Review of phase change heat transfer enhancement by metal foam

Shi, Juan; Du, Haiyi; Chen, Zhenqian; Lei, Shuyao

doi:10.1016/j.applthermaleng.2022.119427

Cited by 44 publications

(7 citation statements)

References 172 publications

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“…Foam metal material with large surface area and good thermal conductivity is an ideal material to enhance heat transfer. Currently, heat transfer enhancement using foam metal mainly concentrates on boiling and single-phase convection heat transfer [1][2][3]. The research on CHT in foam metal is comparatively few.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on enhancement condensation heat transfer in tube by foam metal in presence of non-condensable gas

2024

J. Phys.: Conf. Ser.

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Condensation heat transfer in tube is widely applied in industrial production, and the heat transfer process is often weakened by non-condensable gas (NCG) in actual production. Enhancing condensation heat transfer is beneficial to improve production efficiency, which has always been a hot topic in current research. Foam metal material with large specific surface area and good thermal conductivity is an ideal material to enhance heat transfer. In order to study enhancement heat transfer effect and optimize structure of foam metal, this paper investigated condensation heat transfer in tube strengthened by foam metal in presence of NCG experimentally. Section shape of foam metal is annular, and the pores per inch (PPI) of foam metals is 10, 15, 20 respectively. The effects of PPI value, steam/air mixture mass flow, and NCG mass fraction on heat transfer coefficient (HTC) and flow resistance are studied. The results reveal the following: (1) Compared with smooth tube, the foam metal enhances heat transfer significantly, and HTC increases by 1.5-2.3 times. (2) At same steam/air mixture mass flow, 10PPI foam metal tube has the highest HTC compared to others. (3) With increase of NCG mass fraction and PPI value, pressure drop increases and the HTC decreases. Based on experimental data, pressure drop and HTC correlations are developed. This paper provides an important technical basis for foam metal material application in enhancement heat transfer area.

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Section: Introductionmentioning

confidence: 99%

Experimental study on enhancement condensation heat transfer in tube by foam metal in presence of non-condensable gas

2024

J. Phys.: Conf. Ser.

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“…Porous materials have been used as lters, absorbents, catalysts, heat exchangers, and pumps owing to their unique properties such as a large surface area, large pore volume, hierarchical porosity, and low density. [1][2][3][4] The characteristics of porous materials have been investigated by imaging techniques such as X-ray computed tomography (CT), energy dispersive Xray spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), mercury porosimetry, and optical microscopes. [5][6][7] These techniques reveal the structures (pore size and tortuosity factor) and elemental maps of porous materials.…”

Section: Introductionmentioning

confidence: 99%

Nano-particle motion in a monolithic silica column using the single-particle tracking method

Abe,

Tomioka,

Matsuda

2024

Nanoscale Adv.

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“…To date, utilizing single-scale structured surfaces alone has proven inadequate in addressing the Leidenfrost effect at high temperatures. Open-cell metal foams with ultrahigh porosity have been identified as one of the most promising materials for enhancing phase change heat transfer, owing to their high thermal conductivity and large specific surface area. − Furthermore, the skeleton structure provides natural and interconnected pathways for vapor evacuation, while the microcavities prevent droplet levitation through strong capillary wicking. Consequently, metal foams with composite functions are expected to overcome the limitations of known single-scale structured surfaces.…”

Section: Introductionmentioning

confidence: 99%

Inhibiting the Leidenfrost Effect by Superhydrophilic Nickel Foams with Ultrafast Droplet Permeation

Wang

et al. 2023

ACS Appl. Mater. Interfaces

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Inhibiting the Leidenfrost effect has drawn extensive attention due to its detrimental impact on heat dissipation in high-temperature industrial applications. Although hierarchical structures have improved the Leidenfrost point to over 1000 °C, the current performance of single-scale structures remains inadequate. Herein, we present a facile high-temperature treatment method to fabricate superhydrophilic nickel foams that demonstrate ultrafast droplet permeation within tens of milliseconds, elevating the Leidenfrost point above 500 °C. Theoretical analysis based on the pressure balance suggests that these remarkable features arise from the superhydrophilic property, high porosity, and large pore diameter of nickel foams that promote capillary wicking and vapor evacuation. Compared to solid nickel surfaces with a Leidenfrost temperature of approximately 235 °C, nickel foams nucleate boiling at high superheat, triggering an order of magnitude higher heat flux. The effects of the pore diameter and surface temperature on droplet permeation behaviors and heat transfer characteristics are also elucidated. The results indicate that droplet permeation is dominated by inertial and capillary forces at low and high superheat, respectively, and moderate pore diameters are more conducive to facilitating droplet permeation. Furthermore, our heat transfer model reveals that pore diameter plays a negligible role in the heat flux at high surface temperatures due to the trade-off between effective thermal conductivity and specific surface area. This work provides a new strategy to address the Leidenfrost effect by metal foams, which may promise great potential in steel forging and nuclear reactor safety.

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Review of phase change heat transfer enhancement by metal foam

Cited by 44 publications

References 172 publications

Experimental study on enhancement condensation heat transfer in tube by foam metal in presence of non-condensable gas

Experimental study on enhancement condensation heat transfer in tube by foam metal in presence of non-condensable gas

Nano-particle motion in a monolithic silica column using the single-particle tracking method

Inhibiting the Leidenfrost Effect by Superhydrophilic Nickel Foams with Ultrafast Droplet Permeation

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