Flow boiling heat transfer with HFC mixtures in a smooth horizontal tube. Part I: Experimental investigations

Flow boiling of ethanol/water binary mixture in a square mini-channel

“…Moreover, the latent heat of vaporisation and fluid viscosity are indicated to have a significant role in microscale flow boiling, according to Peng et al [6] who suggest that liquids with higher liquid to vapour density ratio, greater thermal diffusion coefficients and larger latent heats require higher heat flux for the initiation of nucleation. After the onset of nucleation, liquids that have lower surface tension and lower latent heat of vaporisation contribute to higher heat transfer coefficients, as stated by Greco and Vanoli [7].…”

“…As reported by various studies [1][2][3][4][5][6][7], several factors have been found to affect the heat transfer of micro-cooling systems and enhanced heat transfer rates can be achieved by varying these factors. The main factors recognised are: the hydraulic diameter of the channels used [1,2], their surface roughness [3], their geometry [4], as well as the mass flux and the heat flux applied to the system.…”

Review of two-phase flow and flow boiling of mixtures in small and mini channels

“…They proposed a modified two-phase friction factor correlation based on their experimental data. Greco and Vanoli (2005a) studied experimentally flow boiling with HFC mixtures in a smooth horizontal tube (6 mm ID and 6 m length stainless tube). The local heat transfer coefficients of HFC mixtures R410a and R404a were measured.…”

Investigation on Boiling Heat Transfer Characteristics of R404A in a 7.49-mm Smooth Horizontal Tube

“…Greco and Vanoli [13] demonstrated the influence of pressure on the heat transfer coefficient using R410A and R404A for annular and intermittent patterns. They showed that when experiments are conducted with an AF pattern, the effect of increasing the pressure for a constant mass flux and heat flux resulted in a big difference in the heat transfer coefficient in the nucleate boiling regime (low vapor qualities).…”