Heat Transfer Enhancement in Parallel Flow Double Pipe Heat Exchanger using Aluminum Oxide and Copper Oxide Nanofluids

Abstract

This study investigates the effects of Copper oxide (CuO) and aluminum oxide (Al2O3) nanofluids with different diameter sizes and concentrations dissolved in water on a double-pipe heat exchanger (DPHE) behavior numerically. Thereby evaluating the effect of nanofluid's characteristics on heat transfer coefficient, friction factor, Reynolds number and Nusselt number. This objective was accomplished by numerically investigating (through ANSYS) and determining the effect of volume fraction and diameter of nanoparticles on heat transfer and fluid flow via a DPHE. The results showed that under ideal conditions such as 4 vol% and diameter 25 nm, Al2O3 has a better performance by 99.61% than water under 20000 Reynolds number, while CuO performance was 93.52% at the same conditions.