Abstract
Al2O3 and TiO2 water based nanofluids were used in heat exchangers to enhance the nusselt number. Tests were performed at different flow rates ranging between 2 LPM and 4 LPM. Concentrations of nanoparticles were taken from 0.1% to 0.3% by volume. Shell & tube heat exchangers having 14 tubes and Double pipe heat exchanger were used. The enhancement in Nusselt number and Reynolds number for Al2O3 and TiO2 nanofluids and heat exchangers were determined and compared. It was found that the increment of Nusselt number was more for Al2O3 nanofluid as compared to TiO2 nanofluid for both heat exchangers.
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