十八醇/ZIF-8定形复合相变材料制备及其蓄热器模拟  

FABRICATION OF OCTADECANOL/ZIF-8 SHAPE STABLIZED COMPOSITE PHASE CHANGE MATERIALAND THERMAL SIMULATION OF HEATACCUMULATOR

作　　者：侯俊英 杨金星 郝建军[1] 侯传源 李建昌[1] 王雅雅 Hou Junying;Yang Jinxing;Hao Jianjun;Hou Chuanyuan;Li Jianchang;Wang Yaya(College of Mechanical and Electrical Engineering,Hebei Agricultural University,Baoding 071001,China)

机构地区：[1]河北农业大学机电工程学院,保定071001

出　　处：《太阳能学报》2023年第11期434-442,共9页Acta Energiae Solaris Sinica

基　　金：河北农业大学人才引进专项(YJ201815);河北省省属高校基本科研业务(KY2022017);河北省重点研发计划(18227209D)。

摘　　要：制备一种新型的定形复合相变材料,以十八醇(OD)为相变芯材,ZIF-8金属有机骨架为载体,制备出质量分数为50%~80%OD/ZIF-8定形复合相变材料。扫描电镜(SEM)结果显示:ZIF-8孔道内的毛细作用力可有效吸附十八醇,其最大负载量可达80%;X射线衍射(XRD)、傅里叶红外光谱(FT-IR)结果显示OD与ZIF-8之间只是物理结合,未发生化学变化;差示扫描热仪(DSC)测试结果表明:质量分数为80%的OD/ZIF-8在60℃下循环加热—冷却50次后,熔化焓未显著降低,说明此复合相变材料具有良好的热循环稳定性。另外,根据质量分数为80%的OD/ZIF-8的导热系数为0.2982 W/(m·K),以质量分数为80%OD/ZIF-8为蓄热介质对蓄热器进行Fluent模拟分析,分别研究新型管束布置方式及添加翅片两种强化传热方式对蓄热器蓄热效果的影响规律。We prepared 50%-80%OD/ZIF-8 composite phase change materials(PCMs)with the octadecanol(OD)as core material and the ZIF-8 as a supporting material.SEM images results show that the octadecanol was absorbed in the pore of ZIF-8 by capillary adsorption force,the loading of OD can reach 80%.XRD and FT-IR analysis showed the octadecanol and ZIF-8 were only physically combined with no chemical changes.DSC results show that the 80%OD/ZIF-8 composite PCM is heated-cooled at 60℃for 50 times,the latent heat of was no significant decrease,Indicating the 80%OD/ZIF-8 composite PCM has excellent thermal stability.In addition,according to the thermal conductivity of 80%OD/ZIF-8,the fluent simulation was used to verify the influence of accumulator.Furthermore,we study the influence of heat storage by rearrange the tube bundle and addition fins.

关 键 词：储能 相变材料 十八醇 金属有机骨架 蓄热器 模拟 

分 类 号：TK02[动力工程及工程热物理]