Augmentation of Pool Boiling Heat Transfer Using the Laser Treatment Technology

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27230%2F24%3A10258877" target="_blank" >RIV/61989100:27230/24:10258877 - isvavai.cz</a>

Výsledek na webu

<a href="https://ros.edu.pl/index.php?id=1324&lang=en" target="_blank" >https://ros.edu.pl/index.php?id=1324&lang=en</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.54740/ros.2024.017" target="_blank" >10.54740/ros.2024.017</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Augmentation of Pool Boiling Heat Transfer Using the Laser Treatment Technology

Popis výsledku v původním jazyce

The paper discusses applying the laser technique to modify the copper heater surface. The interaction of the laser beam with the base material leads to its melting, and various shapes can be obtained during the process. The study is focused on the boiling heat transfer analyses of the specimen in the form of a disc with longitudinal microfins of a height of 0.5 mm. The optical microscope was used to determine the morphology of the surface. The laser beam generated significant roughness, which benefitted the overall thermal performance. Considerable heat transfer augmentation was recorded for the laser-made surface in relation to the untreated sample, which served as a reference. The heat flux was several times higher, while the laser-treated sample&apos;s boiling curves were shifted to the area of smaller temperature differences. Two boiling models proved unsuccessful in predicting the heat exchange process occurring during pool boiling of distilled water and ethyl alcohol. According to the Smirnov, Xin and Chao models, the average differences between the experimental data and calculation results were ca. 93 kW/m 2 and 116 kW/m 2 for water, 78 kW/m 2 and 68 kW/m 2 for ethanol.

Název v anglickém jazyce

Augmentation of Pool Boiling Heat Transfer Using the Laser Treatment Technology

Popis výsledku anglicky

The paper discusses applying the laser technique to modify the copper heater surface. The interaction of the laser beam with the base material leads to its melting, and various shapes can be obtained during the process. The study is focused on the boiling heat transfer analyses of the specimen in the form of a disc with longitudinal microfins of a height of 0.5 mm. The optical microscope was used to determine the morphology of the surface. The laser beam generated significant roughness, which benefitted the overall thermal performance. Considerable heat transfer augmentation was recorded for the laser-made surface in relation to the untreated sample, which served as a reference. The heat flux was several times higher, while the laser-treated sample&apos;s boiling curves were shifted to the area of smaller temperature differences. Two boiling models proved unsuccessful in predicting the heat exchange process occurring during pool boiling of distilled water and ethyl alcohol. According to the Smirnov, Xin and Chao models, the average differences between the experimental data and calculation results were ca. 93 kW/m 2 and 116 kW/m 2 for water, 78 kW/m 2 and 68 kW/m 2 for ethanol.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10500 - Earth and related environmental sciences

Projekt

—

Návaznosti

O - Projekt operacniho programu

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Rocznik Ochrony Środowiska

ISSN

1506-218X

e-ISSN

—

Svazek periodika

26

Číslo periodika v rámci svazku

_

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

8

Strana od-do

160-167

Kód UT WoS článku

001228077000001

EID výsledku v databázi Scopus

—