电动汽车在应对气候变化方面的潜在益处。
Hidden benefits of electric vehicles for addressing climate change.
作者信息
Li Canbing, Cao Yijia, Zhang Mi, Wang Jianhui, Liu Jianguo, Shi Haiqing, Geng Yinghui
机构信息
1] College of Electrical and Information Engineering, Hunan University, Changsha 410082, China [2] Centre for Systems Integration and Sustainability, Michigan State University, RM 115, S. Harrison RD, East Lansing, MI, 48823, USA.
College of Electrical and Information Engineering, Hunan University, Changsha 410082, China.
出版信息
Sci Rep. 2015 Mar 19;5:9213. doi: 10.1038/srep09213.
There is an increasingly hot debate on whether the replacement of conventional vehicles (CVs) by electric vehicles (EVs) should be delayed or accelerated since EVs require higher cost and cause more pollution than CVs in the manufacturing process. Here we reveal two hidden benefits of EVs for addressing climate change to support the imperative acceleration of replacing CVs with EVs. As EVs emit much less heat than CVs within the same mileage, the replacement can mitigate urban heat island effect (UHIE) to reduce the energy consumption of air conditioners, benefitting local and global climates. To demonstrate these effects brought by the replacement of CVs by EVs, we take Beijing, China, as an example. EVs emit only 19.8% of the total heat emitted by CVs per mile. The replacement of CVs by EVs in 2012 could have mitigated the summer heat island intensity (HII) by about 0.94°C, reduced the amount of electricity consumed daily by air conditioners in buildings by 14.44 million kilowatt-hours (kWh), and reduced daily CO2 emissions by 10,686 tonnes.
关于电动汽车（EVs）取代传统汽车（CVs）的进程应推迟还是加速，存在着日益激烈的争论，因为电动汽车在制造过程中成本更高且污染更大。在此，我们揭示了电动汽车在应对气候变化方面的两个潜在益处，以支持以电动汽车取代传统汽车的迫切加速行动。由于电动汽车在相同里程内的热量排放远低于传统汽车，这种取代能够减轻城市热岛效应（UHIE），从而降低空调的能源消耗，对局部和全球气候都有益处。为了证明电动汽车取代传统汽车所带来的这些影响，我们以中国北京为例。电动汽车每英里的热量排放仅为传统汽车总热量排放的19.8%。2012年若用电动汽车取代传统汽车，可使夏季热岛强度（HII）降低约0.94°C，减少建筑物内空调每日耗电量1444万千瓦时（kWh），并减少每日二氧化碳排放量10686吨。
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