基于热延长线系数的自保温砌块孔型设计方法与试验研究

Pass design method and experimental study of self-insulating block based on thermal extension line coefficient

建立了基于热延长线系数的自保温砌块孔型设计方法,采用ANSYS有限元软件分析了自保温砌块的热延长线系数、封闭空腔尺寸、芯体材料厚度、基体材料和芯体材料导热系数对自保温砌块热工性能的影响。研究表明:自保温砌块的热阻随着封闭空腔尺寸比的增大先增加后减小,并与热延长线系数和芯体材料厚度呈正相关,与基体材料和芯体材料的导热系数呈负相关;自保温砌块的热阻与孔肋热延长线系数、材料导热系数存在清晰的关系公式,并借此建立了适用于本模型的自保温砌块热阻计算公式;经试验测试,复合自保温砌块的热工性能和力学性能均满足高性能墙体材料的要求,所得结果可为墙体自保温系统的推广提供支持。

Based on the thermal extension line coefficient,the pass design method of self-insulating block was established.The influence of thermal extension line coefficient,closed cavity size,core material thickness,matrix material,and thermal conductivity coefficient of core material on the thermal performance of self-insulating block was analyzed by using ANSYS finite element software.The results show that the thermal resistance of the self-insulating block increases first and then decreases with the increase of the enclosed cavity size ratio,and is positively correlated with the thermal extension coefficient and the thickness of the core material,but negatively correlated with the thermal conductivity of the matrix material and the core material.There is a clear relation between the thermal resistance of the self-insulating block and the thermal extension coefficient of the rib and the thermal conductivity coefficient of the material.The calculation formula of the thermal resistance of the self-insulating block suitable for this model is established.The test results show that the thermal and mechanical properties of the composite self-insulation block meet the requirements of high-performance wall materials,and the results provide a more extensive choice for the promotion of the wall self-insulation system.