Influence of nanofluids and rotation on helically coiled tube heat exchanger performance

被引：59

作者：

Narrein, K. ^{[1
]}

Mohammed, H. A. ^{[2
]}

机构：

[1] Seksyen U1, Jalan Perintis U1 52, Shah Alam 40150, Selangor Darul, Malaysia

[2] Univ Teknol Malaysia, Fac Mech Engn, Dept Thermofluids, Skudai 81310, Johor Bahru, Malaysia

来源：

THERMOCHIMICA ACTA | 2013年 / 564卷

关键词：

Helically coiled tube heat exchanger; Rotation effect; Nanofluids; Heat transfer enhancement; FLUID-FLOW; TRANSFER ENHANCEMENT; NATURAL-CONVECTION; MAGNETIC-FIELD; PIPES; ENCLOSURE; CYLINDER;

D O I：

10.1016/j.tca.2013.04.004

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The effects of using various types of nanofluids and rotation on heat transfer and fluid flow characteristics in a helically coiled tube heat exchanger (HCTHE) are numerically investigated. Mainly, the effects of nanoparticles type (Al2O3, SiO2, CuO, ZnO), its concentration (1-4%), and particle diameter (25-80 nm), base fluid type (water, ethylene glycol, engine oil), towards the heat transfer and fluid flow characteristics are comprehensively analyzed. The three-dimensional steady, laminar flow and conjugate heat transfer governing equations of a balanced HCTHE are solved using the finite volume method. The results reveal that nanofluids can enhance the thermal properties and performance of the HCTHE but it is accompanied with a slight increase in pressure drop. It is found that the Nusselt number is highest using CuO-water nanofluid in this study. In addition, rotation can be used to enhance the heat transfer rates. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：13 / 23

页数：11

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