Yazar "Midilli, Adnan" seçeneğine göre listele

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    Benchmarking environmental impacts of power groups used in a designed UAV: Hybrid hydrogen fuel cell system versus lithium-polymer battery drive system
    (Elsevier Ltd, 2023) Çalışır, Duran; Ekici, Selçuk; Midilli, Adnan; Karakoç, T. Hikmet
    This study investigates the environmental impacts of using two different power groups in a fixed-wing Unmanned Aerial Vehicle (UAV). The first power group consists of a conventional electric motor, a lithium polymer battery and a propeller. The second power group is the hybrid power group formed by adding the Proton Exchange Membrane (PEM) fuel cell. The life cycle assessment (LCA) method is applied to the configurations to reveal environmental impact values (global warming, terrestrial ecotoxicity, photochemical oxidation, acidification, eutrophication and so on). Inventory and impact analysis calculations are performed using SimaPro 9.1 software. Ecoinvent 3.6 database is employed in this software. The environmental impact assessment is made according to CML-IA Baseline and ReCiPe method. In addition, the research involves hotspot analyses for both power group configurations. Consequently, the following is noticed as a result of a transition from lithium-polymer power group to hybrid hydrogen fuel cell system; (i) the global warming reduces by 6.95%, (ii) the terrestrial ecotoxicity reduces by 6.35%, (iii) the photochemical oxidation decreases by 1.23%, and (iv) the ozone layer depletion increases by 12.44%. These days when environmental problems stand out, the effects of UAVs hybridized with fuel cells, known as a clean energy source, related with environmental problems reflect the principal of this research.
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    Past and current components-based detailing of particle image velocimetry: A comprehensive review
    (Elsevier Ltd, 2023) Rohacs, Daniel; Yaşar, Onur; Kale, Utku; Ekici, Selçuk; Yalçın, Enver; Midilli, Adnan; Karakoç, T. Hikmet
    Particle image velocimetry has been widely used in various sectors from the automotive to aviation, research, and development, energy, medical, turbines, reactors, electronics, education, refrigeration for flow characterization and investigation. In this study, articles examined in open literature containing the particle image velocimetry techniques are reviewed in terms of components, lasers, cameras, lenses, tracers, computers, synchronizers, and seeders. The results of the evaluation are categorized and explained within the tables and figures. It is anticipated that this paper will be a starting point for researchers willing to study in this area and industrial companies willing to include PIV experimenting in their portfolios. In addition, the study shows in detail the advantages and disadvantages of past and current technologies, which technologies in existing PIV laboratories can be renewed, and which components are used in the PIV laboratories to be installed.
  • Küçük Resim Yok
    Öğe
    Past and current components-based detailing of particle image velocimetry: A comprehensive review (vol 9, e14404, 2023)
    (Cell Press, 2023) Rohacs, Daniel; Yaşar, Onur; Kale, Utku; Ekici, Selçuk; Yalçın, Enver; Midilli, Adnan; Karakoç, Tahir Hikmet
    [Abstract Not Available]