混凝土空心砌块热导率的计算方法

Calculation Method for the Thermal Conductivity of Hollow Concrete Block

随着人们对节能的重视,热导率等热工指标已经在工程设计中广泛应用。但是在建设工程中常用的混凝土空心砌块规格未能满足现有平板热导率仪对试件规格的要求,因此不能直接测定其热导率。根据GB50176-93《民用热工设计规范》附录二中相关公式,举例说明如何根据实测到的空心砌块的外形尺寸和基材的热导率,计算空心砌块的热导率。

As people attached more importance to energy saving, thermal indexes, such as thermal conductivity, have already been widely used in engineering design. However, the usual hollow concrete block fails to meet the specification requirements of the existing flat-panel thermal conductivity instrument to the samples in the construction engineering. Therefore, their thermal conductivity can not be measured directly. According to the related formula in Appendix H of ＂Thermal Design Code for Civil Buildings ＂（GB 50176-93）, illustrated that how to calculate the thermal conductivity of concrete block based on the actual measured overall dimension of the concrete block and thermal conductivity of the substrate material.