文献类型：期刊文献

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

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

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

机构：[1]State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;[2]Wuxi Chemical Equipment Co., Ltd, Wuxi 214131, China;[3]Department of Material Science and Engineering, University of California in Irvin, CA 92697, USA

年份：2018

卷号：12

期号：3

起止页码：367

中文期刊名：Frontiers of Chemical Science and Engineering

外文期刊名：化学科学与工程前沿（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2017_2018】；PubMed;

语种：英文

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

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.
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.