Calculation of greenhouse gas emissions of urban rail transit systems in China

IF 1.5 4区工程技术 Q3 ENGINEERING, CIVIL

Proceedings of the Institution of Civil Engineers-Engineering Sustainability Pub Date : 2023-10-18 DOI:10.1680/jensu.23.00001

Hao Guo, Liyuan Zhao, Shuo Zang, Yun Wei

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Abstract

In China, the total energy consumption and greenhouse gas (GHG) emissions will reach considerable levels based on the current speed of urban rail transit system development. Based on the life-cycle assessment theory, this research constructs an urban rail transit system GHG emission assessment method, calculates emission outputs based on resource inputs from actual investigated data and makes a quantitative analysis of GHG emissions. The results show that in recent years, the GHG emission of urban rail transit construction and operation in China is between 2000 × 10 4 and 4200 × 10 4 tonnes of carbon dioxide equivalent (tCO 2 e) per year. The proportions of the construction and operational phases in this emission are 57 and 43%, respectively. In the construction phase, the GHG emission intensity per unit mileage of shield tunnels and per unit area of stations is about 1.3 × 10 4 tCO 2 e/km and 3.71 × 10 4 tCO 2 e/ha, respectively. In the operational phase, the GHG emission intensity per unit trip is 0.084 kg carbon dioxide equivalent/passenger-km. The entire life-cycle GHG emission per kilometre of urban rail transit systems is 11.69 × 10 4 tCO 2 e (with a service life of 50 years) in China. The construction phase and operation phase generated about 18.73 and 81.27% of this emission, respectively. The preliminary conclusions of this study may help shed light on the emission reduction potential of urban rail transit systems and the emission reduction targets in China.

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中国城市轨道交通系统温室气体排放计算

在中国，根据目前城市轨道交通系统的发展速度，总能耗和温室气体排放将达到相当大的水平。基于全生命周期评价理论，构建城市轨道交通系统温室气体排放评价方法，从实际调查数据出发，根据资源投入计算排放产出，对城市轨道交通系统温室气体排放进行定量分析。结果表明:近年来中国城市轨道交通建设和运营的温室气体排放量在2000 × 104 ~ 4200 × 104吨二氧化碳当量(tCO 2 e) /年之间;建设阶段和运营阶段的排放量分别占总排放量的57%和43%。施工阶段盾构隧道单位里程和车站单位面积的温室气体排放强度分别约为1.3 × 10.4 tCO 2 e/km和3.71 × 10.4 tCO 2 e/ha。在运营阶段，单位行程的温室气体排放强度为0.084 kg二氧化碳当量/乘客-公里。中国城市轨道交通系统全生命周期每公里温室气体排放量为11.69 × 104 tCO 2 e(50年使用寿命)。建设阶段和运行阶段的排放量分别占总排放量的18.73%和81.27%。本研究的初步结论有助于揭示中国城市轨道交通系统的减排潜力和减排目标。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Proceedings of the Institution of Civil Engineers-Engineering Sustainability ENGINEERING, CIVIL-ENGINEERING, CIVIL

CiteScore

3.70

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： Engineering Sustainability provides a forum for sharing the latest thinking from research and practice, and increasingly is presenting the ''how to'' of engineering a resilient future. The journal features refereed papers and shorter articles relating to the pursuit and implementation of sustainability principles through engineering planning, design and application. The tensions between and integration of social, economic and environmental considerations within such schemes are of particular relevance. Methodologies for assessing sustainability, policy issues, education and corporate responsibility will also be included. The aims will be met primarily by providing papers and briefing notes (including case histories and best practice guidance) of use to decision-makers, practitioners, researchers and students.