英文题目：Minimising emissions from flights through realistic wind fields with varying aircraft weights

       中文题目：通过考虑实际的风场和不同飞机重量来减少飞行排放

       作者：Cathie A. Wells , Paul D. Williams , Nancy K. Nichols , Dante Kalise , Ian Poll

       关键词：Dynamic programming;Transatlantic aviation routing;Fuel-minimal;Aircraft;Emissions reduction

       原文链接：https://doi.org/10.1016/j.trd.2023.103660

       期刊名称：Transportation Research Part D: Transport and Environment

       期刊分区：JCR Q1

       IF: 7.6

  

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       摘要：The international aviation community has agreed to advance actions to reduce CO₂ emissions. Adopting more fuel-efficient routes will achieve this goal quickly and economically. Full satellite coverage of transatlantic flight routes is now a reality, allowing us to consider moving from the Organised Track Structure to Trajectory-Based Operations. Here, fuel-optimal trajectories through wind fields from a global atmospheric re-analysis dataset are found using dynamic programming. The control variables of aircraft headings and airspeeds are varied to find freetime, fuel-minimal routes. Aircraft fuel consumption is modelled with a new model-specific fuel-burn function, which incorporates aircraft mass reductions as fuel is burned. From 1 December 2019 to 29 February 2020, fuel use from simulated routes is compared with fuel estimates based on recorded flight data. Results demonstrate that an average fuel reduction of 4.2% is possible without significant changes to flight duration. This equates to a reduction of 16.6 million kg of CO2 emissions. Therefore, free-time, fuel-minimal routes have the potential to offer substantial fuel and emissions savings.

 

 

 

       英文题目：Calculation and Analysis of New Taxiing Methods on Aircraft Fuel Consumption and Pollutant Emissions

       中文题目：飞机燃料消耗和污染物排放的新型滑行方法的计算与分析

       作者：Feng Cao, Tie-Qiao Tang, Yunqi Gao, Feng You and Jian Zhang

       关键词：Airport ground operations management;New taxiing methods;Fuel consumption;Pollutant emissions;Carbon peaking

       原文链接：https://doi.org/10.1016/j.energy.2023.127618

       期刊名称：Energy

       期刊分区：JCR Q1

       IF: 8.9

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       摘要：The rapid growth of the civil aviation industry results in significant carbon dioxide (CO2) emissions. Aircraft contribute to the degradation of near-airport air quality during the landing and take-off (LTO) cycle. Several new taxiing methods are used to reduce fuel consumption and emissions of aircraft during the taxiing phase. This study compares various taxiing methods and analyzes the flight operation procedures in different taxiing methods, followed by the local environment impacts assessment of these methods. Based on actual operational data from Xining International Airport, China, comparisons of fuel consumption and pollutant emissions are performed for five taxiing methods: full-engine taxiing, single-engine taxiing, dispatch towing, onboard systems and optimization of surface traffic management. The results show that new taxiing methods can reduce both fuel consumption and pollutant emissions compared to the traditional taxiing method, i.e., full-engine taxiing. Emissions reduction effect of new taxiing methods varies by aircraft type. Onboard systems show the best performance in energy saving and emissions reduction. In addition, the carbon peaking potential of each taxiing method is explored by projecting carbon emissions from 2024-2035 using new taxiing methods. The projections show that new taxiing methods must be combined with other carbon abatement technologies to achieve carbon peaking.

 

 

       英文题目：Civil aviation emissions in Argentina

       中文题目：阿根廷的民航排放

       作者：S. Enrique Puliafito

       关键词：Civil aviation ;Atmospheric emissions ;CORSIA program ;Aviation sustainable fuel ;Argentina

       原文链接：https://doi.org/10.1016/j.scitotenv.2023.161675

       期刊名称：Science of the Total Environment

       期刊分区：JCR Q1

       IF：9.8

 

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       摘要：The impact of aviation on climate change is reflected in increasing emissions of CO₂ and other pollutants from fuel burning emitted at high altitudes, representing 2.9 % of total Greenhouse gases (GHG) emissions in 2019. However, mitigations options for decarbonization of aviation are difficult to implement given operational safety, technology maturity, energy density and other constraints. One alternative for mitigation is the use of certified sustainable aviation

fuel (SAF) with lower carbon intensity than conventional jet fuel (CJF). This research presents an inventory of Argentine civil aviation emissions for its domestic and international flights, and analyzes the possibility of supplying SAF as a mitigation strategy given its abundant biomass production. Argentine aviation activity is presented as a monthly 4D (latitude, longitude, altitude and time) spatial inventory for the interval 2001–2021, based on origin and destination city pairs, aircraft types and airlines. Fuel consumption and pollutant emissions were calculated for landing-and-take-off and cruise phases. Monthly domestic ranged from 67 to 179 kt CO_2eq (2001–2019). Annual peak values occurred in 2019 consuming 560 kt CJF and direct emitting of 1.77 Mt CO_2eq. While Revenue-Passenger-Kilometer (RPK) grew almost 4 times (4.18 × 10⁹ in 2001 to 16.42 × 10⁹ in 2019), the number of flights changed only 1.5 times (from 98,000 in 2002 to 152,000 in 2019). The main efficiency indexes varied from 97 t CJF/RPK, 308 gCO2eq/RPK to 34 t CJF/RPK, 107 gCO_2eq/RPK between 2001 and 2019, respectively, showing an average annual improvement of 3.5 % due to partial fleet renewal, especially from 2015 onwards. Emissions of other pollutants for 2019 reached total values of CO 14.14 kt; NO_x 6.77 kt; PM tot 55.12 kt. For the period 2001–2019, international aviation consumed between 1 Mt - 1.5 Mt CJF, directly emitting between 3.30 and 4.80 Mt of CO_2eq; RPKs went from 6.234 × 10⁹  to 20.524 × 10⁹ ; the efficiency indices ranged from 529 to 240 gCO_2eq/RPK. The most important changes occurred with an optimization of routes and number of flights and the replacement of the four-engines (B747, A380) by more efficient twin-engines (B777, A330) aircraft. Argentina is not required to any offsetting regulatory program due to its small aviation market (approx. 0.22 % global market in 2019), nor has to date certified SAF production pathways, nevertheless it has potential for SAF availability based on actual biofuels production (ethanol, biodiesel and soybean oil) and biomass feedstock's existences. In this sense this studies proposes that 2019 domestic fuel consumption could be supplied using 79 % exportable amounts of sugarcane ethanol (257 ± 53 kt) (by Ethanol to Jet ETJ) and 34 % of exportable soybean oil (1079 ± 160 kt) (by hydroprocessed esters and fatty acids- HEFA) pathways. For this scenario average GHG emissions reached 1.321 ± 0.115 Mt CO_2eq; which would imply a 62 % of the current emission value using CJF (2.17Mt CO_2eq), or savings of about 838 kt CO_2eq (38 %). At the 2019 level of harvest and biofuel production, up to 1.4 Mt of SAF could be produced from sugarcane ethanol/ETJ and soybean oil/HEFA mitigating up to 1.8 MtCO_2eq. A 35 kt CO_2eq annual sectoral national mitigation strategy could be reached by using 14 kt of SAF.