Enhanced steam condensation heat transfer on a scalable honeycomb-like microporous superhydrophobic surface under various pressures

Zhang, Tian-Yu; Mou, Lin-Wei; Fan, Li‐Wu

doi:10.1016/j.applthermaleng.2020.116453

Cited by 22 publications

(4 citation statements)

References 33 publications

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“…12C ). 203 The resultant micro and nano structured copper surface exhibited sustainable jumping droplet condition at higher subcooling temperature compared to smooth hydrophobic surfaces ( Fig. 12D ).…”

Section: Condensationmentioning

confidence: 96%

“…18,200,201 Jumping droplet condensation performance depends largely on the nanostructure shape, size, orientation, and density. 201,203 For the development of optimized micro and nanostructured surfaces researchers have reported methods such as machining, 204 sandblasting, 205 laser ablation, 206 thermal 207 or chemical oxidation, 18,208,209 chemical etching, 210,211 jet electrolyte micromachining, 212 photolithography, 205 nanoimprint lithography, 213 dry reactive ion etching, 214 electrodeposition 203 etc. However, majority of these micro and nano structure fabrication methods are complex, not scalable, not suitable for large scale industrial application, and are only limited to substrate materials such as silicon which are not commonly used for industrial condenser.…”

Section: Condensationmentioning

confidence: 99%

“…Researchers have reported many micro and nanoscale oxide or etched structures that are capable of exhibiting jumping droplet condensation at lower surface subcooling and at low supersaturation conditions. Some of these structures are knifelike nanostructures, 215 nanograss, 199 nanowires, 216 hierarchical-porous nanostructures, 203 nanocones, 217 ribbed nanoneedles, 218 and platelet like nanostructures 201 fabricated on common substrate materials such as silicon, copper, and aluminum ( Fig. 10B ).…”

Section: Condensationmentioning

confidence: 99%

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Advances in micro and nanoengineered surfaces for enhancing boiling and condensation heat transfer: a review

et al. 2023

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Section: Condensationmentioning

confidence: 96%

Section: Condensationmentioning

confidence: 99%

Section: Condensationmentioning

confidence: 99%

See 1 more Smart Citation

Advances in micro and nanoengineered surfaces for enhancing boiling and condensation heat transfer: a review

et al. 2023

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“…Therefore, the attached condensation phenomenon should be avoided in the application. The performances of steam condensation heat transfer on the superhydrophobic surface with scalable honeycomb-like microporous under different pressures were investigated by Zhang et al [ 125 ]. The condensation heat transfer coefficient on the honeycomb-like superhydrophobic and hydrophobic surfaces was displayed in Figure 28 .…”

Section: Condensation Heat Transfer On Superhydrophobic Surfacesmentioning

confidence: 99%

A Review of Recent Advances in Superhydrophobic Surfaces and Their Applications in Drag Reduction and Heat Transfer

Zhang

Yang

et al. 2021

Nanomaterials

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Inspired by the superhydrophobic properties of some plants and animals with special structures, such as self-cleaning, water repellent, and drag reduction, the research on the basic theory and practical applications of superhydrophobic surfaces is increasing. In this paper, the characteristics of superhydrophobic surfaces and the preparation methods of superhydrophobic surfaces are briefly reviewed. The mechanisms of drag reduction on superhydrophobic surfaces and the effects of parameters such as flow rate, fluid viscosity, wettability, and surface morphology on drag reduction are discussed, as well as the applications of superhydrophobic surfaces in boiling heat transfer and condensation heat transfer. Finally, the limitations of adapting superhydrophobic surfaces to industrial applications are discussed. The possibility of applying superhydrophobic surfaces to highly viscous fluids for heat transfer to reduce flow resistance and improve heat transfer efficiency is introduced as a topic for further research in the future.

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Sustained Condensation Efficiency on 3D Hybrid Surfaces

Lo,

Chen,

2024

Small Structures

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Condensation plays a crucial role in various applications. While superhydrophobic surfaces have been employed to enhance condensation, their performance significantly deteriorates with increasing subcooling, limiting their practicality. Hybrid surfaces offer a potential solution for improved condensation at high subcooling, but current designs fail to sustain effective condensation as subcooling rises. This study presents a three‐dimensional (3D) hybrid surface integrating short hydrophobic silicon nanowire arrays with hydrophilic microchannels. The formation of bridging droplets across multiple channels is observed, but they are efficiently removed from the 3D hybrid surface. The 3D hybrid surface exhibits sustained, simultaneous dropwise and filmwise condensation under medium to high subcooling conditions. Notably, it maintains a stable heat transfer coefficient across these subcooling conditions without experiencing the typical decline due to flooding observed on conventional surfaces at elevated subcooling temperatures. When compared to a plain hydrophilic surface at high subcooling, the 3D hybrid surface achieved remarkable improvements of 198% in condensation heat flux and 216% in heat transfer coefficient. This 3D hybrid surface represents a significant breakthrough for enhancing condensation in practical systems operating under high subcooling conditions.

show abstract

Enhanced steam condensation heat transfer on a scalable honeycomb-like microporous superhydrophobic surface under various pressures

Cited by 22 publications

References 33 publications

Advances in micro and nanoengineered surfaces for enhancing boiling and condensation heat transfer: a review

Advances in micro and nanoengineered surfaces for enhancing boiling and condensation heat transfer: a review

A Review of Recent Advances in Superhydrophobic Surfaces and Their Applications in Drag Reduction and Heat Transfer

Sustained Condensation Efficiency on 3D Hybrid Surfaces

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