Modification and enhancement of cryogenic quenching heat transfer by a nanoporous surface

Hu, Hong; Xu, Cheng; Zhao, Yang; Shaeffer, Reid; Ziegler, Kirk J.; Chung, J. N.

doi:10.1016/j.ijheatmasstransfer.2014.09.056

Cited by 53 publications

(11 citation statements)

References 19 publications

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“…Hu et al 23,24 were the first to perform LN 2 quenching experiment using a nano-structured surface and proved its feasibility for enhancing heat transfer over the normal surface. This paper reported breakthrough advancements on both fronts of boiling and quenching.…”

Section: Effects Of Surface Modifications On Boiling and Quenching Heat Transfermentioning

confidence: 99%

“…The CHF in boiling and the Leidenfrost temperature in quenching are the bottlenecks to the heat transfer advancements. As compared to a conventional aluminum surface, Hu et al 23,24 reported a substantial enhancement of the CHF by 112% and an increase of the Leidenfrost temperature by 40K using an aluminum surface with anodized aluminum oxide (AAO) nanoporous texture finish. These heat transfer enhancements imply that the power density would increase by more than 100% and the quenching efficiency would be raised by 33%.…”

Section: Effects Of Surface Modifications On Boiling and Quenching Heat Transfermentioning

confidence: 99%

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Heat transfer enhancement in cryogenic quenching process

Chung

Darr

Dong

et al. 2020

International Journal of Thermal Sciences

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This paper reports a heat transfer advancement in the cryogenic quenching process. An experiment was performed to evaluate the enhancement of quenching heat transfer by the use of metal tubes with low thermal conductivity coating layers. Four coating thicknesses with various coolant mass flow rates of liquid nitrogen were investigated. The results indicated that the tube inner surface coating greatly enhanced the quenching efficiency. The quenching efficiency was found to increase with increasing number of coating layers, and the efficiency also increased with decreasing mass flow rates. In general, the efficiencies cover a range between 40.6% and 80%. Comparing to the bare surface case, the percentage increase in the quenching efficiency was the minimum at 4.2% for a single coated layer at the highest flow rate and the maximum of 109.1% for four coated layers at the lowest flow rate. The coated tubes could save up to 53% in the amount of cryogen consumption.

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Section: Effects Of Surface Modifications On Boiling and Quenching Heat Transfermentioning

confidence: 99%

Section: Effects Of Surface Modifications On Boiling and Quenching Heat Transfermentioning

confidence: 99%

Heat transfer enhancement in cryogenic quenching process

Chung

Darr

Dong

et al. 2020

International Journal of Thermal Sciences

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“…Another uncertainty source for temperature measurements comes from the DAQ whose uncertainty was ±0.1% full scale. In the current experiment, the inverse heat conduction methods 1 , 26 , 27 , 36 , 37 were used to obtain the surface heat fluxes from the measured temperatures. The uncertainty of the heat flux is calculated through a square root summation of partial derivatives.…”

Section: Methodsmentioning

confidence: 99%

“…Hu et al . 27 is the first to perform liquid nitrogen quenching experiment using a nano-structured surface and proved its feasibility for enhancing heat transfer over the normal surface. The current work not only extended the liquid nitrogen quenching experiment by Hu et al .…”

Section: Wall Temperature Controlled Quenching Heat Transfermentioning

confidence: 99%

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Boiling and quenching heat transfer advancement by nanoscale surface modification

Zhao

et al. 2017

Sci Rep

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All power production, refrigeration, and advanced electronic systems depend on efficient heat transfer mechanisms for achieving high power density and best system efficiency. Breakthrough advancement in boiling and quenching phase-change heat transfer processes by nanoscale surface texturing can lead to higher energy transfer efficiencies, substantial energy savings, and global reduction in greenhouse gas emissions. This paper reports breakthrough advancements on both fronts of boiling and quenching. The critical heat flux (CHF) in boiling and the Leidenfrost point temperature (LPT) in quenching are the bottlenecks to the heat transfer advancements. As compared to a conventional aluminum surface, the current research reports a substantial enhancement of the CHF by 112% and an increase of the LPT by 40 K using an aluminum surface with anodized aluminum oxide (AAO) nanoporous texture finish. These heat transfer enhancements imply that the power density would increase by more than 100% and the quenching efficiency would be raised by 33%. A theory that links the nucleation potential of the surface to heat transfer rates has been developed and it successfully explains the current finding by revealing that the heat transfer modification and enhancement are mainly attributed to the superhydrophilic surface property and excessive nanoscale nucleation sites created by the nanoporous surface.

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Leidenfrost drops on micro/nanostructured surfaces

Vishal

Behar

et al. 2018

Front. Energy

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Modification and enhancement of cryogenic quenching heat transfer by a nanoporous surface

Cited by 53 publications

References 19 publications

Heat transfer enhancement in cryogenic quenching process

Heat transfer enhancement in cryogenic quenching process

Boiling and quenching heat transfer advancement by nanoscale surface modification

Leidenfrost drops on micro/nanostructured surfaces

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