Thermodynamic and thermoeconomic analyses and energetic and exergetic optimization of a turbojet engine
作者： Arman Ekrataleshian , Fathollah Pourfayaz , Mohammad Hossein Ahmadi
DOI: 10.1007/S10973-020-10310-Z
关键词: Thermal efficiency 、 Process engineering 、 Turbine 、 TOPSIS 、 Overall pressure ratio 、 Exergy 、 Combustion chamber 、 Environmental science 、 Exergy efficiency 、 Gas compressor
摘要: In this study, a thermal model for turbojet engine is proposed. Besides the engine’s performance, cost flow rate of each component evaluated by performing energetic, exergetic and exergoeconomic analyses. The compressor pressure ratio (πAC), flight Mach number (Ma) turbine inlet temperature (TIT) are three operating variables, which affect performance whole system. Therefore, sensitivity analysis carried out to survey effect these variables on objective functions (i.e., energy efficiency, exergy destruction). It found that there some contradictions between efficiency destruction, increment in TIT increases, while destruction decreases. an optimization should be applied presented results show highest unit cost, 34.96 GJ h−1, 34.85 US$ GJ−1 437.37 US$ h−1 occur combustion chamber, compressor’s outlet chamber stream, respectively. energetic solution obtained as Pareto frontier. Final decision-making methods such TOPSIS, LINMAP employed choosing optimal solution. Design points TOPSIS having 65.86%, 66.95% 12.51 GJ h−1, 12.65 GJ h−1
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