玻化微珠保温砂浆局部外保温系统热桥有限元分析

发布时间：2018-04-03 03:10

本文选题：ANSYS有限元分析　切入点：玻化微珠保温砂浆　出处：《新型建筑材料》2016年12期

【摘要】：基于ANSYS有限元分析和温度场理论,针对外墙中柱和外墙角柱热桥部位进行数值模拟分析,通过改变热桥局部玻化微珠保温砂浆层厚度,分析研究不同保温层厚度条件下的温度场和热流密度分布。结果表明:局部玻化微珠保温层厚度对热桥部位的温度和热流密度影响比较明显。为了避免结露现象,外墙中柱的局部保温层厚度应大于20 mm,外墙角柱的局部保温层厚度应大于40mm。采取局部保温处理时,外墙中柱的热桥影响区域为200 mm,外墙角柱的热桥影响区域为150 mm,热桥影响区域内损失的热量较多,所以应重视热桥影响区域的散热问题。相同条件下,外墙中柱比外墙角柱的热桥影响区域大,散热多,更应该加强保温处理。
[Abstract]:Based on the ANSYS finite element analysis and the theory of temperature field, numerical simulation analysis was carried out on the thermal bridge part of the middle column and the corner column of the external wall, and the thickness of the thermal insulation mortar layer was changed by changing the local vitrified microbead insulation mortar layer of the thermal bridge.The distribution of temperature field and heat flux under different thickness of insulation layer is analyzed and studied.The results show that the thickness of the local vitrified microbead insulation layer has an obvious effect on the temperature and heat flux of the thermal bridge.In order to avoid the phenomenon of condensation, the thickness of the local insulation layer should be more than 20 mm in the middle column of the external wall, and the thickness of the local insulation layer in the corner column of the external wall should be more than 40 mm.When local heat preservation is taken, the heat bridge influence area is 200 mm in the middle column of the external wall and 150 mm in the corner column of the external wall. The heat loss in the area affected by the thermal bridge is much, so the heat dissipation problem of the area affected by the thermal bridge should be paid attention to.Under the same conditions, the heat bridge of the external wall is larger than the corner column of the external wall, and the heat dissipation is much, so it is necessary to strengthen the heat preservation treatment.
【作者单位】：山西建筑职业技术学院;
【基金】：国家自然科学基金项目(51308371)
【分类号】：TU578.1

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