既有办公建筑外窗改造方式的分析研究  

Analysis and Research on the Transformation Mode of External Windows of Existing Office Buildings

作　　者：周亚平 陈宁 ZHOU Yaping;CHEN Ning(Jiangsu Qianjun Engineering Testing Consulting Co.,Ltd.,Nanjing 214000,China;Jiangsu Shuobai Building Technology Co.,Ltd.,Nanjing 214000,China)

机构地区：[1]江苏千骏工程检测咨询有限公司,南京214000 [2]江苏硕佰建筑科技有限公司,南京214000

出　　处：《建筑节能（中英文）》2023年第7期97-102,共6页Building Energy Efficiency

摘　　要：以南京具有代表性的小面积多层机关办公建筑为例,采用DeST-C软件进行模拟分析,对该类办公建筑外围护结构中外窗改造方式进行了研究,通过对围护结构改造节能贡献率、外窗节能改造方式以及外窗更换改造的玻璃类型选择进行分析,结果表明:外围护结构改造的节能贡献率分别为:外窗>外墙>屋面,年累计负荷降低比例分别为15.29%、10.07%和4.21%,应优先考虑对外窗进行改造。对于较为老旧的铝合金单玻窗,采用贴膜方式改造时,年累计负荷相比于老旧建筑的降低比例仅为1.20%,效果十分有限,不建议采用。而外窗更换改造时,采用热工性能更优异的中透光外窗,年累计负荷相比于采用高透光外窗不仅没有提升,反而降低了0.19%。说明夏热冬冷地区进一步提升外窗的热工性能参数,虽然增加了成本投入,但对节能的进一步提升贡献比较有限。应同步考虑采用活动外遮阳,在冬季时减少影响,而在夏季时尽可能降低进入室内的太阳辐射得热,才能将外窗改造的节能效益发挥到最大。Taking the representative small-area multi-storey office building in Nanjing as an example,the transformation methods of external windows in the outer envelope of this kind of office building are studied by using DeST-c software.Through the analysis of the energy-saving contribution rate of envelope transformation,the energy-saving transformation methods of external windows and the selection of glass types for the replacement and transformation of external windows,the results show that the energy-saving contribution rate of the peripheral protective structure transformation is:external window>external wall>roof,and the annual cumulative load reduction ratio is 15.29%,10.07%and 4.21%respectively.The external window transformation should be given priority.For the relatively old aluminum alloy single glass window,when the film is used for transformation,the annual cumulative load is only 1.20%lower than that of the old building,and the effect is very limited,so it is not recommended to use it.During the replacement and transformation of the outer window,when the medium transparent outer window with better thermal performance is adopted,the annual cumulative load is not increased compared with the high transparent outer window,but it decreases by 0.19%.This shows that further improving the thermal performance parameters of external windows in hot summer and cold winter areas has increased the cost investment,but its contribution to the further improvement of energy saving is relatively limited.The use of active external shading should be considered simultaneously to reduce the impact in winter and reduce the solar radiation heat gain entering the room as much as possible in summer,so as to maximize the energysaving benefits of the transformation of external windows.

关 键 词：夏热冬冷地区 围护结构改造 节能贡献率 玻璃贴膜 

分 类 号：TU111.4[建筑科学—建筑理论]