Density Maximization of One-Step Electrodeposited Copper Nanocones and Dropwise Condensation Heat-Transfer Performance Evaluation

2020 ◽  
Vol 12 (21) ◽  
pp. 24512-24520 ◽  
Author(s):  
Rui Wang ◽  
Feifei Wu ◽  
Dandan Xing ◽  
Fanfei Yu ◽  
Xuefeng Gao
Keyword(s):  
Heat Transfer ◽  
Performance Evaluation ◽  
Heat Transfer Performance ◽  
Condensation Heat Transfer ◽  
Transfer Performance ◽  
Dropwise Condensation ◽  
One Step

Fabrication of copper-based ZnO nanopencil arrays with high-efficiency dropwise condensation heat transfer performance

RSC Advances ◽  
2016 ◽  
Vol 6 (64) ◽  
pp. 59405-59409 ◽  
Author(s):  
Mengnan Qu ◽  
Jia Liu ◽  
Jinmei He
Keyword(s):  
Heat Transfer ◽  
Zinc Oxide ◽  
Heat Transfer Coefficient ◽  
Transfer Coefficient ◽  
Heat Transfer Performance ◽  
High Efficiency ◽  
Condensation Heat Transfer ◽  
Transfer Performance ◽  
Dropwise Condensation ◽  
Condensation Heat Transfer Coefficient

A copper-based zinc oxide nanopencil array film was reported. Compared with hydrophobic flat Cu surface, it exhibits condensate microdrop self-propelling function and maximal ∼140% enhancement in dropwise condensation heat transfer coefficient.

Influence of Ni-P Coating Microstructure on Condensation Heat Transfer

2010 ◽  
Author(s):  
Lin Cheng ◽  
Yanhai Cheng ◽  
Gongming Xin ◽  
Yong Zou
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Performance ◽  
Water Flow Rate ◽  
Amorphous State ◽  
Steel Tube ◽  
Condensation Heat Transfer ◽  
Nanocrystalline Phase ◽  
Transfer Performance ◽  
Dropwise Condensation ◽  
Cooling Water Flow Rate

The higher heat transfer performance due to dropwise condensation as compared with filmwise condensation has been of considerable interest to many researchers around the world. In this study, the effect of microstructure of Ni-P coating on condensation heat transfer performance was reported. The Ni-P deposits with various microstructures, such as nano-crystalline, amorphous and co-existence of both, could be obtained on the low carbon steel tube by adjusting the electroless plating processing parameters. The experimental results show that the steel tube with electroless Ni-P coating can greatly improve the performance of condensation heat transfer compared to un-coated steel tubes. The condensation state on tubes with Ni-P coating depends on the cooling water flow rate and steam temperature, it shows the co-existence state of both dropwise and filmwise on most working conditions. At the same time, the heat transfer efficiency of condensation is improved with the decreasing of the amounts of nanocrystalline phase in Ni-P deposit, because it can increase the free surface energy of surface. Therefore, increasing the degree of amorphous state of Ni-P coating will provide a better dropwise condensation effect.

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