Single nozzle spray cooling heat transfer mechanisms

Horáček, B. Milan; Kiger, Ken; Kim, Jungho

doi:10.1016/j.ijheatmasstransfer.2004.10.026

Cited by 223 publications

(94 citation statements)

References 13 publications

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“…A review of the spray cooling phenomena as of 2007 is provided in reference [12]. Horacek et al [13] found that heat flux dissipated from a spray-cooled surface can be correlated to the three-phase contact line length density, and not to the total wetted area. The CHF was reached at the highest contact line density.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Heat Transfer with Pool and Spray Impingement Boiling on Microporous and Nanowire Surface Coatings

Thiagarajan¹,

Wang²,

Yang³

et al. 2010

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The National Renewable Energy Laboratory (NREL) is leading a national effort to develop next-generation cooling technologies for hybrid vehicle electronics, as part of the Advanced Power Electronics and Electrical Machines program area in the U.S. Department of Energy's (DOE's) Vehicle Technologies Program. The overarching goal is to reduce the size, weight, and cost of power electronic modules that convert direct current from the batteries to alternating current for the motor, and vice versa. Aggressive thermal management techniques help in achieving the goals of increased power density and reduced weight and volume, while keeping the chip temperatures within acceptable limits. The viability of aggressive cooling schemes such as spray and jet impingement in conjunction with enhanced surfaces is being explored as part of the program. In this work, we present results from a series of experiments with pool and spray boiling on enhanced surfaces, such as a microporous layer of copper and copper nanowires, using HFE-7100 as the working fluid. Spray impingement on the microporous coated surface showed an enhancement of 100%−300% in the heat transfer coefficient at a given wall superheat with respect to spray impingement on a plain surface under similar operating conditions. The critical heat flux also increased by 7%−20%, depending on the flow rates. Heat transfer coefficients obtained on the nanowire-grown surface are considerably better than those obtained on the plain surface, although the enhancement is lower than those obtained on the microporous surface. The critical heat flux is also considerably lower for the nanowire surface than for the plain surface.

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Section: Introductionmentioning

confidence: 99%

Enhancement of Heat Transfer with Pool and Spray Impingement Boiling on Microporous and Nanowire Surface Coatings

Thiagarajan¹,

Wang²,

Yang³

et al. 2010

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“…[1][2][3] For example, interfacial thermal transport at a nanometer scale is important in molecular electronics and conventional integrated circuits, 1,4,5 polymeric composites used in the air-vehicle industry, 6 layered structures for thermal barrier coatings, 7 nanostructured thermoelectric materials, [8][9][10] and could play a role in the eventual development of thermal rectifiers. 11,12 Interface thermal conductance is also important at solid-liquid interfaces for cases including nanoparticle medical therapies, 13,14 evaporation, 15 spray cooling, 16 and electrochemistry. 17,18 In this letter, we examine the fundamental mechanisms that control heat transfer at solid-liquid interfaces through measurements of the interface thermal conductance as a function of the bonding between an organic film and water.…”

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confidence: 99%

The influence of interface bonding on thermal transport through solid–liquid interfaces

Harikrishna

Ducker

Huxtable

2013

Applied Physics Letters

102

109

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We use time-domain thermoreflectance to show that interface thermal conductance, G, is proportional to the thermodynamic work of adhesion between gold and water, WSL, for a series of five alkane-thiol monolayers at the gold-water interface. WSL is a measure of the bond strength across the solid-liquid interface. Differences in bond strength, and thus differences in WSL, are achieved by varying the terminal group (ω-group) of the alkane-thiol monolayers on the gold. The interface thermal conductance values were in the range 60–190 MW m−2 K−1, and the solid-liquid contact angles span from 25° to 118°.

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“…This study demonstrates the possibility of extending the range of use of the mathematical apparatus [5][6][7][8] to solve the conjugate problems of the drop spreading under the gravitational forces on the substrates of a more complex geometry in terms of the heat transfer processes and phase transformations intensification.…”

Section: Epj Web Of Conferencesmentioning

confidence: 99%

“…The importance of studying the heat transfer in a drop of liquid and its vaporization is determined by the need to improve the spray cooling technology for surfaces [6].…”

mentioning

confidence: 99%

Numerical study of the viscous drop spreading process when transferring heat to a substrate of simple geometry

Krainov

Кузнецов

2015

EPJ Web of Conferences

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Abstract. We present a two-dimensional non-stationary model for calculating heat transfer when spreading a liquid viscous drop on a heated substrate. Calculations on the process of fixed drops spreading on a substrate of simple geometry are performed. The hydrodynamic picture of the spreading process is obtained. The influence of the model parameters on the nature of spreading is studied. The temperature profiles of the droplet surface are obtained. The estimation of the time to establish a stationary mode is obtained.

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Single nozzle spray cooling heat transfer mechanisms

Cited by 223 publications

References 13 publications

Enhancement of Heat Transfer with Pool and Spray Impingement Boiling on Microporous and Nanowire Surface Coatings

Enhancement of Heat Transfer with Pool and Spray Impingement Boiling on Microporous and Nanowire Surface Coatings

The influence of interface bonding on thermal transport through solid–liquid interfaces

Numerical study of the viscous drop spreading process when transferring heat to a substrate of simple geometry

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