严寒地区预制混凝土夹心保温外墙板内部冷凝问题研究  

Study on internal condensation of precast concrete sandwich facade panel in severe cold zones

作　　者：楚洪亮 吴自敏 阮浩 张鹏 CHU Hongliang;WU Zimin;RUAN Hao;ZHANG Peng(China Construction Engineering Research Institute Co.,Ltd.,Beijing 101300,China;China State Construction Technical Center,Beijing 101300,China;China Construction Science and Technology Co.,Ltd.,Beijing 100070,China)

机构地区：[1]中建工程研究院有限公司,北京101300 [2]中国建筑技术中心,北京101300 [3]中建科技有限公司,北京100070

出　　处：《混凝土》2021年第7期118-121,共4页Concrete

基　　金：“十三五”国家重点研发计划项目“近零能耗建筑技术体系及关键技术开发”(2017YFC0702600)。

摘　　要：以GB 20176—2016《民用建筑热工设计规范》为理论依据,以严寒地区典型城市气候条件为分析基础,选取模塑聚苯乙烯泡沫塑料保温板(简称EPS保温板)、挤塑聚苯乙烯泡沫塑料保温板(简称XPS保温板)、聚氨酯硬泡沫塑料保温板(简称PUR保温板)作为夹心保温层材料,研究预制混凝土夹心保温外墙板的内部的冷凝情况。分析计算满足标准规定的质量湿度允许增量要求的保温材料最小厚度δi·min,结果表明,在同样相对湿度计算条件下,XPS材料δi·min最低,EPS次之,PUR最高;同类保温材料在冬季室外温度更低而采暖期更长的区域δi·min更大;同一城市同类保温材料δi·min随室内相对湿度升高而增加的幅度在11-21 mm范围;同一城市同类保温材料δi·min随室外相对湿度升高而增加的幅度在2 mm以内。Based on the standard GB 20176—2016 and typical urban climate conditions in severe cold zones,EPS insulation board,XPS thermal insulation board,and PUR thermal insulation board were selected as the sandwich insulation layer material to study the condensation of precast concrete.The minimum thicknessδi·min of thermal insulation material meeting the allowable increment of the weight of the humidity specified in the standard is calculated.The results show thatδi·min of XPS material is the lowest under the same relative humidity calculation condition,followed by EPS and PUR.δi·min of the same kind of insulation materials is larger in areas with lower outdoor temperature and longer heating period in winter.δi·min of the same kind of insulation materials in the same city increases with the increase of indoor relative humidity in the range of 11 mm to 21 mm and increases within 2 mm when the outdoor relative humidity increases.

关 键 词：严寒地区 预制混凝土夹心保温外墙板 EPS保温板 XPS保温板 PUR保温板 冷凝验算 

分 类 号：TU528.7[建筑科学—建筑技术科学]