Yazar "Hepbaşlı, Arif" için Havacılık ve Uzay Bilimleri Fakültesi listeleme
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Advanced exergoenvironmental assessment of a building from the primary energy transformation to the environment
Açıkkalp, Emin; Hepbaşlı, Arif; Yucer, Cem Tahsin; Karakoç, Tahir Hikmet (Elsevier Science Sa, 2015)Buildings are of great importance in terms of consumption of energy all over the world. Building sector has a significant influence over the total natural resource consumption and is significant contributors of greenhouse ... -
Advanced exergy analysis of an aircraft gas turbine engine: Splitting exergy destructions into parts
Şöhret, Yasin; Acikkalp, Emin; Hepbaşlı, Arif; Karakoç, Tahir Hikmet (Pergamon-Elsevier Science LTD, 2015)Advanced exergy analysis of an aircraft gas turbine engine is presented in this paper. In this framework, the main exergy parameters of the engine components are introduced while the exergy destruction rates within the ... -
Advanced life cycle integrated exergoeconomic analysis of building heating systems: An application and proposing new indices
Açıkkalp, Emin; Hepbaşlı, Arif; Yucer, Cem Tahsin; Karakoç, Tahir Hikmet (Elsevier Sci LTD, 2018)Advanced exergy-based analysis and assessment tools have been considered very useful tools for detecting the interactions among components of energy-conversion systems and the real potential for improving each component ... -
Advanced low exergoeconomic (ALEXERGO) assessment of a building along with its heating system at various stages
Açıkkalp, Emin; Yucer, Cem Tahsin; Hepbaşlı, Arif; Karakoç, Tahir Hikmet (Elsevier Science Sa, 2015)The present study deals with evaluating the performance of a building heating system along with its main components using advanced low exergoeconomic analysis method. This method combines advanced exergoeconomic with low ... -
Advanced low exergy (ADLOWEX) modeling and analysis of a building from the primary energy transformation to the environment
Açıkkalp, Emin; Yucer, Cem Tahsin; Hepbaşlı, Arif; Karakoç, Tahir Hikmet (Elsevier Science Sa, 2014)The main objective of the present study is to model, analyze and assess a building heating system along with its main components through advanced low exergy method. This method is shortly called ADLOWEX and combines advanced ... -
Application of Artificial Neural Network (ANN) method to exergy analysis of thermodynamic systems
Yoru, Yılmaz; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (IEEE Computer Soc, 2009)Exergy is a way to sustainable development and may be defined as the maximum theoretical useful work, while exergy analysis identifies the sources, the magnitude and the causes of thermodynamic inefficiencies within each ... -
Dynamic energy and exergy analyses of an industrial cogeneration system
Yoru, Yılmaz; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Wiley, 2010)The study deals with the energetic and exergetic analyses of a cogeneration (combined heat and power, CHP) system installed in a ceramic factory, located in Izmir, Turkey. This system has three gas turbines with a total ... -
Exergetic analysis of an aircraft turbofan engine
Turgut, Enis Turhan; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (John Wiley & Sons LTD, 2007)The main objective of the present study is to perform an exergy analysis of a turbofan kerosene-fired engine with afterburner (AB) at sea level and an altitude of 11000 m. The main components of this engine include a fan, ... -
Exergetic, Exergoeconomic and Sustainability Assessments of Piston-Prop Aircraft Engines
Altuntaş, Önder; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Turkish Soc Thermal Sciences Technology, 2012)In this study, the exergetic, exergoeconomic, and sustainability aspects of piston-prop aircraft engines are comprehensively reviewed. These analysis and assessment tools are applied to a four-cylinder, spark ignition, ... -
Exergoeconomic analysis of an aircraft turbofan engine
Turgut, Enis Turhan; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Inderscience Enterprises LTD, 2009)This study deals with an exergoeconomic analysis of an aircraft turbofan engine utilising the kerosene as fuel. A new parameter is developed to define the trust cost rate. The cost of exergy destruction, the relative cost ... -
Exergoeconomic Environmental Optimization of Piston-Prop Aircraft Engines
Altuntaş, Önder; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Taylor & Francis Inc, 2015)In this study, exergy, exergoeconomic, exergoenvironmental analyses, and exergoeconomic environmental optimization are applied to a four-cylinder, spark ignition, naturally aspirated and air-cooled piston-prop aircraft ... -
Exergoenvironmental analysis of piston-prop aircrafts
Altuntaş, Önder; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Inderscience Enterprises LTD, 2012)This study deals with exergoenvironmental analysis of a four-cylinder, spark ignition, naturally aspirated and air-cooled piston-prop aircraft engine for landing takeoff (LTO) and cruise phases. This analysis includes the ... -
Exergy analysis of a cogeneration system through Artificial Neural Network (ANN) method
Yoru, Yimaz; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Inderscience Enterprises LTD, 2010)The main objective of this study is to apply the Artificial Neural Network (ANN) method to a cogeneration system, located in Izmir, Turkey, for exergetic evaluation purposes. The data used are based on the actual operational ... -
Exergy analysis of a turbofan aircraft engine
Turgut, Enis Turhan; Karakoç, Tahir Hikmet; Hepbaşlı, Arif; Rosen, Marc A. (Inderscience Enterprises LTD, 2009)An exergy analysis is reported for a General Electric turbofan engine (the CF6-80) using sea-level data. The effects on exergy efficiencies and exergy destructions are investigated of modifying the isentropic efficiencies ... -
Exergy as a useful tool for the performance assessment of aircraft gas turbine engines: A key review
Şöhret, Yasin; Ekici, Selçuk; Altuntaş, Önder; Hepbaşlı, Arif; Karakoç, Tahir Hikmet (Pergamon-Elsevier Science LTD, 2016)It is known that aircraft gas turbine engines operate according to thermodynamic principles. Exergy is considered a very useful tool for assessing machines working on the basis of thermodynamics. In the current study, ... -
Investigating the Effect of Turbine Inlet Temperature on the Exergetic Improvement Potential of a Small Turbojet Engine
Turan, Önder; Hepbaşlı, Arif; Karakoç, Tahir Hikmet (IEEE, 2017)This paper analyzes and evaluates exergetic improvement rate (IPex) of the components of a small turbojet engine with various turbine inlet temperatures. The engine consists of an inlet, starter generator, a centrifugal ... -
Investigating the effect of turbine inlet temperature on the exergetic improvement potential of a small turbojet engine
Turan, Önder; Hepbaşlı, Arif; Karakoç, Tahir Hikmet (Institute of Electrical and Electronics Engineers Inc., 2017)This paper analyzes and evaluates exergetic improvement rate (IPex) of the components of a small turbojet engine with various turbine inlet temperatures. The engine consists of an inlet, starter generator, a centrifugal ... -
Investigating the exergetic and environmental effects of subcooling and superheating processes on the performance of direct expansion systems
Sögüt, M. Ziya; Karakoç, Tahir Hikmet; Oktay, Z.; Hepbaşlı, Arif (Springer International Publishing, 2014)Recently, subcooling and superheating applications, which are proposed as an approach for the efficient use of energy, have positive effect on the emission next to increasing the energy efficiency. This study examines ... -
Investigation of environmental and exergetic performance for coal-preparation units in cement production processes
Sögüt, M. Ziya; Oktay, Zuhal; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Pergamon-Elsevier Science LTD, 2012)The main objectives of the present study are to perform energy and exergy analyses of a coal-preparation unit in a cement plant and investigate the effect of varying dead state (ambient) temperatures on exergy efficiency. ... -
Investigation of environmental impact caused by aircraft engines
Altuntaş, Önder; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Inderscience Enterprises LTD, 2013)The environmental effects of exhaust gas emissions from different types of spark ignitions (SIs) - naturally aspirated and air-cooled from piston-prop aircraft engines - at the landing and take-off (LTO) phase of flight-based ...