Kurum Yazarı "Keçebaş, Ali" Araştırma Çıktıları | TR-Dizin | WoS | Scopus | PubMed İçin Listeleme
-
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 ... -
Exergoenvironmental analysis for a geothermal district heating system: An application
Keçebaş, Ali (Pergamon-Elsevier Science Ltd, 2016)Energy sources are of great importance in relation to pollution of the world. The use of renewable energy resources and the creation of more efficient energy systems make great contributions to the prevention of greenhouse ... -
Exergy and thermoeconomic analyses of the diffusion absorption refrigeration system with various nanoparticles and their different ratios as work fluid
Yağız Gürbüz, Emine; Keçebaş, Ali; Sözen, Adnan (PERGAMON-ELSEVIER SCIENCE LTD, 2022)The fact that diffusion absorption refrigeration (DAR) systems can also work with low power plants has increased the interest in these cooling systems again. The DAR systems are mostly analyzed using energy analysis. ... -
Experimental and numerical investigation of diffusion absorption refrigeration system working with ZnOAl2O3 and TiO2 nanoparticles added ammonia/water nanofluid
Gürbüz, Emine Yağız; Sozen, Adnan; Keçebaş, Ali; Ozbas, Engin (Taylor & Francis Inc, 2020)In this paper, the effect of various zinc oxide aluminate spinel (ZnOAl2O3) and titanium oxide (TiO2) nanoparticle concentrations on the thermal performance of the Diffusion Absorption Refrigeration (DAR) system is ... -
Experimental Evaluation of a Photovoltaic/Thermal Air Heater with Metal Mesh-Integrated Thermal Energy Storage System
Tuncer, Azim Doğuş; Gürbüz, Emine Yağız; Keçebaş, Ali; Georgiev, Aleksandar G. (MDPI, 2023)he objective of this study is to improve the performance of a hybrid photovoltaic/thermal (PV/T) air heater incorporating a thermal energy storage system (TESS) that uses paraffin and has metallic mesh layers. In the ... -
Experimental Investigation of a Concentrating Bifacial Photovoltaic/Thermal Heat Pump System with a Triangular Trough
Karaca Dolgun, Gülşah; Güler, Onur Vahip; Georgiev, Aleksandar G.; Keçebaş, Ali (MDPI, 2023)The heat absorbed by the heat transfer fluid for cooling a concentrated photovoltaic thermal (CPVT) solar collector can be used for purposes such as residential heating and cooking. Because of the combined production of ... -
Experimental thermodynamic evaluation of a real cooling system with seawater-source and heat pump for a hotel in Turkey
Ural, Tolga; Keçebaş, Ali; Saçkan, Ömer (Wiley, 2020)It is noteworthy that energy consumption is very high in hotels in order to provide the comfort requirements of human beings. Especially in summer season, cooling is an important condition for comfort in a hotel. In hotel ... -
Hydrogen production
Kayfeci, Muhammet; Keçebaş, Ali; Bayat, Mutlucan (Academic Press Ltd-Elsevier Science Ltd, 2019)In today's society as global energy demands are addressed, it is expected that hydrogen will play a crucial role in future energy infrastructure. Hydrogen is being turned too as an energy carrier in hopes to wean our current ... -
Hydrogen properties
Keçebaş, Ali; Kayfeci, Muhammet (Academic Press Ltd-Elsevier Science Ltd, 2019)Most of the energy we use today is obtained from nonrenewable fossil fuels. This has not only depleted the reserves of fossil fuels, especially crude oil but has also caused severe environmental pollution. Intense effort ... -
Hydrogen storage
Kayfeci, Muhammet; Keçebaş, Ali (Academic Press Ltd-Elsevier Science Ltd, 2019)Hydrogen is becoming increasingly acknowledged as the energy carrier of choice for the 21st century. Hydrogen gas is a clean, highly abundant, and nontoxic renewable energy, and when it is used in different systems as fuel ... -
Improvement of thermo-hydraulic performance with plate surface geometry for a compact plate heat exchanger manufactured by additive manufacturing
Göltaş, Merve; Gürel, Barış; Keçebaş, Ali; Akkaya, Volkan Ramazan; Güler, Onur Vahip (PERGAMON-ELSEVIER SCIENCE LTD, 2022)Today, compact PHEs produced by additive manufacturing method have emerged when high heat transfer and low-pressure drop are required from PHEs under high temperature and pressure operating conditions. This has resulted ... -
Improvement potential of a real geothermal power plant using advanced exergy analysis
Gökgedik, Harun; Yürüsoy, Muhammet; Keçebaş, Ali (Pergamon-Elsevier Science Ltd, 2016)The main purpose of this paper is to quantitatively evaluate thermodynamic performance of a geothermal power plant (GPP) from potential for improvement point of view. Thus, sources of inefficiency and irreversibilities can ... -
Investigation of power generation from river surface runoff with a novel tilted axis hydrokinetic turbine for off-grid sites
Gökgedik, Harun; Özgür, Arif Emre; Yağız Gürbüz, Emine; Keçebaş, Ali (SAGE Publications Ltd, 2022)In this study, a novel tilted axis hydrokinetic turbine system is presented and tested to generate electricity from surface water streams in off-grid locations. This system consists of a turbine, differential, reducer, and ... -
Investigation of using modified photovoltaic solar panels for battery charge of electric L1 category vehicles
Devlet, Bayram; Ertürk, Mustafa; Yağız Gürbüz, Emine; Keçebaş, Ali (Elsevier Ltd, 2022)In this study, comparative tests of 3 different PV panels were carried out under 3 different scenarios, in order to charge L1 class vehicles. The first regular PV panel (N-PV) was used as a reference for performance ... -
Investigation on flow and heat transfer of compact brazed plate heat exchanger with lung pattern
Gurel, Baris; Akkaya, Volkan Ramazan; Goltas, Merve; Şen, Çağla Nur; Güler, Onur Vahip; Koşar, Mehmet İlkay; Keçebaş, Ali (Pergamon-Elsevier Science Ltd, 2020)This study relates to an evaluation of the thermo-hydraulic performance for a state-of-the-art compact brazer plate heat exchanger (PHE) in 3 kW for 3-plates. To improve heat transfer and pressure drop of the PHE, a lung ... -
Isıtma Enerji Tüketiminin Erzurum İçin Tahmini
Daşdemir, Ali; Keçebaş, Ali; Türkel, Veysel; Ertürk, Mustafa (Makine Mühendisleri Odası, 2022)Bu çalışmada Devlet Meteoroloji Genel Müdürlüğü'nden Erzurum için temin edi len 1972-2018 yılları arasındaki meteorolojik veri seti kullanılmıştır. Visual Basic programında geliştirilen bir yazılımla dış hava sıcaklığı 18 ... -
Life Cycle Assessment and Cumulative Energy Demand Analyses of a Photovoltaic/Thermal System with MWCNT/Water and GNP/Water Nanofluids
Karaca Dolgun, Gülşah; Koşan, Meltem; Kayfeci, Muhammet; Georgiev, Aleksandar G.; Keçebaş, Ali (MDPI, 2023)The global climate crisis has led society toward cleaner energy sources. Another reason is the limited reserves of fossil energy resources. Efforts to increase the efficiency of photovoltaic modules (PVs) have gained ...