外保温系统优化对建筑生命周期能耗的影响  

The Impact of External Insulation System Optimization on Building Life Cycle Energy Consumption

作　　者：黎瑶[1] 龚先政[1] 李昊[1] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124

出　　处：《河南大学学报（自然科学版）》2016年第2期226-231,共6页Journal of Henan University:Natural Science

基　　金：国家863计划(2013AA031602)项目;国家支撑计划(2011BAJ04B06)项目;北京市自然科学基金重点项目(2141001)

摘　　要：针对北京某高校典型学生宿舍建筑,采用生命周期分析方法和动态模拟仿真方法,研究了建筑物材料生产阶段、运行阶段和废弃阶段及全生命周期的能耗与保温系统设计参数间的关系,以确定最优保温系统参数,指导建筑节能.研究表明,黏土砖、混凝土和水泥砂浆的材料消耗量最大,占材料总消耗的98.1%;就能耗而言,混凝土的贡献最大,占36.6%;材料生产阶段的能耗占生命周期能耗的5.6%～18.8%,建筑运行阶段的能耗占生命周期能耗的80.6%～93.4%,处置阶段可以忽略不计;随着保温层厚度的增加,材料生产阶段的能耗线性增加,建筑运行阶段的能耗逐渐减小,而生命周期能耗存在最优值;当传热系数为0.3 W/m2 K、保温层厚度为130mm时,全生命周期总能耗最小.In order to determine the optimal parameters of the external insulation system and guide the building energy saving, this study chose a typical student dormitory in Beijing as research object. Life cycle assessment （LCA） and dynamic simulation method were used to research the relationship between the expandable polystyrene （EPS） external insulation system design parameters and the building energy consumption of materials production phase, operation phase, disposal phase and the whole life cycle. The results show： the consumption of clay brick, concrete and cement mortar account for 98.1~ of the total materials consumption, where concrete contributes most to energy consumption （36.6%）. Regarding the contribution to building life cycle energy consumption, materials production phase accounts for 5.6% ～ 18.8 %, building operation phase takes up 80.6%～ 93.4 %, and the disposal phase can be neglected. With the increase of EPS insulation thickness, energy consumption increases linearly in the material production phase, decreases in building operation phase, and has an optimization value in the building life cycle, which will reach the minimum when the heat transfer coefficient （K） is 0.3 W/m2K and the EPS insulation thickness is 130 mm.

关 键 词：建筑 生命周期评价(LCA) EPS系统 能耗 

分 类 号：TU551.2[建筑科学—建筑技术科学] TU111.195