纯水循环闪蒸显热转化率的实验研究  

Experimental Study on Sensible Heat Conversion Rate of Circulatory Flash Evaporation

作　　者：张友森[1] 王超[1] 严俊杰[1] 王进仕[1] 张焱[1] 张伟[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,西安710049

出　　处：《工程热物理学报》2015年第2期356-359,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51125027;No.51306184);国家科技支撑计划资助项目(No.2011BAA04BO3)

摘　　要：循环闪蒸中初始液膜具有水平速度,使得循环闪蒸特性与静态闪蒸具有很大的不同。本文设计并搭建了循环闪蒸实验台,研究了在不同主循环流量(400,600,800,1000,1200 L·h^(-1))、闪蒸腔压力(7.4,12.3,19.9,31.2 kPa)和初始液膜高度(140~250。mm)下纯水循环闪蒸显热转化率随进口过热度的变化规律。实验结果表明,循环闪蒸显热转化率随着进口过热度先减小后增大。在同一过热度条件下,循环闪蒸显热转化率随着闪蒸腔压力的增大而增大,随着初始液膜高度增大而减小,随着主循环流量的增大而略有增大。Characteristics of circulatory flash evaporation is very different from that of static flash evaporation due to horizontal velocity.A circulatory flash evaporation system was built to study sensible heat conversion rate variation of pure water under different flow rate of 400,600,800,1000,1200 L·h^(-1),flash chamber pressure of 7.4,12.3,19.9,31.2 kPa and water film height of 140 to 250 mm.Results showed that variation of sensible heat conversion rate versus inlet superheat existed a minimum value.Sensible heat conversion rate decreased with increasing water film height,but increased with increasing flow rate and flash chamber pressure.

关 键 词：循环闪蒸 纯水 汽化率 显热转化率 

分 类 号：TK124[动力工程及工程热物理—工程热物理]