Browsing by Author "Yuksel, Burak"

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Citation - WoS: 9
Citation - Scopus: 13
Assessing Exergy-Based Economic and Sustainability Analyses of a Military Gas Turbine Engine Fueled with Various Fuels
(MDPI AG rasetti@mdpi.com Postfach Basel CH-4005, 2020) Burak Yuksel; Huseyin Gunerhan; A. Hepbasli; Yuksel, Burak; Gunerhan, Useyin; Hepbasli, Arif; Gunerhan, Huseyin
This research put forth exergy-based economic and sustainability analyses of a (J85-GE-5H) military turbojet engine (TJE). Firstly sustainability conventional exergoeconomic and advanced exergoeconomic cost analyses were executed utilizing kerosene fuel according to real engine working circumstances. The engine was likewise investigated parametrically considering H2 fuel utilization. The sustainable economic analysis assessment of the TJE was finally actualized by comparing the acquired outcomes for both fuels. The entire engine's unit exergy cost of product ( ) cPr with kerosene was determined 76.45 $/GJ for the military (MIL) process mode (PM) whereas it was computed 94.97 $/GJ for the afterburner (AB) PM. Given the use of H2 the cPr increased to 179 and 288 $/GJ for the aforementioned two modes seriatim. While the sustainability cost index (SCI) values were obtained 52.86 and 78.84 $/GJ for the MIL and AB PM seriatim they became 128 and 244 $/GJ when considering H2. Consequently the higher exergy demolitions occurring in the afterburner exhaust duct (ABED) and combustion chamber (CC) sections led to higher exergy destruction costs in the TJE. However the engine worked less cost efficient with H2 fuel rather than JP-8 fuel because of the higher cost value of fuel. © 2020 Elsevier B.V. All rights reserved.
Citation - WoS: 21
Citation - Scopus: 24
Comparative performance metric assessment of a military turbojet engine utilizing hydrogen and kerosene fuels through advanced exergy analysis method
(MDPI AG rasetti@mdpi.com Postfach Basel CH-4005, 2020) Burak Yuksel; Ozgur Balli; Huseyin Gunerhan; A. Hepbasli; Yuksel, Burak; Balli, Ozgur; Hepbasli, Arif; Gunerhan, Huseyin
This study dealt with evaluating the (J85-GE-5H) military turbojet engine (TJE) in terms of exergetic and advanced exergetic analyses at Military (MIL) and Afterburner (AB) process modes by utilizing kerosene (JP-8) and hydrogen (H2) fuels. First exergy and advanced exergy analyses of the engine were performed using JP-8 fuel as per actual engine operating conditions. These analyses of the turbojet engine using hydrogen fuel were also examined parametrically. The performance evaluation of the engine was lastly executed by comparing the obtained results for both fuels. Based on the parametric studies undertaken the entire engine’s exergetic efficiency with JP-8 was reckoned 30.85% at the MIL process mode while it was calculated as 16.98% at the AB process mode. With the usage of H2 the efficiencies of the engine decreased to 28.62% and 15.33% for the above mentioned two modes respectively. As the supreme exergy destructions occurred in the combustion chamber (CC) and afterburner exhaust duct (ABED) segments the new technological developments should be considered to design more efficient engines. As a result the engine worked less efficiently with hydrogen fuel due to the enhancement in exergy destructions. Conversely the greenhouse gas (GHG) emission parameters lessened with the utilization of H2 fuel. © 2020 Elsevier B.V. All rights reserved.