IR Measurements of Heat Transfer Coefficients and Nucleation Parameters during Saturated Nucleate Boiling of Water–Glycerin Mixtures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F22%3A00356334" target="_blank" >RIV/68407700:21220/22:00356334 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.csite.2022.101917" target="_blank" >https://doi.org/10.1016/j.csite.2022.101917</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.csite.2022.101917" target="_blank" >10.1016/j.csite.2022.101917</a>

Jazyk výsledku

angličtina

Název v původním jazyce

IR Measurements of Heat Transfer Coefficients and Nucleation Parameters during Saturated Nucleate Boiling of Water–Glycerin Mixtures

Popis výsledku v původním jazyce

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/m2. 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.

Název v anglickém jazyce

IR Measurements of Heat Transfer Coefficients and Nucleation Parameters during Saturated Nucleate Boiling of Water–Glycerin Mixtures

Popis výsledku anglicky

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/m2. 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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20303 - Thermodynamics

Projekt

<a href="/cs/project/EF16_019%2F0000753" target="_blank" >EF16_019/0000753: Centrum výzkumu nízkouhlíkových energetických technologií</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Case Studies in Thermal Engineering

ISSN

2214-157X

e-ISSN

2214-157X

Svazek periodika

32

Číslo periodika v rámci svazku

April

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

—

Kód UT WoS článku

000792985700006

EID výsledku v databázi Scopus

2-s2.0-85126972725