishek
As the demand for high-performance energy storage devices grow, aqueous zinc-ion hybrid capacitors (ZICs) have gained significant attention for their ability to combine the high energy density of zinc-ion batteries (ZIBs) with the high-power density of supercapacitors (SCs). However, their application is limited by poor stability caused by zinc dendrite growth from uneven Zn deposition/stripping. Ionic liquids (ILs) and redox species in ZICs are an emerging area of research focused on improving the performance and efficiency of energy storage devices. The combination of IL and redox species can enhance the charge storage capacity, stability, and cycling performance of ZICs, potentially providing high energy and power densities with long-term durability. Herein, synergistic effects of 1-Ethyl-3-methylimidazoliumtriflate (EMImTfO) and 1-Ethyl-3-methylimidazolium iodide (EMImI) were investigated on aqueous electrolyte of Zn(TfO)2. The Zn/graphene ZIC delivers capacities of 82 and 96 mAh g−1 at 0.5 A g−1 in Zn(TfO)2 and Zn(TfO)2/ EMImTfO electrolytes, respectively, while the redox additive of EMImI boosts the capacity to 182 mAh g−1 under the same conditions. Moreover, even at a high current density of 5 A g−1, the capacity was found to be 100 mAh g−1, indicating improved rate capability. These findings offer a promising strategy for the development of redox-active electrolytes tailored for next-generation sustainable energy storage systems.
Exploring the effect of ultrasonic vibrations on the thermohydraulic performance in a minichannel heat sink: Numerical analysis of experimental results
(Elsevier, 2026) Alenezi, Abdulmajeed; Gürsoy, Emrehan; Ergün, Alper; Phelan, Patrick; Gedik, Engin
Ultrasonic ( US ) applications in thermal systems contribute to the disruption of the boundary layer and the increase of mixing in fluids, thus improving overall system performance. Utilizing this phenomenon, this study aimed to investigate the effect of US power and various heat inputs (Q̇) on the thermohydraulic performance and entropy generation in a rectangular minichannel heatsink. The effect of US on MCHSs has not been comprehensively investigated in the literature, both experimentally and numerically. This study aims to fill this gap and provide a scientific contribution to thermohydraulic performance and entropy generation. For this purpose, a test rig was designed and built. The heatsink was made of copper, and a 27.8 kHz US transducer with P us = 9.9 W input power was applied to the top wall of the heatsink. ANSYS Fluent 2024 R1 was used to solve the governing equations in numerical analysis. The analyses were performed under laminar flow conditions with a range of Reynolds numbers ( Re ). The results obtained from the experiments and numerical simulations demonstrated reasonable agreement, both with each other and with literature correlations. The results showed that the average Nusselt number ( Nu ) increased by 14% when Q̇ was increased from 50 W to 60 W, and by 13% when US was applied. The US application provides a more homogeneous temperature distribution in the channel and header, especially at low Re . It was determined that Q̇ did not affect the friction occurring in the system, but the friction effect of US was more dominant, especially at low Re . Increasing the Q̇ to the system worsened the performance by increasing thermal entropy generation (Ṡgen, thermal) up to 30%. In contrast, the use of US improved the performance by reducing Ṡgen, thermal by up to 4.5%. The situation was reversed for frictional entropy generation (Ṡgen, frictional), where increasing Q̇ yielded a decrease of up to 5%. However, when the US was applied, there was a 38% increase in Ṡgen, frictional at Re = 84 for each Q̇ and Ṡgen, thermal is more dominant than Ṡgen, frictional. In other words, compared with conventional MCHSs without US , the proposed US -assisted system increased the average Nu by 13% and reduced the Ṡgen, thermal by up to 4.5%, resulting in a significant improvement in performance.
