论文部分内容阅读
螺旋隔板是强化管壳式换热器壳侧传热十分有效的壳程结构型式。以现场的压缩空气为工质 ,分别对花瓣状翅片管 (以下简称为 PF管 )与低肋管在螺旋隔板支承下的传热与流阻性能进行实验研究。结果表明 ,花瓣状翅片管比低肋管具有更优越的传热性能 ,在同等的 Re下 ,PF管螺旋隔板换热器的壳侧传热系数比低肋管螺旋隔板换热器高出 40 %～ 60 % ,而且其压力损失比低肋管低 30 %～ 40 %。此外还与光滑管螺旋隔板和弓形隔板换热器进行对比
Spiral baffle is to strengthen shell and tube heat exchanger shell side heat transfer shell shell structure is very effective. The field heat transfer and flow resistance performance of the petal-like finned tube (hereinafter referred to as PF tube) and the low-ribbed tube under the helical diaphragm support were investigated by using the compressed air in the field as the working fluid. The results show that the petal-like finned tube has more excellent heat transfer performance than the low-finned tube. Under the same Re, the shell-side heat transfer coefficient of the spiral tube separator is lower than that of the low- Higher than 40% to 60%, and its pressure loss lower than low rib tube 30% to 40%. In addition, smooth tube spiral partition and bow-shaped partition heat exchanger are compared