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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on the Heat Transport Limitations of a PFC(FC-72) Two-Phase Closed Thermosyphon for Cooling Power Semiconductors

전력변환 반도체 냉각용 PFC(FC-72) 밀폐형 2상 열사이폰의 열전달 한계에 관한 연구

  • 박용주 (성균관대학교 기계공학부 대학원) ;
  • 홍성은 (유한대학교 건축설비과) ;
  • 김철주 (성균관대학교 기계공학부)
  • Published : 2002.09.01
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Abstract

In this study, the heat transport limitations of a two-phase closed thermosyphon were investigated. For the test, a two-phase closed thermosyphon ($L_t/: 600 mm,\;L_e:105mm,\;L_a:75mm,\;L_c:420mm,\;D_o:22.2mm,$ container: copper (inner grooved surface), working fluid: PFC ($C_6F_14$) was fabricated with a reservoir that can change the fill charge ratio. The following was imposed as the factors on the heat transport limitations of a two-phase closed thermosyphon. 1) Fill charge ratio of the working fluid. 2) Tilt angle of the longitudinal axis. From tile experimental data, some results were obtained as follows. When the fill charge ratio was relatively small ($\psi$20%), the heat transport limitation occurred about 100W by dry-out limitation. However over 40%, it shelved nearly constant value (500 W) by flooding limitation. The heat transport limitation according to the tilt angle increased smoothly until the tilt angle was $60^{\circ}$,/TEX>, after then decreased slowly.

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References

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