標題: Enhancing Condensation Heat Transfer on Three-Dimensional Hybrid Surfaces
作者: Lo, Ching-Wen
Chu, Yu-Cheng
Yen, Ming-Han
Lu, Ming-Chang
機械工程學系
Department of Mechanical Engineering
公開日期: 20-Nov-2019
摘要: In recent years, micro/nanostructured surfaces have been applied to enhance condensation heat transfer. However, condensation heat transfer is greatly deteriorated by the flooding phenomenon that occurs at high subcooling temperatures. Here, we propose a three-dimensional (3D) hybrid surface to enhance the condensation at high subcooling temperatures. The 3D hybrid surface consisted of superhydrophobic (SHB) Si nanowire (SiNW) arrays and hydrophilic microchannels. The microchannels could confine the liquid-film thickness, and the liquid bridges formed on the 3D hybrid surfaces could be self-removed. Both of these characteristics prevent the surfaces from flooding. In addition, liquid droplets formed in the SiNW regions were dragged into the microchannels, which also improved the heat transfer. The heat transfer coefficient on the 3D hybrid surface could be enhanced over a large subcooling range. More remarkably, a record high heat flux of 655 +/- 10 kW.m(-2) was obtained on the 3D hybrid surface.
URI: http://dx.doi.org/10.1016/j.joule.2019.08.005
http://hdl.handle.net/11536/153391
ISSN: 2542-4351
DOI: 10.1016/j.joule.2019.08.005
期刊: JOULE
Volume: 3
Issue: 11
起始頁: 2806
結束頁: 2823
Appears in Collections:Articles