An Experimental Investigation on the Air-Side Performance of Fin-and-Tube Heat Exchangers Having Radial Slit Fins

다국어 초록 (Multilingual Abstract)

In this study, the heat transfer and friction characteristics of radial slit-finned heat exchangers are experimentally investigated. Louver-finned heat exchangers are also tested for comparison purpose.
The effect of fin pitch on j and f factor is negligible. Considering the small variation of the fin pitch (from 1.3mm to 1.7 mm), the foregoing argument should hold true for the present samples. Louver fin samples yield higher j and f factors than slit fin samples. The j factor increases as the number of tube row decreases. The f factor, however, is independent of the number of tube row. The j=f ratios of slit fin samples are larger than those of Louver fin samples.
Data are compared with available correlations.

다국어 초록 (Multilingual Abstract)

In this study, the heat transfer and friction characteristics of radial slit-finned heat exchangers are experimentally investigated. Louver-finned heat exchangers are also tested for comparison purpose.
The effect of fin pitch on j and f factor is negligible. Considering the small variation of the fin pitch (from 1.3mm to 1.7 mm), the foregoing argument should hold true for the present samples. Louver fin samples yield higher j and f factors than slit fin samples. The j factor increases as the number of tube row decreases. The f factor, however, is independent of the number of tube row. The j=f ratios of slit fin samples are larger than those of Louver fin samples.

참고문헌 (Reference)

1 D. G. Rich, "The e®ect of ¯n spacing on the heat transfer and friction performance of multi-row, smooth plate ¯n-and-tube heat exchangers" 79 : 137-145, 1973

2 D. G. Rich, "The e®ect of number of tube rows on the heat transfer performance of smooth plate-¯n-tube heat exchanges" 81 : 307-317, 1975

3 "SHRAE Standard 41.5, Standard Measurement Guide, Engineering Analysis of Experimental Data"

4 R. L. Webb, "Principles of Enhanced Heat Transfer" Taylor and Francis Pub 2005

5 H. -C. Kang, "Performance comparison of enhanced ¯n geometries used in ¯n-and-tube heat exchangers" 6 : 273-278, 1998

6 C.-C. Wang, "On the airside performance of ¯n-andtube heat exchangers, Heat Transfer Enhancement of Heat Exchangers" Kluwer Academic Press 141-162, 1999

7 J. -Y. Yun, "Investigation of heat transfer characteristics on various kinds of ¯n-andtube heat exchangers with interrupted surfaces" 42 : 2375-2385, 1999

8 T. Hatada, "Improved heat transfer performance of air coolers by strip ¯ns controlling air °ow distribution" 95 : 166-170, 1989

9 K. Hiroaki, "High efficiency heat exchanger" 35 : 71-79, 1989

10 T. E. Schmidt, "Heat transfer calculations for extended surfaces" 4 : 351-357, 1949

11 N. -H. Kim, "Heat transfer and friction correlations for wavy plate ¯n-and-tube heat exchangers" 119 : 560-567, 1997

12 C. -C. Wang, "Heat transfer and friction correlation for compact louvered ¯n-and-tube heat exchangers" 42 : 1945-1956, 1999

13 C. -C. Wang, "Heat transfer and friction characteristics of typical wavy ¯n-and-tube heat exchangers" 14 : 174-186, 1997

14 C. -C. Wang, "Heat transfer and friction characteristics of convex louver ¯n-and-tube heat exchangers" 9 : 61-79, 1996

15 C. -C. Wang, "Heat and mass transfer for plate ¯n-and-tube heat exchangers with and without hydrophilic coating" 41 : 3109-3120, 1998

16 이진욱, "HEAT TRANSFER AND PRESSURE DROP CHARACTERISTICS OF FIN-AND-TUBE HEAT EXCHANGERS HAVING SPIRAL FINS UNDER WET CONDITIONS" 대한설비공학회 19 (19): 185-193, 2011

17 K. Torikoshi, "Flow and heat transfer performance of a plate ¯n and tube heat exchanger (¯rst report: e®ect of ¯n pitch)" 4 : 411-416, 1994

18 D. T. Beecher, "E®ects of ¯n pattern on the airside heat transfer coe±cient in plate ¯nned-tube heat exchangers" 93 : 1961-1984, 1987

19 S. Wongwises, "E®ect of ¯n thickness on air-side performance of herringbone wavy ¯n-and-tube heat exchangers" 41 : 147-154, 2004

20 Y. Chokeman, "E®ect of ¯n pattern on the air-side performance of herringbone wavy ¯n-and-tube heat exchangers" 41 : 642-650, 2005

21 H. -B. Park, "Experimental study of heat transfer and pressure drop characteristics for °ow of water inside circular smooth and micro-¯n Tubes" 9 : 454-461, 1997

22 W. Nakayama, "Enhanced ¯ns for air cooled heat exchangers — Heat transfer and friction correlations" 1 : 495-502, 1983

23 C. -C. Wang, "Empirical correlations for heat transfer and °ow friction characteristics of herringbone wavy ¯n-and-tube heat exchangers" 25 : 673-680, 2002

24 "ESDU 98005, Design and performance evaluation of heat exchangers: The e®ectiveness and NTU method, Engineering and Sciences Data Unit 98005 with Amendment A"

25 K. Yasuda, "Development of condensing thermo¯n HEX-C tube" 9 : 27-30, 1990

26 C. -C. Wang, "Data reduction for airside performance of ¯n-and-tube heat exchangers" 21 : 218-226, 2000

27 C. -C. Wang, "Comprehensive study of convex louver and wavy ¯n-andtube heat exchangers" 12 : 423-430, 1998

28 N. -H. Kim, "Comparison of heat transfer and pressure drop characteristics of heat exchangers having plain ¯ns under dry and wet condition" 13 : 128-137, 2005

29 C. -C. Wang, "An investigation of the airside performance of the slit ¯nand-tube heat exchangers" 22 : 596-603, 1999

30 Y. -J. Du, "An experimental study of the airside performance of the superslit ¯n-and-tube heat exchangers" 43 : 4475-4482, 2000

31 C. -C. Wang, "An experimental study of heat transfer and friction characteristics of typical louver ¯n-and-tube heat exchangers" 41 : 817-822, 1998

32 B. Youn, "An experimental investigation on the airsid performance of ¯n-and-tube heat exchanger having radial slit ¯ns" 10 : 61-80, 2003

33 C. -C. Wang, "Airside performance of herringbone wavy ¯n-and-tube heat exchangers — Data with larger diameter tube" 21 : 1024-1029, 2011

34 "ASHRAE Standard 41.2, Standard Method for Laboratory Air-Flow Measurement"

35 "ASHRAE Standard 41.1, Standard Method for Temperature Measurement"

36 C. -C. Wang, "A heat transfer and friction correlation for wavy ¯n-andtube heat exchangers" 42 : 1919-1924, 1999

37 C. -C. Wang, "A comparative study of compact enhanced ¯n-and-tube heat exchangers" 44 : 3565-3573, 2001