Experimental study on heat transfer of an engine radiator with TiO_2/EG‑water nano‑coolant

摘要

Nanofluid as a transport medium displays a great potential in engineering applications involving heat transfer. In thispaper, the execution of water and ethylene glycol-based T_iO_2nanofluid as a radiator coolant is resolved experimentally.The convective heat transfer coefficient of T_iO_2/EG-Water nanocoolant has been estimated and contrasted with theinformation acquired experimentally. Nanocoolant were set up by taking 25% ethylene glycol and 75% water with lowvolume concentration of T_iO_2nanoparticles. All the experiments were led for the distinctive volume flow rates in therange going from 30 to 180 L/h (LPH). The nanocoolant made to flow through curved radiator tubes in every experiment,so that it can exchange heat effectively. Result shows that increasing the volume flow rate of nanocoolant flowing in theradiator tubes, increases the heat transfer as well as the convective heat transfer coefficient of nanocooant. Maximumheat transfer enhancement of 29.5% was recorded for nanocoolant with 0.03% nanoparticle concentration as comparedto water at 150 LPH. Apart from this nanoparticle concentration into the base fluid, no further enhancement in heattransfer has been observed at any volume flow rate.