Heat Transfer Characteristics of Dropwise Condensation of Steam on Vertical Polymer Coated  Plates

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Heat Transfer Characteristics of Dropwise Condensation of Steam on Vertical Polymer Coated
Plates

MA Xuehu; CHEN Jiabin; XU Dunqi; LIN Jifang

Institute of Chemical Engineering, Dalian University of Technology, Dalian 116012, China

Received:1900-01-01 Revised:1900-01-01 Online:2001-03-28 Published:2001-03-28
Contact: MA Xuehu

聚合物涂层竖板上水蒸气滴状冷凝传热特性的研究

马学虎; 陈嘉宾; 徐敦颀; 林纪方

Institute of Chemical Engineering, Dalian University of Technology, Dalian 116012, China

通讯作者: 马学虎

Abstract

Abstract: The plasma polymerization method and dynamic ion-beam mixed implantation method were
employed to coat ultra-thin polymer films on copper plates. Experiments indicated that
steady dropwise condensation of steam at atmospheric pressure occurred. The condensation
heat transfer coefficients increased by approximately 3 and 5－7 times for the
polytrimethylvinylsilane film and polytetrafluoroethylene film respectively, compared with
the value for film condensation under the same experimental conditions. The temperatures on
the condensing surface and inside the test block were found to be rapidly and randomly
fluctuated. The properties of the coated films and advantages of the methods used in this
investigation were discussed briefly.

Key words: dropwise condensation heat transfer, polymer film, temperature fluctuation

摘要： The plasma polymerization method and dynamic ion-beam mixed implantation method were
employed to coat ultra-thin polymer films on copper plates. Experiments indicated that
steady dropwise condensation of steam at atmospheric pressure occurred. The condensation
heat transfer coefficients increased by approximately 3 and 5－7 times for the
polytrimethylvinylsilane film and polytetrafluoroethylene film respectively, compared with
the value for film condensation under the same experimental conditions. The temperatures on
the condensing surface and inside the test block were found to be rapidly and randomly
fluctuated. The properties of the coated films and advantages of the methods used in this
investigation were discussed briefly.

关键词: dropwise condensation heat transfer;polymer film;temperature fluctuation

MA Xuehu, CHEN Jiabin, XU Dunqi, LIN Jifang. Heat Transfer Characteristics of Dropwise Condensation of Steam on Vertical Polymer Coated
Plates[J]. .

马学虎, 陈嘉宾, 徐敦颀, 林纪方. 聚合物涂层竖板上水蒸气滴状冷凝传热特性的研究[J]. CIESC Journal.

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