The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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Experimental Study of Air-cooled Condensation in Slightly Inclined Circular Tube

경사진 원형관에서의 공냉응축에 관한 실험적 연구

  • 김동억 (경북대학교 정밀기계공학과) ;
  • 권태순 (한국원자력연구원(KAERI) 열수력안전연구부) ;
  • 박현식 (한국원자력연구원(KAERI) 열수력안전연구부)
  • Received : 2016.03.09
  • Accepted : 2016.05.22
  • Published : 2016.08.01
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Abstract

In this study, the experimental investigation of air-cooled condensation in slightly inclined circular tubes with and without fins has been conducted. In order to assess the effects of the essential parameters, variable air velocities and steam mass flow rates were given to the test section. The heat transfer performance of air-cooled condensation were dominantly affected by the air velocity, however, the increase of the steam mass flow rate gave relatively weaker effects to total heat transfer capability. And in the experimental cases with the finned tube, the total heat transfer rate of the finned tube was significantly larger than that of the flat tube. From those results, it can be confirmed that the most important parameter for air-cooled condensation heat transfer is the convective heat transfer characteristics of air. Therefore, for the well-designed long-term cooling passive safety system, the consideration of the optimal design of the fin geometry is needed, and the experimental and numerical validations of the heat transfer capability of the finned tube would be required.

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References

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