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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Computation of Compact Heat Exchanger Performance by the Heat Exchangelet Method : Effect of Tube-to-tube Conduction along the Fin

미소열교환기법에 의한 밀집형 열교환기의 성능 계산 : 핀을 통한 튜브간 전도의 영향

  • 성시경 (한국과학기술원 기계공학과) ;
  • 송태호 (한국과학기술원 기계공학과) ;
  • 최영철 (한국과학기술원 기계공학과)
  • Published : 2000.05.01
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Abstract

Effectiveness of a 3-pass plate finned-tube heat exchanger is calculated using heat exchangelet method by changing the shape of fin and the arrangement of tubes. The alternative refrigerant R134a is taken in this study. Conduction between neighboring tubes along the fin is taken into account in addition to convection between the fin and the surrounding air. Governing equations are obtained by using energy balance in a small control volume containing a tube and fins. They are numerically solved following the tube. Effect of tube-to-tube conduction is investigated in single-phase and two-phase flows with various fin shapes and arrangements of tubes. Improvement of effectiveness by fin perforation is studied too. The results shows that perforating fins, increasing the number of tubes, and increasing the distance between neighboring tubes at the same fin area enhance the effectiveness.

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References

  1. Effectiveness of serpentine type heat exchanger with interconduction through fin and without phase change Kim, C. M
  2. DTI Energy Technology Recent Developments in Finned Tube Heat Exchangers Theoretical and Practical Aspects Auracher, A.;Baggio, P.;Cavallini, A.;Fornasieri, E.;Longo, G. A.;Marvilet, C.
  3. Principles of Enhanced Heat Transfer Webb. R. L.
  4. SAE Paper no.900722 The Flow Structure in the Louvered Fin Heat Exchanger Geometry Webb, R. L.
  5. Int. J. Heat Mass Transfer v.39 no.2 Fin efficiency and mechanisms of heat exchange through fins in multi-stream plate-fin heat exchanger: formulation Prasad, B. S. V.
  6. Proceedings, 10th International Heat Transfer Conference v.2 Improvement of a capacity of a plate fin tubed heat exchanger by thermal analysis considering thermal interaction between pipes by heat conduction in fins Kaga, K.;Yamada, K. S.;Takeshida, M;Yamanaka, G.
  7. Korean Journal of Air-Conditioning and Refrigeration Engineering v.11 no.3 Numerical investigation of plate fin performance for a compact heat exchanger Yoo, J. W.;Song, T. H.
  8. Int. J. Heat Mass Transfer v.22 A general correlation for heat transfer during film condensation inside pipes Shah, M. M.