TY - JOUR

T1 - Pool boiling performance on the textured hemi-wicking surfaces fabricated by nanosecond laser ablation

AU - Serdyukov, Vladimir

AU - Vladyko, Ilya

AU - Starinskiy, Sergey

AU - Rodionov, Alexey

AU - Shukhov, Yuri

AU - Malakhov, Ivan

AU - Safonov, Alexey

AU - Surtaev, Anton

N1 - The work was supported by the Russian Science Foundation (Grant No. 18–79–10119). The authors are grateful to Veronica Sulyaeva (Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk) and Vladislav Shikalov (Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk) for the help with SEM and profilometry measurements. Публикация для корректировки.

PY - 2023/6/25

Y1 - 2023/6/25

N2 - Today the problem of the boiling improvement is directly related to the heating surface modification at the micro- and nanoscale. As was shown by different authors the hemi-wicking surfaces demonstrate extremely high enhancement of heat transfer (HTC) and critical heat flux density (CHF) during boiling. In this paper, the laser ablation technique was used to fabricate textured hemi-wicking silicon surfaces. This surface modification technique is one of the most promising and discussed techniques today due to its high accuracy, implementation ease and high stability of the fabricated surfaces. The effect of the laser type on the silicon surface properties and boiling improvement was studied in detail. The texturing was performed using lasers with different wavelength - infrared (1064 nm) and visible (532 nm), but with the same number of pulses per unit area and laser spot diameter. The experiments showed that the water pool boiling performance differs significantly depending on the type of laser treatment. In particular, while the usage of infrared laser results in the HTC enhancement up to 78% compared to the untreated surface, the visible laser-textured surface in contrast shows the deterioration of the heat transfer rate up to 40%. At the same time, the visible laser-textured surface demonstrates the maximum CHF value of 1806 kW/m2, which is more than 2 times higher than for the untreated surface. The comparison with the models showed, that such an enhancement is explained by the highest capillary wicking of this surface. Based on the analysis of departure diameters, nucleation frequencies and the conditions for the vapor bubbles formation the observed difference in the heat transfer rate during boiling was revealed. Also using the high-speed thermography the dynamics of reversible and irreversible dry spots was studied during boiling on laser-textured hemi-wicking surfaces for the first time.

AB - Today the problem of the boiling improvement is directly related to the heating surface modification at the micro- and nanoscale. As was shown by different authors the hemi-wicking surfaces demonstrate extremely high enhancement of heat transfer (HTC) and critical heat flux density (CHF) during boiling. In this paper, the laser ablation technique was used to fabricate textured hemi-wicking silicon surfaces. This surface modification technique is one of the most promising and discussed techniques today due to its high accuracy, implementation ease and high stability of the fabricated surfaces. The effect of the laser type on the silicon surface properties and boiling improvement was studied in detail. The texturing was performed using lasers with different wavelength - infrared (1064 nm) and visible (532 nm), but with the same number of pulses per unit area and laser spot diameter. The experiments showed that the water pool boiling performance differs significantly depending on the type of laser treatment. In particular, while the usage of infrared laser results in the HTC enhancement up to 78% compared to the untreated surface, the visible laser-textured surface in contrast shows the deterioration of the heat transfer rate up to 40%. At the same time, the visible laser-textured surface demonstrates the maximum CHF value of 1806 kW/m2, which is more than 2 times higher than for the untreated surface. The comparison with the models showed, that such an enhancement is explained by the highest capillary wicking of this surface. Based on the analysis of departure diameters, nucleation frequencies and the conditions for the vapor bubbles formation the observed difference in the heat transfer rate during boiling was revealed. Also using the high-speed thermography the dynamics of reversible and irreversible dry spots was studied during boiling on laser-textured hemi-wicking surfaces for the first time.

KW - Boiling

KW - Boiling improvement

KW - Critical heat flux

KW - Dryout dynamics

KW - Laser texturing

KW - Wickability

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85153192430&origin=inward&txGid=237849ea8655d1af9e78938ea6ccaefd

UR - https://www.mendeley.com/catalogue/1512536c-740f-30be-afd1-11823815de3d/

U2 - 10.1016/j.applthermaleng.2023.120472

DO - 10.1016/j.applthermaleng.2023.120472

M3 - Article

VL - 228

JO - Applied Thermal Engineering

JF - Applied Thermal Engineering

SN - 1359-4311

M1 - 120472

ER -