管道嵌入式建筑围护结构作为一种重质热激活建筑系统(TABS),由于其管道内嵌于建筑围护结构内部,故目前在既有建筑改造中应用较少.本文提出了管道嵌入式相变复合墙体(PEPCW)的概念,其主要利用基于宏观封装的嵌管式相变板代替传统嵌管夹层,并将嵌管夹层移至承重层外侧,为解决既有建筑改造中应用这一技术提供了创新解决思路.本文利用经实验验证的数学模型评估了PEPCW的夏季热性能和节能潜力,结果表明,复合墙体内表面温度和热流可分别降低1.1℃和9.9 W·m-2.参数化模拟结果表明,管道间距相比相变夹层厚度对复合墙体热性能影响更为明显,所研究条件下的管道间距和相变层厚度建议取值为300/30 mm.通过对三个不同气候分区的典型城市(即天津、南京和广州)开展的应用评估结果还表明,PEPCW在改善室内热舒适度方面可以取得令人满意的效果,尤其是在夏热冬暖地区.此外,应用PEPCW可显著降低太阳辐射吸收率对不同朝向墙体热负荷的影响,三个向阳朝向的指标下降幅度高于北面.综合来看,PEPCW在供冷季节表现出令人满意的热性能,有助于推动嵌管式建筑围护结构在既有建筑中的节能改造应用.“,”Pipe-embedded building envelope is a heavyweight thermo-activated building system ( TABS) that has its pipe circuits inside the building envelope, which has been seldom studied in existing buildings. In this context, the pipe-embedded PCM composite wall ( PEPCW ) in which the pipe-embedded interlayer is relocated to the outside of the load-bearing layer and replaced by macro-encapsulation-based pipe-embedded PCM panel is proposed to address the retrofitting challenges. In this paper, the summer thermal performance and energy saving potential of PEPCW are evaluated through a validated mathematical model. The simulation tests verify the effectiveness of PEPCW in cooling load reduction, and the corresponding amplitude value of interior surface temperature and heat flux can be decreased by 1. 1 ℃ and 9. 9 W·m-2 , respectively. Besides, the parametric tests indicate that the pipe interval has a more obvious influence than PCM thickness, and the value of 300/30 mm ( pipe interval/PCM thickness) is recommended. Furthermore, the effectiveness of PEPCW is proved to be satisfactory in the three different cities ( i. e. , Tianjin, Nanjing, and Guangzhou ) , and the maximum heat gain reduction (i. e. , 39. 30 kWh · m-2 ) is observed in hot summer and warm winter region ( i. e. , Guangzhou). In addition, the influence of solar absorbance on conditioned space at different orientations can be remarkably reduced through PEPCW, and the reduction in the three sunny sides are relatively higher than the dark side (i. e. , north). Overall, the proposed PEPCW presents a satisfactory thermal behavior in the cooling season and could contribute to the progress of energy saving retrofit in the vast existing buildings.