Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Heat Transfer Performance of Individual Rows in Fin-Tube Heat Exchangers

2열 핀-관 열 교환기의 열별 전열성능 측정

  • 권영철 (선문대학교 기계공학과) ;
  • 정지환 (천안대학교 환경시스템과) ;
  • 장근선 (선문대학교 기계공학과) ;
  • 홍기수 (LG 디지털 어플라이언스 연구소) ;
  • 진심원 (LG 디지털 어플라이언스 연구소)
  • Published : 2004.03.01
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Abstract

An experimental study is peformed to examine the heat transfer performance of individual rows of fin-tube heat exchangers. The heat transfer performance is measured using an air-enthalpy type calorimeter. The examined heat exchangers consist of 7mm tube and fin patterns of them are slit and louver types. Equivalent fin spacings are 18 fins per inch(fpi) for all samples, and the number of tube rows are two. In order to confirm that thermal boundary condition on fins of each row are the same, physically separated between two rows as well as connected heat exchangers are used. The frontal air velocity is varied from 0.7 to 2.5㎧. Heat transfer performance for each row is measured. It is observed that the heat transfer coefficient of the second row is smaller than that of the first row at low Reynolds number while larger at high Reynolds number.

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References

  1. ASHRAE Transaction v.81 The effect of the number of tube rows on heat transfer performance of smooth plate fin-and-tube heat exchanger Rich,D.G.
  2. Int. J. Heat and Mass Transfer v.19 Transfer characteristics of two-row plate fin and tube heat exchanger configurations Saboya,F.E.M.;Sparrow,E.M. https://doi.org/10.1016/0017-9310(76)90009-0
  3. Proceedings of the SAREK Experimental study of pressue drop and that transfer characteristics of 10,07φ wave and wave-slit fin-tube heat exchangers Youn,B.;Kil,Y.H.;Park,H.Y.;Yoo,K.C.;Kim,Y.S.
  4. Proceedings of the SAREK A experimental study on heat and mass transfer of the slit fin Kim,H.Y.;Ha,S.C.;Lee,W.Y.;Kim,C.H.;Yun,J.Y.
  5. ASHRAE Standard 33-78 Methods of testing forced circulation air cooling and air heating coils
  6. Refrigeration v.44 no.502 Effects of mechanical bond between fin and tube on heat transfer Sawai,S.;Hayashi,T.;Ohtake,Y.;Takei,T.
  7. International Chemical Engineering v.16 no.2 New equation for heat and mass transfer in turbulent pipe and channel flow Gnielinski,V.
  8. J. of the ASRE, Refrigerating Engineering v.4 Heat transfer calculations for extended surfaces Schmidt,T.E.
  9. Computers & Fluids v.27 no.1 Some physical insights into a two-row finned tube heat transfer Tsai,S.F.;Sheu,T.W.H. https://doi.org/10.1016/S0045-7930(97)00025-X