温度波作用下建筑内墙定型相变材料板的热特性  

THERMAL BEHAVIOR OF SHAPE-STABILIZED PHASE CHANGE MATERIAL AT INTERNAL BUILDING WALLS WITH TEMPERATURE WAVES

作　　者：周国兵[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《太阳能学报》2011年第8期1211-1216,共6页Acta Energiae Solaris Sinica

基　　金：河北省自然科学基金(E2008001231);国家"十一五"科技支撑计划项目子课题(2006BAA4B02)

摘　　要：通过数值模拟研究了正弦温度波作用下建筑内墙定型相变材料板的热特性并与传统的墙体材料——砖和泡沫混凝土板相比较。利用焓法建立的一维瞬态模型采用全隐差分格式迭代求解。计算结果表明,与砖和泡沫混凝土板相比,定型相变材料板表面温度变化不仅波幅有较大的衰减,时间延迟也较明显;相变温度是影响波幅衰减程度的重要因素;对于一定的温度波,相变材料潜热、导热系数和表面换热系数均存在极限值,超过此值,相变材料板表面温度受室内温度波动的影响很弱;相变材料板厚度对表面温度波动几乎无影响;相变温度区间的扩大使表面温度有轻微的波动。所得结果为太阳能建筑及相关领域中相变材料的选择与应用提供参考。Thermal behavior of shape-stabilized phase change material （SSPCM） at internal building walls with si- nusoidal temperature waves were investigated numerically and compared with traditional building materials--brick and foam concrete. One-dimension transient enthalpy equation was solved iteratively using fully implicit finite- difference scheme. The simulation results show that the SSPCM wallboard presents large decrement of temperature wave amplitude and delay of time by comparison with brick and concrete, phase transition temperature is one of the important factors which influence the decrement factor; for a certain temperature wave, there exist critical values of latent heat of fusion, thermal conductivity and convective heat transfer coefficient beyond which the wallboard sur- face temperature is scarcely influenced by the indoor temperature wave; the thickness of SSPCM almost has no effect on the surface temperature fluctuation; and large phase transition zone leads to slightly larger fluctuations of the surface temperature line. The results will to be useful for the selection of SSPCMs and their applications in pas- sive solar buildings and related areas.

关 键 词：定型相变材料 蓄能 热特性 建筑节能 衰减系数 

分 类 号：TU111.48[建筑科学—建筑理论]