摘要
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(modular thermo-activated wall,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2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2种参考墙体,当MTAW填料腔长轴横置且a∶b为1∶2时,总运行能耗分别减少2.60%和14.13%;相比2种参考墙体,MTAW总运行费用分别平均减少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时分别为3.03%和34.53%。
A modular thermo-activated wall(MTAW)with specialized internal cavities for thermal diffusivity fillers was proposed to solve the problem of low-grade heat accumulation,which restricts the heat injection efficiency of thermo-activated walls.A dynamic heat transfer model of the MTAW was established.,and its performance was compared with two reference walls under typical winter conditions in a cold climate zone.The study examined the effects of the filler cavity inclination angle(θ),cavity geometry ratio(a∶b),and thermal conductivity of the filling material(λf)on energy-saving potential and economic performance.Results show that incorporating filler cavities and thermal diffusing materials significantly reduces total operational energy consumption and costs.Compared with the reference walls,when the the MTAW filler cavity’s long axis is oriented transversely with an a∶b ratio of 1∶2,the total operational energy consumption decreases by 2.60%and 14.13%,respectively.Compared with the reference walls,operational costs are reduced by 12.41%and 50.04%,respectively.When the long axis of the filler cavity is inclined toward the room side,heating energy consumption initially decreases and then increases asθrises,with optimal performance observed atθL=60°.Additionally,a∶b andλf are inversely proportional to both total operational energy consumption and costs.For example,whenλf is 12λc,heating energy consumption and gas operating costs are reduced by up to 3.03%and 34.53%,respectively.
作者
陈萨如拉
陈天航
杨洋
CHEN Sarula;CHEN Tianhang;YANG Yang(School of Architecture and Urban Planning,Anhui Jianzhu University,Hefei 230601,P.R.China;College of Architecture and Art,Hefei University of Technology,Hefei 230601,P.R.China)
出处
《重庆大学学报》
北大核心
2025年第2期74-85,共12页
Journal of Chongqing University
基金
国家自然科学基金(52208103)
安徽省高校优秀科研创新团队(2022AH010021)。
关键词
热激活建筑系统
模块化构造
模拟仿真
能源效率
经济性分析
thermo-activated building system
modular construction
simulation
energy efficiency
economic analysis
