1.Institute of Seawater Desalination & Multipurpose Utilization, SOA, Tianjin 300192, China; ��
2.National Engineering Technology and Research Center for Seawater Utilization, Tianjin 300192, China
Abstract Based on the previous reported numerical simulation on falling film flow outside elliptical tubes,experimental study was conducted on the liquid film thickness outside elliptical tube and the heat transfer of falling film evaporation.The results showed that the liquid film thickness of numerical simulation basically reflected the experimental data with about 8% deviation range,so the numerical simulation was approved to be correct.The heat transfer coefficient of elliptical tube with long to short axis ratio of 1.5 is higher 20%—22% than that of the round tube,so elliptical tube can enhance heat transfer obviously.
2012, Vol. 29 
