摘要
通过空气-水传热试验,对平直翅片的流动传热性能进行了研究.试验结果表明,空气流速2.2~5.6 m/s时,翅片间空气侧的对流传热系数为50~141 W/(m^2·℃),流动摩擦压降为40~90 Pa.实现翅片高效换热的空气流速是2.2~3.7 m/s,对应的翅片总效率在0.85~0.92.
Fin structure of plate-fin heat exchanger has a significant influence on air-side heat transfer performance.The fluid flow and heat transfer characteristics of plain fin was obtained by conducting air-water heat transfer experiments.The experimental results shown that the convection heat transfer coefficient of air side was between 50 ~ 141 W/(m^2 · ℃),the range of flow friction pressure drop is 40 ~ 90 Pa.The values of fin total efficiency decrease with the air velocity increase.The high effectiveness of plate-fin can be achieved when air velocity come to the range of 2.2 ~3.7 m/s.The corresponding fin total efficiency between 0.85 ~ 0.92.The results provide the theoretical basis for optimizing structure of plate-fin heat exchangers.
出处
《石油化工设备》
CAS
2014年第5期19-22,共4页
Petro-Chemical Equipment
关键词
板翅式热交换器
平直翅片
传热特性
翅片总效率
plate-fin heat exchanger
flat plain fin
heat transfer characteristics
total fin efficiency