Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effects of Hydrophilic Surface Treatment on Evaporation Heat Transfer at the Outside Wall of Enhanced Tubes

가공관의 외벽에서 친수성 표면처리가 증발열전달에 미치는 영향

  • Park, No-Seong (Dept. of Mechanical and Car Engineering, Kookmin University) ;
  • Hwang, Gyu-Dae (Heat Flowing Control Research Center, Korea Institute of Science and Technology) ;
  • Kim, Ho-Yeong (Heat Flowing Control Research Center, Korea Institute of Science and Technology) ;
  • Gang, Byeong-Ha (Dept. of Mechanical and Car Engineering, Kookmin University) ;
  • Jeong, Jin-Taek
  • 박노성 (국민대학교 기계자동차공학부) ;
  • 황규대 (한국과학기술연구원 열유동제어연구센터) ;
  • 김호영 (한국과학기술연구원 열유동제어연구센터) ;
  • 강병하 (국민대학교 기계자동차공학부) ;
  • 정진택
  • Published : 2001.05.01
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Abstract

Experiments have been carried out to investigate the evaporation heat transfer characteristics of various tubes on which hydrophilic surface treatment using plasma was employed. Spiral, corrugated and low-finned tubes were selected as test tubes. The evaporator tubes were bundled to form three rows of tubes connected in series, with each row being 400mm long. The results obtained indicate that hydrophilic treated tubes tested exhibit better evaporation heat transfer performance as compared with untreated tubes. It is found that the high wettability of the surface obtained through hydrophilic treatment induces film flow onto the tubes during the evaporation process, while sessile drops are formed on untreated tubes.

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References

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