Akademik Çalışmalar

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http://hdl.handle.net/11527/13121
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Gözat

Sustainable Development Goal "Goal 7: Affordable and Clean Energy" ile Akademik Çalışmalar'a göz atma
  • Öge
    Assessment of geothermal power potential in the Gediz Basin, Turkey
    (Elsevier, 2022) Serpen, Umran ; Çobanoğlu, Melih ; Korkmaz, E. Didem ; Demirkıran, Zülfü ; Kılınç, Gizem ; https://orcid.org/0000-0001-7713-9551 ; Petroleum and Natural Gas Engineering Department
    By the end of 2020, the installed geothermal power capacity in Turkey reached 1643 MWe. Approximately one-fifth of the capacity of the installed power plants is located at the Gediz graben, which is geologically the second largest structure of the Menderes Massif. The Gediz graben has several geothermal surface manifestations and geothermal resources that have been discovered. When considering the structural/geological similarities between the Buyuk Menderes and the Gediz graben, both regions can be assessed as geothermal basins. The scope of this study is to estimate the geothermal power potential of the Gediz graben. To achieve this, a different stochastic approach is used rather than the conventional geothermal resource assessment. This approach involves using temperature depended volume distributions obtained from drilled wells, which lead to improved and solid results. Three hot anomalies that are identified from temperature dependent volumes are evaluated using the Monte Carlo Simulation technique. In these simulations, distribution data of other parameters are used along with data obtained from the drilled wells in the region. The power potential (MWe) values for three identified anomalies in terms of P10, P50 and P90 values are estimated to be 825, 1157 and 1524 MWe, respectively. Furthermore, additional geothermal potential discovery is predicted in the graben, provided that extensive efforts are exerted. Keywords: Menderes Massif; Gediz graben; Resource assessment; Geothermal basin assessment; Geothermal power potential estimation; Turkey
  • Öge
    Energy Production from Biomass Valorization
    ( 2023-05-24) Yangın Gömeç, Çiğdem ; Sárvári Horváth, Ilona ; Martin, Carlos ; 0000-0003-3519-4821 ; Environmental Engineering
  • Öge
    Enhanced energy recovery in municipal wastewater treatment plants through co-digestion by anaerobic membrane bioreactors : current status and future perspectives
    (Springer, 2024) Cengiz, Ali İzzet ; Güven, Hüseyin ; Özgün, Hale ; Erşahin, Mustafa Evren ; 0000-0002-4715-9567 ; 0000-0001-6754-0106 ; 0000-0001-8784-8351 ; 0000-0003-1607-0524 ; Çevre Mühendisliği
    Today, the transition to renewable energy from conventional energy practices is more important than ever to establish energy security and mitigate climate change. The wastewater treatment plants (WWTP) consume a remarkable amount of energy and cause significant greenhouse gas emissions. The energy balance of WWTP can be improved by implementing energy-efficient applications such as anaerobic digestion. However, most of the existing WWTPs utilize only sewage sludge in conventional anaerobic digesters (CAD) which results in low biogas generation. Generally, co-digestion is indicated as an effective solution for the low biogas generation faced in mono-digestion. Moreover, recently, anaerobic membrane bioreactors (AnMBR) have been promoted as a prominent alternative to CADs. This paper overviews the current situation of co-digestion applications by AnMBRs for municipal WWTPs. Furthermore, the environmental and economic aspects of these applications were reviewed. Lastly, challenges and future perspectives related to the co-digestion applications by AnMBR were thoroughly discussed.
  • Öge
    Tailoring a geomodel for analyzing an urban skyline
    (Science Direct, 2012-03-30) Güney, Caner ; Girginkaya Akdağ, Suzan ; Çağdaş, Gülen ; Yavuz, Sinem ; 0000-0002-1620-1347 ; Geomatic Engineering
    A skyline is a unique fingerprint of a city. The mentalities, diversity, and cultures in a city can often be perceived from its skyline. Istanbul's iconic skyline forms an essential part of the character and appearance of this mega city, so much so that Istanbul's historical silhouette is instantly recognizable; it is a unique asset that is important to protect. Impressive minarets and domes dominate the skyline of Istanbul. On the other hand, Istanbul's skyline has changed dramatically over the last decade since land has become increasingly an opportunity for investment and building of taller structures has become one way to multiply this profit. For those who focus on the esthetics of cities, the analysis of the skyline is not a recent phenomenon. However, skyline extraction and analysis has not usually been available in current GIS functionality. This article investigates the esthetics the urban skyline and its transformation due to high-rise buildings. It does this by tailoring a geomodel within a GIS environment. It is believed that the geomodel developed in this study will form a solid foundation which can be applied to many of the urban skylines and urban areas in Turkey and other cities of the world.
  • Öge
    The fan design optimization for totally enclosed type induction motor with experimentally verified CFD-based MOGA simulations
    (Springer, 2024) Özyıldız, Tufan ; Şentürk Lüle, Senem ; 0000-0003-4036-969X ; 0000-0002-6632-5831 ; Enerji Enstitüsü
    The energy efficient electric motors save energy thus reduce operating costs. Since there are several losses affecting the motor efficiency, fan design plays an important role to minimize these losses. This study examines the effects of the design parameters of a radial bladed fan on the motor efficiency in a 132 frame with a power of 7.5 kW. The parametric analysis was carried out with the computational fluid dynamics method, and the results were used for the multiobjective genetic algorithm (MOGA) optimization study with the highest efficiency and the lowest motor body temperature objectives. The hub height, hub radius, distance to body cover, blade rising angle, fan cover entrance distance, blade edge angle, blade center radius, blade edge radius, blade end radius, and center edge distance were selected as optimization parameters. 151 simulations were performed. The results showed that the most important parameter for fan efficiency is the hub height which is the parameter that determines the height of the fan impeller diameter. According to the results, the optimum fan design increased the efficiency by 8% compared to the original fan and reduced the winding temperature by 8 °C. The optimized fan design was manufactured and tested against imulation data. This study contributes to sustainable development goals by improving motor efficiency that reduces the cost, designing of new components, and cooling the fan effectively that reduces the amount of copper used.
  • Öge
    Utilizing the potential of waste hemp reinforcement: investigating mechanical and thermal properties of polypropylene and polylactic acid biocomposites
    (American Chemical Society, 2024) Yılmaz, Anıl ; Özkan, Hakan ; Genceli Güner, F. Elif ; 0000-0002-6291-7792 ; 0000-0001-6201-6719 ; Kimya Mühendisliği
    Hemp has gained significant popularity for its diverse applications; however, this study explores the untapped potential of waste hemp (wH) as a cost-effective and sustainable bioadditive for the development of high-performance biocomposites. wH offers advantages such as low cost, easy availability, and suitability for extrusion. Polypropylene (PP) and poly(lactic acid) (PLA) served as polymer matrices for this investigation. In order to enhance the interaction between the wH and polymer matrices, alkaline and silane pretreatments were applied to the wHs of both matrices. At the same time, the MA-g-PP additive was used exclusively for the PP matrix. The resulting PP biocomposite demonstrated Young’s modulus (2986 MPa) and flexural modulus (2490 MPa), surpassing those of neat PP by 109 and 77%, respectively. Similarly, wH40-PLA-A showed enhancements in the PLA biocomposite, with Young’s modulus (6214 MPa) and flexural modulus (5970 MPa) representing an increase of 81 and 56% over that of neat PLA, respectively. The thermal properties and behaviors of the resulting biocomposites were minimally affected by the inclusion of wH as a bioadditive. This study contributes to the advancement of sustainable materials and provides valuable insights into the utilization of wH as a valuable resource for the development of high-performance biocomposites.