摘要
城市轨道交通在促进城市交通绿色低碳发展、大幅提升出行便利度的同时也产生了一定的碳排放。如何合理量化城市轨道交通碳排放水平并测度其减排潜力是实现交通部门碳达峰、碳中和的首要问题。本文基于生命周期评价理论构建了地铁全生命周期碳排放评价方法,对地铁的碳排放强度与碳减排水平进行了定量化分析,并进一步探讨了地铁的低碳、近零碳排放路径与策略。研究结果表明:近年来全国地铁建设和运营阶段碳排放总量为2500万~3500万t CO_(2)e,地铁隧道单位里程碳排放约为1.3万t CO_(2)e/km,单位面积地下车站碳排放约为371 t CO_(2)e/100 m^(2),地铁出行碳排放0.7 kg CO_(2)e/人次。以2020年为例,全国地铁运营碳减排当量约为730万t CO_(2)e,预计到2025年将达到1240万t CO_(2)e,过去20年居民选择地铁出行方式累计减碳量约占全国能源领域化石燃料碳排放总量的1%。2020年因地铁建设释放地上土地资源形成的城市绿地碳汇量约为30万t CO_(2)e,预计到2025年将达到44.8万t CO_(2)e。研究结果可为交通领域科学实现绿色低碳转型及制定地铁系统节能管理政策提供理论支撑及数据参考。
Urban rail transit not only promotes the green and low-carbon development of urban transportation and greatly improves travel convenience,but also produces certain carbon emissions.How to quantify the carbon emission level of urban rail transit and measure its emission reduction potential is the primary problem to achieve carbon peak and carbon neutralization in the transportation sector.Based on the life cycle assessment(LCA)theory,this paper constructs the subway life cycle carbon emission assessment method,makes a quantitative analysis on the subway carbon emission intensity and carbon emission reduction level,and further discusses the subway low-carbon and near zero carbon emission path and strategy.The research results show that:in recent years,the total carbon emission of subway construction and operation in China is 25-35 Mt CO_(2)e,the carbon emission per unit mileage of subway tunnel is about 13,000 t CO_(2)e/km,the carbon emission per unit area of station is about 3.7 t CO_(2)e.The per capita carbon emission of subway operation is 0.7 kgCO_(2)e.Taking 2020 as an example,the carbon emission reduction equivalent of the national subway operation is about 7.3 Mt CO_(2)e,and it is expected to reach 12.4 million t CO_(2)e by 2025.In the past 20 years,the cumulative carbon reduction of residents’choice of subway travel mode accounts for about 1%of the total carbon emission from fossil fuels in the national energy sector.In 2020,the urban green space carbon sink formed by the release of above-ground land resources due to subway construction is about 0.3 Mt CO_(2)e,and it is expected to reach 0.45 Mt CO_(2)e by 2025.The research results can provide theoretical support and data reference for the scientific realization of green and low-carbon transformation in the field of transportation and the formulation of energy-saving management policies of urban rail transit system.
作者
陈坤阳
周鼎
粟月欢
段华波
陈湘生
CHEN Kunyang;ZHOU Ding;SU Yuehuan;DUAN Huabo;CHEN Xiangsheng(College of Civil and Transportation Engineering,Underground Polis Academy,Shenzhen University,Shenzhen 518061,China;Key Laboratory for Resilient Infrastructures of Coastal Cities(Shenzhen University),Ministry of Education,Shenzhen University,Shenzhen 518060,P.R.China;Shenzhen Key Laboratory of Green,Efficient,and Intelligent Construction of Underground Metro Station,Shenzhen 518060,China;China Fortune Land Development Co.,Ltd.-South China Operations,Shenzhen 518066,China)
出处
《铁道标准设计》
北大核心
2022年第5期1-7,共7页
Railway Standard Design
基金
中国工程院、国家自然科学基金委联合重点项目(L1924061)
中国工程院咨询重大研究项目:地下空间开发综合治理体系战略研究(2019-ZD-28)。
关键词
城市轨道交通
地铁
生命周期评价
碳排放
碳减排
碳汇
urban rail transit
subway
life cycle assessment
carbon emission
carbon emission reduction
carbon sequestration
