Akademik Veri Yönetim Sistemi
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING, cilt.47, sa.12, ss.15415-15428, 2022 (SCI-Expanded)
The flow and heat transfer characteristics of TiO2-water nanofluid in an offset strip fin channel in the refrigerant part of the heavy vehicle radiator are investigated under three-dimensional, steady state, single-phase, and laminar flow conditions. Investigated parameters are the volume concentration (0.1-4%) and Reynolds number (300-800). The results are evaluated in terms of heat transfer rate ratio, heat transfer coefficient ratio, Nusselt number ratio, pressure drop ratio, pumping power ratio, performance evaluation criteria, and exergy loss. The effectiveness value is also calculated for the whole radiator. The results show that using TiO2-water nanofluid at low concentrations in the entire Reynolds number range does not have significant effect compared to pure water. Heat transfer rate, heat transfer coefficient, Nusselt number, pressure drop and pumping power increase with increase in Reynolds number, and volume concentration of the nanofluid. It is seen that the use of TiO2-water nanofluid at high concentrations is advantageous compared to performance evaluation criteria. The performance evaluation criteria value increases 7.2 and 13% for the Reynolds number 300 and 800, respectively, when volume concentration increases from 0 to 4%. Remarkable increment is seen for the pumping power due to the increase of viscosity by adding nanoparticles. Additionally, the exergy loss and effectiveness are examined. It is observed that the exergy loss and effectiveness changed in direct proportion to the Reynolds number and the concentration. Applying convection boundary condition to the top and bottom plates and using aluminum alloy 3003-H14 as the material of solid parts are the originalities of this study.