Ahmad Jamekhorshid

Due to the importance of reducing energy consumption, researchers have been continually finding ways to reduce energy consumption. One of these strategies that has been addressed is the use of high high heat transfer fluids. Due to the these an important need, in this study, the effect of adding CuO nanoparticles to base fluid, as well as the effect of increasing the surface due to the presence of rectangular blades, on the heat transfer coefficient, entropy and pressure drop were studied. Pure water was used as the base fluid and nanofluid at three concentrations of 0.5, 0.75 and 1 wt% was produced. An experimental setup was constructed and used. The main part of the experimental setup consists of two rectangular channels, the first channel without blades and the second channel with blades. The channels from above and two sides were insulated, and the bottom of each them were placed under constant heat flux. By six temperature sensors, the wall temperature was measured at 6 different points. Also, two temperature sensors were used to measure the inlet and outlet flow temperature of the channels that directly connected to the fluid. In the other part of this study, the channel analysis was done in Ansys Fluent software. The results showed that by adding nanoparticles to the base fluid, the heat transfer coefficient increased 11% for both channels. Adding rectangular blades to the channel increases the surface area and decreases the thermal boundary layer and improve heat transfer rate 53%. Also, the generated entropy by adding nanoparticles to the base fluid, decreased 14%. Also, due to the reduction of velocity in the channel with the blade, the pressure drop was reduced 30%.