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

The Korean Society of Mechanical Engineers (대한기계학회)
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Evaporation Heat Transfer and Pressure Drop of R-22 and R-410A in Small Sized Micro-Fin Tubes

미소 전열촉진관내 R-22 및 R-410A의 증말열전달 및 압력강하 특성 연구

  • Hwang, Junhyeon (Dept.of Mechanical Engineering, Graduate School of Korea University) ;
  • Yun, Lin (Dept.of Mechanical Engineering, Graduate School of Korea University) ;
  • Kim, Yongchan (Dept.of Mechanical Engineering, Korea University)
  • 황준현 (고려대학교 대학원 기계공학과) ;
  • 윤린 (고려대학교 대학원 기계공학과) ;
  • 김용찬 (고려대학교 기계공학과)
  • Published : 2001.07.01
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Abstract

Characteristics of evaporation heat transfer in 6.2 and 5.1mm OD micro-fin tubes were investigated in the present study. The data were taken at evaporation temperatures of -5$^{\circ}C$ and 5$^{\circ}C$ and heat fluxes 5kW/$m^2$ to 10kW/$m^2$. Mass flux was consequently maintained at 210, 300 and 410kg/$m^2$s for the 6.2mm OD tube and 465, 500 and 600kg/$m^2$s for the 5.1mm OD tube. The effects of heat flux, mass flux, and outer diameter on the heat transfer coefficient are explored in the present study. The data showed that the evaporation heat transfer coefficient for the 6.2mm OD tube was averagly higher by 16% than that for a 7.0mm OD tube, while the 5.1mm OD tube had approximately 30% higher value than the 6.2mm OD tube.

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References

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