Browsing by Author "Aras, Haydar"

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Citation - WoS: 67
Citation - Scopus: 70
Advanced exergoeconomic analysis of a trigeneration system using a diesel-gas engine
(PERGAMON-ELSEVIER SCIENCE LTD, 2014) Emin Acikkalp; Haydar Aras; Arif Hepbasli; Aras, Haydar; Hepbasli, Arif; Açikkalp, Emin
In this paper a trigeneration system was analyzed using an advanced exergy analysis. The trigeneration system is located in the Eskisehir Industry Estate Zone in Turkey. The exergy efficiency of the system is 0.354 and the total exergy destruction of the system is 16.695 MW. The total exergoeconomic factor of the system is 0.069 and unit electricity generating cost is 56.249 $/GJ. The exergy destruction and investment cost rates within the facility's components are generally divided into four parts: endogenous exogenous avoidable and unavoidable exergy destruction. Through this analysis the improvement potential of the costs of the components and the investment and the overall system were determined along with the economic relationships between the components. The results of the analysis indicate that the combustion chamber high pressure steam turbine and condenser exhibit significant economic improvement potential because of their high exergy destruction costs. Similarly the heat recovery steam generator and condenser exhibit significant potential to reduce their investment costs. In addition suggestions for improving system economical parameters are provided. (C) 2014 Elsevier Ltd. All rights reserved.
Citation - WoS: 62
Citation - Scopus: 66
Advanced exergoeconomic analysis of an electricity-generating facility that operates with natural gas
(Pergamon-Elsevier Science Ltd, 2014) Emin Açıkkalp; Haydar Aras; A. Hepbasli; Aras, Haydar; Hepbasli, Arif; Açikkalp, Emin
This paper presents an advanced exergy analysis of an electricity generation facility in the Eskisehir Industry Estate Zone in Turkey. The total electricity generation rate is approximately 55 MW. The exergy efficiency of the system is 0.402 and the total exergy destruction rate of the system is 78.242 MW. The unit exergy cost of electrical power that is generated by the system is 25.660 $/GJ and the total exergoeconomic factor of the system is 0.247. Advanced exergetic and exergoeconomic analyses were applied to the considered system. The advanced exergoeconomic analysis shows that the combustion chamber the high-pressure steam turbine and the condenser have great economic improvement potential because of their high exergy destruction cost rates. Similarly the heat recovery steam generator and the condenser have significant potential because of their investment costs. In addition suggestions to improve the system economical parameters are provided. Finally it can be concluded that relations between the components are strong. © 2013 Elsevier Ltd. All rights reserved. © 2013 Elsevier B.V. All rights reserved.
Citation - WoS: 38
Citation - Scopus: 40
Advanced exergoenvironmental assessment of a natural gas-fired electricity generating facility
(PERGAMON-ELSEVIER SCIENCE LTD, 2014) Emin Acikkalp; Haydar Aras; Arif Hepbasli; Aras, Haydar; Hepbasli, Arif; Açikkalp, Emin
This paper presents conventional and advanced exergoenvironmental analyses of an electricity generation facility located in the Eskisehir Industry Estate Zone Turkey. This facility consists of gas turbine and steam cycles which generate electrical power of approximately 37 MW and 18 MW respectively. Exergy efficiency of the system is 0.402 and exergy destruction rate of the system is 78.242 MW. Unit exergy cost of electrical power generated by the system is 25.66 $/GJ and total exergoeconomic factor of the system is 0.279. Conventional exergy analysis method was applied to the system first. Next exergy environmental impacts of exergy destruction rate within the facility's components were divided into four parts generally as endogenous exogenous avoidable and unavoidable environmental impact of exergy destruction rate. Through this analysis improvement potential of the environmental impacts of the components and the overall system and the environmental relations between the components were then determined. Finally exergoenvironmental factor was determined as 0.277 and environmental impact of the electricity was 8.472 (Pts/h). The system has 33% development potential for environmental impacts while its components have weak relations because of big endogenous parts of environmental impacts (80%). It may be concluded that advanced exergoenvironmental analysis indicated that priority should be given to the GT and CC while defining the improvement strategies. (C) 2014 Elsevier Ltd. All rights reserved.
Citation - WoS: 38
Citation - Scopus: 41
Advanced exergy analysis of a trigeneration system with a diesel-gas engine operating in a refrigerator plant building
(Elsevier Ltd, 2014) Emin Açıkkalp; Haydar Aras; A. Hepbasli; Aras, Haydar; Hepbasli, Arif; Açikkalp, Emin
In this paper a trigeneration system is analyzed using an advanced exergy analysis. The trigeneration system is located in the Eskisehir Industry Estate Zone in Turkey. The exergy efficiency of the system was found to be 0.354 while the total exergy destruction rate of the system was 16.695 MW. The purpose of this study is to determine the improvement potential of the system. The exergy destruction within the components of the facility is divided into four parts: endogenous exogenous avoidable and unavoidable exergy destruction. The components of the trigeneration system have strong relationships with each other since the endogenous exergy destruction of the components is smaller than the exogenous exergy destruction. The avoidable exergy destruction rates are generally greater than the unavoidable ones. Thus the trigeneration system possesses a high potential for improvement. This analysis indicates that from a thermodynamic perspective the turbo air compressor is the most important component in the system. Through the advanced exergy analysis information about the relationships among the system components as well as the potential for further improvements may be provided in more detail. © 2014 Elsevier B.V. © 2014 Elsevier B.V. All rights reserved.
Citation - WoS: 75
Citation - Scopus: 80
Advanced exergy analysis of an electricity-generating facility using natural gas
(PERGAMON-ELSEVIER SCIENCE LTD, 2014) Emin Acikkalp; Haydar Aras; Arif Hepbasli; Aras, Haydar; Hepbasli, Arif; Acikkalp, Emin
This paper deals with the performance assessment of an electricity generation facility located in the Eskisehir Industry Estate Zone in Turkey using advanced exergy analysis method. The exergy efficiency of the system is determined to be 40.2% while the total exergy destruction rate of the system is calculated to be 78.242 MW. The exergy destruction rate within the facility's components is divided into four parts namely endogenous exogenous avoidable and unavoidable exergy destruction rates. Through this analysis the improvement potentials of both the components and the overall system along with the interactions between the components are deducted based on the actual operational data. The analysis indicates that the combustion chamber the high pressure steam turbine and the condenser have high improvement potentials. The relations between the components are weak because of the ratio of the endogenous exergy rates of 70%. The improvement potential of the system is 38%. It may be concluded that one should focus on the gas turbine and combustion chamber for improving the system being the most important components of the system. (C) 2014 Elsevier Ltd. All rights reserved.