Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Beat Transfer Characteristics in the Air Side of Large-scaled Heat Exchanger

확대모형 열교환기를 이용한 공기측 열전달 성능에 관한 연구

  • 변주석 (연세대학교 대학원 기계공학과) ;
  • 이진호 (연세대학교 기계공학부) ;
  • 홍만기 (연세대학교 대학원 기계공학과) ;
  • 전창덕 (충주대학교 기계공학과)
  • Published : 2005.09.01
Download PDF
⟨ Previous Next ⟩

Abstract

This study is performed to investigate the heat transfer characteristics of heat exchanger according to the arrangement of fins as well as fin configuration by using the four times enlarged model. Friction factor, Colburn j factor and goodness factors are compared to each other to estimate performance of each case for 4 different kinds of fins, which are plain, single side slit, double side slit and louver fin. Results show that heat transfer would be altered by fin arrangement and that friction loss is more affected by fin configurations than by the fin arrangements. In particular, heat transfer depends more on the shape of front row than that of rear row. The heat transfer rate of combined fin arrangement increases a lot more under the same pressure drop than that of conventional fin arrangement. This indicates that the heat exchanger of higher efficiency would be designed by the proper combination of fins, of different shapes.

Keywords

References

  1. Rich, D.G., 1973, 'Effect of Fin Spacing on the Heat Transfer and Friction Performance of Multi Row, Smooth Plate Fin-and-Tube Heat Exchangers,' ASHRAE Trans., Vol. 79, No. 2, pp. 135-145
  2. Rich, D.G., 1975, 'Effect of the Number of Tubes Rows on Heat Transfer Performance of Smooth Plate Fin-and Tube Heat Exchangers,' ASHRAE Trans., Vol. 81, No. 1, pp. 307-317
  3. McQuiston, F.C., 1978, 'Heat, Mass and Momentum Transfer Data for Five Plate-Finned-Tube Heat Transfer Surfaces,' ASHRAE Trans., Vol. 84, No. 1, pp. 266-293
  4. McQuiston, F.C., 1978, 'Correlation of Heat, Mass and Momentum Transport Coefficients for Plate-Finned-Tube Heat Transfer Surfaces,' ASHRAE Trans., Vol. 84, No. 1, pp. 294-308
  5. Gray, D.L. and Webb, R.L., 1986, 'Heat Transfer and Friction Correlations for Plate Finned-Tube Heat Exchangers Having Plain Fins,' in. Proc. 8th Heat Transfer Conference, pp. 2745-2750
  6. Wang, C.C., Hsieh, Y.C., Chang, Y.J. and Lin, Y.T., 1996, 'Sensible Heat and Friction Characteristics of Plate Fin-and-Tube Heat Exchangers Having Plate Fins,' Int. J. Refrig., Vol. 19, No. 4, pp. 223~230 https://doi.org/10.1016/0140-7007(96)00021-7
  7. Kays, W.M. and London, A.L., 1984, 'Compact Heat Exchangers,' 3rd ed., McGrow-Hill
  8. Davenport, C.J., 1983, 'Correlations for Heat Transfer and Flow Friction Characteristics of Louvered Fin,' Heat Transfer-Seattle 1983 AIChE Symp. Ser., Vol. 79, No. 225, pp. 19-27
  9. Jeon, C.D., Hong, J.T. and Lee, J., 1996, 'Experimental Study of Heat Transfer Characteristics in the Louvered-Fin Type Heat Exchanger,' Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 8, No. 1
  10. Chang, Y. J. and Wang, C. C., 1997, 'A Generalized Heat Transfer Correlation for Louvered Fin Geometry,' Int. J. Heat Mass Transfer, Vol. 40, No. 3, pp. 533-544 https://doi.org/10.1016/0017-9310(96)00116-0
  11. Du, Y.J. and Wang, C.C., 2000, 'An Experimental Study of the Air-side Performance of the Super-slit Fin-and-Tube Heat Exchangers,' Int. J. Heat and Mass Transfer, Vol. 43, pp. 4475-4482 https://doi.org/10.1016/S0017-9310(00)00082-X
  12. Kang, H.C. and Kim, M.H., 1999, 'Effect of Strip Location on the Air-side Pressure Drop and Heat Transfer in Strip Fin-and-Tube Heat Exchanger,' Int. J. of Refrigeration, Vol. 22, pp. 302-312 https://doi.org/10.1016/S0140-7007(98)00062-0
  13. Kang, H.C. and Kim, M.H., 1997, 'A Large Scale Model Test to Investigate the Pressure Drop and Heat Transfer Characteristics in the Air Side of Two - Row Heat Exchanger,' Transaction of the KSME(B), Vol. 21, No. 1, pp. 113-124
  14. Yun, J.Y. and Lee, K.S., 1996, 'Heat Transfer Characteristics of Fin and Tube Heat Exchangers with Various Interrupted Surfaces for Air Conditioning Application,' Transaction of the KSME(B), Vol. 20, No. 12, pp. 3938-3948
  15. Yun, J.Y. and Lee, K.S., 2000, 'Influence of Design Parameters on the Heat Transfer and Flow Friction Characteristics of the Heat Exchanger with Slit Fins,' Int. J. Heat and Mass Transfer, Vol. 43, pp. 2529-2539 https://doi.org/10.1016/S0017-9310(99)00342-7
  16. Schmidt, T.E., 1949, 'Heat Transfer Calculations for Extended Surfaces,' Refrigeration engineering, pp. 351-357
  17. London, A.P., 1964, Mechanical Engineering, ASME, Vol. 86, pp. 31-34
  18. London, A.P. and Ferguson, C.K., 1949, Trans. ASME, Vol. 71, pp. 17-26
  19. Kays, W.M. and London, A.P., 1950, Trans. ASME, Vol. 72, pp. 1087~1097
  20. Air-conditioning and Refrigeration Institute, 1981, 'Standard for Forced Circulation Air-Cooling and Air-Heating Coils,' ARI Standard 410
  21. Zukauskas, A., 1972, 'Heat Transfer form Tubes in Cross Flow,' Advances in Heat Transfer, Vol. 8, pp. 93-160 https://doi.org/10.1016/S0065-2717(08)70038-8
  22. Wang, C.C., Tao, W.H. and Chang, C.J., 1999, 'An Investigation of the Airside Performance of the Slit Fin-and-Tube Heat Exchangers,' Int. J. Refrigeration, Vol. 22, pp. 595-603 https://doi.org/10.1016/S0140-7007(99)00031-6
  23. Du, Y.J. and Wang, C.C., 2000, 'An Experimental Study of the Airside Performance of the Superslit Finand-Tube Heat Exchangers,' Int. J. Heat and Mass Transfer, Vol. 43, pp. 4475-4482 https://doi.org/10.1016/S0017-9310(00)00082-X