Paper Key : IRJ************019
Author: Masoud Hatamigarousi,Peyman Norouzi,Latifeh Arazipoor,Narges Fathali
Date Published: 03 Jan 2025
Abstract
This paper evaluates the heat transfer and flow dynamics of aluminum oxide (AlO)-water nanofluids within a plain fin heat exchanger, focusing on nanoparticle volume fractions ranging from 0% to 0.8%. The analysis demonstrates that the Nusselt number increases significantly with both nanoparticle concentration and Reynolds number. Specifically, at a Reynolds number of 314, the Nusselt number for a nanofluid with 0.8% volume fraction is 24% higher than that of the base fluid, while at a Reynolds number of 2130, this enhancement decreases to 18%, indicating a diminishing relative benefit at higher turbulence levels. Concurrently, the friction factor exhibits a consistent 46% increase across both low and high Reynolds numbers for the 0.8% volume fraction. Despite the rise in flow resistance, the overall performance evaluation metric (JF-factor) improves substantially, showing a 30% enhancement at low Reynolds numbers and a 36% improvement at high Reynolds numbers. These findings highlight the thermohydraulic advantages of nanofluids, providing a pathway for the development of more energy-efficient thermal systems.
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