化工学报2019，Vol.70Issue(12)：4575-4581,7.DOI:10.11949/0438-1157.20190574
CO2管内流动沸腾干涸特性研究
Study of dry-out characteristics of carbon dioxide during flow boiling in tube
摘要
Abstract
CO2 is considered to be an ideal alternative refrigerant with good environmental properties and excellent thermodynamic properties. Compared with the traditional refrigerant, the flow boiling heat transfer characteristics of CO2 is very different that the heat transfer deterioration and dry-out will make its capability of heat transfer decrease dramatically. It is of much concern to predict the dry-out point precisely when CO2 flow boiling in tube. However, the existing dry-out point prediction formula fitted is mostly based on their own experimental data. The predicted results of the correlation are biased because of too few data and the limited range of variable parameters. Therefore, by organizing and analyzing 4986 experimental data points collected from 17 articles, the influence of several factors such as mass flow rate, heat flux, saturated temperature and pipe diameter on the dry-out point has been found. And a formula for predicting dry-out points is given by fitting the data points respectively according to the pressure, 90% of the data points has a deviation of less than 15%. The prediction accuracy is greatly improved and it has a great agreement with experiment data. The formula is of great significance to the prediction of dry-out points and the prevention of heat transfer deterioration.关键词
二氧化碳/流动/蒸发/干涸/关联式Key words
carbon dioxide/ flow/ evaporation/ dry-out/ correlation分类
能源科技引用本文复制引用
刘忠彦,逯玮,金旭,孙大汉,张俊博,王晨..CO2管内流动沸腾干涸特性研究[J].化工学报,2019,70(12):4575-4581,7.基金项目
吉林市科技发展创新项目(201750214) （201750214）
吉林省重点科技研发项目(20180201006SF) （20180201006SF）
