Study on the heat transfer characteristics of the annular fin under dry-surface, partially wet-surface, and fully wet-surface conditions☆

In the present study, theoretical results of the heat transfer characteristics and the fin efficiency of the annular fin are presented. Annular fin under dry-surface conditions, partially wet-surface conditions, and fully wet-surface conditions are investigated. The mathematical models based on the conservation equations of energy and mass are developed and solved by the central finite difference method to obtain temperature distribution along the fin. Effects of inlet condition of working fluids and the fin dimensions on the heat transfer characteristics and fin efficiency are considered. The results obtained from the model are validated by comparing with those obtained from the other researchers. There is a reasonable agreement between the results obtained from the present model and those obtained from the other model.

[1]  R. Webb,et al.  Calculation of Fin Efficiency for Wet and Dry Fins , 1996 .

[2]  L. Rosario,et al.  Analysis of heat transfer in a partially wet radial fin assembly during dehumidification , 1999 .

[3]  H. Kazeminejad.  Analysis of one-dimensional fin assembly heat transfer with dehumidification , 1995 .

[4]  R. Shah,et al.  Fin efficiency of extended surfaces in two-phase flow , 1997 .

[5]  S. Y. Liang,et al.  Comparison of one-dimensional and two-dimensional models for wet-surface fin efficiency of a plate-fin-tube heat exchanger , 2000 .

[6]  Balaram Kundu.  An analytical study of the effect of dehumidification of air on the performance and optimization of straight tapered fins , 2002 .

[7]  S. Ramadhyani,et al.  Prediction of cooling-coil performance under condensing conditions , 1993 .

[8]  S. Thombre,et al.  Turbulent flow heat transfer and friction factor characteristics of shrouded fin arrays with uninterrupted fins , 1995 .

[9]  C. Sheppard,et al.  Fin performance with condensation from humid air: a numerical investigation , 1989 .

[10]  Muhammad M. Rahman,et al.  Overall Efficiency of a Radial Fin Assembly Under Dehumidifying Conditions , 1998 .

[11]  D. P. Sekulic,et al.  Extended surface heat transfer , 1972 .

[12]  Esmail M. A. Mokheimer,et al.  Performance of annular fins with different profiles subject to variable heat transfer coefficient , 2002 .

[13]  M. M. Salah El-Din.  Performance analysis of partially-wet fin assembly , 1998 .

[14]  Jerald D. Parker,et al.  Heating, ventilating, and air conditioning , 1980 .