광폭 슬릿 핀이 장착된 핀-관 열교환기의 공기 측 전열 성능에 대한 실험 연구
An Experimental Study on the Heat Transfer Performance of Fin-and-Tube Heat Exchangers Having Wide Slit Fins
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
One simple way of increasing the heat transfer for a fin-and-tube heat exchanger is to increase the fin surface area. In this study, a series of tests were conducted on wide slit fin heat exchangers having an increased fin area (Pl/Pt = 0.87), and the results were compared with those of standard slit fin heat exchangers (Pl/Pt = 0.6). Thermal performances of wide silt-finned samples were superior to those of standard slit fin samples. For one row configuration, the j factor of the wide slit fin sample was 11% larger, and the f factor was 33 % smaller than those of the standard slit fin sample. The difference decreased as the number of tube row increased, although wide slit fin sample always yielded superior performance, The reason was attributed to the many narrower slits formed on the wide fin sample. Furthermore, the effect of fin pitch on j and f factor was not significant, and j factor decreased with the increase of the number of tube row.
Abstract
One simple way of increasing the heat transfer for a fin-and-tube heat exchanger is to increase the fin surface area. In this study, a series of tests were conducted on wide slit fin heat exchangers having an increased fin area (Pl/Pt = 0.87), and the results were compared with those of standard slit fin heat exchangers (Pl/Pt = 0.6). Thermal performances of wide silt-finned samples were superior to those of standard slit fin samples. For one row configuration, the j factor of the wide slit fin sample was 11% larger, and the f factor was 33 % smaller than those of the standard slit fin sample. The difference decreased as the number of tube row increased, although wide slit fin sample always yielded superior performance, The reason was attributed to the many narrower slits formed on the wide fin sample. Furthermore, the effect of fin pitch on j and f factor was not significant, and j factor decreased with the increase of the number of tube row.
참고문헌 (13)
- R. L. Webb, "Principles of Enhanced Heat Transfer" (2005), Taylor and Francis Pub
- C.-C. Wang, "Heat Transfer Enhancement of Heat Exchangers", pp.141~162 (1999), Kluwer Academic Press
- W. Nakayama, "Enhanced fins for air cooled heat exchangers – heat transfer and friction correlations", Proc. 1st ASME, 1983, pp.1, 495~502
- C.-C. Wang, "Heat and mass transfer for plate fin-and-tube heat exchangers with and without hydrophilic coating", Int. J. Heat Mass Transfer, 41, pp.3109~3120 (1998)
- C.-C. Wang, "An investigation of the airside performance of the slit fin-and-tube heat exchangers", Int. J. Refrig., 22, pp.596~603 (1999)
- Y.-J. Du, "An experimental study of the airside performance of the superslit fin-and-tube heat exchangers", Int. J. Heat Mass Transfer, 43, pp.4475~4482 (2000)
- C.-C. Wang, "A comparative study of compact enhanced fin-and-tube heat exchangers", Int. J. Heat Mass Transfer, 44, pp.3565~3573 (2001)
- 김내현, "An Experimental Investigation on the Airside Performance of Fin-and-Tube Heat Exchangers Having Nonsymmetrical Slit Fins", International Journal of Air-Conditioning and Refrigeration, 23(2), pp.1~13 (2015), 대한설비공학회[DOI]
- "ASHRAE Standard 41.1, Standard Method for Temperature Measurement", ASHRAE, ~ (1986)
- "ASHRAE Standard 41.2, Standard Method for Laboratory Air-Flow Measurement", ASHRAE, ~ (1987)
- "ASHRAE Standard 41.5, Standard Measurement Guide, Engineering Analysis of Experimental Data", ASHRAE, ~ (1975)
- "ESDU 98005, Design and performance evaluation of heat exchangers: the effectiveness and NTU method, Engineering and Sciences Data Unit 98005 with Amendment A", London ESDU International plc, 122~129 (1998)
- H.-B. Park, "Experimental study of heat transfer and pressure drop characteristics for flow of water inside circular smooth and micro-fin Tubes", Korean J. Air Cond. Refrig., 9(4), pp.454~461 (1997)