制冷学报2018，Vol.39Issue(1)：48-55,8.DOI:10.3969/j.issn.0253-4339.2018.01.048
R404A在小管径管内流动沸腾换热特性研究
Study on Flow Boiling Heat Transfer Characteristics of R404A in Small-diameter Tubes
摘要
Abstract
The flow boiling heat transfer process of R404A in small-diameter tubes is a very complex physical phenomenon.At present,research on the heat transfer characteristics of R404A is mostly focused on large-diameter tubes,and there has been little research on small-diameter tubes,despite the different mechanisms underlying the experimental phenomena.Therefore,there is a strong need for specific experimental data to support the theoretical study of the heat transfer characteristics of R404A in small-diameter tubes.An experimental platform for evaporation in small-diameter micro-fin copper tubes was constructed,and the effects of heat flux,evaporation quality,mass flux,and saturation temperature on the heat transfer coefficient in the process of R404A flow boiling heat transfer was investigated.Each factor was studied independently,with all variables other than the particular one under consideration held constant throughout the analysis.The research results shows that the heat flux,quality,mass flux,and saturation temperature all have a significant influence on the heat transfer characteristics of R404A in small-diameter tubes,with the effects of these factors varying before and after dryout.Furthermore,these factors have a direct influence on the initial quality of dryout,the main form of heat transfer,and the occurrence of dryout.关键词
小管径/沸腾换热特性/干涸/R404AKey words
small diameter tube/boiling heat transfer characteristics/dryout/R404A分类
通用工业技术引用本文复制引用
王学东,柳建华,韩赛赛..R404A在小管径管内流动沸腾换热特性研究[J].制冷学报,2018,39(1):48-55,8.基金项目
本文受上海市科委建设项目(13DZ2260900)资助.(The project was supported by the Construction Project of Shanghai Science and Technology Committee (No.13DZ2260900).) （13DZ2260900）
