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浙江大学学报(工学版)
浙江大学学报(工学版)
土木工程     
平屋顶遮阳通风层隔热的数值模拟分析
何方祥, 詹树林, 钱晓倩, 赖俊英
浙江大学 土木工程学系,浙江 杭州 310027
Numerical simulation on insulation of flat roof ventilation layer
HE Fang xiang, ZHAN Shu lin, QIAN Xiao qian, LAI Jun ying
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
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摘要：

为了解决传统大阶砖式通风屋面在外环境风速较小时隔热效果不好的问题,提出在通风道上表面或下表面贴铝箔的措施以提高其隔热性能.以传统大阶砖通风屋面为对照组,以在不同位置贴铝箔的通风间层为实验组,利用计算流体动力学（CFD）软件对其隔热效果进行数值模拟分析.分析前先对数值分析中用到的计算模型、方法和边界条件等进行验证,在一定程度上保证数值分析计算结果的可靠性.计算结果表明：在通风道上表面或下表面贴铝箔均能有效提高通风间层的隔热性能,且铝箔贴在通风道下表面时通风间层的隔热性能稍优于将铝箔贴在通风道上表面的情况,而在通风道上、下表面均贴铝箔对提高通风间层的隔热效果最为明显.考虑到铝箔贴在通风道下表面容易受到灰尘等杂物覆盖,建议在通风道单面贴铝箔时将铝箔贴在通风道的上表面.
Abstract:

Pasting aluminum foil upper or under the surface of air duct was proposed to improve the heat insulation, aming at the problem that the heat insulating ability of the traditional big order brick ventilated roof is not good when the wind speed is small. The traditional large order brick ventilated roof acted as a control group and the ventilation layers with pasting aluminum foil at different locations in the air duct acted as test groups. Analyze the heat insulation ability of the ventilation layer with computational fluid dynamics (CFD) software. The calculation model, numerical analysis methods and boundary conditions that used in the numerical analysis were first verified, which, to some extent, ensured the reliability of the numerical analysis results. Results show that pasting aluminum foil upper on under the surface of air duct can effectively improve the heat insulation performance of the ventilation layer. And the insulation performance with the aluminum foil pasted under the surface layer of the air duct is slightly better than the situation with the aluminum foil pasted upper the surface layer of the air duct. While, pasting the aluminum foil both upper and under the suface of air duct lead to the most obvious heat insulation effect. Considering that the aluminum foil under the surface air duct is easily to be covered by dust and other sundries, to past the aluminum foil upper the surface of air duct is suggested when a single surface of air duct is to be pasted.
出版日期: 2015-12-31
:  TU 114.4  
基金资助:

住宅能源自维持功能模块研制与性能优化资助项目（2013BAL01B01）.
通讯作者: 詹树林,男,教授,博导. ORCID: 0000 0002 2055 0937.     E-mail: jzcl@zju.edu.cn
作者简介: 何方祥（1989—）,男,硕士生,从事屋顶保温隔热研究. ORCID: 0000 0003 1738 2044. E-mail: 21312048@zju.edu.cn
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引用本文:

何方祥, 詹树林, 钱晓倩, 赖俊英. 平屋顶遮阳通风层隔热的数值模拟分析[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008 973X.2015.12.020.

HE Fang xiang, ZHAN Shu lin, QIAN Xiao qian, LAI Jun ying. Numerical simulation on insulation of flat roof ventilation layer. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008 973X.2015.12.020.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008 973X.2015.12.020    或    http://www.zjujournals.com/eng/CN/Y2015/V49/I12/2397

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