化工学报2016，Vol.67Issue(z1)：28-32,5.DOI:10.11949/j.issn.0438-1157.20160706
高热通量水平管外池沸腾传热
Pool boiling heat transfer outside horizontal tubes at higher heat flux
摘要
Abstract
For the flooded evaporator in refrigeration or air conditioning systems,refrigerant is boiling on the shell side and water is flowing in the tube side.The pool boiling heat transfer coefficient of R134a outside one smooth tube and one reentrant cavity enhanced tube No.1 is investigated with an experimental approach.At the saturate temperature of 6,10 and 16℃,the heat flux of 10-250 kW · m-2,the heat transfer coefficient versus heat flux of smooth tube is investigated and compared with Cooper correlation.The external diameter of smooth tube and enhanced tube are 15.93 mm and 25.36 mm,respectively.At the heat flux of 10-250 kW · m-2,it is found that the deviation of experimental result and Cooper correlation is within ± 15％.the average value of m in h ∝qm,is 0.67.For the enhanced tube,the enhanced ratio is the largest at the heat flux less than 40 kW · m-2.The enhanced ratio is decreasing as the increment of heat flux.At the heat flux larger than 250 kW · m-2,the heat transfer coefficient of enhanced tube is approaching the smooth tube,and even smaller than smooth tube.关键词
池沸腾/热通量/饱和温度/传热系数/强化管Key words
pool boiling/heat flux/saturate temperature/heat transfer coefficient/enhanced tube分类
能源科技引用本文复制引用
冀文涛,张定才,赵创要,何雅玲,陶文铨..高热通量水平管外池沸腾传热[J].化工学报,2016,67(z1):28-32,5.基金项目
国家自然科学基金项目(51306140) （51306140）
高等学校博士学科点专项科研基金项目(20130201120057).supported by the National Natural Science Foundation of China (51306140) and the Research Fund for the Doctoral Program of Higher Education of China (20130201120057). （20130201120057）
