Study on the heat transfer of cross flow in vertical upward tubes

• Published in: Journal of Zhejiang University. A. Science Vol. 6; no. 10; pp. 1128 - 1131
• Main Author: 胡志华 杨燕华 周芳德
• Format: Journal Article
• Language: English
• Published: School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China%State Key Laboratory of Multiphase Flow, Xi'an Jiaotong Univeristy, Xi'an 710049, China 01.10.2005
• Subjects: 交叉流程; 热传递; 电子管; 空间容量; 表面传递速度; Upward; Heat transfer; Cross flow
• ISSN: 1673-565X; 1862-1775
• DOI: 10.1631/jzus.2005.A1128

A special device was designed to measure temperature difference in this study of heat transfer of water and oil cross flow inside vertical upward tubes. A new heat transfer correlation was obtained for cross flow. The experimental results showed that the dependence of heat transfer on Reynolds is much smaller in a narrow space than that in a wide space. It was found that the heat transfer correlation of cross flow in a narrow space is obviously different from that in a wide space, and that the heat transfer correlation obtained in a wide space may not be applicable to the cross-flow heat transfer in a narrow space. Further, the sin- gle-phase heat transfer capability of water cross flow＇ was compared with that ofoil cross flow. The experimental results showed that the average heat transfer coefficient of water is about 2-3 times that ofoil when they have the same superficial velocity.