Open Access

ARTICLE

FLUID INFLOW AND HEAT TRANSFER ENHANCEMENT: AN EXPERIMENTAL ANALYSIS OF NANOFLUIDS IN MINCHANNEL

Ameer Abed Jaddoa^* , Karema Assi Hamad, Arshad Abdul Jaleil Hameed

Electromechanical Engineering Department, University of Technology, Baghdad, Iraq,00964
* Corresponding Author Email: Ameer.A.Jaddoa@uotechnology.edu.iq

Frontiers in Heat and Mass Transfer 2023, 20, 1-9. https://doi.org/10.5098/hmt.20.18

Abstract

In the Heat Transfer process, many innovations were introduced aiming to obtain the most optimum behavior of the cooling process using nanofluids as coolant liquids. These nanofluids have gained much attention in cooling systems due to their special rheological and thermal performance. In this work, an experimental evaluation is conducted for nanofluids Al₂O₃, SiO₂, CuO, ZnO, and TiO₂ nanoparticles applied to a mini-channel. The nanofluid particles were entirely spread out in purified water (size of 15 nm) before being passed to the heat sink through a confined inflow channel. The obtained results showed that the achieved improvement rates are 25%,20%, 15%, 10% and 5% by using 1-vol% nanoparticles in the distilled water. Also, Al₂O₃ nanoparticles provided an outstanding performance compared to the other types. The reason is imputed to the fact that such an AI₂O₃ has a thermal conductivity greater than the other nanofluids. Besides, the measured pressure of all nanofluid material types declined comparable to the pure water. Additionally, for Al₂O₃, SiO₂, CuO, ZnO, and TiO₂, the recorded pressure was further dropped by 4%, 5%, 6%,7% and 8%, respectively. The additional reduction in pressure was due to an increase in the density of nanofluids. The hypotheses of the conventional heat transfer process do not support the behavior achieved by the small number of nanoparticles of current work. Such a new behavior could be attributed to the generation of stochastic movements of both nanoparticles and micro heat carriers in the pure liquid (water), and it is in charge of enhancing thereof. Finally, despite the complexity of the suggested design, it can be added to existing methods in the literature.

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