Dropwise condensation heat transfer enhancement on surfaces micro/nano structured by a two-step electrodeposition process

作     者：Hamid Reza TALESH BAHRAMI Alireza AZIZI Hamid SAFFARI 

作者机构：School of Mechanical Engineering Iran University of Science and Technology 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2019年第26卷第5期

页      面：1065-1076页

核心收录：

学科分类：080701[工学-工程热物理] 08[工学] 0807[工学-动力工程及工程热物理] 

主　　题：dropwise condensation heat transfer electrodeposition micro/nano structure porosity 

摘      要：Condensation is an important regime of heat transfer which has wide applications in different industries such as power plants,heating,ventilating and air conditioning,and *** occurs in two different modes including filmwise (FWC) and dropwise (DWC) *** occurring on hydrophobic and superhydrophobic surfaces has a much higher heat transfer capacity than ***,wide investigations have been done to produce DWC in recent *** surfaces have micro/nano structures with low surface *** this study,a two-step electrodeposition process is used to produce micro/nano structures on copper *** surface energy of specimens is reduced by a self-assembled monolayer using ethanol and 1-octadecanethiol *** results show that there is an optimum condition for electrodeposition *** example,a surface prepared by 2000 s step time has 5 times greater heat transfer than FWC while a surface with 4000 s step time has nearly the same heat transfer as *** surfaces of the fabricated specimens are examined using XRD and SEM *** SEM analyses of the surfaces show that there are some micro-structures on the surfaces and the surface porosities are reduced by increasing the second step electrodeposition time.