Filmwise Condensation Heat Transfer Enhancement with Dropwise and Filmwise Coexisting Condensation Surfaces

CIESC Journal

• Volume 6 • 下一篇

Filmwise Condensation Heat Transfer Enhancement with Dropwise and Filmwise Coexisting Condensation Surfaces

马学虎¹; 王补宣²; 徐敦颀¹; 林纪方¹

¹ Chemical Engineering Department，Dalian University of Technology，Dalian 116012，China
² Thermal Engineering Department，Tsinghua University，Beijing 100084，China

收稿日期:1997-08-18 修回日期:1900-01-01 出版日期:1998-06-28 发布日期:1998-06-28
通讯作者: 马学虎

Filmwise Condensation Heat Transfer Enhancement with Dropwise and Filmwise Coexisting Condensation Surfaces

Ma Xuehu¹; Wang Buxuan²; Xu Dunqi¹; Lin Jifang¹

¹ Chemical Engineering Department，Dalian University of Technology，Dalian 116012，China
² Thermal Engineering Department，Tsinghua University，Beijing 100084，China

Received:1997-08-18 Revised:1900-01-01 Online:1998-06-28 Published:1998-06-28
Contact: Ma Xuehu

摘要/Abstract

摘要： Six surfaces were prepared with different surface division patternsfor the experimental investigation of steam condensation
heat transfer characteristics for dropwise and filmwise coexisting （DFC） condensation surfacesunder atmospheric pressure．
Dropwise condensation （DWC） was promoted withan ultrathin polytetrafluoroethylene （PTFE） film，which was prepared by
thedynamic ion-beam mixed implantation （DIMI） method． The results showed thatthe condensation phenomena at the
intersection between the dropwise and filmwisecondensation regions were quite different for different relative positions
ofthe dropwise and filmwise condensation regions．The experimental results revealedthat the condensation heat transfer
characteristics were highly influenced bythe surface division number and the relative area ratio of the dropwise andfilmwise
condensation regions．The impact of these findings on heat transferenhancement mechanism for condensation heat transfer is
discussed in detail．

关键词: dropwise and filmwise coexisting condensation;heat transfer enhancement;polymer film

Abstract: Six surfaces were prepared with different surface division patternsfor the experimental investigation of steam condensation
heat transfer characteristics for dropwise and filmwise coexisting （DFC） condensation surfacesunder atmospheric pressure．
Dropwise condensation （DWC） was promoted withan ultrathin polytetrafluoroethylene （PTFE） film，which was prepared by
thedynamic ion-beam mixed implantation （DIMI） method． The results showed thatthe condensation phenomena at the
intersection between the dropwise and filmwisecondensation regions were quite different for different relative positions
ofthe dropwise and filmwise condensation regions．The experimental results revealedthat the condensation heat transfer
characteristics were highly influenced bythe surface division number and the relative area ratio of the dropwise andfilmwise
condensation regions．The impact of these findings on heat transferenhancement mechanism for condensation heat transfer is
discussed in detail．

Key words: dropwise and filmwise coexisting condensation, heat transfer enhancement, polymer film

马学虎, 王补宣, 徐敦颀, 林纪方. Filmwise Condensation Heat Transfer Enhancement with Dropwise and Filmwise Coexisting Condensation Surfaces[J]. CIESC Journal.

Ma Xuehu, Wang Buxuan, Xu Dunqi, Lin Jifang. Filmwise Condensation Heat Transfer Enhancement with Dropwise and Filmwise Coexisting Condensation Surfaces[J]. .

Filmwise Condensation Heat Transfer Enhancement with Dropwise and Filmwise Coexisting Condensation Surfaces

Filmwise Condensation Heat Transfer Enhancement with Dropwise and Filmwise Coexisting Condensation Surfaces

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