Publication Date:
2019
Description:
〈p〉Publication date: October 2019〈/p〉
〈p〉〈b〉Source:〈/b〉 Transportation Research Part D: Transport and Environment, Volume 75〈/p〉
〈p〉Author(s): Anders Nordelöf, Mia Romare, Johan Tivander〈/p〉
〈div xml:lang="en"〉
〈h5〉Abstract〈/h5〉
〈div〉〈p〉This study explores life cycle environmental impacts of city buses, depending on the: (1) degree of electrification; (2) electricity supply mix, for chargeable options; and (3) choice of diesel or hydrogenated vegetable oil (HVO), a biodiesel, for options with combustion engine. It is a case study, which uses industry data to investigate the impact on climate change, a key driver for electrification, and a wider set of impacts, for average operation in Sweden, the European Union and the United States of America. The results show that non-chargeable hybrid electric vehicles provide clear climate change mitigation potential compared to conventional buses, regardless of the available fuel being diesel or HVO. When fueling with HVO, plug-in hybrid and all-electric buses provide further benefits for grid intensities below 200 g CO〈sub〉2〈/sub〉 eq./kWh. For diesel, the all-electric option is preferable up to 750 g CO〈sub〉2〈/sub〉 eq./kWh. This is the case despite batteries and other electric powertrain parts causing an increase of CO〈sub〉2〈/sub〉 emissions from vehicle production. However, material processing to make common parts, i.e. chassis, frame and body, dominates the production load for all models. Consequently, city buses differ from passenger cars, where the battery packs play a larger role. In regard to other airborne pollutants, the all-electric bus has the best potential to reduce impacts overall, but the results depend on the amount of fossil fuels and combustion processes in the electricity production. For toxic emissions and resource use, the extraction of metals and fossil fuels calls for attention.〈/p〉〈/div〉
〈/div〉
〈div xml:lang="en"〉
〈h5〉Graphical abstract〈/h5〉
〈div〉〈p〉〈figure〉〈img src="https://ars.els-cdn.com/content/image/1-s2.0-S1361920919302792-ga1.jpg" width="271" alt="Graphical abstract for this article" title=""〉〈/figure〉〈/p〉〈/div〉
〈/div〉
Print ISSN:
1361-9209
Electronic ISSN:
1879-2340
Topics:
Architecture, Civil Engineering, Surveying
,
Energy, Environment Protection, Nuclear Power Engineering
,
Geography
Permalink