Graphene-mediated electrospray cooling for discrete heat sources in microslits

Lay, Kok Keong; Wong, Kiing S.; Lim, Fang Sheng; Hung, Yew Mun; Tan, Ming K.

doi:10.1016/j.ijthermalsci.2021.106882

Cited by 10 publications

(2 citation statements)

References 58 publications

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“…The development of graphene, which can enhance two-phase heat transfer, has enabled many applications such as two-phase closed thermosiphons 21 , light-emitting diode cooling 22 , and electrospray cooling 23 . In particular, graphene nanobush, also known as graphene nanowalls or vertical graphene, have a unique three-dimensional nanostructure that can be directly grown using the well-established plasma-enhanced chemical vapor deposition (PECVD) method [24][25][26][27] , which eliminates the complicated commonly used micro/nanofabrication procedures.…”

Section: Introductionmentioning

confidence: 99%

Suppression of the Leidenfrost Phenomenon by Superhydrophilic Graphene Nanobush

Chen,

Wang,

Zhu

et al. 2024

Preprint

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The Leidenfrost phenomenon considerably reduces the heat transfer at high temperatures, but proper micro/nanofabrication can enhance the heat transfer by elevating the Leidenfrost temperature. However, the complicated micro/nanofabrication techniques are difficult to implement in large-scale commercial applications. This paper describes superhydrophilic graphene nanobush (SGNB) on Cu plates prepared by the PECVD method and subsequent air plasma etching that improves the spray cooling heat transfer. The results show that the Leidenfrost temperature of SGNB/Cu plate is up to 240 °C greater than that of a bare Cu surface. The much higher temperature on the SGNB/Cu surface is due to the fast water wicking and spreading by the nanobush superhydrophilicity, as well as increased heat transfer area, increased number of boiling nucleation sites and the robust vapor channels provided by the porous nanobush structure. This study shows the great ability of the nanobush for enhancing the boiling heat transfer and a feasible strategy for suppressing the Leidenfrost phenomenon.

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Section: Introductionmentioning

confidence: 99%

Suppression of the Leidenfrost Phenomenon by Superhydrophilic Graphene Nanobush

Chen,

Wang,

Zhu

et al. 2024

Preprint

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show abstract

“…The highly water permeative property of GNPs distributes the water over the surface of GNPs-coated substrate to promote filmwise evaporation and facilitates a significantly higher evaporation rate owing to the increased heat transfer area [11,12]. This unique property of graphene-based materials has been effectively applied in the phase-change heat transfer devices, such as two-phase closed thermosyphons [8,9,13], heat pipes [14], micro heat pipes [15,16], microchannels [17,18] and pool boiling systems [10,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%