混合制冷剂在微肋管内流动沸腾的换热关系式  

Boiling Heat Transfer Correlations for Refrigerant Mixtures Flowing Inside Micro-Fin Tubes

作　　者：张小艳[1] 张兴群[1] 陈蕴光[1] 袁秀玲[1] 

机构地区：[1]西安交通大学能源与动力工程学院

出　　处：《西安交通大学学报》2007年第11期1279-1283,共5页Journal of Xi'an Jiaotong University

摘　　要：基于作者以前研究得到的三元非共沸混合制冷剂R417A在水平光滑管和2种不同几何参数的内螺纹管中流动沸腾换热的实验结果,应用R417A在光滑管内的实验数据对Kattan模型进行修正,并通过在修正-Kattan模型中引入强化因子,发展了一个混合制冷剂在微肋管内流动沸腾的换热关系式.计算结果与实验结果比较表明:该关系式能很好地预测混合制冷剂在不同的内螺纹管中流动沸腾时的换热系数,当干度小于80%时,预测偏差基本集中在±30%的范围之内.Based on the experimental results from the authors＇ previous study on ternary nonazeo-tropic refrigerant mixture R417A flowing and boiling in one smooth and two internally grooved horizontal tubes with different geometrical parameters, a boiling heat transfer correlations was developed for refrigerant mixtures flowing inside micro-fin tubes by applying the enhancement factor in the present modified-Kattan model, which was modified by the experimental data of R417A in a smooth tube. The comparison of the calculation and the experimental results indicates that the prediction by the present correlations is in good agreement with the experiment of refrigerant mixtures inside deferent micro-fin tubes with a standard deviation of ±30% for vapor qualities below 80 %.

关 键 词：R417A 沸腾 微肋 换热关系式 

分 类 号：TK172[动力工程及工程热物理—热能工程]