Effect of nanoparticle size and concentration on boiling performance of SiO2 nanofluid

被引：50
|
作者：
Hu, Yanwei [1 ]
Li, Haoran [1 ]
He, Yurong [1 ]
Liu, Ziyu [1 ]
Zhao, Yunhua [2 ]
机构：
[1] Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Peoples R China
[2] Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2017年 / 107卷
基金：
中国国家自然科学基金;
关键词：
Pool boiling; SiO2; nanofluids; Heat flux; Heat-transfer coefficient; Nanoparticle coating; CRITICAL HEAT-FLUX; ETHYLENE GLYCOL NANOFLUIDS; THIN-FILM SURFACE; THERMAL PERFORMANCE; WATER; AL2O3; ENHANCEMENT; PLATE;
D O I：
10.1016/j.ijheatmasstransfer.2016.11.090
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The suspension of nanoparticles into transitional heat-transfer media could be an alternative to conventional fluids. The present work experimentally investigates the boiling heat-transfer characteristics of ethylene glycol (EG) and water (H2O) mixture based SiO2 nanofluid under realistic conditions. An EG aqueous solution with a volume fraction of 60% was used as the base fluid owing to its perfect freeze proofing performance. Stable nanofluids were formulated through magnetic stirring and ultrasonic treatment and the effect of the nanoparticle size and concentration on the boiling characteristics of the nanofluids were considered. The results show that the boiling heat-transfer coefficient (HTC) increased when decreasing the nanoparticle diameter from 120 nm to 84 nm. In addition, with the increase of nanoparticle concentration, the HTC first increased rapidly and then exhibited negative growth in the concentration range 0.25-1.00%. Moreover, the HTC deteriorated for nanoparticle volume fractions above 0.75%. Based on the experimental results, the probable mechanism of the boiling heat transfer caused by the nanoparticle coating is qualitatively analyzed. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：820 / 828
页数：9
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