"十四五"期间"双碳"目标的提出,推动着我国基础设施建设向绿色低碳的方向发展,生命周期评价方法(LCA)作为一款全面的环境影响评价工具逐渐开始应用到我国建筑业.以生命周期评价理论为基础,选取长江上游某内河港口工程为研究对象,将该港口工程全生命周期划分为施工阶段、运维阶段及退役阶段进行碳排放来源分析并估算碳排放.结果表明,该港口工程全生命周期碳排放为 8.67 万t CO2-eq(当量),施工阶段、运维阶段、退役阶段分别占比 39.4%、56.7%、3.9%,单位碳排放为 95%置信区间为 651.92～745.21 kg CO2-eq/m2,中位数为 698.14 kg CO2-eq/m2,清单数据不确定性较小,港口工程碳排放敏感因素为混凝土和电力.碳排放评价结果总体较好,可作为后续制定碳减排政策的相关依据.
Estimation and analysis of carbon emissions from inland river port project in upper Yangtze River based on LCA
With the introduction of the"carbon peak and neutrality"in the 14th Five-Year Plan,China's infrastructure construction is driven towards a green and low-carbon direction,and the life cycle assessment(LCA)method is gradually being applied to China's construction industry as a comprehensive environmental impact assessment tool.Based on the life cycle assessment theory,we select an inland river port project in the upper reaches of the Yangtze River as the research object,and divide the whole life cycle of the port project into the construction phase,operation and maintenance phase and decommissioning phase to analyze the carbon emission sources and estimate the carbon emission.The results show that the life-cycle carbon emissions of the port project are 86,700 t CO2-eq,with 39.4%,56.7%and 3.9%for the construction,operation and maintenance and decommissioning phases respectively.The 95%confidence interval for unit carbon emissions is 651.92 to 745.21 kg CO2-eq/m2,with a median value of 698.14 kg CO2-eq/m2.The uncertainty in the inventory data is little,and the sensitive factors for port carbon emissions are concrete and electricity.The carbon emission evaluation results are generally good,and can be used as a relevant basis for the subsequent formulation of carbon emission reduction policies.
life cycle assessmentinland waterway port engineeringcarbon emissionuncertainty analysis
万方数据
维普
