自保温空心砖传热性能研究.doc

自保温空心砖传热性能研究 摘 要： 在当前的能源和建筑节能形式下，自保温空心砖作为一种新型的建筑材料与传统砖相比，具有良好的保温隔热性能。加上其具有使用的寿命和建筑物的寿命相一致、施工相对简单、容易确保施工的质量并且方便外墙饰面、价格低廉等优点，在建筑工程中得到了广泛应用。由于其具有良好的保温隔热性能，可作为墙体节能材料，因而受到了很多节能研究人员的关注。目前，对自保温空心砖的隔热保温性能的研究主要是采取模拟试验的方法。本文主要应用Gambit和Fluent软件模拟试验，比较几种不同类型的空心砖的保温性能，初步确定影响自保温性能的因素，为改进空心砖的自保温能力提供了参考依据。 关键词： 自保温空心砖；保温隔热性能；模拟试验；Gambit和Fluent Abstract In the current situation of energy and building energy conservation, compared with traditional bricks, the Self-insulation Hollow brick as a new building material has excellent heat insulation performance besides it has some advantages such as service life consisting with the life of building, relatively simple construction, easy to ensure construction quality and easy to exterior wall finishes, low price. Therefore, the Self-insulation Hollow brick is widely used in construction engineering. As a result of its excellent heat insulation performance, the Self-insulation Hollow brick is focused much attention by researchers in energy conservation. At present, the simulation test is mainly adopted in the study of the heat insulation performance of the Self - insulation Hollow brick. In this paper, the software of gambit and fluent are applied to simulate experiments about the heat insulation performance of different kinds of hollow bricks and thus the factors influencing heat insulation performance of the new brick are confirmed, which offers references to improve the heat insulation performance of hollow bricks. Key words：the self-insulation hollow brick; heat insulation performance; simulation test; the software of Gambit and Fluent 1 引 言 1.1 空心砖自保温的研究意义 在我国城市化迅速发展的大趋势下，建筑的建造规模越来越大，建筑能耗在能源的总消耗量中所占比例也逐年的上升。然而这些建筑能耗中包含巨大的能量损失，仅建筑围护结构的热损失就将近总损失的77%，其中墙体又在围护结构中占的比例最大，大约59.4%的热量都是通过墙体散发出去的。由此可见降低建筑能耗的关键措施之一是降低墙体的散热损失，即提高墙体的保温隔热能力。目前，墙体保温技术主要有外墙内保温技术、外保温技术和墙体的自保温技术（即空心砖的自保温技术）。 外墙内保温技术应用相对较少，因为它存在以下问题： 内保温复合墙体 保温隔热能力较差，外墙的平均传热系数偏高 根据相关研究，采用内保温技术，其主体结构的传热系数比平均传热系数要高出1.8～2.0。 不利于室内装修 二次装修时破坏内