Kurum Yazarı "Karakoç, Tahir Hikmet" Scopus İndeksli Yayınlar Koleksiyonu İçin Listeleme
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Indicators of Sustainability Energy Management Based on Energy Audit for Hotels
Öz, M. E. U.; Sögüt, M. Ziya; Karakoç, Tahir Hikmet (Springer International Publishing Ag, 2018)… -
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 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. ... -
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 ... -
Mathematical modeling of heat recovery from a rotary kiln
Sögüt, M. Ziya; Oktay, Zuhal; Karakoç, Tahir Hikmet (Pergamon-Elsevier Science LTD, 2010)In this study, heat recovery from rotary kiln was examined for a cement plant in Turkey. At first, an exergy analysis was carried out on the operational data of the plant. Results indicated the presence of 217.31 GJ of ... -
Mathematical modelling for carbon dioxide equivalent prediction of greenhouse gases emitted from a small scale turbojet engine
Şöhret, Yasin; Karakoç, Tahir Hikmet; Karakoç, N. (AIAA American Institute of Aeronautics and Astronautics, 2015)In this paper, carbon dioxide equivalent of greenhouse gases emitted from a small scale turbojet engine is investigated for various engine loads. Within this context, emitted greenhouse gases are measured in accordance of ... -
Numerical calculation of convective heat transfer coefficients in an enclosure heated from vertical walls
Extensive studies of natural convection problems in enclosures have been published in the literature. Convective heat transfer coefficients of vertical walls of real-size rooms significantly influence thermal comfort and ... -
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 ... -
Performance assessment of a vertical ground-source heat pump system with wall heating and cooling
Extensive studies on ground-source heat pump systems' performance have been published in the literature. Coefficient of performance (COP) on heating and cooling modes significantly influences thermal energy economics for ... -
Performance Evaluation of an Experimental Turbojet Engine
Ekici, Selçuk; Şöhret, Yasin; Çoban, Kahraman; Altuntaş, Önder; Karakoç, Tahir Hikmet (Walter De Gruyter GMBH, 2017)An exergy analysis is presented including design parameters and performance assessment, by identifying the losses and efficiency of a gas turbine engine. The aim of this paper is to determine the performance of a small ... -
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 ... -
Statistical model development for military aircraft engine exhaust emissions data
Nizamitdinov, A.; Şöhret, Y.; Shamılov, Aladdin; Karakoç, Tahir Hikmet (Springer International Publishing, 2017)[No abstract available] -
Sustainability Assessment of a Turboprop Engine: Exergy-Based Method
Şöhret, Yasin; Sögüt, M. Ziya; Turan, Önder; Karakoç, Tahir Hikmet (Springer International Publishing Ag, 2017)Sustainable energy utilization is a necessary to reduce environmental impact and combat global warming in twenty-first century. For this purpose, sustainability parameters of a turboprop engine are presented with exergetic ... -
Sustainability assessment of PW6000 turbofan engine: an exergetic approach
Aydın, Hakan; Turan, Önder; Karakoç, Tahir Hikmet; Midilli, Adnan (Inderscience Enterprises LTD, 2014)In this paper, theory, methodology and example application are developed and shown for a PW6000 high-bypass turbofan engine in terms of exergo-sustainable perspective. To obtain exergetic sustainability indicators, first, ... -
Sustainability Metrics of a Small Scale Turbojet Engine
Ekici, Selçuk; Şöhret, Yasin; Çoban, Kahraman; Altuntaş, Önder; Karakoç, Tahir Hikmet (Walter De Gruyter GMBH, 2018)Over the last decade, sustainable energy consumption has attracted the attention of scientists and researchers. The current paper presents sustainability indicators of a small scale turbojet engine, operated on micro-aerial ... -
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 ...