3D numerical thermal optimization of the roofs constructed with cast-in-situ hollow concrete floor system by finite volume method
3D numerical thermal optimization of the roofs constructed with cast-in-situ hollow concrete floor system by finite volume method
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DOI：
10.1016/j.enbuild.2016.09.018
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发表时间：
2016-11
影响因子：
6.7
通讯作者：
G. Shi;Long Li;Chongfang Song;S. Cheng;W. Tao;Y. L. He
中科院分区：
文献类型：
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作者：
G. Shi;Long Li;Chongfang Song;S. Cheng;W. Tao;Y. L. He
为提高空心屋面的隔热性能，基于有限体积法，采用自编程序对空心屋面的共轭传热进行了三维数值模拟。通过有规律地设计隔墙来划分空腔，对8种不同箱式填充材料的空心屋盖进行了优化设计。此外，还考虑了盒填充材料对热行为的影响。计算结果表明：水平隔墙使屋面等效导热系数降低13.65%~ 40.42%，且对大空隙屋面的影响更为显著，而垂直隔墙对屋面等效导热系数的影响较小。此外，不同的盒填充材料可以带来不超过3%的微小变化。
3D numerical thermal simulation on conjugate heat transfer in hollow roofs is conducted by self-compiled program based on the finite volume method to improve insulation performance. Eight kinds of hollow roofs with different box fillers are optimized by regularly designing partitions to divide air-filled cavity. In addition, the effect of box filler materials on thermal behavior is considered. The numerical results demonstrate that: horizontal partitions decrease the equivalent thermal conductivity by 13.65%–40.42%, whose effect is more remarkable for higher void roofs, whereas vertical partitions cause few effects. Besides, different box filler materials can bring about slight variation no more than 3%.