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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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The Effect of Water Contact Angles of the Fin Surfaces of the Fin-and-Tube Heat Exchangers on the Water Hold-up

핀-관 열교환기에서의 핀의 물 접촉각이 응축잔수량에 미치는 영향

  • 신종민 (LG전자 디지털 어플라이언스 연구소) ;
  • 이남교 (LG전자 디지털 어플라이언스 연구소) ;
  • 한성주 (LG전자 디지털 어플라이언스 연구소) ;
  • 하삼철 (LG전자 디지털 어플라이언스 연구소)
  • Published : 2001.06.01
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Abstract

An experimental study on the behavior of the water hold-up by condensation of a fin-and-tube heat exchanger with regard to the surface characteristics, i.e., contact angle, was conducted. The static and dynamic contact angles were measured, and condensation experiments were conducted. Flow patterns on the fins with different surface characteristics were visualized. Results showed that the static contact angle is proportional to the dynamic contact angle within the range of this study. The water hold-up of the heat exchanger increases as the static or dynamic contact angle of its surfaces increases. Existence of transition of flow patterns was found as the static or dynamic angle increase. Due to the transition in the flow patterns, changes in the gradient of the water hold-up is occurred around the static angle of 8$0^{\circ}C$.

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References

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