Experimental investigation of condensation heat transfer on hybrid wettability finned tube with large amount of noncondensable gas

Hu, Haowei; Tang, G.H.; Dong, Ning

doi:10.1016/j.ijheatmasstransfer.2015.02.006

Cited by 71 publications

(31 citation statements)

References 36 publications

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“…So preferential nucleation and growth of the droplet at the top of the rough structure is an important principle for designing high efficient dropwise condensation heat transfer surface due to its restriction to the inside nucleation. Based on this principle, numerous advanced surface treatment technologies 39,40 have been developed to prepare the hybrid surface to achieve the droplet self-organization in which the top of the rough structure is hydrophilic and easy to nucleate. This design can guarantee that the large droplets always stay at the top of the rough structure and avoid the inside nucleation or ooding condensation.…”

Section: The Effect Of the Existing Droplet Size On Droplet Nucleatiomentioning

confidence: 99%

Molecular dynamics simulation of droplet nucleation and growth on a rough surface: revealing the microscopic mechanism of the flooding mode

Dong

Tang

2018

RSC Adv.

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Section: The Effect Of the Existing Droplet Size On Droplet Nucleatiomentioning

confidence: 99%

Molecular dynamics simulation of droplet nucleation and growth on a rough surface: revealing the microscopic mechanism of the flooding mode

Dong

Tang

2018

RSC Adv.

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“…Advanced enhancement technologies of condensation heat transfer have the potential to significantly improve thermal efficiency and reduce the cost of energy consumption in many applications such as the electricity, water desalination and chemical engineering. In particular, it has been confirmed that the dropwise condensation is able to produce heat transfer coefficient an order of magnitude higher than the filmwise condensation 1 2 3 4 . Furthermore, the mode of condensation mainly depends on the surface wettability.…”

mentioning

confidence: 94%

The effect of surface wettability on water vapor condensation in nanoscale

Dong

Tang

2016

Sci Rep

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The effect of surface wettability on condensation heat transfer in a nanochannel is studied with the molecular dynamics simulations. Different from the conventional size, the results show that the filmwise mode leads to more efficient heat transfer than the dropwise mode, which is attributed to a lower interfacial thermal resistance between the hydrophilic surface and the condensed water compared with the hydrophobic case. The observed temperature jump at the solid-liquid surface confirms that the hydrophilic properties of the solid surface can suppress the interfacial thermal resistance and improve the condensation heat transfer performance effectively.

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“…Changing surface geometry, i.e., via roughening, fins, and external modifications on condenser tubes [66]; • Use of external forces to enhance condensing phenomena (active method).…”

Section: Optimal Surface Conditioningmentioning

confidence: 99%

Review of Micro–Nanoscale Surface Coatings Application for Sustaining Dropwise Condensation

et al. 2019

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Condensation occurs in most of the heat transfer processes, ranging from cooling of electronics to heat rejection in power plants. Therefore, any improvement in condensation processes will be reflected in the minimization of global energy consumption, reduction in environmental burdens, and development of sustainable systems. The overall heat transfer coefficient of dropwise condensation (DWC) is higher by several times compared to filmwise condensation (FWC), which is the normal mode in industrial condensers. Thus, it is of utmost importance to obtain sustained DWC for better performance. Stability of DWC depends on surface hydrophobicity, surface free energy, condensate liquid surface tension, contact angle hysteresis, and droplet removal. The required properties for DWC may be achieved by micro–nanoscale surface modification. In this survey, micro–nanoscale coatings such as noble metals, ion implantation, rare earth oxides, lubricant-infused surfaces, polymers, nanostructured surfaces, carbon nanotubes, graphene, and porous coatings have been reviewed and discussed. The surface coating methods, applications, and enhancement potential have been compared with respect to the heat transfer ability, durability, and efficiency. Furthermore, limitations and prevailing challenges for condensation enhancement applications have been consolidated to provide future research guidelines.

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Experimental investigation of condensation heat transfer on hybrid wettability finned tube with large amount of noncondensable gas

Cited by 71 publications

References 36 publications

Molecular dynamics simulation of droplet nucleation and growth on a rough surface: revealing the microscopic mechanism of the flooding mode

Molecular dynamics simulation of droplet nucleation and growth on a rough surface: revealing the microscopic mechanism of the flooding mode

The effect of surface wettability on water vapor condensation in nanoscale

Review of Micro–Nanoscale Surface Coatings Application for Sustaining Dropwise Condensation

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