摘要
以我国多个典型的住宅建筑和商业建筑为研究对象,基于生命周期评价理论,依托于建筑环境负荷评价体系(BELES)的数据库和分析模型,对各个样本的建材焓能和CO_2排放进行了详细计算和分析,并对建筑运行阶段和建造拆除阶段的能耗和CO_2排放进行了研究。结果表明,主要建材中焓能排前三的依次是钢材、水泥和铝材,CO_2排放量最大的依次是水泥、钢材和铝材。建筑的全生命周期能耗中运行能耗所占比例最大,建材焓能次之。住宅建筑和商业建筑由于运行阶段的用能情况差异而在其全生命周期中呈现出不同的能耗和CO_2排放特点。
According to the Life Cycle Assessment(LCA) theory,the building materials' embodied energy and carbon dioxide emission of several typical residential buildings and commercial buildings in Beijing were calculated and analyzed in detail in this study based on the database of energy and building materials,energy consumption and carbon dioxide analysis models of Building Environment Load Evaluation System(BELES).And the energy consumption and carbon dioxide emissions in other stages of a building such as construction,operation and demolition were also analyzed in this study based on investigation and former research related.The results of this study show that in the main building materials the embodied energy of steel is the most,cement comes the next,followed by aluminum,and the carbon dioxide emission of cement is the most,followed by steel and aluminum.Operation energy consumption is the largest part of a building's total life cycle energy consumption,followed by embodied energy of building materials.And by comparing the life cycle energy consumption of residential buildings and commercial buildings,it shows that the characteristics of energy consumption and carbon dioxide emission of residential and commercial buildings are different due to the difference of energy use between them in the operation stage.
