Energy and exergy efficiencies in the Chinese transportation sector, 1980–2009

The energy-environment efficiency of road and railway sectors in China: Evidence from the provincial level

“…The average energy-environment efficiency on the provincial level is between 0.9758 and 0.9951 in the road sector, and 0.8665 and 0.9887 in the railway sector. As a whole, the average energy-environment efficiency of the railway sector is 0.9307, which is lower than that in the road sector (0.9815), which is in accordance with the results by Zhang et al (2011a). In fact, the CO 2 emission coefficient of railway sector is higher than that of road sector (see Fig.…”

“…7, 8 For example, the government urged to optimize energy consumption structure in transportation sector and requested that the energy consumption of unit turnover drop from 7.9 kilogram coal equivalent/hundred ton-kilometer (kce/htk) in 2010 to 7.5 kce/htk in 2015. Besides, in this study, the energy-environment efficiency changing tendency of China's road sector is similar to the efficiency changing tendency of the whole Chinese transportation sector described by Zhang et al (2011a), which is primarily due to the fact that road sector takes up the largest CO 2 emissions in China's transportation sector.…”

“…For example, Chang et al (2013) analyze the environment efficiency of China's transportation sector through a non-radial DEA model with slacksbased measure (SBM), and their results show that the environment efficiency is less than 50% in most provinces. Zhang et al (2011a) make study on the energy and exergy efficiencies of China's each transportation sector during 1980-2009, from which they acquire the average overall energy and exergy efficiencies, with the values 21.22% and 19.95%, respectively. Zarifi et al (2013) investigate the energy and exergy efficiencies of Iran's transportation sector, and find that the energy and exergy efficiencies decreased from 22.…”

Reviewing Nordic transport challenges and climate policy priorities: Expert perceptions of decarbonisation in Denmark, Finland, Iceland, Norway, Sweden

“…Transportation and mobility use significant amounts of energy, and those sectors account for a substantial amount of greenhouse gas emissions and other energy-related externalities (Pan et al 2018;Sonmez et al 2017;Mohammadi and Taylo 2017;Zhang et al 2011;Flórez-Orrego et al 2015;Malla 2014;Ridjan et al 2014;Usón et al 2011). Also, the electrification of passenger transport (the merging of energy and transport systems) offers many opportunities and is an emerging but core theme in this journal.…”

Comparação termodinâmica e ambiental (emissões de CO2) das rotas de produção e utilização de combustíveis veiculares derivados de petróleo e gás natural, biocombustíveis, hidrogênio e eletricidade (veículos elétricos).

“…Diferentes autores reportam eficiências globais de conversão para o subsetor rodoviário que variam entre 12 e 22% (DINCER et al, 2004;EDIGER;ÇAMDAL, 2007;ZHANG et al, 2011); no entanto, nenhuma análise que sustente dito valor é apresentada nesses estudos. A maioria desses trabalhos aborda a análise da conversão de energia e a definição da eficiência energética no setor de transporte, considerado somente a energia necessária para atingir uma velocidade média característica (i.e., variação da energia cinética), sem levar em conta a energia investida para vencer as forças de resistência aerodinâmica e à rolagem.…”