基于发动机与飞机的藻基航空燃料全生命周期分析

讨论了基于发动机类别及其飞机的藻基航空替代燃料与常规航空燃料对全生命周期的影响。基于GREET（the greenhouse gases,regulated emissions,and energy use in transportation）模型,依据平均载荷、最大航程,将民航客机分为单通道窄体、双通道中型、双通道大型、巨型、支线和公务机等6类。起飞、爬升、进近、滑行、巡航过程的燃料消耗及排放采用国际民用航空组织、美国NASA-AAFEX实验、欧洲EASA适航条例提供的数据。计算了6类发动机-飞机的气体排放、能量消耗情况。在双通道大型客机中藻基航空替代燃料制备过程的温室气体排放仅为0.2351g/(kg·km),原因为该类客机与小型飞机相比有更好的发动机效率和运输效率。然而由于起飞降落过程排放比例较大,单通道窄体客机在航程上对温室气体排放变化更为敏感。 

Life cycle assessment of algae based aviation fuel on basis of engine type and related aircraft

Consolidated discussion of life cycle assessment on algae based aviation fuel in combustion emissions on the basis of engine type and related aircraft was conducted by comparing with conventional jet fuel. Using the GREET （the greenhouse gases,regulated emissions,and energy use in transportation） model, passenger aircrafts were divided into six classes including single aisle, small twin aisle, large twin aisle, large quad, regional jet, and business jet. Each aircraft class was characterized by its average payload, potential flight range, and fuel consumption and emissions during landing, takeoff, taxiing, climbing referred to in the database of NASA-AAFEX, EASA, and CAAC. Also the emissions and energy input were discussed. The pump-to-wheel stage of algae based jet fuel in large twin aisle aircraft shows the least amount of greenhouse gases emission at 0.2351g/(kg·km) because larger aircraft has lower greenhouse gases emissions values than smaller aircraft due to higher engine efficiency and higher payload, however single aisle aircraft appears to be more sensitive to greenhouse gases emission in flight range than larger aircraft due to higher contribution of landing and takeoff.