首页|干式装配式墙体非均匀性传热规律

干式装配式墙体非均匀性传热规律

Non-uniformity of Heat Transfer in Prefabricated Wall

扫码查看
干式连接的装配式建筑因连接缝的存在会造成接缝与墙体间的传热不均,对墙体传热及建筑能耗产生重要影响.分析了干式装配外墙的非均匀传热特征,提出外墙内表面的累计温差比T′来评价墙体的传热非均匀性,确定了干式装配墙体传热的非均匀判定准则.提出用热桥影响区域等效传热系数K′T来评价接缝非均匀传热影响区域,分析了非均匀性传热对建筑采暖能耗的影响.结果表明,装配式墙体在接缝两侧的温度波动较大,且墙体构造越复杂波动越显著.干式装配墙体接缝的非均匀影响区域明显大于传统砖混建筑.T′越大墙体传热越不均,建筑采暖能耗越大.接缝宽每增加 5mm导致的墙体传热不均使得建筑能耗变化约为3%~4%,含空气层的预制墙体变化尤为大,约为3.2%~6.7%.
The joints in dry-connected assembled buildings caused significant heat transfer unevenness between joints and walls,which has an important impact on wall heat transfer and building energy consumption.The non-uniform heat transfer characteristics of dry-assembled exterior walls are summarized by site testing.The cumulative temperature difference ratio(T′)of the inner surface of exterior wall is proposed to quantitatively evaluate the non-uniformity of heat transfer of wall,and the criterion of non-uniformity of heat transfer of dry-assembled wall is determined.The equivalent heat transfer coefficient(K′T)is used to evaluate the influence area of non-uniform heat transfer of joints.The influence of non-uniform heat transfer on building heating energy consumption is analyzed.The results show that the temperature fluctuation of the assembled wall is large on both sides of the joints,and the more complex the wall structure is,the more significant the fluctuation is.The non-uniform influence area of dry-assembled wall joints is obviously larger than that of traditional brick-concrete buildings.The larger is,the more uneven the wall heat transfer is,and the greater the building heating energy consumption is.The uneven heat transfer of the wall caused by the increase of 5 mm joint width makes the building energy consumption change about 3%~4%,the change of the prefabricated wall containing air layer is particularly large,about 3.2%~6.7%.

prefabricated buildingdry connection splice seamheat transfer in wallsnon-uniformity

刘大龙、冯本成、胡宋舒

展开 >

西安建筑科技大学,西安 710055

西安建筑科大工程技术有限公司,西安 710055

装配式建筑 干式连接拼接缝 墙体传热 非均匀性

西安建筑科大工程技术有限公司科研项目(2022)国家自然科学基金

XAJD-YF22N00451878536

2024

建筑节能(中英文)
中国建筑东北设计研究院有限公司

建筑节能(中英文)

CSTPCD
影响因子:0.695
ISSN:2096-9422
年,卷(期):2024.52(3)
  • 13