周期性边界条件下PCM填充墙体空间分布形式的传热影响  

INFLUENCE ON HEAT TRANSFER OF SPACIAL DISTRIBUTION FORM OF PCM FILING WALL UNDER CIRCUMSTANCE OF PERIODIC BOUNDARIES

作　　者：孟凡康[1] 褚琦[1] 王朔 巩云坤 胡仿聪 韩路 Meng Fankang;Chu Qi;Wang Shuo;Gong Yunkun;Hu Fangcong;Han Lu(School of Architecture Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学建筑工程学院

出　　处：《太阳能学报》2019年第10期2851-2856,共6页Acta Energiae Solaris Sinica

基　　金：辽宁省教育厅项目（LJ2017QL035）;辽宁省科学事业公益研究基金（20170044）;河北省重点研发计划（18394313D）;辽宁省大学生创新创业计划（201610147000006）

摘　　要：为充分发挥定量相变材料在填充墙体中的作用,在相同体积含量和周期性边界条件下以4种空间分布形式相变材料(PCM)填充墙体为研究对象,采用enthalpy-porosity法,讨论PCM填充墙体不同空间分布形式对墙体内/外壁面温度波幅、热流密度、温度延迟等参数的影响,并得出:1)4种形式墙体内部各点温度按照一定振幅随时间周期性波动,由内向外依次呈幂函数形式变化,且同一时刻墙体内部的温度分布呈周期性波动;2)并非全部分散PCM层都能发挥相变蓄热作用,需在设计之初进行室内/外环境、墙体热工性能、PCM层布置位置的综合考量;3)随着分散程度的加剧,墙体内表面温度和热流密度波幅越小,延迟时间越长。To enable the quantitate phase change material to perform fully its function in the filling wall,under the condition of the same volume content and the periodic boundaries,make the four kinds of spacious distribution PCM filling wall as the research object,use the method of enthalpy-porosity,and discuss the effect of the various spacious distribution of PCM filling wall on the temperature amplitude of inner and outer walls,heat flux and delaying of temperature. Some conclusions are acquired as follow:1)the inner temperature of the 4 kind walls fluctuate according to the definite swing periodically with time;the swing amplitude of the temperatures changes with the power function law from the inside to the outside. The distributions of the temperatures of the inside wall at the same time shows periodical fluctuation. 2)Not all dispersing PCM can perform phase heat storage. To perform the effect of the heat transfer of the quantative PCM filling,one should evaluate completely the indoor and outdoor environment,the properties of the wall and the location of the PCM before design. 3)with the increase of the dispersing degree of the quantative PCM in the walls,the less the temperature of the wall surface and the heat flux density amplitude is,the longer the delaying time is.

关 键 词：填充墙体 相变材料 空间分布 传热 计算机模拟 

分 类 号：TK02[动力工程及工程热物理]