化学工程2024，Vol.52Issue(4)：17-22,6.DOI:10.3969/j.issn.1005-9954.2024.04.004
R513A在水平螺纹管内冷凝换热性能与压降
Condensation heat transfer performance and pressure drop of R513A in horizontal microfin tubes
摘要
Abstract
In order to investigate the condensation heat transfer performance and flow characteristics of R513A in microfin tubes,the condensation heat transfer coefficient and pressure drop of R513A in smooth and microfin tubes with outer diameters of 12.7 mm and 9.52 mm were analyzed experimentally.The experimental conditions were mass fluxes 50-270 kg/(m2·s)and condensation temperatures 33,35,38,40 ℃.The results show that the R513A condensation heat transfer coefficient in the smooth tube is 18.8％-25.5％lower than that of R134a,and the deviation is-5.5％-0.8％in the microfin tube.The condensation heat transfer performance of R513A is enhanced more significantly than that of R134a in the microfin tube.The pressure drop of R513A is 5.6％-17.8％lower than that of R134a.When the tube diameter decreases,the condensation heat transfer coefficient and pressure drop of R513A both increase.The Oliver correlation has the highest prediction accuracy for the tested microfin tube,and the average deviation is about 14.56％.For the prediction of pressure drop,calculated results of selected correlations have large errors with some of the experimental data.The newly fitted correlation well predicts the pressure drop of R513A condensing in the microfin tube,with 95.32％of the data points within 30％error line.关键词
R513A/冷凝/螺纹管/换热系数/压降关联式Key words
R513A/condensation/microfin tube/heat transfer coefficient/pressure drop correlation分类
能源科技引用本文复制引用
路镇阳,黄理浩,陶乐仁..R513A在水平螺纹管内冷凝换热性能与压降[J].化学工程,2024,52(4):17-22,6.基金项目
上海市动力工程多相流动与传热重点实验室窄通道内液膜生成机理研究项目(2019KJFZ201) （2019KJFZ201）
