Application of CNT nanofluids in a turbulent flow heat exchanger

Walvekar, Rashmi and Siddiqui, Mohammad Khalid and Ong, SeikSan and Ismail, Ahmad Faris (2015) Application of CNT nanofluids in a turbulent flow heat exchanger. Journal of Experimental Nanoscience, 11 (1). pp. 1-17. ISSN 17458080

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Abstract

Nanofluids have received much attention since its discovery owing to its enhanced thermal conductivity and heat transfer characteristics which makes them a promising coolant in heat transfer application. In this study, the enhancement in heat transfer of carbon nanotube (CNT) nanofluids under turbulent flow conditions is investigated experimentally. The CNT concentration was varied from 0.051 to 0.085 wt%, respectively. The nanofluid suspension was stabilised by gum arabic through a process of homogenisation and water bath sonication at 25'C. The flow rate of cold fluid (water) is varied from 1.7 to 3 L/min, while flow rate of the hot fluid is varied between 2 and 3.5 L/min. Thermal conductivity, density, and viscosity of the nanofluids are also measured as a function of temperature and CNT concentration. The experimental results were validated with theoretical correlations for turbulent flow available in the literature. Results showed an enhancement in heat transfer between 9% and 67% as a function of temperature and CNT concentration.

Item Type:	Article (Journal)
Additional Information:	1743/42763
Subjects:	T Technology > TJ Mechanical engineering and machinery
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof Dr Ahmad Faris Ismail
Date Deposited:	30 Apr 2015 15:38
Last Modified:	03 Apr 2017 11:53
URI:	http://irep.iium.edu.my/id/eprint/42763

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