粉煤灰挤塑泡沫复合保温砌块传热性能的数值模拟及优化研究

采用数值计算的方法对粉煤灰挤塑泡沫复合保温砌块的1个砌筑单元进行模拟,得出砌块的稳态温度场、表面热流曲线等,计算出有效导热系数,与实验测试结果进行比较,得出模拟值与实验测试值相差仅为4.4%;根据砌块的表面热流曲线,分析出砌块连接部位的热桥是影响保温的重要因素;最后,提出提高砌块的保温性能的具体方案。对以后此类材料的研究或生产,提供了一定的理论依据和新的思路。

Numerical Simulation and Optimization Research of Fly Ash Extruding Foam Insulation Composite Block Heat Transfer Performance

In this paper,using a numerical simulation of fly ash extruding composite foam insulation masonry block units,obtaines steady-state temperature field of block, heating curve of the surface;gets out the effective thermal conductivity comparing with experimental test results,the difference of the test simulation and the experimental value is only 4.4%;In accordance with the surface heat block curve,analyses that the thermal bridge of connecting the block parts is an important factor in the impact of thermal i...