Numerical simulation on flow and heat transfer of fin structure in air-cooled heat exchanger

Abstract Fin-and-tubes as compact heat exchangers are primarily used in direct air-cooled condensers systems in power plants. Air-side flow and heat transfer characteristics of the fin-and-tubes play an important role in the performance of the condensers. In the present study, wavy fin configuration was proposed to improve the air cooling capacity. Investigation on heat transfer and pressure drop characteristics of fin-and-tubes with three kinds of different but closely related air-side fin configurations were made by numerical simulation. The effectiveness of air-side convergent–divergent channel in wavy fins was compared to straight channel in plain fins or continuous plain fins. The total heat transfer and pressure drop performances were assessed over a Reynolds number range based on hydraulic diameter of 440

[1]  E. Sparrow,et al.  Effect of interwall spacing and fluid flow inlet conditions on a corrugated-wall heat exchanger , 1983 .

[2]  Yong-Heng Zhang,et al.  Comparison of heat transfer performance of tube bank fin with mounted vortex generators to tube bank fin with punched vortex generators , 2008 .

[3]  T. Newell,et al.  An experimental study of flow and heat transfer in sinusoidal wavy passages , 1999 .

[4]  Y. Islamoğlu,et al.  Numerical investigation of convective heat transfer and pressure drop in a corrugated heat exchanger channel , 2004 .

[5]  Qun Chen,et al.  Field synergy equation for turbulent heat transfer and its application , 2007 .

[6]  T. Nishimura,et al.  MASS TRANSFER ENHANCEMENT IN CHANNELS WITH A WAVY WALL , 1986 .

[7]  Nishimura Tatsuo,et al.  Flow observations and mass transfer characteristics in symmetrical wavy-walled channels at moderate Reynolds numbers for steady flow , 1990 .

[8]  A. Guzmán,et al.  Dynamical flow characterization of transitional and chaotic regimes in converging–diverging channels , 1996, Journal of Fluid Mechanics.

[9]  Wen-Quan Tao,et al.  Field synergy principle for enhancing convective heat transfer--its extension and numerical verifications , 2002 .

[10]  T. Nishimura,et al.  Flow characteristics in a channel with symmetric wavy wall for steady flow. , 1984 .

[11]  E. Sparrow,et al.  Corrugated-Duct Heat Transfer, Pressure Drop, and Flow Visualization , 1982 .

[12]  Pablo E. Araya,et al.  Heat transfer enhancement by flow bifurcations in asymmetric wavy wall channels , 2009 .

[13]  T. Nishimura,et al.  Mass transfer characteristics in a channel with symmetric wavy wall for steady flow. , 1985 .

[14]  Anthony M. Jacobi,et al.  Heat transfer enhancement by winglet-type vortex generator arrays in compact plain-fin-and-tube heat exchangers , 2008 .

[15]  Junqi Dong,et al.  Experimental and numerical investigation of thermal -hydraulic performance in wavy fin-and-flat tube heat exchangers , 2010 .

[16]  XinGang Liang,et al.  Entransy—A physical quantity describing heat transfer ability , 2007 .

[17]  Bu-Xuan Wang,et al.  A novel concept for convective heat transfer enhancement , 1998 .

[18]  Chi-Chuan Wang.  On the heat and mass analogy of fin-and-tube heat exchanger , 2008 .

[19]  Chi-Chuan Wang,et al.  A comparative study of compact enhanced fin-and-tube heat exchangers , 2001 .

[20]  Chi-Chuan Wang,et al.  Air-side performance of herringbone wavy fin-and-tube heat exchangers under dehumidifying condition – Data with larger diameter tube , 2012 .

[21]  Rui Li,et al.  Three-dimensional numerical study on fin-and-oval-tube heat exchanger with longitudinal vortex generators , 2009 .

[22]  Anthony M. Jacobi,et al.  Air-side heat transfer enhancement of a refrigerator evaporator using vortex generation , 2005 .

[23]  Anthony M. Jacobi,et al.  Impact of leading edge delta-wing vortex generators on the thermal performance of a flat tube, louvered-fin compact heat exchanger , 2005 .

[24]  S. Vanka,et al.  Convective heat transfer in periodic wavy passages , 1995 .

[25]  Ning Pan,et al.  Optimization principles for convective heat transfer , 2009 .

[26]  XinGang Liang,et al.  Field synergy optimization and enhanced heat transfer by multi-longitudinal vortexes flow in tube , 2005 .

[27]  E. Sparrow,et al.  Heat/mass transfer characteristics for flow in a corrugated wall channel. , 1977 .