Summary
In this paper, 3-D numerical simulations were performed for laminar heat transfer and fluid flow characteristics of wavy fin-and-tube heat exchanger by body-fitted coordinates system. The effect of four factors were examined: Reynolds number, fin pitch, wavy angle and tube row number. The Reynolds number based on the tube diameter varied from 500 to 5000, the fin pitch from 0.4 to 5.2 mm, the wavy angle from 0° to 50°, and the tube row range from 1 to 4. The numerical results were compared with experiments and good agreement was obtained. The numerical results show that with the increasing of wavy angles, decreasing of the fin pitch and tube row number, the heat transfer of the finned tube bank are enhanced with some penalty in pressure drop. The effects of the four factors were also analyzed from the view point of field synergy principle which says that the reduction of the intersection angle between velocity and fluid temperature gradient is the basic mechanism for enhance convective heat transfer. It is found that the effects of the four factors on the heat transfer performance of the wavy fin-and-tube exchangers can be well described by the field synergy principle. [Reprinted with permission from Elsevier. Copyright, 2006].
Details
- Original title: Three-dimensional numerical study of wavy fin-and-tube heat exchangers and field synergy principle analysis.
- Record ID : 2007-1464
- Languages: English
- Source: International Journal of Heat and Mass Transfer - vol. 50 - n. 5-6
- Publication date: 2007/03
Links
See other articles in this issue (6)
See the source
Indexing
- Themes: Heat transfer
- Keywords: Geometry; Finned tube; Heat transfer; Simulation; Modelling; Laminar flow; Heat exchanger
-
Effect of fin thickness on flow and heat-transf...
- Author(s) : XI G., HAGIWARA Y., SUZUKI K., KANEDA T.
- Date : 1992
- Languages : English
- Source: Heat Transf., Jap. Res. - vol. 21 - n. 1
View record
-
Numerical study of laminar heat transfer in int...
- Author(s) : KETTNER I. J., DEGANI D., GUTFINGER C.
- Date : 1991
- Languages : English
- Source: Numer. Heat Transf., A - vol. 20 - n. 2
View record
-
Numerical simulation for natural convection in ...
- Author(s) : WANG X., PEPPER D. W.
- Date : 2009/08
- Languages : English
- Source: International Journal of Heat and Mass Transfer - vol. 52 - n. 17-18
View record
-
A numerical study of laminar convective heat tr...
- Author(s) : LI Z., TAO W. Q., HE Y. L.
- Date : 2006/12
- Languages : English
- Source: International Journal of thermal Sciences - vol. 45 - n. 12
View record
-
Three-dimensional optimisation of staggered fin...
- Author(s) : MATOS R. S., LAURSEN T. A., VARGAS J. V. C., et al.
- Date : 2004/05
- Languages : English
- Source: International Journal of thermal Sciences - vol. 43 - n. 5
View record