Environmental and enviroeconomic analyses of two different turbofan engine families considering landing and take-off (LTO) cycle and global warming potential (GWP) approach

Aygün, Hakan; Çalışkan, Hakan

doi:10.1016/j.enconman.2021.114797

Cited by 21 publications

(4 citation statements)

References 18 publications

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“…This encourages countries and commercial enterprises to use renewable energy, which is cleaner energy source. Carbon pricing encourages airlines to use new aircraft with more efficient engines (Aygun and Caliskan, 2021). Enviroeconomic cost (eco-cost) values are given in Table 5 for each pollutant emission.…”

Section: Methodsmentioning

confidence: 99%

Environmental and enviroeconomic impacts of COVID-19 pandemic on commercial flights

Akyüz

2022

AEAT

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Purpose The purpose of this study is to determine and compare the total and per passenger HC, CO, NOx and CO2 emissions from aircraft landing and takeoff (LTO) cycle before and during the COVID-19 pandemic. In addition, it is aimed to determine the global warming potential (GWP), environmental impacts (EIs) and enviroeconomic cost (eco-cost) of these emissions in total and per passenger. Design/methodology/approach Analyses were carried out with the help of the International Civil Aviation Organization’s Engine Emission Databank, using real flight data recorded by the airport authority. Findings During the COVID-19 pandemic, total pollutant emissions (HC, CO, NOx and CO2) decreased between 23.7% and 30.8% compared with the pre-pandemic period. In addition, per passenger pollutant emissions increased during the pandemic. Compared with the pre-pandemic period, GWP, EI and eco-cost values decreased by 24.1%, 23.89% and 23.93%, respectively, in the pandemic. However, the per passenger GWP, EI and eco-cost values increased by about 10% compared with the pre-pandemic period. Practical implications This study reveals the effects of COVID-19 in terms of EIs and environmental costs caused by aircraft in the LTO cycle. Originality/value The originality of this study is to calculate the pollutant emissions caused by aircraft in the LTO cycle with real flight data and to reveal the effects of the COVID-19 pandemic. The novelty of this study is the determination and comparison of total and per passenger pollutant emissions, GWP, EI and eco-cost before and during the pandemic.

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Section: Methodsmentioning

confidence: 99%

Environmental and enviroeconomic impacts of COVID-19 pandemic on commercial flights

Akyüz

2022

AEAT

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“…The H 2 fuelled system benefits lower fuel consumption by 63.83%, thereby lower environmental impact sacrificing slightly energy efficiency and specific thrust of the engine. Lastly, Aygun and Caliskan [ 15 ] addressed environmental and enviroeconomic modeling of two different families of turbofan engines. The model accuracy of global warming potential index is obtained as 0.9956 of R 2 for family 1 engines and 0.9664 of R 2 for family 2 engines where bypass ratio and overall pressure ratio are considered as model inputs.…”

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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“…The exergy method has been successfully applied in analyzing a series of engine cycle parameters. Some discovered that commercial turbofan engines with high bypass and overall pressure ratio showed prominent advantages considering energy efficiency and environmental costs [22]. Taking the exergetic parameters as the target, the cycle parameters of the PW-4000 engine could be optimized to improve the efficiency of energy utilization [23].…”

Section: Introductionmentioning

confidence: 99%

Exergetic Effects of Cooled Cooling Air Technology on the Turbofan Engine during a Typical Mission

Zhuang

Dong

et al. 2022

Energies

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The cooled cooling air technology (CCA technology) shows expected performance in solving the growing thermal challenge for advanced aero engines by reducing the temperature of cooling air. The effect of CCA technology on the overall propelling performance with or without adjusting cycle parameters is controversial. Based on this, both the energy and exergy methods have been adopted to elaborate the specific mechanisms of the above energy utilization discrepancy. As a result, the scheme of CCA technology without optimizing cycle parameters has lower propelling work and efficiency with the total exergy destruction increasing 0.5~2%. Oppositely, as for the scheme of CCA with meliorated cycle parameters, the propelling efficiency improved by around 2~4% with total exergy destruction reduced by 1~3.5%. By analyzing the distribution of exergy destruction, the avoidable and unavoidable exergy destruction caused by the combustion chamber, compressors, and turbines accounts for the largest proportion, which indicates that more attention needs to be paid in the future. During the whole flight mission, the percentage of exergy destruction is much higher in supersonic, subsonic cruise, combat, and escape conditions. In conclusion, the improvement of cycle parameters to reduce the exergy destruction should be considered when introducing CCA technology.

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Environmental and enviroeconomic analyses of two different turbofan engine families considering landing and take-off (LTO) cycle and global warming potential (GWP) approach

Cited by 21 publications

References 18 publications

Environmental and enviroeconomic impacts of COVID-19 pandemic on commercial flights

Environmental and enviroeconomic impacts of COVID-19 pandemic on commercial flights

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

Exergetic Effects of Cooled Cooling Air Technology on the Turbofan Engine during a Typical Mission

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