建筑排风隔热外窗冬季结露机理与防治  

Condensation Risk of Exhaust Air Insulation Window:Mechanism and Prevention Measure

作　　者：张冲[1] 王劲柏[1] 李辽 刚文杰[1] ZHANG Chong;WANG Jin-bo;LI Liao;GANG Wen-jie(Department of Building Environment and Energy Engineering,Huazhong University of Science and Technology)

机构地区：[1]华中科技大学建筑环境与能源应用工程系

出　　处：《建筑热能通风空调》2022年第1期32-35,共4页Building Energy & Environment

基　　金：国家自然科学基金项目(No.51808239);香江学者计划(XJ2019044)。

摘　　要：本文利用数值传热模型,计算排风隔热窗在不同运行参数和室内外边界条件时的内部温度分布情况,并与排风露点温度进行比较,从而判断是否出现结露,确定出现结露的临界边界条件,提出避免冬季结露的措施。结果表明,使用Low-e玻璃可以有效避免该外窗在冬季结露的产生,在室外极端低温的情况下,则可在不损失热舒适的情况下,适当降低室内空调设定温度,同时配合提高排风速度,从而进一步提升排风隔热窗冬季防结露能力。A numerical model of EAW(Exhaust Air Window)was established to calculate its temperature distribution,and to further identify whether condensation will occur under different boundary conditions.The results show that adding a Lowe coating can effectively reduce the critical outdoor temperature of condensation and prevent the occurrence of condensation within the EAW.Controlling the indoor temperature or exhaust air velocity further helps to reduce the possibility of condensation.

关 键 词：排风隔热窗 主动隔热 冬季结露 露点温度 

分 类 号：TU83[建筑科学—供热、供燃气、通风及空调工程]