Theoretical and Experimental Analysis of Heat Transfer and Condensation in Micro-Ribbed Tubes  

作　　者：Daoming Shen Jinhong Xia Chao Gui Songtao Xue 

机构地区：[1]Xinxiang University,Xinxiang,453000,China [2]Department of Architecture,Tohoku Institute of Technology,Sendai,982-8577,Japan

出　　处：《Fluid Dynamics & Materials Processing》2023年第6期1411-1424,共14页流体力学与材料加工（英文）

基　　金：supported by the National Natural Science Foundation of China(No.41877251);Major Science and Technology Projects of Xinxiang City(No.21ZD012).

摘　　要：The thermal transmission coefficient for a micro-ribbed tube has been determined using theoretical relationships and the outcomes of such calculations have been compared with experiments conducted using a R1234yf refrigerant undergoing condensation.In particular four theoretical single-phase flow and three multi-phase flow models have been used in this regard.The experimental results show that:the Oliver et al.criterion equation overestimates the experimental results as its accuracy is significantly affected by the specific conditions realized inside micro-fin tubes;the Miyara et al.criterion equation prediction error is less than 15%;the Cavallini et al.approach gives the highest prediction accuracy;the Goto et al.model overestimates the test data.Such results are critically discussed and some indications for the improvement of such models are provided.

关 键 词：Micro-ribbed tube flow condensation thermal transmission coefficient dimensionless criterion equation 

分 类 号：TB3[一般工业技术—材料科学与工程]