Experimental Investigation of Subcooled Flow Boiling in an Inclined Channel with a Hot Spot

摘要

In this study, the effects of surface roughness, fluid velocity, and surface inclination on hot spot subcooled flow boiling are investigated experimentally. The experimental set-up consists of a circular heater that is placed on the lower wall of a channel. Based on the experimental data, two new independent empirical correlations are presented. The experimental results show that by increasing the surface roughness and fluid velocity, the surface heat fluxes increase. Inclination of the surface in either direction yields a higher heat transfer coefficient in comparison to its horizontal position when the surface is smooth and lower for the rough surface.