CFD analysis for different nanofluids in fin prolonged heat exchanger for waste heat recovery

Abstract

Heat exchangers play a critical role in waste heat recovery systems by enabling the transfer of heat from high-temperature waste streams to other fluids, thus improving overall energy efficiency and reducing emissions. The present study focuses on the performance analysis of fin prolonged heat exchanger with the application of different nanofluids. The results suggest that the incorporation of graphene oxide (GO) and Al2O3 nanoparticles to the base fluid can enhance the heat transfer performance, with GO-based nanofluids exhibiting better results than Al2O3-based nanofluids. The incorporation of nanoparticles to a base fluid increases the pressure drop, and GO/water nanofluid exhibits less pressure drop than Al2O3/water nanofluid due to the higher aspect ratio, larger surface area, and more efficient alignment of GO nanoparticles in the fluid flow. It is concluded that enhancement in heat transfer is more impressive for GO-water working fluid. The fluctuation in pressure drop is noted for Al2O3 nanoparticles. The heat transfer phenomenon effected with higher aspect ratio and surface area.

Keywords

• Heat transfer
• Waste heat recovery
• Heat exchangers
• Nanofluids
• CFD analysis