Effect of Surface Hydration and Interfusion of Suspended Silica Nanoparticles on Heat Transfer

摘要

Experimental results of silica nanofluids consisting of 10nm or 20nm silica particles have been performed. Particle size, zeta potential and the CHF values under different volume concentrations are provided, and agglomeration structures are seen to affect the critical heat flux of NiChrome wire immersed in a pool of water. The critical heat flux (CHF) of the wire does not increase monotonically with concentration. CHF decreases when particle concentration is increased depending on the particle shape and the hydroxylated surface of the nanoparticles.