双层玻璃幕墙空腔通风的影响因素分析  

Analysis of Influencing Factors on Cavity Ventilation of Double Skin Facade

作　　者：何国青[1,2] 孟源 郭新雅 陈狄 叶长青[2] HE Guoqing;MENG Yuan;GUO Xinya;CHEN Di;YE Changqing(College of Civil Engineering and Architecture,Zhejiang University;Center for Balance Architecture of Zhejiang University;Zhejiang Yasha Curtain Wall Co.,Ltd.)

机构地区：[1]浙江大学建筑工程学院 [2]浙江大学平衡建筑研究中心 [3]浙江亚厦幕墙有限公司

出　　处：《建筑热能通风空调》2022年第3期1-5,16,共6页Building Energy & Environment

基　　金：国家自然科学基金(No.51678518)。

摘　　要：为双层玻璃幕墙(DSF)的空腔通风量提供了一种快速方便的计算方法,首次将太阳能烟囱烟羽模型用于空腔的通风,并分析了空腔深度,开口大小,室外温度以及太阳辐射等主要设计参数或环境因素对通风量的影响。结果显示,这些因素对空腔通风的影响是综合的,需要优化设计,避免出现制约参数。在没有出现制约因素的情况下,通风量随深度的增加、开口的增大和辐射的增强而增加。空腔侧则采用吸热玻璃可显著提高空腔的通风能力(28%~69%)。而空腔进出口环境温度的大小对通风量的影响可以忽略,但其温差的影响较大:正温差加强热压通风,负温差减弱热压通风。此外,在换气模式下,不论是在太阳能属于可利用的杭州还是在太阳辐射较弱的重庆,不论是在建筑西向还是在南向,过渡季白天的大部分时间(70%),DSF均可为办公室提供4个换气次数以上的通风量。A fast and simple method is proposed for the calculation of cavity ventilation of a Double Skin Facade(DSF).For the first time,the plume model is applied for such calculation purpose.The influences of main design parameters or environmental factors,such as cavity depth,opening sizes,ambient temperature,and solar radiation,on the ventilation rate were examined.Results show that the cavity depth,opening size,and solar heat gain have a holistic influence on the cavity flow rate.Optimization is required to avoid any of the parameters becoming a limiting factor.Unless there is a limiting factor,the ventilation flow rate increases as the increase of the depth,the opening size,and the solar radiation.In particular,the use of the thermal absorptive glazing can significantly increase the ventilation flow(by 28% to 69%).The ambient temperatures itself has negligible impact on the cavity flow rate;however,the temperature difference between indoors and outdoors has considerable influence.A positive temperature difference strengthens the buoyancy flow while a negative one weakens the buoyancy flow.Moreover,in the air changing mode during transition seasons,the DSF can provide an air change rate >4 h-1 during most of the daytime(70%),being it installed on the south wall or on the west wall and being it in Hangzhou,where solar energy is moderately utilizable,or in Chongqing,where solar energy is poor.

关 键 词：双层玻璃幕墙 通风量 烟羽模型 设计参数 

分 类 号：TU834[建筑科学—供热、供燃气、通风及空调工程]