摘要
用实验的方法研究了水平螺旋管管外有纵向Ｖ型槽时的凝结换热的强化问题．在相同的真空度下，测试了当Ｖ型槽的角度改变或槽的数目变化时管外凝结换热系数随冷却水流量变化的规律，并将Ｖ型槽水平螺旋管与矩形槽水平螺旋管及水平螺旋光管的传热效果作了比较．实验结果表明，Ｖ型槽槽深为１ｍｍ、槽数为２８、夹角为６０°时，强化效果最佳；其换热系数是矩形槽管的４～７倍。
Studied is the enhanced condensation heat transfer of horizontal coil tube with longitudinal “V” type grooves. The vacuum is kept unchanged to exclude the influence of air on condensation. The heat transfer coefficients of coil tubes with V grooves of different angle and number are measured. Compared with bare coil tube, the V grooved tube has better heat transfer characteristics and the results show that the best structure is 28 grooves with a depth h =1mm and angle =60°. The highest heat transfer coefficient of the V grooves coil tube is 4～7 times that of the tube with rectangle grooves and 8 times that of the bare coil tube.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1999年第7期62-65,共4页
Journal of Xi'an Jiaotong University
关键词
水平螺肇管
凝结换热
强化传热
螺旋管
V型槽
horizontal coil tube
condensation heat transfer
enhanced heat transfer
experimental study
