狭义物化能概念下建材CO_2的排放量分析  

Analysis of CO_2 emission from the building materials in view of the embodied energyconsumption

作　　者：张培[1] 朱涵[1,2] 刘春生[3] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]滨海土木工程结构与安全教育部重点实验室(天津大学),天津300072 [3]天津新金融投资有限责任公司,天津300451

出　　处：《安全与环境学报》2013年第2期76-78,共3页Journal of Safety and Environment

基　　金：国家自然科学基金项目(51078261)

摘　　要：在建筑能耗中共有4种温室气体排放,其中CO2排放量占能耗温室气体的99%以上。从狭义物化能角度对建筑材料的CO2排放量进行了阶段划分,包括原料开采与生产、成品加工、材料运输、施工、回收,并在每个阶段建立了计算模型,尤其是定义了回收阶段的求解公式,重点强调了回收对建筑周期CO2排放量的重要影响以及纳入分析周期的必要性。选取钢材作为研究对象,分析在钢筋混凝土高层建筑中,考虑回收作用时钢筋在狭义物化概念下的CO2排放量。纳入回收因素后的结果表明,剪力墙是CO2排放量最大的结构形式,商厦是排放量最大的功能性建筑,并且回收作为唯一降低CO2排放量的阶段,其计算量占整体排放量的比例很大,验证了回收的重要性。因此,考虑回收作用的生命周期物化能评价体系才是完整科学的评价体系。This paper intends to present the results of analysis of CO2 emission from the building materials from the point of view of the special embodied energy consumption. As is known, there are four kinds of greenhouse gases with the construction energy consumption, of which CO2 emission accounts for over 99%. We would like to divide the analysis of the CO2 emission of such materials into different stages for an architecture life cycle with the regard of its special embodied energy consumption, including the natural inspiration and expiration of the raw material, the processing of the material products, their transportation, the project construction, the recycling of the CO2 emissions of the materials （particularly materials that can be recycled, for instance the steel） and so on. It is just for testing such energy consumption cases that we have built testing models for each stage, in particular to define the recovery stage of the solution to work out the CO2 emission. From the accounting model we know that the recycling account and comparison of different stages. Therefore, it is necessary to emphasise the meaningful influence of the recycling building materials on the CO2 emission for the life cycle of the materials under study. It is also necessary to emphasize the importance of recycling while considering the whole life cycle of the building. And, finally, we want to choose steel as the research objective in this paper for its multiple use in building industry. On the basis of the computational model, we have analysed the CO2 emission of steel in the reinforced concrete for high-rises in different stages from the view of special chemical energy consumption. The calculation results with the recycling show that the inspiration of the raw materials and its expiration is the greatest stage of the CO2 emissions whereas the shear wall structure is the most significant form of the CO2 emission in comparison with other kinds of structures. Of all kinds of architectures, commercial buildings emit greatest amount of CO2,

关 键 词：建筑材料 狭义物化能耗 CO2排放量 钢材 回收利用 

分 类 号：TU51[建筑科学—建筑技术科学]