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增加砌块厚度或填充保温材料都可以有效提高砌块平均热阻,却无形中增加了建筑成本,而通过优化砌块空间布局来提高热阻却是近零成本的方法。该论文使用CFD方法建立空心砌块的数值模型,模拟计算得到了砌块的平均热阻,其值与理论计算结果相近。然后采用该模拟方法分别研究了空心砌块、完全填充复合砌块和不完全填充复合砌块的空间布局优化没计。得到以下重要结论:(1)芯材与基材的热导率之比越小,砌块空间布局对砌块的平均热阻影响越大;(2)砌块块型设计应尽量使各并联热路的传热阻相等。
Increasing block thickness or filling insulation materials can effectively improve the average block resistance, but virtually increase the cost of the building, and by optimizing the block layout to improve the thermal resistance is a near zero cost method. In this paper, the CFD method is used to establish the numerical model of hollow block. The average thermal resistance of the block is obtained by simulation and its value is similar to the theoretical calculation. Then, this simulation method is used to study the spatial layout optimization of hollow block, fully filled composite block and incompletely filled composite block respectively. The following important conclusions are obtained: (1) The smaller the ratio of the thermal conductivity between the core material and the substrate, the greater the influence of block space layout on the average thermal resistance of the block; (2) Heat transfer resistance equal.