Journal of Advanced Marine Engineering and Technology

  • 제31권6호
  • /
  • Pages.715-722
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  • 2007
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  • 2234-7925(pISSN)
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  • 2234-8352(eISSN)
한국마린엔지니어링학회 (The Korean Society of Marine Engineering)
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마이크로핀관내에서 R-22와 R-4O7C의 응축압력강하 특성에 관한 실험적 연구

Experimental study for the pressure drop of R-22 and R-4O7C during the condensation in the micro-fin tubes

  • 노건상 (동명대학교 환경설비공학과)
  • 발행 : 2007.09.30
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초록

Experiments were conducted for the investigation of pressure drop inside horizontal micro-fin tubes during the condensation of R-22 and ternary refrigerant. R-407C(HFC-32/125/134a 23/25/62 wt%) as a substitute of R-22. The condenser is a double-tube and counterflow type heat exchanger which is consisted with micro-fin tubes having 60 fins with a length of 4000mm, outer diameter of 9.53mm and fin height of 0.2mm. The mass velocity varied from 102.1 to $301.0kg/(m^2{\cdot}s)$ and inlet quality was fixed as 1.0. From the experimental results. the pressure drop for R-407C was considerably higher than that for R-22. The value of PF(penalty factor) for both of refrigerants was not bigger than the ratio of micro-fin tube area to smooth tube area. Based on the experimental data. correlation was Proposed for the prediction of frictional pressure drop during the condensation of R-22 and R-407C inside horizontal micro-fin tubes.

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참고문헌

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