Search

Electrification of public transit bus has been rapidly promoted to reduce carbon dioxide (CO 2) emissions in China. It is essential to evaluate the impacts of battery electric buses (BEBs) adoption on real-world CO 2 emissions. This paper conducted a well-to-well (WTW) analysis to estimate the CO 2 emissions of BEBs in Shenzhen. First, we identified the regional inventory from an extensive review of research papers and data. Based on the mobile BEBs data, we explored the impacts of different driving conditions on WTW CO 2 emissions. Moreover, a sensitivity analysis was performed to assess the reliability of the WTW results. The experiments results show that BEBs can reduce WTW CO 2 emission by 21.8% relative to conventional diesel buses (CDBs) in 2018. And the WTW CO 2 emissions factor of BEBs has a negative correlation with stop headway and average speed. Notably, the impacts of CO 2 emissions reduction are more sensitive when the stop headway is over 2 km or the average speed is under 25 km/h. Besides, for the current power structure and charging technology in Guangdong, if the growths of the thermal power share and the charging loss are over 5%, BEB has more CO 2 emissions reduction benefits by improving the charging efficiency. Moreover, if the thermal power share and the charging loss are decreased, BEB can obtain more CO 2 emissions reduction potential by reducing the thermal share. The improvement of these two technologies can achieve close CO 2 emission reduction effects in other situations. Image 1 • The BEBs can reduce WTW CO 2 emission by 21.8% relative to CDBs in 2018. • The impacts of CO2 emissions reduction are more sensitive when the stop headway is over 2 km and the average speed is under 25 km/h. • If the growths of the thermal power share and the charging loss are over 5%, it's better to improve the charging efficiency to reduce CO 2 emissions. [ABSTRACT FROM AUTHOR]