空气间层对“一体化”外墙保温系统性能影响的研究

发布时间：2018-05-11 00:19

本文选题：建筑节能 + 空气间层　；参考：《安徽建筑大学》2014年硕士论文

【摘要】：节能减排是减轻环境污染、解决能源危机的重要途径，建筑能耗占社会总能耗30%左右。随着我国城镇化水平的不断提高，产业结构的调整，建筑能耗的比例将继续提高。要实现节能65%的目标，则必须提高围护结构保温隔热性能。目前我国的外墙保温隔热技术相比国外还存在一定的差距，因此有必要参照国外发展经验，做好外墙保温系统的热桥阻断、空气隔断等工作，这对于国内建筑节能事业的发展具有非常积极的意义。本文以一体化外墙保温系统为研究对象，通过理论计算、CFD模拟、DeST建筑能耗分析以及实测数据等方法，分析空气间层定型尺寸对一体化外墙保温系统保温隔热性能的影响。首先本文阐述了我国常用的外墙保温系统安装方法及特点，安装过程中主要节点的处理方法，列举了湿式与干式安装方法的优点和不足，并指出空气间层的引入可以提高干式安装方法的保温性能。第三章首先介绍了一体化外墙保温系统典型构造，根据传热学傅立叶定律和格拉晓夫准则等基本原理对该系统进行传热理论分析；并将该系统简化成物理模型，根据合肥地区气候条件确定边界条件，将上述问题简化为二维稳态传热温度，进行CFD模拟。研究空气间层定型尺寸对该系统传热性能的影响，确定工程应用的最优安装尺寸。第四章根据上面最优定型尺寸的计算，应用在示范工程百乐门尚泽国际写字楼项目中，使用DeST建筑能耗分析软件对示范工程全年8760h室内温度进行模拟，对模拟结果进行数据分析，，根据前人在室内舒适度方面的研究，确定冬季供暖和夏季空调开启时间，对夏热冬冷地区建筑节能提出建议。文章最后统计分析了实验房采集的温度和热流密度数据，分析了近两年实时测量的温度分布情况，结合热流密度采集的数据，计算出冬季12月、1月和夏季7月、8月的热阻，得出夏热冬冷地区建筑节能应综合考虑保温与隔热两种工况，选择最优值，不能一味的追求围护结构传热系数的降低。
[Abstract]:Energy saving and emission reduction is an important way to reduce environmental pollution and solve the energy crisis. Building energy consumption accounts for about 30% of the total energy consumption. With the development of urbanization and the adjustment of industrial structure, the proportion of building energy consumption will continue to increase. To achieve the goal of energy saving of 65%, it is necessary to improve the insulation performance of the enclosure. At present, there is still a certain gap between the external wall insulation and heat insulation technology in our country, so it is necessary to do a good job of blocking the thermal bridge and air partition of the external wall insulation system with reference to the foreign development experience. This is of great significance to the development of building energy conservation in China. This paper takes the integrated exterior wall insulation system as the research object, and analyzes the influence of the air interlayer shape size on the thermal insulation performance of the integrated external wall insulation system by means of theoretical calculation of CFD simulation of energy consumption analysis and measured data. First of all, this paper describes the installation methods and characteristics of the external wall insulation system commonly used in our country, the treatment methods of the main nodes in the installation process, and enumerates the advantages and disadvantages of the wet and dry installation methods. It is pointed out that the introduction of air interlayer can improve the thermal insulation performance of dry installation method. In the third chapter, the typical structure of the integrated exterior wall insulation system is introduced, and the heat transfer theory of the system is analyzed according to the Fourier law of heat transfer and the Graschev criterion, and the system is simplified into a physical model. According to the climatic conditions in Hefei area, the boundary conditions are determined, and the above problems are simplified to two-dimensional steady-state heat transfer temperature. The CFD simulation is carried out. The effect of air interlayer setting size on the heat transfer performance of the system is studied and the optimal installation size for engineering application is determined. In chapter 4, according to the calculation of the optimum size above, the indoor temperature of 8760h is simulated by using DeST building energy analysis software in the project of Paramount Shangze International Office Building, which is a demonstration project. According to the previous research on indoor comfort, the time of heating and air conditioning in summer is determined, and suggestions for building energy saving in hot summer and cold winter area are put forward. Finally, the temperature and heat flux data collected in the laboratory are statistically analyzed, and the temperature distribution measured in real time in the last two years is analyzed. The thermal resistance in December, January and summer July and August in winter is calculated by combining the data collected by heat flux collection. It is concluded that building energy conservation in hot summer and cold winter area should consider heat preservation and heat insulation comprehensively and select the optimum value, so that the decrease of heat transfer coefficient of enclosure structure should not be pursued blindly.
【学位授予单位】：安徽建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU761.12

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