Journal of South China University of Technology (Natural Science Edition) ›› 2014, Vol. 42 ›› Issue (7): 110-116.doi: 10.3969/j.issn.1000-565X.2014.07.018

• Mechanical Engineering • Previous Articles     Next Articles

Enhanced Boiling Heat-Transfer Performance of Porous Microchannel Composite Structure

Zhou Shu-zhang1 Wang Yan-xin2 Hou Ting-bo1 Pan Min-qiang2 Tang Yong2   

  1. 1.School of Design，South China University of Technology,Guangzhou 510006,Guangdong,China; 2.School ofMechanical and Automotive Engineering∥Key Laboratory of Surface Functional Structure Manufacturing of GuangdongHigher Education Institutes,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2014-01-27 Revised:2014-05-05 Online:2014-07-25 Published:2014-06-01
  • Contact: 潘敏强(1979-)，男，博士，副教授，主要从事机械制造研究． E-mail:mqpan@scut.edu.cn
  • About author:周述璋(1970-)，男，副教授，主要从事机械设计研究． E-mail:szzhou@scut．edu．cn
  • Supported by:

    霍英东教育基金会高等院校青年教师基金资助项目( 132021) ; 广东省工业攻关项目( 2012B010500021) ; 广州市珠江科技新星项目( 2013J2200060)

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Abstract:

In the investigation,a porous micro-channel composite structure was designed and prepared.First,thecopper particles were sintered together with the base at high temperatures to form a porous layer structure of certainthickness.Then,a micro-channel structure of certain depth was made on the porous layer through wire-electrodecutting.The micro-channel structure is not only able to increase the surface area of sintered porous layer whenboiling but also provide steam channels to ensure the steam to escape when resistance becomes less,thus helpingbubbles go out easily.Meanwhile,when liquid is boiling violently,micro-channels can provide gas-liquid twophasechannels,thus separating gas with liquid.Finally,the influence of such key parameters as micro-channelnumber,micro-channel angle and micro-channel width and depth on the boiling heat-transfer performance wereanalyzed.Experimental results indicate that the more the micro-channel numbers and the larger the micro-channeldepth are,the more contact area of gas-liquid interface will bring about better enhanced boiling heat-transfer effect.

Key words: porous micro-channel, enhanced boiling, sintering