建筑外保温结构透湿性能及防火性能研究

发布时间：2018-03-18 15:13

本文选题：新外保温结构　切入点：透湿性能　出处：《南京航空航天大学》2013年硕士论文　论文类型：学位论文

【摘要】：本文从外墙外保温系统构造出发，综述国内外现有的各种外墙外保温结构体系，总结国内外针对外墙外保温结构的热湿传递所使用的研究方法。通过数值模拟比较分析热湿气候条件下典型外墙外保温结构的瞬态热流密度、传热系数及平均湿含量，在此基础上提出新型外保温系统结构并对其进行保温性能和透湿性能的研究，并分析不同基层墙体材料和防水材料对新墙体结构传热系数的影响，该结果对建筑外墙外保温系统中材料的选择具有重要的参考价值。利用有限容积法求解一维非稳态热湿耦合方程，运用Matlab进行程序编制，，结合南京实际气象参数，求解典型的冬冷夏热气候条件下墙体温度场、湿度场以及传热系数，并将数值计算结果与软件模拟结果进行对比。针对新外保温系统进行了结构耐候性实验和传热系数测试，实验结果表明外保温系统结构满足耐候性要求，也表明外保温系统构造与材料的选择比较合理。数值模拟与小型防火实验相结合验证了增设防火隔离带能有效延缓火焰蔓延并减少室内二氧化碳的产生。
[Abstract]:Starting from the construction of exterior wall thermal insulation system, this paper summarizes all kinds of existing exterior wall thermal insulation structures at home and abroad. This paper summarizes the research methods used at home and abroad for heat and humidity transfer of exterior wall thermal insulation structure. The transient heat flux, heat transfer coefficient and average moisture content of typical external wall thermal insulation structures under the condition of thermal and humid climate are compared and analyzed by numerical simulation. On this basis, a new type of external insulation system structure is proposed, and the thermal insulation and moisture permeability of the new wall structure are studied, and the influence of different base course wall materials and waterproof materials on the heat transfer coefficient of the new wall structure is analyzed. The results have important reference value for the selection of materials in the external insulation system of building exterior wall. The finite volume method is used to solve the one-dimensional unsteady-state thermal-moisture coupling equation, and the Matlab program is used to program the wall temperature field, humidity field and heat transfer coefficient under typical winter, cold and summer hot weather conditions combined with the actual meteorological parameters in Nanjing. The results of numerical calculation and software simulation are compared. The structure weather resistance and heat transfer coefficient of the new external insulation system are tested. The experimental results show that the structure of the external thermal insulation system meets the requirements of weather resistance. It also shows that the structure and material selection of the external thermal insulation system is reasonable. The numerical simulation and the small fire prevention experiments show that the addition of the anti-fire isolation belt can effectively delay the flame spread and reduce the indoor carbon dioxide generation.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU761.12

【参考文献】