Effect on Quenching Performance of SiC/water Nanofluids in a Long Vertical Tube

Abstract

Experiments were conducted to investigate the effect of nanofluids on reflood heat transfer in a long vertical tube. The nanofluids, which are produced by dispersing nano-sized particles in traditional base fluids such as water, ethylene glycol, and engine oil, are expected to have a reasonable potential to enhance a heat transfer. 0.01 volume fraction (%) SiC/water nanofluid was prepared by two-step method. Transmission electron microscopy (TEM) images are acquired to characterize the shape and size of SiC nanoparticles. The dispersion behavior of nanofluids was investigated with zeta potential values. And then, the reflood tests have been performed using water and nanofluids. We have observed a more enhanced cooling performance in the case of the nanofluid reflood. The enhancing cause of the cooling performance after the quenching experiments using nanofuid were investigated through the macroscopic observation, scanning electron microscopy (SEM), contact angles and SEM-energy dispersive X-ray spectroscopy (EDS) of the inner surface of the test section.