A COMPARISON ON THE HEAT TRANSFER AND FLOW CHARACTERISTICS OF TiO2-WATER NANOFLUIDS HAVING TWO DIFFERENT CHEMICAL AGENTS

被引：0
|
作者：
Duangthongsuk, Weerapun [1 ]
Wongwises, Somchai [1 ]
机构：
[1] SE Asia Univ, Fac Engn, Dept Mech Engn, Bangkok, Thailand
来源：
PROCEEDINGS OF THE 8TH INTERNATIONAL CONFERENCE ON NANOCHANNELS, MICROCHANNELS AND MINICHANNELS, 2010, PTS A AND B | 2011年
关键词：
LAMINAR-FLOW; POLYSTYRENE SUSPENSIONS; THERMAL-CONDUCTIVITY; PRESSURE-DROP; NANOPARTICLES; AUGMENTATION; TRANSPORT; TIO2; PIPE;
D O I：
暂无
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Heat transfer performance and flow characteristics of aqueous TiO2 nanofluids with particle volume fraction of 0.2% flowing under turbulent flow regime are investigated. The test section is a 1.5 m long counter-flow double tube heat exchanger. Two different nanofluids are used as working fluids at the same concentration. Firstly, TiO2 nanoparticles with mean diameters of 21 urn mixed with small amount of CTAB (about 0.01%) named "SAM 1". Secondly, VP Disp. W740x provided by DEGUSSA AG Company is used and called "SAM 2". The latter mixture is composed of TiO2 nanoparticle with average diameter of 21 nm dispersed in water. The pH values of nanofluid SAM 1 and SAM 2 are 7.6 and 7.5, respectively. The heat transfer performance and friction characteristics of two samples of nanofluid were presented. In addition, the Nusselt numbers predicted from the published correlation for nanofluids are compared with the present experimental data.
引用
收藏
页码：1389 / 1395
页数：7
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