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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Investigation on the Airside Performance of Fin-and-Tube Heat Exchangers Having Sinusoidal Wave Fins

사인 웨이브 휜-관 열교환기의 공기측 성능에 관한 실험연구

  • Kim, Nae-Hyun (Department of Mechanical Engineering, University of Incheon) ;
  • Cho, Jin-Pyo (Department of Mechanical Engineering, University of Incheon) ;
  • Yoon, Baek (Air Conditioner and Refrigerator Div., Samsung Electronics Co.)
  • 김내현 (인천대학교 기계공학과) ;
  • 조진표 (인천대학교 기계공학과) ;
  • 윤백 (삼성전자 공조기사업부)
  • Published : 2004.04.01
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Abstract

The heat transfer and friction characteristics of the heat exchangers having sinusoidal wave fins were experimentally investigated. Twenty-nine samples having different waffle heights (1.5 mm and 2.0 m), fin pitches (1.3mm to 1.7mm) and tube rows (one to three) were tested. Focus was given to the effect of the waffle configuration (herringbone or sinusoidal) on the heat transfer and friction characteristics. Results show that the sinusoidal wave geometry provides higher heat transfer coefficients and friction factors than the herringbone wave geometry, and the difference increases as the number of row increases. The i/f ratios of the herringbone wave geometry, however, are larger than those of the sinusoidal wave geometry. Compared to the herringbone wave geometry, the sinusoidal wave geometry yielded a weak row effect, which suggests a superior heat transfer performance at the fully developed flow region. Possible explanation is provided considering the flow characteristics in wavy channels. Within the present geometric range, the effect of the waffle height on the heat transfer coefficient was not prominent. The effect of the fin pitch was also negligible. Existing correlations highly overpredicted both the heat transfer coefficients and friction factors. A new correlation was developed using the present data.

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References

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