文献类型：期刊文献

英文题名：Research on heat transfer performance of water film for outside the tubes of the microscale evaporative condenser

作者：Hu, Minghui[1]; Zhu, Dongsheng[1,2]; Shen, Jialong[2]

机构：[1] School of Mcchanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China

年份：2010

卷号：2

起止页码：35

外文期刊名：Proceedings of the ASME Micro/Nanoscale Heat and Mass Transfer International Conference 2009, MNHMT2009

收录：EI(收录号：20102813064550)

语种：英文

外文关键词：Regression analysis - Air - Evaporators - Refrigeration - Heat exchangers - Evaporative cooling systems

摘要：It is requested to develop a microscale and high performance heat exchanger for small size energy equipments. The heat transfer performance of the water film on the condensing coils of the microscale evaporative condenser was studied for a single-stage compressed refrigeration cycle system. Under various operation conditions, the effects of the spray density and the head-on air velocity on the heat transfer performance of the water film were investigated. The results show that the microscale heat transfer coefficient of the water film αw increases with the increase of spray density and decreases with the increase of head-on air velocity. The results indicate that the key factor affecting the microscale heat transfer of the water film is the spray density. As the results, it is measured that the present device attained high heat transfer quantity despite the weight is light. In addition, via regression analysis of the experimental data, the correlation equation for calculating the microscale heat transfer coefficient of the water film was obtained, its regression correlation coefficient R is 0.98 and the standard deviation is 7.5%. Finally, the correlations from other works were compared. The results presented that the experimental correlation had better consistency with the correlations from other works. In general, the obtained experimental results of the water film heat transfer are helpful to the design and practical operation of the microscale evaporative condensers. Copyright ? 2009 by ASME.