โ Scribed by B. Farajollahi; S.Gh. Etemad; M. Hojjat
No coin nor oath required. For personal study only.
Heat transfer characteristics of c-Al 2 O 3 /water and TiO 2 /water nanofluids were measured in a shell and tube heat exchanger under turbulent flow condition. The effects of Peclet number, volume concentration of suspended nanoparticles, and particle type on the heat characteristics were investigated. Based on the results, adding of naoparticles to the base fluid causes the significant enhancement of heat transfer characteristics. For both nanofluids, two different optimum nanoparticle concentrations exist. Comparison of the heat transfer behavior of two nanofluids indicates that at a certain Peclet number, heat transfer characteristics of TiO 2 /water nanofluid at its optimum nanoparticle concentration are greater than those of c-Al 2 O 3 /water nanofluid while c-Al 2 O 3 /water nanofluid possesses better heat transfer behavior at higher nanoparticle concentrations.
๐ SIMILAR VOLUMES
Measurements were made on the effects of circulating solid particles on the characteristics of fluid flow and heat transfer in the fluidized bed vertical shell and tube type heat exchanger with counterflow. The present work showed that the flow velocity range for collision of particles to the tube w