摘要
强化管材质的导热系数对膜状凝结传热过程具有重要的影响,本文通过实验对比了铝黄铜和白铜两种材料制成的三维高效管和低肋管的凝结传热特性.结果表明对于同种材质的强化管,三维高效管比低肋管强化效果好;当强化管类型相同时,较低导热系数管冷凝管传热系数较低,即铝黄铜的凝结传热强化效果优于白铜。
The thermal conductivity of tube material has a significant effect on heat transfer coemcient of film condensation outside horizontal tube. Experimental studies of film condensation of R404A on single horizontal two- and three-dimensional finned tubes have been conducted. The results indicate that for the same tube material, the condensation heat transfer coefficient of R404A on three-dimensional finned tubes is larger than on two-dimensional finned tubes. And for the same surface structure, the lower thermal conductivity tubes obtain smaller condensation heat transfer coefficient.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2014年第1期132-135,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51136004)
国家重点基础研究(973)项目(No.G2013CB228304)
关键词
R404A
低导热系数
凝结传热
R404A
low thermal conductivity
condensation heat transfer
