摘要
针对提高空心砖外墙保温性能有利于降低建筑能耗的问题，本文采用有限容积法，研究了空心砖孔内贴10mm保温层对建筑外墙保温性能的影响，并进行了三维复合传热的数值模拟分析。文中选取12种具有不同孔洞数和排列方式的240mm×115mm×90mm空心砖、4种不同导热系数的保温材料、两种厚度的空心砖外墙（24墙和37墙）作为研究对象。研究结果表明：砖孔内贴保温层可以有效提高墙体保温性能，24墙的墙体保温性能提高19．1％～59．3％，37墙的墙体保温性能提高16．9％～58．3％，尤其对于开孔率较大的砖型，采用该方法节能效果显著。
Improving the insulation performance of the hollow brick external wall is beneficial to reduce the building energy consumption. With the finite volume method this paper numerically investigated the possibility of improving the thermal performance of building external wall constructed with 240 mm × 115 mm × 90 mm hollow clay bricks. 3D complicated heat transfer was simulated by pasting 10 mm thick insulation material layer around holes. A comprehensive parametric investigation included 12 kinds of hollow clay bricks with different hole number and arrangement,4 different insulation materials and 2 different building external wall configurations( with the thickness of 240 mm or 370 mm). The numerical results show that pasting 10mm-thick insulation materials around holes in the hollow bricks can improve the insulation performance of building external wall obviously. For the case of the 24 wall,the percentage of improvement varies between 19. 1% and 59. 3%. For the case of the 37 wall,the percentage of improvement ranges from 16. 9% to 58. 3%. Especially,the optimum insulation effects are got when hollow brick has larger void fraction.
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2015年第5期30-35,41,共7页
Journal of Henan University of Science And Technology:Natural Science
基金
山西省自然科学基金项目(2014011033-2)
关键词
空心砖
保温材料
当量导热系数
数值模拟
hollow bricks
insulation material
equivalent thermal conductivity
numerical simulation
