20.500.12556/RUL-135431 IR measurements of heat transfer coefficients and nucleation parameters during saturated nucleate boiling of water–glycerin mixtures Heat transfer coefficients and nucleation parameters were experimentally measured during saturated nucleate boiling of water–glycerin mixtures on a thin smooth titanium foil. Infrared thermometry was employed to study boiling of water–glycerin mixtures at atmospheric pressure in water mass fraction range from 100 % down to 60 % and heat flux range from 0 to 200 kW m−2. Heat transfer coefficients were found to deteriorate with an increase of concentration of glycerin in the boiling mixture. The deterioration was more pronounced for mixtures with lower water mass fraction and for higher heat fluxes. Bubble departure diameters were observed to be weakly dependent on heat flux and independent of composition of the boiling mixture. Nucleation frequencies were found to increase with heat flux and to be inversely proportional to water mass fraction of the boiling mixture. Thermal energy transferred during nucleation of individual bubbles was independent of both heat flux and mixture composition. Values and trends of evaluated parameters suggest that for investigated mixtures and boiling conditions, heat transfer into the liquid phase is more important relative to the transport of latent heat by nucleating bubbles. nucleate boiling pool boiling heat transfer coefficient water–glycerin mixtures bubble departure diameter nucleation frequency bubble growth rate infrared thermometry titanium foil mehurčkasto vrenje vrenje v bazenu koeficient toplotne prestopnosti zmes voda-glicerin premer mehurčka frekvenca nukleacije rast mehurčka infrardeča termografija titanova folija true false true Angleški jezik Slovenski jezik Članek v reviji 2022-03-14 14:05:46 2022-03-14 14:05:51 2023-11-29 09:20:57 0000-00-00 00:00:00 2022 0 0 13 str. Vol. 32, art. 101917 Apr. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.3/.4:66.02 2214-157X 10.1016/j.csite.2022.101917 100823555 RAZ_Vajc_Viktor_2022.pdf RAZ_Vajc_Viktor_2022.pdf 1 51C9D8E1264F598DBB3924478D762B11 4bcc6774449bd6e937f625c731491dc7a5ff88978907c1f108cfc43068d86f5f 1c759bbf-a399-11ec-8556-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154502 https://www.sciencedirect.com/science/article/pii/S2214157X22001630 1 79152e95-a397-11ec-8556-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154501 Fakulteta za strojništvo 0 0 0