加气混凝土隔热屋面热工性能的实验研究

发布时间：2019-03-20 21:35

【摘要】：广州属南亚热带季风气候区，广州地处低纬,地表接受太阳辐射量较多，同时受季风的影响,夏季海洋暖气流形成高温、高湿、多雨的气候，因此，利用被动蒸发降温技术有着气候优势。加气混凝土作为一种新型节能材料进入建筑材料市场，具有保温隔热、质轻、耐火阻燃、吸音隔声以及易于加工的特点，，而且加气混凝土还是一种应用较多的多孔蓄水材料，既可以作为保温隔热屋面的保温层，也可以作为蒸发隔热屋面的被动蒸发层；都属于加气混凝土隔热屋面。加气混凝土隔热屋面中的加气混凝土层究竟是作为保温层隔热效果更好，还是作为被动蒸发层隔热效果更好，前人的研究并没有给出明确的结论，本实验选取广州地区一年中气温最高的七，八月份中一个月，在实际建筑屋顶建造实验屋面，对比分析加气混凝土层的位置对加气混凝土隔热屋面隔热性能的影响，并分析加气混凝土层的厚度对加气混凝土隔热屋面热工性能的影响，寻求加气混凝土隔热屋面的最优厚度。本文的主要工作有： 1.建造加气混凝土层厚度分别为50mm、100mm、150mm的加气混凝土保温隔热屋面和加气混凝土蒸发隔热屋面。测试实验屋面内外表面温度、热流密度； 2.对加气混凝土层厚度相同的加气混凝土保温隔热屋面和蒸发隔热屋面的隔热效果进行对比分析，研究加气混凝土层的位置对加气混凝土隔热屋面热工性能的影响； 3.对加气混凝土层厚度不同的加气混凝土层保温隔热屋面的隔热效果进行对比分析，研究加气混凝土层厚度对加气混凝土保温隔热屋面热工性能的影响； 4.对加气混凝土层厚度不同的加气混凝土蒸发隔热屋面的隔热效果进行对比分析，研究加气混凝土层厚度对加气混凝土蒸发隔热屋面热工性能的影响。
[Abstract]:Guangzhou is a sub-tropical monsoon climate region. Guangzhou is located at low latitudes and receives more solar radiation on the surface. At the same time, due to the influence of monsoon, the warm currents of the ocean in summer form a climate of high temperature, high humidity, and heavy rain, so, The use of passive evaporation and cooling technology has climate advantages. As a new energy-saving material, aerated concrete has the characteristics of heat preservation, heat insulation, light weight, fire retardant, sound absorption and sound insulation and easy to process, and aerated concrete is a kind of porous water storage material which is used in many fields. It can be used not only as insulation layer of thermal insulation roof, but also as passive evaporation layer of evaporative insulation roof. All belong to aerated concrete insulated roof. Whether the aerated concrete layer in aerated concrete insulation roof is better as insulation layer or as passive evaporation layer, the previous research has not come to a clear conclusion. In this experiment, the experimental roof was built in the actual building roof in July and August, the highest temperature in one year in Guangzhou area, and the influence of the position of aerated concrete soil layer on the thermal insulation performance of aerated concrete insulation roof was compared and analyzed. The influence of the thickness of aerated concrete layer on the thermal performance of aerated concrete insulated roof is analyzed, and the optimum thickness of aerated concrete insulated roof is sought. The main work of this paper is as follows: 1. The thickness of aerated concrete layer is 50mm 100mm 150mm aerated concrete insulation roof and aerated concrete evaporative insulation roof. The temperature and heat flux of the external and inner surfaces of the roof were measured. The thermal insulation effect of aerated concrete insulation roof and evaporative insulation roof with the same thickness of aerated concrete is compared and analyzed, and the influence of the position of aerated concrete layer on the thermal performance of aerated concrete insulated roof is studied. The influence of aerated concrete layer thickness on thermal performance of aerated concrete thermal insulation roof is studied by comparing and analyzing the thermal insulation effect of aerated concrete insulation roof with different thickness of aerated concrete layer; 4. the influence of the thickness of aerated concrete layer on the thermal performance of aerated concrete thermal insulation roof is studied. The thermal insulation effect of aerated concrete evaporative insulation roof with different thickness of aerated concrete is compared and analyzed, and the influence of the thickness of aerated concrete layer on the thermal performance of aerated concrete evaporative insulation roof is studied.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU111.2

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