Choice and Justification of the Heat Transfer Intensification Methods

Kuzma-Kichta, Yury A.; Leontiev, A. I.

doi:10.1615/jenhheattransf.v25.i6.20

Cited by 10 publications

(3 citation statements)

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“…As devices in modern technology continue to require increased power capabilities with reduced spatial profiles, it is critical to explore a multitude of methods for enhancing heat transfer (Kuzma-Kichta and Leontiev, 2018). For example, rapid cooling of such devices is a key issue in high-tech industries such as microelectronics and high-end military weapons.…”

Section: Introductionmentioning

confidence: 99%

A Review on Heat Transfer Enhancement With Nanofluids

Guo

2020

J Enh Heat Transf

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Advances in technology miniaturization with increasing power density call for new technologies for enhancing heat transfer. Enhancement of heat transfer with the use of nanofluids has been a hectic topic of research and development since the term "nanofluid" was first used in 1995, mainly because the thermophysical properties of nanofluids in most reports in the literature showed supremacy or improvement over their base fluids, which may not allow fulfillment of the present cutting-edge technology needs. Significant progress in this field has been made in the past two decades. This review summarizes a variety of the experimentally measured thermal properties of common nanofluids, the enhancement mechanisms discovered or hypothesised, the models used for properties and heat transfer characteristics, and the applications of nanofluids for enhancing heat transfer. The model of an artificial neutral network is particularly emphasized. Applications to cooling technology, renewable energy and energy systems, and building technology are detailed. Challenges and areas for future research are identified.

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Section: Introductionmentioning

confidence: 99%

A Review on Heat Transfer Enhancement With Nanofluids

Guo

2020

J Enh Heat Transf

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“…They found that the Carbon nanotube coating over wick surface reduces the substrate superheat when compared with uncoated surface, on account of increased wettability due to coating. Porous coatings on heat transfer surface intensify boiling heat transfer up to fivefold compared to uncoated surface [6,7]. Copper meshes are widely used in heat pipes because of its superior conductivity.…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrophilic coating on mesh wicks used in heat pipes

Sankar

Venkatachalapathy

Kumar

2019

Surface Engineering

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Heat pipes are efficient heat transfer devices which utilize two-phase flow for high heat flux removal and finds applications in many industries. Copper meshes are extensively used in heat pipes and their performance primarily depends on the wettability which is an important design criterion. The wettability and hence the thermal performance can be improved by providing a hydrophilic coating using sol-gel technique. The effect of the binder additive, namely, polyethylene glycolconcentrations, dipping time and dipping frequency on wettability and thermal performance are investigated in this study. It is found that coating on mesh reduces the contact angle and the wettability is improved by 32%. The results indicate that dipping frequency has significant effects on thermal performance due to the existence of hair-like microstructures. The coating is found to offer good thermal performance and reduces the surface temperature of heat pipe by 23 K at 180 W.

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“…These studies showed that the addition of a highly thermally conductive porous skeleton is an effective passive method for improving the heat exchange performance of paraffin wax. However as an active method, ultrasound is effective in improving the natural convective heat transfer performance (Kuzma-Kichta and Leontiev, 2018). Wong (1969) used the hot-wire method to study the influence mechanism of ultrasound on the natural convective heat transfer of water and methanol.…”

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confidence: 99%

Enhancement of Gallium Phase-Change Heat Transfer by Copper Foam and Ultrasonic Vibration

Niu

et al. 2020

J Enh Heat Transf

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In this study, the effects of copper foam and ultrasonic vibration on the melting process of lowmelting gallium in a rectangular vessel were experimentally investigated. The effective thermal conductivity, heating wall temperature, most melting duration, and total melting duration during the gallium's melting process were examined for various heating powers. We found that a portion of the gallium remained solid in the corners of the vessel in the late melting stage, and melting the remaining solid portion accounted for approximately 28% of the total melting duration of the pure gallium. In our test, the corresponding heating wall temperature rose significantly during this stage, which reduced the usable volume of the vessel. However, by the addition of copper foam and ultrasonic waves the remaining solid portion was greatly reduced, and the heating wall temperature was controlled. The total melting time for the gallium with added copper foam and ultrasonic waves was reduced by 10% and 17%, respectively, below that for the pure gallium melting process. When heat was added using ultrasonic waves for a long period of the melting process, the temperature of the heating surface was consistently lower than a pure gallium heat regenerator without ultrasonic waves. This would enhance the value of workable condition power for devices.

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Choice and Justification of the Heat Transfer Intensification Methods

Cited by 10 publications

References 0 publications

A Review on Heat Transfer Enhancement With Nanofluids

A Review on Heat Transfer Enhancement With Nanofluids

Effect of hydrophilic coating on mesh wicks used in heat pipes

Enhancement of Gallium Phase-Change Heat Transfer by Copper Foam and Ultrasonic Vibration

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