室内气温对绿化屋顶当量热阻的影响.pdf

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第37卷第2期
土木建筑与环境工程
Vol 37 No. 2
2015年4月
ournal of Civil, Architectural & Environmental Engineering
Ap.2015
doi:10.11835/j.issn.1674-4764.2015.02.017
室内气温对绿化屋顶当量热阻的影响
杨真静,熊珂,唐鸣放
(重庆大学建筑城规学院;山地城镇建设与新技术教育部重点实验室,重庆400045
摘要:绿化屋顶在节能设计中以附加当量热阻增大屋顶总热阻値,有效减少由屋顶进入室内的热
量,降低室内空气温度。但根据已有的实验研究,绿化屋顶隔热特性与室内气温是榻合关系,随室
内气温的变化,绿化屋顶会呈现出不同的隔热特性。用实验测试与数值模拟相结合的方法,分析在
不同室内气温下绿化屋顶、参照屋顶与等效保温屋顶内表面温度与热流的変化。结果表明:室内气
温会显著改变绿化屋顶的隔热性能,其当量热阻为与空内温度正相关的变量。在被动式建筑中,绿
化屋顶更能充分发挥隔热功效,且具有不向室内传热的特性。
关键词:绿化屋顶;当量热阻;数值模拟
中图分类号:TU111.19文献标志码:A文章编号:1674-4764(2015)02-0109-06
Influence of indoor temperature on equivalent
thermal resistance of green roof
Yang Zhenning, Xiong Ke, Tang Mingiang
(College of Architecture and Urban Planning; Key Laboratory of New Technology for Construction of Cities in Mountain Area
Ministry of Education, Chongqing University, Chongqing 400045, P. R. China
Abstract: Green roof contributes to high total thermal resistance of roof serving as additional equivalent
thermal resistance, which effectively reduces the heat gain from roof and lowers the indoor air temperature
However, current studies showed that the relationship of indoor temperature and thermal performance was
coupling and the performance of the green roof are different with the change of the indoor temperature.
Surface temperature and heat flux changes of green roof, reference roof and equivalent insulating roof were
analyzed respectively when the indoor temperature changed using both experiment and numerical
simulation. The results showed that the indoor temperature had significant impact on the insulation
performance of green roof and the equivalent thermal resistance had positive correlationwith the indoor
temperature. The insultation performance of green roof reduces heat gain in passive building. Key words:
green roof; equivalent thermal resistance; numerical simulation
Key words: green roof; equivalent thermal resistance; numerical simulation
收稿日期:2014-08-03
基金项目:重庆市科委前沿与应用基础研究(cstc2014 ljcyja90024);中央高校基本科研业务费(106112014 CDJZR190008)
作者简介:杨真静(1975-),女,博士,副教授,主要从事建筑节能、绿色建筑研究,(B-mail)young30331@163.com。
Received: 2014-08-03
Foundation item: Frontier and Application Fundamental Science of the Chongging Science Technology Commission(No
cstc2014jcyja90024); Fundamental Research Funds for the Central Universities, China(No
106112014 CDJZR190008)
Author brief: Yang Zhenjing(1975-), PHD, associate professor, main research interests: building energy efficiency and
greenbuilding,(e-mail)young30331(@163.com