Experimental investigation on carbon nano tubes coated brass rectangular extended surfaces

Senthilkumar, R.; Prabhu, S.; Cheralathan, M.

doi:10.1016/j.applthermaleng.2012.05.040

Cited by 37 publications

(13 citation statements)

References 19 publications

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“…It can be noticed that the enhancement in thermal performance is of the same order of the increase in heat transfer area (50%). The increase in area is hence much more efficiently exploited by the present solution then in cited papers [14][15][16].…”

Section: Resultsmentioning

confidence: 85%

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Convective Heat Transfer Enhancement for Electronic Device Applications Using Patterned MWCNTs Structures

Shahzad

Giorcelli

Ventola

et al. 2015

Heat Transfer Engineering

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This article reports on the heat transfer characteristics of columnar Vertically Aligned Multiwall Carbon Nanotubes (VA-MWCNTs) grown on a patterned Si surface. In the first part, we describe the procedure for patterning the silicon surface so that the growth of predetermined MWCNTs structures is obtained. The dimensions of CNT structures are in the range of few hundred micrometers while the diameter of single MWCNT was in the range of 30-80 nm. In the second part structures mimicking macroscopic finned heat sinks are used for enhancing forced convective heat transfer on a silicon substrate. Convective heat transfer coefficient has been experimentally measured for silicon substrates with and without MWCNT-based fins on it. The configuration with MWCNTs shows an enhancement in convective heat transfer of 40% and 20%, as maximum and average value respectively, compared to the bare silicon. Experiments have been carried out in a wind tunnel with air as coolant in fully turbulent regime. These encouraging results and the possibility of growing structures directly on silicon can be regarded as a first step towards chip cooling applications based on MWCNT structures.

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Section: Resultsmentioning

confidence: 85%

“…In [15], a MWCNTs coating on a surface is shown to cause an enhancement of 12% using air in natural convective heat transfer regime. In the work of Kordas et al [16] microfins with base length of 50 µm only produces a convective heat transfer enhancement of less than 15%.…”

Section: Introductionmentioning

confidence: 96%

Convective Heat Transfer Enhancement for Electronic Device Applications Using Patterned MWCNTs Structures

Shahzad

Giorcelli

Ventola

et al. 2015

Heat Transfer Engineering

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“…Dietz and Joshi [14] have done a comparative experimental study of the role of heat removal in electronic cooling applications by growing carbon nanotubes (CNT) on the bottom surface of silicon micro-channel. Senthilkumar et al [15] coated CNT on the brass extended surfaces. The heat transfer characteristics were investigated using the Taguchi method for the experimental design.…”

Section: Introductionmentioning

confidence: 99%

Natural-convection heat transfer enhancement of aluminum heat sink using nanocoating by electron beam method

2019

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The high power density and compactness of the next generation electronic devices necessitate efficient and effective cooling methods for heat dissipation in order to maintain the temperature at an acceptable safety level. In the present work, aluminum nanocoating was employed in a heat sink to study the heat transfer performance under natural-convection conditions. The nanocoating was achieved using an electron beam method while the characteristics of nanocoated surfaces were analysed using SEM, an energy dispersive X-ray spectroscopy, surface roughness profilometry equipment and by X-ray diffraction techniques. The heat dissipation from heat sink with and without nanocoating under natural-convection has been experimentally studied at different controllable surrounding temperatures. A uniform increase in the surface roughness by the nanocoating was seen in all cases. The conclusion from several experimental results was that the effect of nanocoating in augmenting the heat transfer is more pronounced only when there is a sufficient temperature driving potential.

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“…In the past years, heat transfer enhancement technology has been developed and widely applied to heat exchanger applications like, refrigeration, automotives, process industry, solar water heater, etc. The usual goals are to reduce the size of a heat exchanger required for a specific heat duty and to upgrade the capacity of existing heat exchange equipment [1][2][3]. The present trend is moving toward components with augmentation, enhancement or intensification.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on thermal performance of nano coated surfaces for air-conditioning applications

Meikandan¹,

Malarmohan²,

Hemachandran³

2017

THERM SCI

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Extended surfaces are frequently used in heat exchanging devices for increasing the heat transfer between a primary surface and the surrounding fluid. Heat transfer augmentation by providing an extended surface to air side, increases weight of the system, obstruct air-flow, increases pressure drop and pumping power to keep the fluid stream flowing. These major problems will be minimized with the help of recent developments in the field of nanotechnology that provides an avenue to augment heat transfer by providing a coating of nanometer thickness on the heat exchanger surface. The present work aims to investigate the effect of the nanocoating on the heat exchanger surface with the experiments. The experimental results show that the presence of nanocoating does not have any effect on drag change, where the actual pressure drop of the coil for air velocity of 0.6 m/s, 1.6 m/s is 20 Pa and 60 Pa, respectively. For nanocoated surface, 24.2% improvement in heat transfer rate was observed and transient temperature response of the nanocoated heat exchanger tube is higher than uncoated one for a given experimental conditions.

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Experimental investigation on carbon nano tubes coated brass rectangular extended surfaces

Cited by 37 publications

References 19 publications

Convective Heat Transfer Enhancement for Electronic Device Applications Using Patterned MWCNTs Structures

Convective Heat Transfer Enhancement for Electronic Device Applications Using Patterned MWCNTs Structures

Natural-convection heat transfer enhancement of aluminum heat sink using nanocoating by electron beam method

Experimental investigation on thermal performance of nano coated surfaces for air-conditioning applications

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