Study of Heat Transfer and Exergy Analysis in Double-tubed Heat Exchangers Equipped with Turbulenter Using Nanofluid TiO2

In this study, the effect of water-based titanium oxide nanofluid on total heat transfer coefficient heat transfer rate, mean heat transfer, pressure drop and entropy generation for double tubed heat exchanger equipped with snake tubes has been investigated. Our results reveal that with the use of nanofluid, the heat transfer coefficient is increased about 18.10 to 18.22 percent and this will also lead to an increase in heat transfer rate. The entropy generation has been increased about 24 percent compared to water-based fluid. In addition, using both nanofluid with particle volume fraction of 0.3 percent and snake tube as a flow turbulent simultaneously results in 24.3 and 38 percent increase in effective heat transfer. Therefore, the efficiency of heat exchanger is increased.