Role of Composition in Enhancing Heat Transfer Behavior of Carbon Nanotube-Ethylene Glycol Based Nanofluids

Bindushree, N and Dhabale, A and Dhanush, MS and Honakeri, A and Ankit, A and Anusha, MK and Kumar, R and Choudhary, HK and Khopkar, V and Sekhar, KC and Sahoo, B (2020) Role of Composition in Enhancing Heat Transfer Behavior of Carbon Nanotube-Ethylene Glycol Based Nanofluids. In: Electronic Materials Letters .

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Abstract

Abstract: We report the method of tuning the thermal conductivity through the composition of multiwall carbon nanotube (MWCNT) dispersed ethylene glycol based nanofluids. The structure and properties of the MWCNTs were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy and thermogravimetric analysis. A parallel plate thermal conductivity (PPTC) set up was fabricated and used for measurement of thermal conductivity of the nanofluids. We have prepared ethylene glycol based nanofluids containing 0.05, 0.1, 0.15, 0.20, 0.25 and 0.35 wt of MWCNTs. The thermal conductivities of these fluids were measured by keeping them between the two (parallel) plates, referred as the hot and the cold plates, of the sample holder in the PPTC apparatus. The lower plate was water-cooled and the upper plate was heated. The temperature of the hot plate was varied between 35 and 80 °C. The thermal conductivity of the fluids was calculated using the one-dimensional heat conduction equation. According to our observation, an efficient heat transfer occurs through the nanofluids with an optimum concentration of 0.20 wt of CNTs. Our work demonstrates the importance of the composition of the nanofluids and their structural defects in heat transfer. Graphic Abstract: Figure not available: see fulltext.. © 2020, The Korean Institute of Metals and Materials.

Item Type:	Journal Article
Publication:	Electronic Materials Letters
Publisher:	Korean Institute of Metals and Materials
Additional Information:	The copyright of this article belongs to Korean Institute of Metals and Materials
Keywords:	Aliphatic compounds; Ethylene; Ethylene glycol; Heat conduction; High resolution transmission electron microscopy; Multiwalled carbon nanotubes (MWCN); Nanofluidics; Nanotubes; Plates (structural components); Polyols; Scanning electron microscopy; Thermogravimetric analysis, Enhancing heat transfer; One-dimensional heat; Optimum concentration; Parallel plates; Sample holders; Scanning electrons; Structural defect; Structure and properties, Thermal conductivity of liquids
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	13 Nov 2020 09:29
Last Modified:	13 Nov 2020 09:29
URI:	http://eprints.iisc.ac.in/id/eprint/66647

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