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Investigation of nucleate pool boiling of saturated pure liquids and ethanol-water mixtures on smooth and laser-textured surfaces
ID Zakšek, Peter (Avtor), ID Zupančič, Matevž (Avtor), ID Gregorčič, Peter (Avtor), ID Golobič, Iztok (Avtor)

URLURL - Izvorni URL, za dostop obiščite https://www.tandfonline.com/doi/suppl/10.1080/15567265.2019.1689590?scroll=top Povezava se odpre v novem oknu
Opis: Priloga samo k elektronski verziji
URLURL - Izvorni URL, za dostop obiščite https://www.tandfonline.com/doi/full/10.1080/15567265.2019.1689590 Povezava se odpre v novem oknu

Izvleček
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.

Jezik:Angleški jezik
Ključne besede:pool boiling, water, ethanol, binary mixtures, laser surface engineering, laser texturing, capillary length
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Status publikacije:Objavljeno
Različica publikacije:Recenzirani rokopis
Leto izida:2020
Št. strani:Str. 29-42
Številčenje:Vol. 24, iss. 1
PID:20.500.12556/RUL-114827 Povezava se odpre v novem oknu
UDK:66.02(045)
ISSN pri članku:1556-7265
DOI:10.1080/15567265.2019.1689590 Povezava se odpre v novem oknu
COBISS.SI-ID:16891675 Povezava se odpre v novem oknu
Datum objave v RUL:16.03.2020
Število ogledov:1567
Število prenosov:294
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
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Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:vrenje v bazenu, voda, etanol, binarne zmesi, laserski inženiring površin, lasersko strukturiranje, kapilarna dolžina

Projekti

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0223
Naslov:Prenos toplote in snovi

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:P2-0392
Naslov:Optodinamika

Financer:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:J2-1741
Naslov:Lasersko mikro in nanostrukturiranje za razvoj biomimetičnih kovinskih površin z edinstvenimi lastnostmi (LaMiNaS)

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