Authors : Mohsin J. Jassam, Zena K. Kadhim and Muna S. Kassim
Abstract: In the represents study, analysis numerically in 3-Dimen(SiO2)nal (3D) to study heat transfer characteristics for single tube multi passes cross-flow heat exchanger. The effect of enhanced tubes surface with low integral finned tubes and Silica (SiO2) nanoparticles concentrations with oil (ISO VG-32) as base fluid on the enhancement of heat transfer characteristics and pressure drop. The numerical simulation carried out using of "ANSYS Fluent" package 14.5 to simulate the heat transfer and flow field with oil and nanofluids. Three concentrations of Silica nanoparticles (SiO2) have been investigated 0.3, 0.5, 0.7% Vol with oil for flow rate ranged of 2-5 L/min. The results showed that, using enhanced tube surface with low integral fins lead to a significant increase of heat liberated with maximum enhancement of 71.8% over smooth tube. The low integral fins increase airside heat transfer coefficient (ho) of 21.3% for oil heat exchanger. Also, the results proved that o adding (SiO2) nanoparticle to base fluid (oil) enhance the inner side (hinf) of 6.05% for Silica (SiO2) nanofluids.
Mohsin J. Jassam, Zena K. Kadhim and Muna S. Kassim, 2019. Heat Transfer Enhancement using Natural Nanoparticle of Silica (SiO2). Journal of Engineering and Applied Sciences, 14: 5570-5578.