Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지
DOI QR코드

DOI QR Code

Condensation heat transfer characteristics of R-22 and R-407C in micro-fin tubes

마이크로핀관에서의 냉매 R-22, R-407C의 응축전열특성에 관한 연구

  • 노건상 (동명대학교 공과대학 환경설비공학과)
  • Published : 2008.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

Experimental results for forced convection condensation of Refrigerant-22 and ternary Refrigerant-407C(HFC-32/125/134a 23/25/52 wt%) which is being considered as a substitute R-22 inside a horizontal micro-fin tube are presented. The test section was horizontal double-tube counterflow condenser with a length 4,000 mm micro-fin tube, having 8.53 mm ID, 0.2 mm fin height and 60 fins. The range of parameters of mass velocity were varied from 102.1 to 301.0 kg/(m2.s) and inlet quality 1.0. At the given experimental conditions. the average heat transfer coefficients for R-407C were lower than that for R-22 at a micro-fin tube. Over the mass velocity range tested. the PF(penalty factor) for R-22, R-407C were lower than the increasing ratio of heat transfer area by fins, and the EF(enhancement factor) for R-22, R-407C were higher than the increasing ratio of heat transfer area by fins.

Keywords

References

  1. Geon-Sang, Roh, Hoo-Kyu, Oh, 2007, 'Study on the evaporation heat transfer chracterstics of R-134a in small diameter tubes', J. Korean Society of Marine Engineering, Vol. 31, No. 3, pp. 224-234 https://doi.org/10.5916/jkosme.2007.31.3.224
  2. Geon-Sang, Roh, Chang-Hyo, Son, Hoo-Kyu, Oh, 2007, 'Evaporation Heat Transfer Characteristcs of Hydro Carbon Refrigerant R-290 and R-600a in the Horizontal Tubes', J. Korean Society of Marine Engineering, Vol. 31, No. 1, pp. 74-83 https://doi.org/10.5916/jkosme.2007.31.1.74
  3. Blaise, J. C., Dutto, T. and Ambrosino, J. L., 1989, 'First Industrial Application of Non-azeotropic Mixture', Intl. J. Ref., Vol. 12, No. 9, pp. 255-258 https://doi.org/10.1016/0140-7007(89)90090-X
  4. Vineyard, E. A., 1988, 'Laboratory Testing of a Heat Pump System Using an R13B1/R152a Refrigerant Mixture', ASHRAE Trans., Vol. 94, Part. 1, pp. 292-303
  5. McLinden, M. O., Klein, S. A., Lemmon, E. W., Peskin, A. P., 1998, NIST Thermodynamic Properties and Refrigerant Mixtures Database (REFPROP), Version 6.01, National Institute of Standards and Technology, Gaithersburg, MD, U.S.A
  6. Schlager, L. M., Pate, M. B., and Bergles, A. E., 1988, 'Evaporation and Condensation of Refrigerant-Oil Mixtures in a Smooth Tube and Micro-fin Tube', ASHRAE Trans., Vol. 94, Part. 1, pp. 149-166
  7. 園田啓之, 1994, "混合冷媒の役割", 冷凍, 第69卷, 第806號, pp. 1329-1332
  8. Goto, M., Kanbe, K., Inoue, N., and Sato, M., 1994, 'Condensation Heat Transfer of HCFC-22 and HFC-32/ HFC-125/HFC-134a inside and Internally Grooved Horizontal Tubes(in Japanese)', Proc. of the 31st Japan Symposium on Heat Transfer, pp. 736-738
  9. 內田麻理, 伊藤正昭, 工藤光夫, 1994, "水平管內面形狀改善による非共沸混合冷媒の傳熱性能向上(I)(凝縮熱傳達率の實驗的檢討)",日本機械學會熱工學講演會講演論文集,pp.227-229
  10. 虫至子穀, 戶田一美, 奧山和之, 鳥越邦和, 1995, 非共沸混合冷媒HFC-32/125/134aの傳熱促進に關する硏究', 第29回 空氣調和. 冷凍聯合講演會講演論文集, pp. 69-72