Measurements of thermal properties of insulation materials by using transient plane source technique
Measurements of thermal properties of insulation materials by using transient plane source technique
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DOI：
10.1016/j.applthermaleng.2006.04.006
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发表时间：
2006-12-01
影响因子：
6.4
通讯作者：
Al-Ajlan, Saleh A.
中科院分区：
文献类型：
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作者：
Al-Ajlan, Saleh A.
本文报道了沙特阿拉伯当地制造商生产的一些常用绝缘材料的热性能测量技术和测量值。在隔热材料的热性能中，导热系数 (k) 被认为是最重要的，因为它直接影响隔热材料必须提供的热传递阻力（R 值）。其他热特性，如比热容 (c) 和密度 (p)，仅在瞬态条件下也很重要。瞬态平面源 (TPS) 技术，也称为热盘 (HD)，是测量材料热导率和扩散率的一种非常合适且准确的方法。这项新技术在本研究中用于测量一些隔热材料在室温下以及在炎热气候下的空调建筑中使用这些隔热材料时预计实际达到的不同高温水平下的导热率。另外，对不同密度的样品测量同类型保温材料的导热系数值；一般来说，建筑物屋顶使用的隔热材料密度比墙壁使用的隔热材料密度高。结果表明，在本研究考虑的温度和密度范围内，热导率随着温度的升高而增加，并随着密度的增加而降低。 (c) 2006 Elsevier Ltd. 保留所有权利。
The paper reports on the measuring technique and values of the measured thermal properties of some commonly used insulation materials produced by local manufacturers in Saudi Arabia. Among the thermal properties of insulation materials, the thermal conductivity (k) is regarded to be the most important since it affects directly the resistance to transmission of heat (R-value) that the insulation material must offer. Other thermal properties, like the specific heat capacity (c) and density (p), are also important only under transient conditions. A well-suited and accurate method for measuring the thermal conductivity and diffusivity of materials is the transient plane source (TPS) technique, which is also called the hot disk (HD). This new technique is used in the present study to measure the thermal conductivity of some insulation materials at room temperature as well as at different elevated temperature levels expected to be reached in practice when these insulations are used in air-conditioned buildings in hot climates. Besides, thermal conductivity values of the same type of insulation material are measured for samples with different densities; generally, higher density insulations are used in building roofs than in walls. The results show that the thermal conductivity increases with increasing temperature and decreases with increasing density over the temperature and density ranges considered in the present investigation. (c) 2006 Elsevier Ltd. All rights reserved.