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R32 在水平微翅片管和三维坑管中的 冷凝传热实验研究

作者:时间:2025-07-04点击数:


全文下载: 7.pdf


文章编号:1672-6987(2025)03-0101-09;DOI:10. 16351/j. 1672-6987. 2025. 03. 014


1 ,程 洪 1 ,吴俊杰 1 ,冯 威 1 ,刘相增 1 ,何 燕 1 ,李 蔚 1,2* (1. 青岛科技大学 机电工程学院,山东 青岛 266061; 2. 浙江大学 能源工程学院,浙江 杭州 310027)


要:实验研究了制冷剂 R32 在光滑管、微翅片管和三维坑管中的冷凝传热性能和流动特

性。实验的饱和温度为 318 K,质量流速的范围 150~400 kg ·(m2 · s)−1 ,干度在 0. 1~0. 8 之 间。结果显示微翅片管的换热系数是光滑管的 1. 5~2. 0 倍,三维强化管的换热系数是光滑管 的 1. 5~1. 7 倍。这得益于强化管的表面结构对流体的扰动和有效换热表面的增加。三维坑 管中的冷凝传热系数在高质量流速下提升明显。摩擦压降随着质量流速的增加而增加。传 热系数随着制冷剂干度的增加而增加。光滑管的流型结果与 Hajal 的流型预测图吻合良好。 强化管对流型的过渡有促进作用,使传热性能得到提升。


关键词:冷凝;强化传热;压降;流型


中图分类号:TK 124 文献标志码:A


引用格式:高宇,程洪,吴俊杰,等 . R32 在水平微翅片管和三维坑管中的冷凝传热实验研究 [J]. 青岛科技大学学报(自然科学版),2025,46(3):101-109.


GAO Yu, CHENG Hong, WU Junjie, et al. Experimental study on condensation heat trans fer of R32 in horizontal micro-finned tube and three-dimensional dimpled tube[J]. Journal of Qingdao University of Science and Technology(Natural Science Edition),2025,46(3): 101-109.


Experimental Study on Condensation Heat Transfer of R32 in Horizontal Micro-Finned Tube and Three-Dimensional Dimpled Tube


GAO Yu1 ,CHENG Hong1 ,WU Junjie1 ,FENG Wei1 ,LIU Xiangzeng1 ,HE Yan1 ,LI Wei1,2 (1. College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China; 2. College of Energy Engineering, Zhejiang University, Hangzhou 310027, China)


Abstract:The condensation heat transfer performance and flow characteristics of refrigerant R32 in smooth tube, micro-finned tube and three-dimensional dimpled tube were studied experimentally. The experimental saturation temperature is 318 K, the mass flow rate is 150— 400 kg ·(m2 · s)−1 , and the vapor quality is 0. 1—0. 8. The results show that the heat transfer coefficient of micro-finned tube is 1. 5—2. 0 times that of smooth tube, and that of threedimensional dimpled tube is 1. 5—1. 7 times that of smooth tube. This is because of the increase in fluid perturbation and effective heat transfer surface by the surface structure of the enhanced tube. The heat transfer coefficient of three-dimensional dimpled tube increases obvi ously at high mass flow rate. The friction pressure drop increases with the increase of mass flow rate. The heat transfer coefficient increases with the increase of vapor quality of refriger ant. The flow pattern of the smooth tube is in good agreement with Hajal's flow pattern predic tion map. Enhanced tubes can promote the transition of flow pattern, which leads to the improvement of heat transfer performance.


Key words:condensation; enhance heat transfer; pressure drop; flow pattern


收稿日期:2024-07-19

基金项目:国家自然科学基金项目(52076187).

作者简介:高 宇(1996—),男,硕士研究生 . 通信联系人 .


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