含金属骨架复合PCM融凝过程传热特性研究  

Study of the heat transfer characteristics of melt-coagulation processes in PCM with metal skeletons

作　　者：尚荣真 陈宝明[1] 云和明[1] 崔云杰 SHANG Rongzhen;CHEN Baoming;YUN Heming;CUI Yunjie(College of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东建筑大学热能工程学院,山东济南250101

出　　处：《区域供热》2023年第2期85-92,共8页District Heating

基　　金：含固体骨架固液相变糊状区的界面传递机理研究国家自然科学基金(5197061221)。

摘　　要：为探究不同材料(Sn、Al、Cu)金属骨架对相变材料融化和凝固的影响,采用焓-孔隙率方法对复合相变材料进行三维数值模拟研究。结果表明,添加金属骨架可以加快相变材料的融化和凝固速率,并改善相变材料内部温度均匀性;对于融化过程,含不同材料金属骨架复合相变材料均受导热和自然对流的综合影响。对于凝固过程,骨架材料导热系数较低时,相变凝固受导热和自然对流对流共同影响,导热系数较高时,相变凝固主要受导热影响,自然对流的影响可以忽略不计;不同材料骨架对复合相变材料的蓄热量和放热量影响相差较小,但是随着骨架导热系数的增加,复合相变材料的蓄热率和放热率均增大。To investigate the effects of metal skeletons of different materials(Sn,Al,Cu)on the melting and solidification of phase change materials,three-dimensional numerical simulations of composite phase change materials are carried out using the enthalpy-porosity method.The results show that the addition of metal skeletons can accelerate the melting and solidification rates of the phase change materials and improve the internal temperature uniformity of the phase change materials;for the melting process,the composite phase change materials containing metal skeletons of different materials are affected by a combination of thermal conductivity and natural convection.For the solidification process,when the thermal conductivity of the skeleton material is low,the phase change solidification is affected by both thermal conductivity and natural convection convection,while the thermal conductivity is high,the phase change solidification is mainly affected by thermal conductivity and the effect of natural convection is negligible.However,as the thermal conductivity of the skeleton increases,the thermal storage and exothermic rates of the composite phase change material increase.

关 键 词：融化 凝固 传热方式 金属骨架 

分 类 号：TU111.4[建筑科学—建筑理论]