图书馆订阅: Guest
Begell Digital Portal Begell 数字图书馆 电子图书 期刊 参考文献及会议录 研究收集
强化传热期刊
影响因子: 0.562 5年影响因子: 0.605 SJR: 0.175 SNIP: 0.361 CiteScore™: 0.33

ISSN 打印: 1065-5131
ISSN 在线: 1026-5511

强化传热期刊

DOI: 10.1615/JEnhHeatTransf.2018020367
pages 465-485

FLOW AND HEAT TRANSFER CHARACTERISTICS OF A FIN-AND-TUBE HEAT EXCHANGER WITH WAVY RIB INSERTS

Li Li
MOE Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Beijing 102206, China
Xiaoze Du
North China Electric Power University
Lijun Yang
MOE Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Beijing 102206, China
Yongping Yang
MOE Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Beijing 102206, China
Gaosheng Wei
MOE Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Beijing 102206, China

ABSTRACT

Heat transfer is enhanced when the plain fins are redesigned into wavy fins with variable cross-sections along the flow stream. However, the increased pressure drop in the air side of the fin-and-tube heat exchangers leads to lower overall performance, which is a shortcoming in configuring the wavy fins. In the present study, inserted wavy ribs on the base of plain fins were proposed for the purpose of obtaining balance between enhanced heat transfer and increased pressure drop. The heat transfer performance and pressure drop were numerically investigated. The simulation results showed that the Nusselt numbers increased up to 40% for inserted wavy ribs on plain fins compared to the channel without the insert. The side effect of increased pressure drop was not significant, leading to the considerable overall performance of heat transfer. The various cross-sections formed by wavy inserts contribute to the disturbance of fluid flow. The heat transfer enhancement could be explained by the decrease in synergy angle between flow velocity and temperature gradient on the wavy surface. Additionally, the angle, number, and length of the wavy inserts are other factors leading to the contradiction between enhanced heat transfer and increased pressure drop.


Articles with similar content:

CONDENSATION HEAT TRANSFER AND PRESSURE DROP OF R-410A IN THREE 7.0MM OUTER DIAMETER MICROFIN TUBES HAVING DIFFERENT INSIDE GEOMETRIES
Journal of Enhanced Heat Transfer, Vol.20, 2013, issue 3
H. W. Byun, J. K. Lee, Nae-Hyun Kim
EFFECT OF MICRO-FIN GEOMETRY ON LIQUID HEAT TRANSFER RATE AND PRESSURE DROP
4th Thermal and Fluids Engineering Conference, Vol.19, 2019, issue
Steven J. Eckels, Shima Soleimani
NUMERICAL STUDY ON HEAT TRANSFER ENHANCEMENT AND FLOW STRUCTURE IN A TUBE WITH CENTRAL SLANT DEFLECTOR
International Heat Transfer Conference 16, Vol.14, 2018, issue
Peng Liu, Zhichun Liu, Jinyi Lv, Wei Liu
THE EFFECT OF TRANSVERSE TUBE PITCH ON THE THERMAL-HYDRODYNAMIC PERFORMANCE OF A CIRCULAR TUBE-PLATE-FIN HEAT EXCHANGER WITH FIN-MOUNTED VORTEX GENERATORS
Journal of Enhanced Heat Transfer, Vol.22, 2015, issue 3
Wan-Ling Hu, Yong Guan, Liang-Bi Wang
AIR-SIDE HEAT TRANSFER AND PRESSURE DROP FOR ELLIPTICAL TUBES WITH MODIFIED FINS IN A CONFINED CHANNEL
Journal of Enhanced Heat Transfer, Vol.26, 2019, issue 5
Kieran J. Wolk, Vijay K. Dhir