Influence of pH and SDBS on the Stability and Thermal Conductivity of Nanofluids

被引：116
|
作者：
Wang, Xian-ju [1 ]
Li, Xinfang [2 ]
Yang, Shuo [1 ]
机构：
[1] S China Univ Technol, Minist Educ, Sch Chem & Energy Engn, Key Lab Enhanced Heat Transfer & Energy Conservat, Guangzhou 510641, Guangdong, Peoples R China
[2] Zhongshan Torch Vocat & Technol Coll, Zhongshan 528436, Peoples R China
来源：
ENERGY & FUELS | 2009年 / 23卷 / 5-6期
基金：
中国国家自然科学基金;
关键词：
ENHANCEMENT; TRANSPORT;
D O I：
10.1021/ef800865a
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Aiming at the dispersion of nanoparticles which are regarded as the guide of heat transfer enhancement, we investigated the heat transfer enhancement of two water-based nanofluids, namely, water-Al2O3 and water-Cu mixtures. The absorbency, potential, and thermal conductivity of the nanofluids were measured under different pH values and different sodium dodecylbenzene sulfonate (SDBS) dispersant concentrations. The results showed that the stability and thermal conductivity of nanofluids were highly dependent on pH values and SDBS concentrations of nanosuspensions; an optimal pH value and optimal SDBS concentration can result in the highest stability and thermal conductivity of the nanofluids. Therefore, the combined treatment with both the pH and the chemical surfactant concentration was recommended to improve the stability and thermal conductivity for practical applications of nanofluid.
引用
收藏
页码：2684 / 2689
页数：6
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