化学工程2024，Vol.52Issue(5)：53-58,78,7.DOI:10.3969/j.issn.1005-9954.2024.05.009
多结构强化管换热特性的实验研究
Experimental study on heat transfer performance of enhanced tubes with various structures
摘要
Abstract
Based on a single tube heat transfer experimental system,the heat transfer mechanisms of smooth tubes and double-sided enhanced tubes were studied.The Gnielinski formula and thermal resistance separation method were used to calculate the heat transfer coefficients inside and outside the tubes for four types of enhanced heat transfer structures,and numerical simulations were conducted on the condensation process outside the smooth tubes.The results show that the simulation results of condensed liquid smooth tube are within 15％of the experimental results,which can better present the condensation process.EX3 enhanced tube has an average total heat transfer coefficient increased by 207.02％,with the best improvement effect.Compared with trapezoidal fin,triangular fin has a greater disturbance effect on water flow,and the convection heat transfer coefficient inside the tube is better.EX3 tube exhibits the best external enhancement condensation heat transfer performance.At the same time,the condensation heat transfer performance of the integrated ribbed tube with grooves is stronger than that of the three-dimensional enhanced tube,and the condensation performance of the nearly rectangular micro-ribbed enhanced tube is better than that of the nearly T-shaped micro-ribbed tube.There is an optimal rib spacing that maximizes the condensation heat transfer effect of the enhanced tube.Based on experimental data,the correlation between EX3 and EX4 was fitted,and the error is within±20％,which is consistent with expected reliability.关键词
水平单管/强化换热/强化结构/换热机理/换热系数Key words
horizontal single-pipe/enhanced heat transfer/enhanced structure/heat transfer mechanism/heat transfer coefficient引用本文复制引用
钱含琪,黄理浩,陈建红,陶乐仁..多结构强化管换热特性的实验研究[J].化学工程,2024,52(5):53-58,78,7.基金项目
上海市动力工程多相流动与传热重点实验室资助项目(2019KJFZ201) （2019KJFZ201）
