陕南居住建筑墙体材料热工性能及其应用研究

发布时间：2018-12-06 14:51

【摘要】：面对目前全球能源日益紧张、人居环境日益恶化的现状，全世界都在开展节约能源的相关研究工作。相关研究表明，实现建筑节能的有效技术措施之一是围护结构的保温隔热性能，而墙体材料的的热工性能又与围护结构的保温隔热息息相关。陕南地区页岩资源丰富，当地墙体材料就地取材，以烧结页岩多孔砖和空心砖为主，但是当地页岩砖的热工性能及其应用没有相关研究资料，其保温隔热性能还有没有可以改善的空间，目前的围护结构构造是否满足相关要求，针对以上问题，本文作以下研究：首先利用Ansys软件的fluent模块，结合空气间层传热特点，研究孔洞长宽比、孔排数和列数、排列方式等因素与页岩砖导热系数的关系，研究结果表明：增加矩型孔洞孔长宽比会提高多孔砖的保温效果；提高孔洞率、增加孔的排列数及孔肋延长线系数，多孔砖的导热系数都有不同程度的提高。市场上240mm115mm 90mm多孔砖模拟分析当量导热系数为0.46W/(m·K)，优化设计后的多孔砖模拟分析的当量导热系数为0.43W/(m·K)，与市场多孔砖相比，，降低约6％。实验表明，对页岩空心砖孔壁涂低辐射材料和填充保温材料后，可降低砖体的当量导热系数。前者当量导热系数为0.50W/(m·K)，降低13.7%；后者当量导热系数为0.425W/(m·K)，降低26.7%。论文选取陕南地区典型居住建筑为研究对象，结合实验结果，依据陕南地区气候特征，建立模拟计算模型，然后运用DeST-h软件模拟计算相同外墙构造下，不同外墙传热系数对建筑负荷的影响，提出外墙构造优化方案。通过软件模拟和实验等方法，本文对陕南地区居住建筑墙体材料热工性能及其应用有了较为深入的认识，并探索提高其保温隔热性能，论文的研究对页岩砖的推广及建筑节能具有一定的理论价值和现实意义。
[Abstract]:In the face of the global energy shortage and the worsening of the living environment, the research on energy conservation is being carried out all over the world. Related studies show that one of the effective technical measures for building energy saving is the thermal insulation performance of the envelope structure, and the thermal properties of the wall materials are closely related to the thermal insulation of the envelope structure. The area of southern Shaanxi is rich in shale resources, and the local wall materials are based on local materials, mainly sintered shale porous brick and hollow brick. However, there is no relevant research data on the thermal properties and application of local shale brick. In view of the above problems, this paper makes the following research: firstly, using the fluent module of Ansys software, there is no room for improvement of its thermal insulation performance, and whether the current structure of the enclosure structure meets the relevant requirements. Based on the heat transfer characteristics of the air interlayer, the relationship between the length to width ratio, the number of holes, the number of holes and the arrangement mode and the thermal conductivity of shale brick is studied. The results show that increasing the ratio of length to width of rectangular hole can improve the thermal insulation effect of porous brick. The thermal conductivity of porous brick can be improved in different degree by increasing the porosity, increasing the number of holes arranged and the coefficient of the lengthening line of the hole rib. The equivalent thermal conductivity of 240mm115mm 90mm porous brick is that of 0.46W/ (m K), optimized design. The equivalent thermal conductivity of the simulation analysis of porous brick with 0.46W/ (m K), is about 6% lower than that of porous brick in market. The experimental results show that the equivalent thermal conductivity of the shale hollow brick can be reduced by coating the hole wall with low radiation material and filling the insulating material. In the former, the equivalent thermal conductivity was reduced by 13.7% for 0.50W/ (m K), while the equivalent coefficient of thermal conductivity in the latter was reduced by 26.7g for 0.425W/ (m K),. In this paper, the typical residential buildings in southern Shaanxi are selected as the research objects, and according to the climate characteristics of the southern Shaanxi region, the simulation calculation model is established, and then the DeST-h software is used to simulate and calculate the same exterior wall structure. The influence of different external wall heat transfer coefficient on building load is put forward. By means of software simulation and experiment, this paper has a deeper understanding of the thermal properties and its application of wall materials for residential buildings in southern Shaanxi, and explores how to improve its thermal insulation performance. The research of this paper has certain theoretical value and practical significance for the promotion of shale brick and building energy conservation.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU502;TU111

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