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

  • 제14권7호
  • /
  • Pages.575-583
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  • 2002
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
권호 표지

알루미늄 다채널 평판관내 R-22 및 R-410A 응축에 관한 연구

R-22 and R-410A Condensation in Flat Aluminum Multi-Channel Tubes

  • Jung, Ho-Jong (Graduate School of Mechanical Engineering, Incheon University) ;
  • Kim, Nae-Hyun (Department of Mechanical Engineering, Incheon University) ;
  • Yoon, Baek (Air-conditioning Div., Samsung Electronics) ;
  • Kim, Man-Hoi (Air-conditioning Div., Samsung Electronics)
  • 발행 : 2002.07.01
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초록

In this study, condensation heat transfer tests were conducted in flat aluminum multi-channel tubes using R-410A, and the results are compared with those of R-22. Two internal geometries were tested; one with a smooth inner surface and the other with micro-fins. Data are presented for the following range of variables; vapor quality (0.1~0.9), mass flux (200~600 kg/$m^2$s) and heat flux (5~15 ㎾/$m^2$). Results show that the effect of surface tension drainage on the fin surface is more pronounced for R-22 than R-410A. The smaller Weber number for R-22 may be responsible. For the smooth tube, the heat transfer coefficient of R-410A is slightly larger than that of R-22. For the micro-fin tube, however, the reverse is true. Possible reasoning is provided considering the physical properties of the refrigerants. For the smooth tube, a correlation of Akers et at. type predicts the data reasonably well. For the micro-fin tube, the Yang and Webb model was modified to correlate the present data.

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참고문헌

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