Jet impingement and spray cooling using slurry of nanoencapsulated phase change materials

Wu, Wei; Bostanci, Huseyin; Chow, L. C.; Ding, Shi‐Jin; Yan, Hong; Su, Ming; Kizito, John P.; Gschwender, Lois J.; Snyder, Carl E.

doi:10.1016/j.ijheatmasstransfer.2011.03.022

Cited by 84 publications

(22 citation statements)

References 10 publications

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“…More and more applications demand a detailed understanding of nanodroplets such as for instance 3D nanoprinting, nanomedicine, phase-change cooling using nanosprays and microdeposition processes [1][2][3]. Remarkable achievements have been obtained rather recently by printing organic molecules at the nanoscale [4].…”

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confidence: 99%

How Wettability Controls Nanoprinting

et al. 2020

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Using large scale molecular dynamics (MD) simulations we study in detail the impact of nanometer droplets of low viscosity on flat substrates versus the wettability of the solid plate. The comparison between the MD simulations and different macroscopic models reveals that most of these models do not correspond to the simulation results at the nanoscale in particular for the maximal contact diameter during the nanodroplet impact (Dmax). We have developed a new model for Dmax which is in agreement with the simulation data and also takes into account the effects of the liquid-solid wettability. We also propose a new scaling for the time required to reach the maximal contact diameter, tmax with respect to the impact velocity which is also in agreement with the observations. With the new model for Dmax plus the scaling found for tmax, we present a master curve collapsing the evolution of the nanometer drop contact diameter during impact for different wettabilities and different impact velocities. We believe our results may help to design better nanoprinters since they provide an estimation of the maximum impact velocities required to obtain a smooth and homogenous coverage of the surfaces without dry spots.

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confidence: 99%

How Wettability Controls Nanoprinting

et al. 2020

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“…Simple calculations show that for a flow rate of 20L/min this is of the order of 1 millisecond, too short for any significant melting to take place. Results in the literature for a submerged jet system with a different phase change coolant (encapsulated paraffin wax) support this conclusion, as it was found that the cooling performance due to melting was strongly flow rate dependant [12]. An alternative explanation may be a layer of water which prevents the binary ice melting in contact with the surface.…”

Section: Binary Icementioning

confidence: 80%

Development of a higher power cooling system for lithium targets

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et al. 2015

Applied Radiation and Isotopes

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The accelerator based Boron Neutron Capture Therapy beam at the University of Birmingham is based around a solid thick lithium target cooled by heavy water. Significant upgrades to Birmingham's Dynamitron accelerator are planned prior to commencing a clinical trial. These upgrades will result in an increase in maximum achievable beam current to at least 3 mA. Various upgrades to the target cooling system to cope with this increased power have been investigated. Tests of a phase change coolant known as "binary ice" have been carried out using an induction heater to provide a comparable power input to the Dynamitron beam. The experimental data shows no improvement over chilled water in the submerged jet system, with both systems exhibiting the same heat input to target temperature relation for a given flow rate. The relationship between the cooling circuit pumping rate and the target temperature in the submerged jet system has also been tested.

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“…Improvement in the thermal performance of the system can be achieved by adding nanoPCMs of sphere shape to the impinging fluid. Wu et al [158] performed an experimental study using the particulate form of polymer-encapsulated PCM (nanoPCM) added to the water in the jet impingement technique and spray cooling to enhance heat transfer, as presented in Figure 16. The change of phase from solid to liquid of paraffin makes nanoPCMs absorb heat.…”

Section: Nanofluidsmentioning

confidence: 99%

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

et al. 2021

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Jet impingement is considered to be an effective technique to enhance the heat transfer rate, and it finds many applications in the scientific and industrial horizons. The objective of this paper is to summarize heat transfer enhancement through different jet impingement methods and provide a platform for identifying the scope for future work. This study reviews various experimental and numerical studies of jet impingement methods for thermal-hydraulic improvement of heat transfer surfaces. The jet impingement methods considered in the present work include shapes of the target surface, the jet/nozzle–target surface distance, extended jet holes, nanofluids, and the use of phase change materials (PCMs). The present work also includes both single-jet and multiple-jet impingement studies for different industrial applications.

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Jet impingement and spray cooling using slurry of nanoencapsulated phase change materials

Cited by 84 publications

References 10 publications

How Wettability Controls Nanoprinting

How Wettability Controls Nanoprinting

Development of a higher power cooling system for lithium targets

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

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