Thermal performance of Al2O3/water nanofluid in a natural circulation loop with a mini-channel heat sink and heat source

被引：73
|
作者：
Ho, C. J. [1 ]
Chung, Y. N. [1 ]
Lai, Chi-Ming [2 ]
机构：
[1] Natl Cheng Kung Univ, Dept Mech Engn, Tainan 70101, Taiwan
[2] Natl Cheng Kung Univ, Dept Civil Engn, Tainan 70101, Taiwan
来源：
ENERGY CONVERSION AND MANAGEMENT | 2014年 / 87卷
关键词：
Nanofluid; Mini-channel; Heat sink; Heat source; Natural circulation loop; FLOW; INSTABILITY;
D O I：
10.1016/j.enconman.2014.07.079
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this study, the heat transfer characteristics of Al2O3-water nanofluid were investigated experimentally in a rectangular natural circulation loop of 402 mm in height and 205 mm in width. The 120-mm-long heated section and 155-mm-long cooling section in the loop were constructed with mini-channel heat exchangers. The nanometer-sized particles of alumina (Al2O3) were dispersed in pure water (the base fluid) to form the alumina-water nanofluid with mass fractions in the range of 0.1-1 wt.%. The results clearly indicate that Al2O3-water nanofluid can markedly enhance the heat-transfer performance of the natural circulation loop considered. The average heat-transfer effectiveness at the heating and cooling sections were approximately 3.5-22% and 9.5-62% respectively. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：848 / 858
页数：11
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