Peter Zakšek (Avtor), Matevž Zupančič (Avtor), Peter Gregorčič (Avtor), Iztok Golobič (Avtor)

Povzetek

Nucleate pool boiling experiments were performed on plain and five laser-textured stainless-steel foils using saturated pure water, 100% ethanol, 0.4% and 4.2% mole fraction ethanol-water mixtures. All laser-textured samples contained untreated, smooth 0.5 mm wide regions and intermediate textured surfaces, that differ in the width of the laser patterned regions (from 0.5 mm to 2.5 mm). For smooth surfaces, we measured significant decreases in average heat transfer coefficients (HTC) and increases in bubble activation temperatures in comparison with the laser-textured surfaces for all the tested working fluids. Significant enhancement in HTC (280%) on a textured heating surface with 2.5-mm-wide laser pattern was recorded using pure water. For pure ethanol, the highest enhancement of 268% was achieved on a heating surface with 1.5-mm-wide laser pattern. The highest enhancement of HTC for the tested binary mixtures was obtained using 2.0-mm wide-laser-textured regions (HTC improved by 235% and 279% for the 0.4% and 4.2% mixtures, respectively). Our results indicate that laser texturing can significantly improve boiling performance when the intervals of the laser-textured patterns are close to the capillary lengths of the tested fluids.

Ključne besede

pool boiling;water;ethanol;binary mixtures;laser surface engineering;laser texturing;capillary length;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 66.02(045)
COBISS: 16891675 Povezava se bo odprla v novem oknu
ISSN: 1556-7265
Št. ogledov: 628
Št. prenosov: 259
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: vrenje v bazenu;voda;etanol;binarne zmesi;laserski inženiring površin;lasersko strukturiranje;kapilarna dolžina;
Vrsta dela (COBISS): Članek v reviji
Konec prepovedi (OpenAIRE): 2021-03-16
Strani: str. 29-42
Letnik: ǂVol. ǂ24
Zvezek: ǂiss. ǂ1
Čas izdaje: 2020
DOI: 10.1080/15567265.2019.1689590
ID: 11442078