Saturated pool boiling heat transfer of HFE-7100 on sintered copper powder and wire mesh microporous surfaces: A comparison study

Jiang, Yawen; Zhou, Guohui; Zhou, Jifu; Zhou, Feng; Huai, Xiulan

doi:10.1016/j.applthermaleng.2022.119067

Cited by 24 publications

(3 citation statements)

References 37 publications

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“…In the current study, n equals 1.7 for fluids other than water. The surface-fluid combination, C s f , equals 0.0036 based on the experimental data for Novec-7100 [52,53]. As depicted in Figure 11, the boiling results obtained for the plain surface in the present work are almost consistent with the Rohsenow correlation and those obtained for the plain surface in the related studies.…”

Section: Validation Of Experimental Setupsupporting

confidence: 87%

Saturated Boiling Enhancement of Novec-7100 on Microgrooved Surfaces with Groove-Induced Anisotropic Properties

Lin,

Kang,

Cheng

et al. 2024

Applied Sciences

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The effects of the anisotropic properties (wettability and roughness) of microgrooved surfaces on heat transfer were experimentally investigated during pool boiling using Novec-7100 as a working fluid. The idea for introducing the concept of anisotropic wettability in boiling experiments draws inspiration from biphilic surfaces. The investigation is also motivated by two-phase immersion cooling, which involves phase-change heat transfer, using a dielectric liquid as a working fluid. Very few studies have focused on the effects of surfaces with anisotropic properties on boiling performance. Thus, this study aims to examine the pool-boiling heat transfer performance on surfaces with microgroove-induced anisotropic properties under the saturation condition. A femtosecond-laser texturing method was employed to create microgrooved surfaces with different groove spacings. The results indicated that anisotropic properties affected the heat transfer coefficient and critical heat flux. Relative to the plain surface, microgrooved surfaces enhanced the heat transfer performance due to the increased number of bubble nucleation sites and higher bubble detachment frequency. An analysis of bubble dynamics under different surface conditions was conducted with the assistance of high-speed images. The microgrooved surface with a groove spacing of 100 μm maximally increased the BHTC by 37% compared with that of the plain surface. Finally, the CHF results derived from experiments were compared with related empirical correlations. Good agreement was achieved between the results and the prediction correlation.

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Section: Validation Of Experimental Setupsupporting

confidence: 87%

Saturated Boiling Enhancement of Novec-7100 on Microgrooved Surfaces with Groove-Induced Anisotropic Properties

Lin,

Kang,

Cheng

et al. 2024

Applied Sciences

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show abstract

“…In the current study, n equals to 1.7 for fluids other than water. The surface-fluid combination 𝐶 𝑠𝑓 equals to 0.0036 based on the experimental data for Novec-7100 [52,53]. As depicted in Error!…”

Section: Validation Of Experimental Setupmentioning

confidence: 99%

Saturated Boiling Enhancement of Novec-7100 on Microgroove Surfaces with Anisotropic Properties

Lin,

Kang,

Cheng

et al. 2023

Preprint

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The effects of anisotropic properties (wettability and roughness) on microgroove surfaces in pool boiling heat transfer using Novec-7100 as a working fluid were experimentally investigated. The idea of introducing the concept of anisotropic wettability in boiling experiments draws inspiration from biphilic surfaces. The investigation is also motivated by two-phase immersion cooling, which involves phase-change heat transfer by using dielectric liquid as a working fluid. Very few studies have focused on the effects of surfaces with anisotropic properties on boiling performance. Thus, this study aims to examine the pool boiling heat transfer performance on surfaces with microgroove-induced anisotropic properties under the saturation condition. A femtosecond laser–texturing method was employed to create microgroove surfaces with different groove spacing. The results indicated that anisotropic properties affected the heat transfer coefficient and critical heat flux. Relative to the plain surface, microgroove surfaces enhanced the heat transfer performance due to the increased number of bubble nucleation sites and higher bubble detachment frequency. An analysis of bubble dynamics under different surface conditions was conducted with the assistance of high-speed images. The microgroove surface with groove spacing of 100 μm maximally increased the BHTC by 37% compared to the plain surface. Finally, the CHF results derived from experiments were compared with related empirical correlations. Good agreement was achieved between the results and the prediction correlation.

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“…The best performing substrate with the 3-mm unit cell size and 5-mm structure height had an average nucleate boiling heat transfer coefficient of 1.35 W/cm 2 •K, which was 2.81 times that of the plain surface at 0.48 W/cm 2 •K. In the study of Jiang et al (Jiang et al, 2022), two types of microporous coating surfaces, including sintered spherical copper powder and wire mesh microporous surfaces, were fabricated. Results showed that the wire mesh surface demonstrated the best performance which presented an outstanding CHF of 48.95 W/cm 2 with a corresponding HTC of 2.2 W/cm 2 •K, increasing by up to 81.50% and 144.44% compared to the polished copper surface, respectively.…”

Section: Figurementioning

confidence: 99%

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

Zhao,

Wu,

Dang

2023

Front. Energy Res.

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Pool boiling in porous media has been applied in various thermal management systems by using latent heat and increasing the heat transfer area and thermal conduction path to improve the heat transfer performance. In mechanical equipment, vibration is an inevitable problem due to reasons such as engine operation and high-speed relative motion between transmission system components, which causes the system components to be affected by vibration forces or vibration accelerations. This study focuses on a review of published articles about the effects of mechanical vibration on the characteristics of boiling process in porous media by two aspects: heat transfer performance and bubble dynamics. Heat transfer coefficient (HTC) and critical heat flux are two main parameters used to measure the boiling heat transfer characteristics of porous media. For bubble dynamics investigations, properties such as migration, fragment, coalescence, departure diameter and frequency are the focus of research attention. Different mechanical vibration parameters, i.e., direction, frequency, and amplitude, will have different effects on the above characteristics. It is worth mentioning that the greatest influence occurs under resonance conditions, and this has been verified through experimental and simulation calculations. This review highlights the importance of considering mechanical vibrations in the design and optimization of porous media systems for efficient heat transfer applications. Further research is warranted to explore the detailed mechanisms and optimize the vibration parameters for enhanced heat transfer performance in thermal management systems using porous media.

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Saturated pool boiling heat transfer of HFE-7100 on sintered copper powder and wire mesh microporous surfaces: A comparison study

Cited by 24 publications

References 37 publications

Saturated Boiling Enhancement of Novec-7100 on Microgrooved Surfaces with Groove-Induced Anisotropic Properties

Saturated Boiling Enhancement of Novec-7100 on Microgrooved Surfaces with Groove-Induced Anisotropic Properties

Saturated Boiling Enhancement of Novec-7100 on Microgroove Surfaces with Anisotropic Properties

Effect of mechanical vibration on heat and mass transfer performance of pool boiling process in porous media: a literature review

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