Thermodynamic-based environmental and enviroeconomic assessments of a turboprop engine used for freight aircrafts under different flight phases

Dinç, Ali; Çalışkan, Hakan; Ekici, Selçuk; Şöhret, Yasin

doi:10.1007/s10973-022-11486-2

Cited by 17 publications

(4 citation statements)

References 55 publications

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“…Dinc et al [34] introduced air inlet air cooling with a refrigeration system to the same gas turbine and obtained the normal ambient temperature power values with a PSFC improvement of 5.2% compared to the uncooled case. Additional studies on engine emissions can be found in the literature [35][36][37][38].…”

Section: Of 19mentioning

confidence: 99%

Effect of Refrigerated Inlet Cooling on Greenhouse Gas Emissions for a 250 MW Class Gas Turbine Engine

Dinc,

Mamedov,

Duran

et al. 2023

Aerospace

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In this study, the effect of inlet air cooling on greenhouse gas (GHG) emissions and engine performance for a land-based gas turbine engine was investigated under varying ambient temperatures (15–55 °C). The study aimed to reduce GHG emissions while improving output power and fuel efficiency during hot weather operating conditions. For illustrative purposes, a representative gas turbine engine model, approximating the 250 MW class General Electric (GE) engine, was analyzed in a simple cycle. A refrigeration process was integrated with a turboshaft gas turbine engine to chill the incoming air, and the power required for cooling was extracted from the gas turbine’s output power. This mechanical chiller was assumed to provide a 15 °C inlet air temperature. Without inlet air cooling, at 55 °C ambient temperature, the engine’s power output was calculated to decrease by 15.06%, while power-specific fuel consumption and GHG emissions increased by 6.09% and 5.84%, respectively. However, activating the refrigeration or cooling system in the inlet made it possible to mitigate most of the adverse effects of hot weather on the engine’s performance and GHG emissions. Therefore, with inlet air cooling, the power output loss reduces to 3.28%, indicating an 11.78% recovery compared to the 15.06% loss without cooling. Similarly, the rise in power-specific fuel consumption caused by high ambient temperature decreases from 6.09% to 3.43%, reflecting a 2.66% improvement. An important finding of the study is that with inlet air cooling, the increase in GHG emissions reduces from 5.84% to 3.41%, signifying a 2.43% improvement on a hot day with a temperature of 55 °C.

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Section: Of 19mentioning

confidence: 99%

Effect of Refrigerated Inlet Cooling on Greenhouse Gas Emissions for a 250 MW Class Gas Turbine Engine

Dinc,

Mamedov,

Duran

et al. 2023

Aerospace

Self Cite

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“…In addition, the authors emphasized that due to high exergy destruction, it is necessary to focus on the CC component to improve the first law and second law efficiency ratios. Dinc et al [13] analyzed a turboprop engine using environmental, economic and thermodynamic perspective. Exergy recovery potentials were calculated in different flight scenarios.…”

Section: Introductionmentioning

confidence: 99%

A Commercial Turbofan Engine Modeling and Exergy Analysis

KALKAN

2024

KONJES

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Turbofan engines are one of the most common types of engines used in modern commercial and military aircraft due to their efficiency and performance characteristics. In this study, a thermodynamic model is generated using GasTurb 14 software for a commercial two-spool, unmixed flow, and booster turbofan engine (CFM56-5A3) used in Boeing A320-212. Besides, an exergy analysis of the modeled turbofan engine is performed. Exergy performance criteria such as exergy efficiency, exergy development potential, exergy destruction ratio, productivity lack ratio, and fuel depletion ratio are evaluated for the engine components. In addition, how bypass ratio (BPR) affects net thrust and specific fuel consumption (SFC) for the modeled turbofan engine is investigated. As a result, the net thrust and SFC values of the modeled engine and the actual engine are overlapped with 14.0% and 7.2% deviation, respectively. The maximum exergy efficiency occurs at the high-pressure turbine as 0.992. When the bypass ratio is minimum, the maximum net thrust and SFC occur as 62.24 kN and 24.08 g kN-1 s-1, respectively. High pressure turbine has the minimum exergy development potential of 1528.5 kW.

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“…However, its environmental impact index (mPts kWh -1 ) is determined relatively high with 49.23 mPts kWh -1 . Dinc et al [ 12 ] elaborated flight cycle of a turboprop engine including five phases point of view environmental effect. Although take-off phase has relatively the highest fuel consumption, minimum environmental parameter and thereby minimum CO 2 price was found to be 73.08 kgCO 2 day_cycle −1 and 8.48 € day_cycle −1 , respectively due to having the lowest time in mode.…”

Section: Introductionmentioning

confidence: 99%

Optimized modeling of energy and environmental metrics of mixed flow turbofan engine used regional aircraft

Ucar

Aygün

Tanyeri

2023

J Therm Anal Calorim

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As a kind of gas turbine engines, turbofan engines have powered a number of aero-vehicles in aviation sector. The necessity of turbofan with higher energy efficiency has been greatly drawn attention since these are operating dependent to fossil fuels. In this study, energy and emission metrics of fifty-one mixed flow turbofan engines (MFTE) with different bypass ratio, overall pressure ratio and fuel flow are modeled with multi-regression (MR) method. The obtained models are subjected to metaheuristic approaches involving genetic algorithm (GA) and simulated annealing (SA) so as to decrease error of the models. According to MR findings, rated thrust of MFTEs is estimated with 1.4877 of minimum square error (MSE) whereas GA and SA make it lower as 1.3404 and 1.2524, respectively. On the other hand, NO x emission index of MFTEs is predicted with relatively low coefficient of determination (R 2 ) as 0.8620. However, its accuracy is enhanced to 0.8633 (with GA) and 0.8655 (with SA). Finally, exergy efficiency of MFTEs is estimated the highest model correctness with GA. Namely, R 2 of the model is computed as 0.9280 with GA and 0.9277 with SA. Without applying these methods, its R 2 is obtained as 0.9263 with MR. When considering these outcomes, thanks to modeling and optimization methods, prediction of performance and emission indexes of mixed flow turbofan engines could be performed with lower error values. It is thought that the study helps in prediction of environmental effect regarding turbofan engines that are utilized at busy airports.

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Thermodynamic-based environmental and enviroeconomic assessments of a turboprop engine used for freight aircrafts under different flight phases

Cited by 17 publications

References 55 publications

Effect of Refrigerated Inlet Cooling on Greenhouse Gas Emissions for a 250 MW Class Gas Turbine Engine

Effect of Refrigerated Inlet Cooling on Greenhouse Gas Emissions for a 250 MW Class Gas Turbine Engine

A Commercial Turbofan Engine Modeling and Exergy Analysis

Optimized modeling of energy and environmental metrics of mixed flow turbofan engine used regional aircraft

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