夏热冬冷地区自保温体系典型热桥传热模拟分析及优化

发布时间：2018-08-27 15:07

【摘要】：在夏热冬冷地区的建筑墙体围护结构中,采用自保温体系可避免外保温体系、内保温体系的不足和缺陷。然而在推广自保温体系时也碰到很多新的问题。其中,如何采用合适的构造来解决热桥的保温问题是亟待解决的重要问题之一。本文提出了评价热桥传热情况的4个指标：热桥等效传热系数、热桥影响范围、边流影响系数、热桥处温度波动,以此研究了不同自保温体系(页岩多孔砖、加气混凝土砌块、夹心保温砌块)下,不同构造时的热桥保温性能,通过对比分析总结出梁、楼板热桥内退墙面距离、挑耳处保温层厚度、保温层覆盖范围、自保温体系材料是影响热桥保温的4个关键因素。最后在此因素基础上得出,在特定的自保温墙体材料下,在各自的热桥构造中,梁、楼板热桥内退墙面的合适距离为120mm,挑耳处保温层的合适厚度为l0mm,保温层覆盖的合适范围为800mm。本文提出的方法可比现有热桥评价方法更为准确、全面的评价热桥传热情况,可为构造的选取提供参考依据,可为构造的优化结果提出评价标准。
[Abstract]:In the construction wall enclosure structure in hot summer and cold winter area, the deficiency and defect of external insulation system and internal insulation system can be avoided by adopting self-insulation system. However, in the promotion of self-insulation system also encountered many new problems. Among them, how to adopt the suitable structure to solve the heat insulation problem of the thermal bridge is one of the important problems to be solved urgently. In this paper, four indexes for evaluating heat transfer of hot bridges are put forward: equivalent heat transfer coefficient of thermal bridges, influence range of thermal bridges, influence coefficient of side flow, and temperature fluctuation of thermal bridges. Different self-insulating systems (shale porous brick, aerated concrete block) are studied in this paper. Under the sandwich insulation block), the thermal insulation performance of the thermal bridge under different structures is summed up by comparison and analysis, such as the distance between beams, floor heat bridges, the thickness of the insulation layer at the ear, the coverage of the insulation layer, the distance between the walls of the beam, the floor heat bridge, the thickness of the insulation layer at the ear, The material of self-insulation system is the four key factors affecting heat bridge insulation. Finally, on the basis of these factors, it is concluded that under the specific self-insulating wall materials, the appropriate distance between the beam and the floor is 120 mm, the appropriate thickness of the insulation layer at the ear is 10 mm, and the suitable range of the insulation layer is 800 mm in the respective thermal bridge construction. The method proposed in this paper is more accurate than the existing thermal bridge evaluation method. The comprehensive evaluation of heat transfer of the thermal bridge can provide a reference for the selection of the structure and the evaluation criteria for the optimization results of the structure.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU111.4

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