NaCl溶液静态闪蒸传热特性实验研究  

Experimental Study on Heat Transfer Characteristics of Sodium Chloride Aqueous Solution in Static Flash Evaporation

作　　者：赵冰超[1] 杨庆忠[1] 张丹[1] 王进仕[1] 严俊杰[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《工程热物理学报》2013年第10期1874-1877,共4页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展计划(973计划)资助项目(No.2009CB219803);国家自然科学基金资助项目(No.51125027)

摘　　要：本文设计搭建了静态闪蒸实验台，对NaCl溶液静态闪蒸传热特性进行了实验研究。实验中，初始液膜厚度为0．2m、0．4m，初始盐水浓度为0—0．26，过热度为1．5—40℃。结果表明：闪蒸时间随着过热度的增加而逐渐增加；初始液膜厚度和浓度的增加，使闪蒸过程中不平衡分数的下降速率趋缓，导致平衡时刻不平衡分数升高；过热度的增加，使液膜中所包含的不稳定能量增多，使平衡时刻不平衡分数降低；平衡时刻体积传热系数随过热度的增加而逐渐减小。The heat transfer characteristics of sodium chloride aqueous solution in static flash evaporation was studied experimentally on the static flash evaporation system. The initial height of waterfilm was 0.2 m and 0.4 m, the initial concentration of sodium chloride aqueous solution and superheat were varied from 0 to 0.26 and from 1.5 to 40℃, respectively. The results show that, flash time gradually increases with the increase in superheat, and the equilibrium time of non- equilibrium fraction and volumetric heat transfer coeificient decreases gradually with the increasing superheat; the increasing initial height and concentration of waterfilm lead to the increase in equilibrium time of non- equilibrium fraction.

关 键 词：盐水溶液 静态闪蒸 闪蒸时间 不平衡分数 传热系数 

分 类 号：TK124[动力工程及工程热物理—工程热物理]