Al_2O_3-H_2O纳米流体的相变蓄冷实验研究  

EXPERIMENTAL STUDY ON PHASE CHANGE COOL STORAGE OF AL_2O_3-H_2O NANOFLUIDS

作　　者：吴淑英[1] 朱冬生[1] 杨硕[1] 

机构地区：[1]华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室,广东广州510641

出　　处：《工程热物理学报》2009年第6期981-983,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.20346001);广州市科技计划项目资助(No.2008Z1-1061)

摘　　要：通过在水介质中添加纳米氧化铝粒子,研制了一种新型传热冷却工质一氧化铝-水纳米流体,粒径分布显示了加入分散剂的悬浮液具有很好的分散性,同时对Al_2O_3-H_2O纳米流体和水溶液的结冰过程进行了实时观察。结果表明,加入Al_2O_3纳米粒子后,流体的结冰速率得到了很大提高,结冰时间大大缩短,DSC测试结果得到0.1%Al_2O_3-H_2O纳米流体的相变潜热值为313.1 J/g。A procedure for preparing a nanofluid which is a solid-liquid composite material consisting of solid nanoparticles with sizes typically of 1-100 nm suspended in liquid was presented. By means of the procedure, Al2O3-H2O nanofiuids with and without dispersant were prepared, whose particle size distributions were given to illustrate the stability and evenness of suspension with dispersant. Meanwhile, the ice formation of nanofluids and water was studied by real-time observation. The results showed that the addition of Al2O3 nanoparticles remarkably accelerated the rate of ice formation and reduced the total freezing time. By the differential scanning calorimeter （DSC） measurement, the latent heat storage capacity for 0.1% Al2O3-H2O nanofluids was 313.1 J/g.

关 键 词：Al2O3-H2O纳米流体 结冰时间 相变储能 

分 类 号：TK124[动力工程及工程热物理—工程热物理]