TiO_(2)纳米颗粒形貌对热管工作性能的影响  

Effects of TiO_(2)Nanoparticle Morphology on Working Performances of Heat Pipes

作　　者：牛艳芳 蒋丽丽[1] 王冬至[2] 杜润生 赵蔚琳[2] NIU Yanfang;JIANG Lili;WANG Dongzhi;DU Runsheng;ZHAO Weilin(School of Engineering,Shandong Yingcai University,Jinan 250104,Shandong,China;School of Materials Science and Engineering,University of Jinan,Jinan 250022,Shandong,China;Lanling County Yixin Mining Technology Co.,Ltd.,Linyi 277700,Shandong,China)

机构地区：[1]山东英才学院工学院,山东济南250104 [2]济南大学材料科学与工程学院,山东济南250022 [3]兰陵县益新矿业科技有限公司,山东临沂277700

出　　处：《济南大学学报（自然科学版）》2024年第1期94-100,共7页Journal of University of Jinan(Science and Technology)

基　　金：山东省自然科学基金项目(ZR2021ME193);2021年山东省科技型中小企业创新能力提升工程项目(2022TSGC1332)。

摘　　要：为了研究介质形貌对热管工作过程的影响,利用水热法制备棒状、片状、菱状3种形貌的TiO_(2)纳米颗粒,采用两步法制备3种形貌TiO_(2)-水纳米流体,对热管内不同形貌工作介质的导热性能、热管工作过程的启动性能、等温性能和热阻进行试验研究,分析TiO_(2)纳米颗粒形貌对热管工作性能的影响。结果表明:热管内片状TiO_(2)-水纳米流体的导热系数大于菱状、棒状TiO_(2)-水纳米流体和基液水的;当加热功率相同时,片状TiO_(2)-水纳米流体热管启动温度最低,为(38.2±0.5)℃,并且相对于棒状、菱状TiO_(2)-水纳米流体热管,片状TiO_(2)-水纳米流体热管稳定工作时蒸发段与冷凝段的平均温度差减小2~3℃,总热阻减小4.4%~28.3%。To study the effects of medium morphology on working process of heat pipes,TiO_(2)nanoparticles with rod,flaky,and rhombus shape were prepared by using hydrothermal method,and TiO_(2)-water nanofluids with three morphologies were prepared by using two-step method.The thermal conductivity of working medium with different morphologies in heat pipes,start-up performance,isothermal performance,and thermal resistance of heat pipes working process were experimentally studied,and effects of TiO_(2)nanoparticle morphology on working performances of heat pipes were analyzed.The results show that the thermal conductivity of flaky TiO_(2)-water nanofluids in heat pipes is greater than those of rhombus and rod-shaped TiO_(2)-water nanofluids and base liquid water.When the heating power is same,the start-up temperature of flaky TiO_(2)-water nanofluid heat pipes is the lowest,which is(38.2±0.5)℃,and the average temperature difference between evaporation section and condensation section of the flaky TiO_(2)-water nanofluid heat pipes is 2-3℃smaller than the corresponding average temperature difference of the rod and rhombus-shaped TiO_(2)-water nanofluid heat pipes,and the total thermal resistance is reduced by 4.4%-28.3%.

关 键 词：TiO_(2)纳米颗粒 热管 工作介质 

分 类 号：TQ051.5[化学工程]