微尺度通道内混合物流动沸腾特性研究  

EXPERIMENTAL INVESTIGATION ON BOILING HEAT TRANSFER OF MIXTURE IN MICROCHANNEL TUBE

作　　者：马虎根[1] 胡自成[1] 罗行[1] 李美玲[1] 

机构地区：[1]上海理工大学动力工程学院 上海 200093

出　　处：《机械工程学报》2005年第1期29-32,共4页Journal of Mechanical Engineering

基　　金：上海市重点学科建设基金上海市高等学校科学技术发展基金(01F09)资助项目。

摘　　要：对非共沸混合工质R32／R134a(25％／75％)在微尺度管内的流动沸腾换热特性进行了试验研究。试验结果表明,在较高热流密度下,微尺度管内流动沸腾换热与质量干度和质量流量基本无关,热流密度对换热有着很大的影响,在较宽的热流密度范围内,核态沸腾在换热过程中占据主导地位。和细小管道相比,在相同条件下,微尺度管道内的流动沸腾表面传热系数高于细小管道。Experiments are conducted to investigate the flow boiling heat transfer characteristics of refrigerant mixture of R32 and R134a in microchannel tube and mini-channel tubes. The results show that the mass quality and mass flux have nearly no effects on the flow boiling heat transfer, but the heat flux affectes the flow boiling heat transfer greatly, results also show that nucleation boiling heat transfer dominates over most of the heat flux range. Compared with the mini-scale tube, flow boiling heat transfer in microchannel tube is an effective method of achieving high heat transfer coefficient.

关 键 词：微尺度通道 流动沸腾 非共沸混合工质 

分 类 号：TK124[动力工程及工程热物理—工程热物理]