Solangi, K. H. and Larik, T. A. and Memon, I. A. and Abro, A. A. and Kazi, S. N. (2023) Effect of different tube sizes on heat transfer characteristics of functionalized GNP and metal oxide nanofluids in conduit flow heat exchanger. Journal of Thermal Analysis and Calorimetry, 148 (24). pp. 13775-13790. ISSN 1388-6150, DOI https://doi.org/10.1007/s10973-023-12595-2.
Full text not available from this repository.Abstract
This study demonstrates the enhanced heat transfer characteristics of functionalized propylene glycol-treated graphene nanoplatelets (FPG-Water), trimethylolpropane tris poly(propylene glycol), amine terminated] ether-treated graphene nanoplatelets (FTM-Water), Al2O3 and SiO2 nanofluids. Test sections made of stainless steel 316 circular tubes with different diameters (2 mm, 4 mm and 15 mm) were used at a consistent bar of heat flux 23,870 W m(-2). A covalent functionalization technique was used for developing exceedingly scattered FPG-Water- and FTM-Water-based nanofluids. The recorded thermo-physical properties of all the samples showed remarkable performance. By inspecting the size effect, the 2-mm-diameter test section showed highest heat transfer coefficient up to 116.4% in FPG-Water at 0.1mass% compared to base fluid. In 4-mm- and 15-mm-diameter test sections the highest heat transfer coefficient was detected to 100.6% and 91.7%. Moreover, Al2O3 and SiO2 nanofluids exhibited decent enrichment in the heat transferal coefficients of up to 32.2% and 34.6% correspondingly. Besides, friction factor and Nusselt number showed a good degree of enhancement in all tested nanofluids. These findings give significant insight into the fluid flow and heat transfer properties of conduit flow heat exchangers, as well as perspective pathways for increasing thermal performance. The heat transfer coefficient and friction factor of FPG-Water and FTM-Water nanofluids obtained in this paper can contribute to design the advanced level heat exchangers for industrial purpose.
| Item Type: | Article |
|---|---|
| Funders: | University of Malaya's Faculty of Engineering, Kuala Lumpur, Malaysia [Grant No: UM. K/636/1/HIR (MOHE)/ENG45], UMRG [Grant No: RP012A-13AET] |
| Uncontrolled Keywords: | Nanofluids; Heat transfer; Stainless steel; Nusselt number; Functionalization |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 03 Nov 2025 02:05 |
| Last Modified: | 03 Nov 2025 02:05 |
| URI: | http://eprints.um.edu.my/id/eprint/48603 |
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