Kurum Yazarı "Karakoç, Tahir Hikmet" Bildiri Koleksiyonu İçin Listeleme
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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 ... -
Assessment of degradation effects for an aircraft engine considering exergy analysis
Sögüt, M. Ziya; Yalçın, Enver; Karakoç, Tahir Hikmet (Pergamon-Elsevier Science LTD, 2017)Despite the improvements in engine technology, the combustion processes and wear occurred in engine components affect performance adversely. The turbine and compressor fouling, degradation mechanisms such as erosion, ... -
Assessment of thermodynamic and environmental performances in subcooling process for different refrigerants
Altuntaş, Önder; Sögüt, M. Ziya; Yalçın, Enver; Karakoç, Tahir Hikmet (Inderscience Enterprises LTD, 2017)Subcooling application in cooling processes leads to increasing of cooling performance and energy efficiency within defined limits. This study examines subcooling effects of refrigerants on the coefficient of performance ... -
Exergetic sustainability improvement potentials of a hydrogen fuelled turbofan engine UAV by heating its fuel with exhaust gasses
Kaya, Nevzet; Turan, Önder; Midilli, Adnan; Karakoç, Tahir Hikmet (Pergamon-Elsevier Science LTD, 2016)Exergetic sustainability parameters such as, exergy efficiency, waste exergy ratio, environmental effect factor and exergetic sustainability index were investigated for an UAV having a turbofan engine for the case its ... -
Exergetic Sustainability Indicators as a Tool in Commercial Aircraft: A Case Study for a Turbofan Engine
Aydın, Hakan; Turan, Önder; Karakoç, Tahir Hikmet; Midilli, Adnan (Taylor & Francis Inc, 2015)This paper focuses on the exergetic sustainability indicators of a medium-range commercial aircraft engine for constant reference environment and ground running conditions. First, a detailed exergy analysis of turbofan ... -
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 ... -
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 ... -
Investigation of effects of hydraulic balance in mechanical system based on energetic and exergetic efficiency in industrial buildings
Sögüt, M. Ziya; Mutlu, Hamit; Karakoç, Tahir Hikmet; Isler, Namik (Inderscience Enterprises LTD, 2016)In the total energy demand and management for heating and cooling systems in industrial processes and commercial buildings for different zones, provision of the appropriate balance flows with hydraulic and thermal balancing ... -
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. ... -
A Parametric Study of a Piston-Prop Aircraft Engine Using Exergy and Exergoeconomic Analysis Methods
Altuntaş, Önder; Karakoç, Tahir Hikmet; Hepbaşlı, Arif (Taylor & Francis Inc, 2015)In this study, exergetic and exergoeconomic analysis methods are applied to a four-cylinder, spark ignition (SI), naturally aspirated and air-cooled piston-prop aircraft engine in the cruise phase of flight operations. The ... -
Parametric study of exergetic sustainability performances of a high altitude long endurance unmanned air vehicle using hydrogen fuel
Kaya, Nevzet; Turan, Önder; Karakoç, Tahir Hikmet; Midilli, Adnan (Pergamon-Elsevier Science LTD, 2016)Exergetic sustainability performances such as, exergy efficiency, waste exergy ratio, environmental effect factor and exergetic sustainability index of a HALE UAV were investigated parametrically. The UAV and its high ... -
Refrigeration inventory based on CO2 emissions and exergetic performance for supermarket applications
Sögüt, M. Ziya; Yalçın, Enver; Karakoç, Tahir Hikmet (Elsevier Science Sa, 2012)In this study, first energy and exergy analysis for supermarket cooling applications having high refrigerant capacity are examined and next, based on these analyses and different gases used. CO2 emission effect caused by ... -
Sustainable carbon management in corporate governance: A case study
Sögüt, M. Ziya; Yalçın, Enver; Karakoç, Tahir Hikmet (Elsevier Science BV, 2019)Institutional structures having leader roles in sustainable development must make regular and sustainable situation analyses to improve management strategies and particularly energy resources when environmental strategies ...