TiO2纳米颗粒形貌对热管工作性能的影响
Effects of TiO2 Nanoparticle Morphology on Working Performances of Heat Pipes
牛艳芳 1蒋丽丽 1王冬至 2杜润生 3赵蔚琳2
作者信息
- 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
- 折叠
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TiO2纳米颗粒,采用两步法制备3种形貌TiO2-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TiO2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TiO2-水纳米流体的导热系数大于菱状、棒状TiO2-水纳米流体和基液水的;当加热功率相同时,片状TiO2-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TiO2-水纳米流体热管,片状TiO2-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％.
Abstract
To study the effects of medium morphology on working process of heat pipes,TiO2 nanoparticles with rod,flaky,and rhombus shape were prepared by using hydrothermal method,and TiO2-water nanofluids with three morpholo-gies 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 TiO2 nanoparticle morphology on working performances of heat pipes were analyzed.The results show that the thermal conductivity of flaky TiO2-water nanofluids in heat pipes is greater than those of rhom-bus and rod-shaped TiO2-water nanofluids and base liquid water.When the heating power is same,the start-up tempera-ture of flaky TiO2-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 TiO2-water nanofluid heat pipes is 2-3 ℃smaller than the corresponding average temperature difference of the rod and rhombus-shaped TiO2-water nanofluid heat pipes,and the total thermal resistance is reduced by 4.4％-28.3％.
关键词
TiO2纳米颗粒/热管/工作介质Key words
TiO2 nanoparticle/heat pipe/working medium引用本文复制引用
基金项目
山东省自然科学基金(ZR2021ME193)
山东省科技型中小企业创新能力提升工程项目(2021)(2022TSGC1332)
出版年
2024
NETL
NSTL
万方数据