中国电机工程学报2011，Vol.31Issue(20)：81-87,7.
海水淡化系统中水平管降膜蒸发器流动与传热特性数值研究
Numerical Study on Flow and Heat Transfer Characteristics of Horizontal-tube Falling-film Evaporators in Seawater Desalination System
摘要
Abstract
A three-dimensional distributed parameter model of a horizontal-tube felling-film evaporator was set up to understand and improve the flow and heat transfer performance of the fluid in key local region. The mass flow rate distribution of heating steam and characteristics such as flow field of seawater were analyzed in detail using the self-built software, which was helpful to intuitively investigate the working process and complex flow and heat transfer phenomena. The present model was verified by operating results. Furthermore, the numerical results show that the mass flow rate and thermal load of the fluid is mutually matched, which indicates that the self-compensation characteristics exist in the first and second tube-pass bundle. The distributed parameters show that the flow density becomes less and the seawater gets saltier with falling film flowing. In addition, the dependent relationship between the heating steam flow rate, the intake seawater flow rate and the amount of vapor formed in the effect is summarized to evaluate its influence on the thermal performance and scaling of evaporators, which can provide the theoretical basis for economic operation and further stucture optimization.关键词
水平管降膜蒸发器/分布参数模型；流动与换热；数值模拟；海水淡化Key words
horizontal-tube falling-film evaporator/ distributed parameter model/ flow and heat transfer/ numerical simulation/ seawater desalination分类
能源科技引用本文复制引用
侯昊,毕勤成,张晓兰..海水淡化系统中水平管降膜蒸发器流动与传热特性数值研究[J].中国电机工程学报,2011,31(20):81-87,7.基金项目
国家重点基础研究发展计划项目(973项目)(2009CB219805)。 （973项目）
