摘要
蒸压加气混凝土与岩棉复合的围护墙板是一种新型的建筑围护结构板材,不需要附加保温层就可满足寒冷地区的热工要求。GB 50176—2016《民用建筑热工设计规范》就如何计算围护墙板的热工参数给出了计算方法,但需要相邻部分热阻比值不大于1.5,当热阻比值大于1.5时需要通过传热有限元计算考虑热桥的影响,给传热系数计算带来困难。基于此,提出了一种传热系数的简化计算方法,借助线性变截面的热传导公式,考虑了复合板肋部热桥影响,以综合传热系数最大为条件,得到了综合传热系数和综合热阻。利用所提出的计算方法对某工程外围护墙板进行了传热系数计算,并与有限元计算结果进行了对比,相差仅0.3%,可以满足工程设计要求。
The integrated lightweight composite wallboard made of autoclaved aerated concrete and rock wool panel is a new type of building enclosure system,which can meet the thermal requirements of cold areas in China without additional insulation.GB 50176—2016 The Code for Thermal Design of Civil Buildings gives a thermal calculation method,which requires the thermal resistance ratio of adjacent parts to be less than 1.5,or else it needs to consider the influence of heat bridge by heat transfer finite element calculation.The finite element method brings difficulties to thermal design.Therefore a heat transfer calculation method based on the linear variable cross-section considering the thermal bridge effect of the composite ribs is put forward,and the heat transfer coefficient and thermal resistance of the wallboard are obtained under the condition of maximum heat transfer.The heat transfer coefficient of the composite wallboard is calculated using the method in this paper,and the results are compared with the finite element calculation method,the difference is only 0.3%,which can meet the engineering design requirements.
作者
尚仁杰
杨潇
侯兆新
寅志强
孙小曦
SHANG Ren-jie;YANG Xiao;HOU Zhao-xin;YIN Zhi-qiang;SUN Xiao-xi(Central Research Institute of Building and Construction Co.,Ltd.,MCC Group,Beijing 100088,China;Nanjing Asahi New Building Materials Co.,Ltd.,Nanjing 210039,China)
出处
《混凝土与水泥制品》
北大核心
2020年第9期57-61,共5页
China Concrete and Cement Products
基金
国家重点研发计划项目(2017YFC0703807)。
关键词
复合墙板
传热系数
热工性能
建筑节能
Composite wallboard
Heat transfer coefficient
Thermal performance
Building energy efficiency
