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ISSN Imprimer: 1065-5131
ISSN En ligne: 1563-5074
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EXPERIMENTAL INVESTIGATION OF THERMAL PERFORMANCE OF ETHYLENE GLYCOL-WATER−BASED FE3O4, SIC, AND HYBRID NANOFLUIDS
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RÉSUMÉ
The thermophysical properties of working fluids play a significant role in determining the performance of heat exchangers. These properties can be customized by mixing nanoparticles of different types and different volume concentrations in the working fluid. The effect of three different nanofluids, viz., the suspensions of single-component Fe3O4 and SiC nanoparticles, and the hybrid mixture of Fe3O4 and SiC in a volume ratio of 50:50 (hybrid nanofluid) was experimentally studied using a double pipe heat exchanger. An ethylene glycol and water solution in a volume ratio of 20:80 was considered as the base fluid. The nanofluids were tested at a very low volume concentration of 0.02%−0.08%. The experiments were performed in a turbulent flow regime. The thermophysical properties of the hybrid nanofluid were found to be superior compared to those of its constituent single-component nanoparticle suspension. The hybrid nanofluid exhibited the highest enhancement in the heat transfer coefficient with less pressure drop penalty. A maximum heat transfer enhancement of 98.95% was obtained at a flow rate of 6 l/min for the 0.08% hybrid nanofluid. It was observed that the use of the hybrid nanoparticle mixture with different densities resulted in better thermophysical properties, with a favorable trend in the variation of each of the properties at the volume concentration of the suspension compared to that of its constituent single-component nanoparticle suspension, which led to higher heat transfer enhancement.
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