针对制约热激活类墙体注热效率提升的低品位热量集中堆积问题，提出了一种内部设有特定孔道并用于填充热扩散性填料的模块化热激活墙体（MTAW）。建立了MTAW动态传热模型，基于寒冷地区冬季气象条件对比分析了MTAW与两种参考墙体性能差异，探讨了填料腔倾角（θ值）、填料腔几何尺寸（a:b值）和填料导热系数（λf值）对节能潜力与经济性的影响。结果表明：墙体内部增设填料腔并填充热扩散性材料对于总运行能耗和运行费用节省效果显著，相比两种参考墙体，当MTAW填料腔长轴横置且a:b为1:2时，总运行能耗可分别减少2.60%和14.13%；相比两种参考墙体，MTAW总运行费用可分别平均减少12.41%和50.04%；填料腔长轴倾向室内侧时，供热能耗随θ值增大呈现先减小后增加的趋势，各项性能指标在θL为60°时更优；a:b值和λf值与总运行能耗和运行费用成反比，供热能耗和运行燃气费用降低率在λf为12λc时分别可达3.03%和34.53%。

A modular thermo-activated wall (MTAW) with special internal cavities for filling thermal diffusivity fillers is proposed to solve the problem of low-grade heat accumulation which restricts the improvement of heat injection efficiency of thermo-activated walls. The dynamic heat transfer model of MTAW was established., and performance differences between MTAW and two reference walls were compared based on typical winter conditions of the cold climate zone. The effects of the inclination angle (θ) and geometry size of the filler cavity (a:b), and thermal conductivity of the filling material (λf) on energy-saving potential and economics were discussed. Results show that the application of the filler cavity inside the wall and the filling of thermal diffusing material have a significant saving effect on the total operation energy consumption and operation cost. Compared with the two reference walls, when the long axis of the MTAW filler cavity is transverse and a:b is 1:2, the total operating energy consumption can be reduced by 2.60% and 14.13%. Compared with the two reference walls, the total operating cost of MTAW can be reduced separately by 12.41% and 50.04% respectively. When the long axis of the filler cavity is inclined to the room side, the heating energy consumption decreases first and then increases with the increase of θ, and the performance indexes are better when θL is 60°. The a:b and λf are inversely proportional to the total operating energy consumption and operating costs, and the reduction rate of heating energy consumption and operating gas cost can reach 3.03% and 34.53% respectively when the λf is 12λc.

TU86

国家自然科学基金项目（52208103）；安徽省自然科学基金(2108085QE241,2208085QE163)。