Heat Transfer Coefficient of Horizontal-Tube Falling Film Evaporators

摘要：

A set of experimental facilities were set up to measure the heat transfer coefficient of horizontaltube falling film evaporators. The effect of spray density, saturation temperature, total temperature difference and inlet steam velocity on the overall heat transfer coefficient K is studied. The tube is made of HAL77-2A aluminium brass with an outer diameter of 25.4 mm. Fluids inside and outside the tube are steam and fresh water respectively. The results indicate that the growth of spray density and saturation temperature helps to increase the K. The K could also be increased by reducing total temperature difference. However, the impact of inlet steam velocity on the K is less significant. Furthermore impact of total temperature difference and inlet steam velocity on the temperature difference loss is also presented. These results provide a basis for further developing high efficiency evaporators in the field of seawater desalination.

关键词： horizontal-tube falling film evaporator heat transfer coefficient temperature difference loss seawater desalination

作者: S. Q. Shen G. T. Liang X. S.Mu R. Liu L. Y. Gong

作者单位: Key Laboratory for Sea Water Desalination of Liaoning Province, Dalian University of Technology, Dalian 116024, China

会议类型: 国际会议

会议名称: The 7th International Conference on Fluid and Thermal Energy Conversion(第七届流动技术与热能转化国际会议 FTEC 2011)

会议地点: 郑州

会议语种:英文

页码: 208-215

在线出版日期: 2011-09-24（万方平台首次上网日期，不代表论文的发表时间）