Energy and exergy analyses to enhance the performance of coiled-tube heat exchanger by employing water/Al₂O₃ nanofluid
by Esam I. Jassim
International Journal of Exergy (IJEX), Vol. 41, No. 3, 2023

Abstract: The purpose of this research is to experimentally evaluate the degree of enhancement in the heat transfer and entropy generation when nanoparticles mix with ordinary water. Several concentrations of Al₂O₃ nanoparticles at various flowrates are investigated to assess the enhancement in the exchanger's (NTU) and efficiency. Results illustrate that the heat exchanger performance enhances up to 27% due to presence of nanoparticles and is supplemented with the increase of the volume fraction as well as the nanofluid flowrate. Numerically speaking, the total irreversibility decreases by 47% at volume concentration of 0.5% although the frictional source augments by 27%.

Online publication date: Tue, 04-Jul-2023

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