THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

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Emre Askin Elibol

,

Oguz Turgut

THERMAL-HYDRAULIC PERFORMANCE OF TIO2-WATER NANOFLUIDS IN AN OFFSET STRIP FIN HEAT EXCHANGER

ABSTRACT
The flow and heat transfer characteristics of the TiO2-water nanofluid assuming as a single-phase in the rectangular offset strip fin structure for different Reynolds number (500-1000) and TiO2 nanoparticle volume concentration values (0-4%) were investigated numerically under 3-D, steady-state, and laminar flow conditions. Simulations were also performed for 1% and 4% nanoparticle volume concentrations of Al2O3-water nanofluid, and the results were compared with those of TiO2-water nanofluid. Results show that when the TiO2-water nanofluid is used, the heat transfer rate, heat transfer coefficient, and Nusselt number increase with increasing both Reynolds number and nanoparticle volume concentration, and parallel to these, both pressure loss, and pumping power increase. Considering the values of the performance evaluation criteria number, it is clear that the use of TiO2-water nanofluid in offset strip fin structure at all Reynolds numbers examined between 1-4% volume concentration values is quite advantageous. It is observed that TiO2-water nanofluid is much superior to Al2O3-water considering the performance evaluation criteria number. When the Reynolds number is 1000 and the volume concentration value of the TiO2 nanoparticle is 4%, the performance evaluation criteria number value is found to be 1.19, that is, there is a 19% increase compared to water. It is considered that the results of this study can be used as important data on the design of automobile radiators, air-conditioning, and defense.
KEYWORDS
Plate-fin heat exchanger, offset strip fin, nanofluid, heat transfer, pressure drop
PAPER SUBMITTED: 2020-10-19
PAPER REVISED: 2020-12-08
PAPER ACCEPTED: 2020-12-21
PUBLISHED ONLINE: 2021-02-06
DOI REFERENCE: https://doi.org/10.2298/TSCI201019063E
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 1, PAGES [553 - 565]
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Thermal-hydraulic performance of TiO2-water nanofluids in an offset strip fin heat exchanger

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence