ISSN Online: 2688-7231
ISBN Flash Drive: 978-1-56700-497-7
ISBN Online: 978-1-56700-496-0
Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019)
Comparative heat transfer study of MWCNT and CuO water nanofluids with single circular jet impingement on copper plate
The liquid jet impingement method is preferable for the extraction of highly concentrated heat loads in comparatively shorter time periods. However, the use of nanofluid in jet impingement cooling has been proven to augment the heat transfer to a greater extent than conventional fluids. In the present study, a comparison is made between two nanofluids, namely, water based MWCNT and CuO nanofluid for the heat transfer characteristic with free-surface jet impingement. Both the nanofluids are prepared by the two-step method with varying concentrations (φ= 0.017 wt% and 0.010 wt %). The experimental setup consists of a free-surface impinging jet (ID =2.8 mm) impinging on a horizontal copper plate of diameter 90 mm and thickness 3 mm heated to 550°C using a cartridge heaters. The Reynolds number is varied between 4120-7950 by maintaining the nanofluid flow rate with a fixed nozzle to plate distance ratio (H/D =3.5). The effects of flow rate and nanoparticle concentration on heat transfer properties of nanofluids have been studied. This study revealed that the cooling rate of MWCNT nanofluid is found to be maximum when compared with CuO nanofluid (φ=0.017 wt%). In addition to this, enhancement in the peak heat flux observed in case of the MWCNT nanofluid in comparison with CuO nanofluid and water. This enhancement is attributed to the increased thermal conductivity and stability of the nanoparticles in the base fluid.