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

The Korean Society of Mechanical Engineers (대한기계학회)
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Pool Boiling Heat Transfer Characteristics of R-l34a in Titanium Horizontal Plain and Low Finned Tubes

티타늄 평활관 및 전열촉진관에서 R-l34a의 관외측 풀비등 열전달 특성에 대한 연구

  • 허재혁 (고려대학교 공학기술연구소) ;
  • 윤린 (고려대학교 공학기술연구소) ;
  • 정진택 (고려대학교 기계공학과) ;
  • 문영준 (고려대학교 기계공학과) ;
  • 김용찬 (고려대학교 기계공학과)
  • Published : 2005.07.01
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Abstract

Pool boiling heat transfer characteristics of R-134a were investigated in titanium plain and low finned tubes. The diameter of test tube was 15.88 mm and the fin density was 33 fpi. Tests were conducted at saturation temperatures of $20^{\circ}C$ and $30^{\circ}C$. Heat fluxes varied from 5000 W/$m^2$ to 50,000 W/$m^2$ based on surface area of the plain tube. The pool boiling heat transfer coefficients of the titanium horizontal plain tube are lower than those of the copper plain tube by $8.2\%$. The boiling heat transfer coefficients of the low finned tube are averagely higher than those of the plain tubes by $34\%$. The average deviation of the Slipcevic correlation from the present data for the low finned tube is $20\%$.

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References

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