文献类型：期刊文献

英文题名：Tubes with coated and sintered porous surface for highly efficient heat exchangers

作者：Xu, Hong[1];Dai, Yulin[1];Cao, Honghai[2];Liu, Jinglei[1];Zhang, Li[1];Xu, Mingjie[3];Cao, Jun[1];Xu, Peng[1];Liu, Jianshu[2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Wuxi Chem Equipment Co Ltd, Wuxi 214131, Peoples R China;[3]Univ Calif Irvin, Dept Mat Sci & Engn, Irvine, CA 92697 USA

年份：2018

卷号：12

期号：3

起止页码：367

外文期刊名：FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING

收录：;EI(收录号：20181705050180);WOS:【SCI-EXPANDED(收录号:WOS:000445220700006)】；

基金：This research work is supported by the National High Technology Research and Development Program of China (Granted No. 2006AA05Z206), China National Torch Program, Research Grant (No. 16DZ2260600) from Science and Technology Commission of Shanghai Municipality, and the Fundamental Research Funds for the Central Universities (Nos. 222201717012 and 222201718005) and SINO PEC et al.

语种：英文

外文关键词：microporous coating layer; surface modification; boiling enhancement; sintering

摘要：Surface modification is a direct and effective way to enhance the efficiency of heat exchangers. Surface modification by forming a microporous coated layer can greatly enhance the boiling heat transfer and thus achieve a high performance. In this paper, we systematically investigate the boiling behavior on a plain surface with/without sintered microporous coatings of copper powder. The results demonstrated that the sintered surface has a better performance in nucleate boiling due to the increased nucleation sites. The superheat degree is lower and the bubble departure diameter is larger for the sintered surface than for the plain surface, so the heat can be carried away more efficiently on the sintered surface. In addition, the heat transfer capacity on the sintered surface depends on both the powder size and the coating thickness for a high flux tube. The optimum heat transfer capacity can be obtained when the thickness of the microporous coating layer is 3-5 times of the sintered powder diameter. As a result, the heat transfer coefficient tube can be up to 3 times higher for the tube with a sintered surface than that with a plain surface, showing a pronounced enhancement in heat transfer and a high potential in chemical engineering industry application.