PCM蓄冷球蓄冷过程的动态研究  

Investigation on the Dynamic Characteristics of PCM Cold Storage Sphere for Charging Process

作　　者：李晓燕[1] 毕玉[1] LI Xiao -yan BI Yu(School of Energy and Building Engineering, Harbin University of Commerce, Harbin 150028 ,China)

机构地区：[1]哈尔滨商业大学能源与建筑工程学院,黑龙江哈尔滨150028

出　　处：《节能技术》2016年第5期418-422,共5页Energy Conservation Technology

基　　金：国家自然科学基金项目(51476049);哈尔滨商业大学研究生创新科研项目(YJSCX2015-352HSD)

摘　　要：针对蓄冷空调用蓄冷球,建立三维蓄冷球的物理模型和数学模型,利用ANSYS-FLUENT对蓄冷球内相变材料(PCM)的凝固过程进行了数值模拟。分析了蓄冷球半径、载冷剂温度和蓄冷球球壳材料对蓄冷时间及蓄冷特性的影响。结果表明:当蓄冷球半径和载冷剂温度相同时,蓄冷球材质的导热系数越大,完成蓄冷的时间越短。当蓄冷球的半径为35 mm,载冷剂温度分别为2℃、3℃、4℃、5℃时,与载冷剂温度为5℃相比,前者的蓄冷时间分别减少了58.72%、48.09%、29.70%。本研究对蓄冷空调用蓄冷球的蓄冷过程优化有重要的指导意义。In this paper, a 3 - dimensional numerical model of cold storage sphere was developed to simulate the charging process of the phase change material sphere, temperature of the heat transfer fluid （HTF） （PCM）. The effects of radius of the cold storage and the shell material of cold storage sphere on charging time and charging characteristics were investigated. The results show that the charging time decreases with the increase of heat conductivity coefficient 2℃, 3℃, 4℃, the time to reach the complete charging and 29.70%, compared to the temperature of HTF 5℃, of the shell material. For the HTF temperature was shorter by approximately 58.72%, 48.09% and the radius of the cold storage sphere was 35 mm. This study has an important significance on optimization of charging process in a cold storage sphere for use in cool storage air - conditioning.

关 键 词：相变材料 凝固过程 数值模拟 蓄冷球 蓄冷空调 

分 类 号：TU831.6[建筑科学—供热、供燃气、通风及空调工程]