建筑隐含碳排放的大数据特征

Big Data Characteristics of Embodied Carbon Emissions of Buildings

建筑全生命周期中隐含碳贯穿于碳排放的多个阶段,现阶段全社会对隐含碳的减排还未给予足够的重视。本研究基于规模房地产企业的近140个总建筑面积超1670万m的在建项目碳排放核算及统计分析,总结出建筑隐含碳排放具有四个特征:建材生产碳排放占比最高;项目所在纬度越高其碳排放强度越高;混凝土和钢筋及金属材料是重点关注和降低隐含碳的关键;装配式建筑的施工过程碳排放强度小于非装配式建筑项目。并针对以上特征,进一步提出推进建材产品碳足迹披露、优化供应链管理、推广装配式建筑以及建筑与建材协同降碳的建议,这些措施有助于实现建筑行业的可持续发展。

Embodied carbon runs through multiple stages of carbon emissions throughout the entire lifecycle of buildings,but the reduction of embodied carbon emissions has not yet received sufficient attention.This study is based on the carbon emission accounting and statistical analysis of nearly 140 under construction projects with a total construction area of over 16.7 million square meters in large-scale real estate enterprises.It summarizes four characteristics of embodied carbon emissions in buildings;the highest proportion of carbon emissions in building's whole life is from material production;the higher the latitude of the project,the higher the carbon emission intensity;concrete,rebar and metal materials are the key to focusing on and reducing embodied carbon:the carbon emission intensity during the construction process of prefabricated buildings is lower than that of non prefabricated building projects.Furthermore,based on the above characteristics,suggestions are proposed to promote carbon footprint disclosure of building materials products,optimize supply chain management.promote prefabricated buildings,and coordinate carbon reduction between construction and building materials.These measures will help achieve sustainable development of the construction industry.