Kurum Yazarı "Keçebaş, Ali" Enerji Sistemleri Mühendisliği Bölümü Koleksiyonu İçin Listeleme
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Advanced exergoeconomic analysis with using modified productive structure analysis: An application for a real gas turbine cycle
Uysal, Cüneyt; Keçebaş, Ali (Elsevier, 2021)In this study, advanced exergoeconomic analysis is performed for a gas turbine cycle located in Inchon/ South Korea. In addition, an approach combining advanced exergy analysis with modified productive structure analysis ... -
Advanced Exergoeconomic Assessment of CO2 Emissions, Geo-Fluid and Electricity in Dual Loop Geothermal Power Plant
Güler, Onur Vahip; Gürbüz, Emine Yağız; Georgiev, Aleksandar G.; Keçebaş, Ali (MDPI, 2023)Binary geothermal power plants (GPPs) are mostly encountered in geothermal fields with medium and low temperatures. The design and operation of dual binary GPPs can be difficult due to the geothermal fluid properties. This ... -
Artificial Bee Colony-Based GMPPT for Non-homogeneous Operating Conditions in a Bifacial CPVT System
Demircan, Cihan; Keçebaş, Ali; Bayrakci, Hilmi Cenk (Springer International Publishing Ag, 2020)Photovoltaic (PV) modules directly convert the solar energy into electricity with electrical efficiency in 10-20%. The rest of the incident solar radiation reflects from front surface and converts into thermal energy which ... -
Artificial neural network-based optimization of geothermal power plants
Çetin, Gürcan; Özkaraca, Osman; Keçebaş, Ali (Elsevier, 2022)In the world, due to limited energy resources, low efficiency of renewable energies, complex and costly energy conversion technology, and environmental pollution, human beings are trying to develop and improve innovative ... -
Binary geothermal power plant
Başoğul, Yusuf; Güler, Onur Vahip; Keçebaş, Ali (Elsevier, 2022)In this chapter, information about the binary cycle in geothermal power plants (GPPs) is given. Binary GPPs are thermodynamically closest to a fossil-sourced thermal power plant or nuclear power plant. In the binary GPP, ... -
COMPARATIVE THERMAL AND FLOW ANALYSES OF TWO DIFFERENT PLATE PATTERNS FOR A COMPACT PLATE HEAT EXCHANGER
Gürel, Barış; Keçebaş, Ali; Akkaya, Volkan Ramazan; Göltaş, Merve; Kurtuluş, Karani; Güler, Onur Vahip (Knowledge Center on Organic Rankine Cycle Technology (KCORC), 2022)It is known that the most significant difference of plate heat exchangers (PHEs) from other heat exchangers (HEs) is their heat transfer efficiency. The thinness of the plates separating the two fluids compared to the other ... -
Comprehensive analysis of lightning strike activity on the power line for grid connected solar power plant
Demirel, Emre; Karaca Dolgun, Gülşah; Keçebaş, Ali (Elsevier Ltd, 2022)Transmission lines of the grid-connected solar power plants are affected by lightning strikes. According to the data taken from the malfunction report of the solar power plant located in the Aegean Region of Turkey, the ... -
Comprehensive transient analysis on control system in a photovoltaic power plant under lightning strike
Demirel, Emre; Karaca Dolgun, Gülşah; Keçebaş, Ali (Elsevier, 2022)Solar power plants are installed in high and open places to receive high solar radiation. However, this leaves them vulnerable to lightning strike. Lightning strike affects power plants in two ways, directly and indirectly. ... -
Conventional and advanced exergoeconomic analyses of geothermal district heating systems
Keçebaş, Ali; Hepbaşlı, Arif (Elsevier Science Sa, 2014)The present study deals with analyzing, assessing and comparing conventional and advanced exergoeconomic analyses to identify the direction and potential for energy savings of a geothermal district heating system in future ... -
Design and experimental analysis of a parallel-flow photovoltaic-thermal air collector with finned latent heat thermal energy storage unit
Yağız Gürbüz, Emine; Şahinkesen, İstemihan; Tuncer, Azim Doğuş; Keçebaş, Ali (Elsevier Ltd, 2023)In this work, it is aimed to improve the performance of a photovoltaic-thermal (PVT) air collector using finned latent heat thermal energy storage unit. In this regard, four different types of parallel-flow PVT (PPVT) ... -
Determination of optimum insulation thickness in pipe for exergetic life cycle assessment
Keçebaş, Ali (Pergamon-Elsevier Science Ltd, 2015)The energy saving and the environmental impacts' reduction in the world building sector have gained great importance. Therefore, great efforts have been invested to create energy-saving green buildings. To do so, one of ... -
An economic comparison and evaluation of two geothermal district heating systems for advanced exergoeconomic analysis
Keçebaş, Pınar; Gökgedik, Harun; Alkan, Mehmet Ali; Keçebaş, Ali (Pergamon-Elsevier Science Ltd, 2014)This paper refers to an economic comparison and evaluation of two geothermal district heating systems (GDHSs) under same reference state condition and mechanic/economic parameters by using an advanced exergoeconomic analysis. ... -
Educational and consciousness-raising movements for renewable energy in Turkey
Keçebaş, Ali; Alkan, Mehmet Ali (Sila Science, 2009)Turkey has some difficulties in meeting its energy need due to rapid industrialization and population growth. It is necessary to educate and raise the consciousness level of the future generations to use the renewable ... -
The effect of temperature distribution on parabolic triangular-based CPVT system performances: Electrical and thermal perspectives
Demircan, Cihan; Bayrakçı, Hilmi Cenk; Keçebaş, Ali; Calise, Francesco; Vicidomini, Maria (Elsevier Ltd, 2023)The performance of photovoltaic (PV) and photovoltaic-thermal (PVT) systems is affected by environmental parameters and working conditions such as, partial shading, refrigerant and operating temperature. This study focuses ... -
Effects of air gap on insulation thickness and life cycle costs for different pipe diameters in pipeline
Daşdemir, Ali; Ertürk, Mustafa; Keçebaş, Ali; Demircan, Cihan (Pergamon-Elsevier Science Ltd, 2017)This article reports the effects of air gap on insulation thickness and life cycle costs for different diameter steel pipes. The life cycle cost analysis based on heat degree days is used as a calculation method. Under ... -
Electrochemical hydrogen generation
Keçebaş, Ali; Kayfeci, Muhammet; Bayat, Mutlucan (Academic Press Ltd-Elsevier Science Ltd, 2019)Hydrogen is an important energy carrier resource that is discussed as an alternative to fossil-fuel sources in response to limiting greenhouse gas emissions, health problems, and increased energy demand. Hydrogen is obtained ... -
Energy and exergy analyses of a coal-fired micro-CHP system coupled engine as a domestic solution
Keçebaş, Ali; İncili, Veysel; Karaca Dolgun, Gülşah; Ural, Tolga (Elsevier Ltd, 2023)In this study, a coal-fired stoker boiler and a beta-type rhombic-drive Stirling engine were manufactured and tested. The performance of the coal boiler with a Stirling engine has been investigated experimentally for the ... -
Enhancing the performance of an unglazed solar air collector using mesh tubes and Fe3O4 nano-enhanced absorber coating
Gürbüz, Emine Yağız; Şahinkesen, İstemihan; Kusun, Barış; Tuncer, Azim Doğuş; Keçebaş, Ali; Gürbüz, Emine Yağız (Elsevier Ltd, 2023)In the current article, it is intended to improve the performance of an unglazed solar air collector using mesh tubes as extended heat transfer surfaces and nano-enhanced black paint as a thermal conductivity booster of ... -
Enhancing the thermal performance of diffusion absorption refrigeration system by using magnesium aluminate spinel oxide compound nanoparticles: an experimental investigation
Sözen, Adnan; Keçebaş, Ali; Yağız Gürbüz, Emine (Springer Science and Business Media Deutschland GmbH, 2021)This article aims to enhance the efficiency of Diffusion Absorption Refrigeration (DAR) systems which operate at low efficiency. This study experimentally investigates the effect of passive heat transfer enhancement by ... -
Environmental impact assessment of a real geothermal driven power plant with two-stage ORC using enhanced exergo-environmental analysis
Gürbüz Yağız, Emine; Güler, Onur Vahip; Keçebaş, Ali (PERGAMON-ELSEVIER SCIENCE LTD, 2022)Geothermal driven power plants (GPPs) with two-stage ORC are mostly used in low-temperature geothermal fields around the World. The environmental impacts of these GPPs create a gap in the literature. In this study, enhanced ...