Browse > Article

Air-side Heat Transfer and Friction Characteristics of Fined-tube Heat Exchangers under Heating Condition  

Kwon, Young Chul (Division of Mechanical Engineering)
Chang, Keun Sun (Division of Mechanical Engineering)
Ko, Kuk Won (Department of Control and Measurement Engineering)
Kim, Young Jae (Chemical and Biochemical Engineering)
Park, Byung Kwon (Division of Mechanical Engineering)
Publication Information
Applied Chemistry for Engineering / v.17, no.5, 2006 , pp. 476-482 More about this Journal
Abstract
An experimental study has been performed to investigate the characteristics of air-side heat transfer and friction of a fined tube heat exchanger under heating conditions. Air enthalpy calorimeter was used to obtain the performance evaluation and analysis of the fined tube heat exchanger. Eight finned tube heat exchangers with slit fin, louver fin, and plain fin were used. The air-side heat transfer coefficient was calculated by the log-mean-temperature-difference. Air-side heat transfer and friction were presented in terms of j factor and friction factor on Reynolds number. From the experimental result, it was found that the variations of air-side heat transfer and friction of fined tube heat exchanger with the change of the fin configuration, row number, fin pitch, and tube circuit were obtained. j factor and friction factor decreased with Reynolds number increased. The tube circuit affected the air-side heat transfer and friction. In the case of slit and louver fin, j factor of 1st row was higher than that of 2nd row. But, with increasing Re, j factor was reversed. The characteristics of j factor and friction factor of 2nd row heat exchanger were different according to the kind of fins.
Keywords
fined-tube; heat exchanger; friction; heat transfer; j factor; heating;
Citations & Related Records
연도 인용수 순위
  • Reference
1 F. C. McQiston, ASHRAE Transactions, 84, 266 (1978)
2 C. C. Wang, W. H. Tao, C. J. Chang, Int. J. of Refrigeration, 22, 595 (1999)   DOI   ScienceOn
3 F. Halici, I. Taymaz, and M. Gunduz, Energy, 26, 963 (2001)   DOI
4 T. E. Schmidt, Journal of ASRE, 4, 351 (1949)
5 W. Nakayama and L. P. Xu, 1st ASME/JSME. Thermal Engineering Joint Conference, 495 (1983)
6 RRC, Report (2005)
7 V. Gnielinski, Int. Chem. Engineering, 16, 359 (1976)
8 S. Sawai, T. Hayashi, Y. Ohtake, and T. Takei, Refrigeration, 41, 15 (1969)
9 X. Hu and A. M. Jacobi, Journal of Heat Transfer, 115, 66 (1993)   DOI
10 D. L. Gray and R. L. Webb, Proceeding of 8th Int. Heat Transfer Conference, 2745 (1986)
11 B. Youn, Y. S. Kim, and H. Y. Park, Air-conditioning and Refrigeration Engineering, 25, 151 (1996)
12 D. G. Rich, ASHRAE Transactions, 79, 135 (1973)
13 F. E. M. Saboya and E. M. Sparrow, Transactions of the ASME., 96, 265 (1974)   DOI