建筑围护结构节能设计火用分析及CO_2排放研究  

Research on the Exergy and CO_2 Emissions of the Energy-saving Design of Building Envelope

作　　者：龚光彩[1] 蔡立群[1] 王平[1] 王莹[1] 黎龙[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2015年第1期109-114,共6页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51378186);国家国际科技合作资助项目(2010DFB63830);湖南省住房和城乡建设厅科技计划资助项目(KY201111)~~

摘　　要：以夏热冬冷地区株洲市某办公楼为研究对象,基于全生命周期理论与火用方法,对建筑围护结构不同节能设计方案能耗、火用耗及CO2排放量进行分析,并结合热经济学原理,建立了围护结构火用成本分析模型来综合评价节能设计方案的经济性及节能性.结果表明:当节能设计后建筑运行阶段节约的能耗或CO2减排量大于因节能而投入的能耗及CO2排放量时,才能达到真正意义上的节能.文中方案1,方案2中建筑运行阶段节约的能耗分别需要10年,11年才能抵消建材生产阶段产生的能耗,CO2减排量分别需要4,5年才能抵消建材生产阶段产生CO2排放量.且建材生产阶段的火用耗远远大于节能设计后运行阶段节火用量,火用成本的分析结果表明较低的单位火用成本,意味着选用投资较少的节能改造方案,较多的使用低品位能源,得到了火用效率较高的制冷量、制热量,建筑整体节能性和可持续性高.To achieve the comprehensive assessment goal of economy and energy conservation in energy-saving design scheme selection,based on the life cycle theory,exergy analysis method and thermo-economics,the exergy consumption and CO2 emissions of different energy-saving design schemes and exergy cost models were evaluated and built.The analysis of the two energy conservation schemes of an office building in Zhuzhou indicates that,to reach the true sense of energy conservation,energy saving and CO2 emission cuts in building operation stage should be greater than the consumption in building production stage.The energy consumption and CO2 emission in the building produc-tion stage of Scheme one and Scheme two will need 10,11 years and 4,5 years respectively to be offset.And the exer-gy consumption in the production stage is far more than the exergy saving in the operation stage.The analysis result of exergy cost reveals lower exergy cost means less investment,more low-grade energy usage and higher exergy effi-ciency.It shows the energy saving property and sustainability of buildings.

关 键 词：建筑围护结构 热经济学 火用 节能设计 

分 类 号：TU111[建筑科学—建筑理论] TK123[动力工程及工程热物理—工程热物理]