单压制冷系统中变截面管气泡泵的实验分析  

Experimental Analysis of a Variable Cross Section Tube Bubble Pump in an Einstein Refrigeration System

作　　者：陈永军[1] 刘道平[1] 赵荣祥[1] 陆引哲[1] 

机构地区：[1]上海理工大学制冷技术研究所,上海200093

出　　处：《热能动力工程》2014年第6期671-675,759,共5页Journal of Engineering for Thermal Energy and Power

基　　金：上海市教育委员会科研创新项目资助(13ZZ117);上海市研究生创新基金项目(JWCXSL1302)

摘　　要：为了拓宽气泡泵研究领域和应用范围,解决气泡泵效率低,未有效利用低品位能源等问题,提出了一种新型的连续渐缩式变截面管(内径从11 mm渐变至8 mm)气泡泵装置,并对其提升性能进行实验分析。以常压100℃水为工质,研究不同加热功率,浸没比对液体提升率的影响,并与内径为10、9 mm的直管气泡泵提升性能进行对比分析。结果表明:在加热功率为200-650 W,沉浸比为0.4时,变截面管气泡泵提升率最高可提高8.2%,说明变截面管气泡泵具有较高提升优势,且该加热功率相对较低,可充分与低品位热源衔接,对扩大能源的利用范围及单压制冷机性能的提高具有重要意义。In order to broaden the domain under investigation in bubble pumps and their application range and solve the problems concerning the low efficiency of bubble pumps and ineffective utilization of low grade energy sources etc.,proposed was a novel continuous converging type variable cross section tube( the inner diameter gradually changes from 11 mm to 8 mm) bubble pump device and experimental analysis was made of its lifting performance.With water at a normal pressure and the temperature of 100 ℃ serving as the working medium,the influence of various heating powers and immersing ratios on the lifting efficiency of a liquid was studied.Moreover,the lifting performance of the variable cross section tube bubble pumps was contrasted with those of straight tube bubble pumps having an inner diameter of 10 mm and 9 mm.It has been found that when the heating power falls in a range from 200 to 650 W and the immersing ratio is 0.4,the lifting efficiency of the variable cross section tube bubble pump can increase by8.2% at the most outside,indicating that the variable cross section tube bubble pump boasts a relatively high lifting edge and the heating power is relatively low,capable of fully accommodating to low grade heat sources and having an importance significance for expanding the scope for utilizing energy sources and enhancing the performance of Einstein refrigerating machines.

关 键 词：单压制冷循环 气泡泵 变截面管 提升率 

分 类 号：TB61[一般工业技术—制冷工程] TK511[动力工程及工程热物理—热能工程]