微翅管几何参数对混合工质流动沸腾特性的影响  

Effects of geometry parameters of microfin tubes on flow boiling of refrigerant mixtures

作　　者：周奕[1] 刁永飞[1] 马虎根[1] 伍贻文[1] 张春明[2] 

机构地区：[1]上海理工大学动力工程学院,上海200093 [2]江苏萃隆铜业有限公司,常熟215562

出　　处：《上海理工大学学报》2005年第4期331-335,共5页Journal of University of Shanghai For Science and Technology

摘　　要：对非共沸混合工质R32/R134a在水平微翅管内的流动沸腾特性进行了实验研究,获得了微翅管的翅高和翅数对换热性能的影响,并综合比较了3根微翅管的换热性能.同时,将微翅管与光管性能进行了比较.结果表明,在相同工况下,翅高为0.2 mm、翅数为60的换热性能最好;微翅管的换热性能明显优于光管.Flow boiling characteristics of nonazeotropic mixture of R32/R134a inside microfin tubes were investigated experimentally to obtain the effects of fin height and fin number on heat transfer characteristics of nonazeotropic mixture. Heat transfer performances of three microfin tubes with different geometry parameters were analyzed comprehensively. At thesame time, the comparisons between the coefficients of microfin tubes and smooth tube were made. Among the three kinds of microfin tubes, the microfin tube, whose fin height is 0.2 mm, and fin nomber is 60,is found harvning the optimal heat transfer characteristics. Hearvt trensfer performances of microfin tubes are better than that of smoth tube obviously.

关 键 词：非共沸混合工质 水平微翅管 流动沸腾 

分 类 号：TK124[动力工程及工程热物理—工程热物理]