DOI QR코드

DOI QR Code

Experimental Study for Development of Air Eject Defrost Equipment

공기분사식 제상장치 개발에 관한 실험적 연구

  • 한인근 (부경대학교 대학원 냉동공조공학과) ;
  • 김창영 (부경대학교 대학원 냉동공조공학과) ;
  • 김재돌 (동명대학 건축기계설비과) ;
  • 윤정인
  • Published : 2001.03.01

Abstract

One of the problems in a refrigerator operation is the frost formation on a cold surface of the evaporator. The frost layer is formed by the sublimation of water vapor when the surface temperature is below the freezing point. This frost layer is usually porous and formed on the cold surface of the evaporator. The frost layer on the surface of a evaporator will make side effect such as thermal resistance. However, these important factors have not been used in determining the defrosting period. Therefore, the proper defrosting operation period based on the new defrosting method is very important, and make a comparison between conventional method like electric defrost and new method in compression work, evaporation pressure, evaporation temperature.

Keywords

References

  1. Hayashi, Y., et al, 1977, 'Study of Properties Correlating with Frost Formation Types,' Journal of Heat Transfer, Vol. 99, No. 239, pp. 885-892
  2. 村井 進, 1987, 'ホットガスデフロストの省エネルキ-效果,' 冷凍, Vol. 62, No. 716, pp. 56-61
  3. 高田 保, 1992, '天井冷却管自動除霜機', 冷凍, Vol. 67, No. 779, pp. 50-55
  4. 靑木和夫.林 勇二郞, 1980, '霜層の成長と融解', 冷凍, Vol. 55, No. 632, pp. 1-10
  5. 安立正明, 1997, 'ヒ-トポンプ 式ル-ムアコンにおける着霜現象について', 日本冷凍協會論文集, Vol. 52, No. 598, pp. 9-20
  6. 이관수, 이태희, 김우승, 1995, '착상시 설계인자에 따른 핀-관 열교환기의 성능변화에 관 한 실험적 연구,' 대한기계학회논문집, Vol. 19, No. 10, pp. 2657-2666
  7. 이관수, 이태희, 김우승, 1994, '착상조건하에서 평행 평판 열교환기의 열 및 물질전달,' 공기조화.냉동공학논문집, Vol. 6, No. 2, pp. 155-165
  8. 이관수, 김규우, 지성, 1998, '핀-관 열교환기에 대한 제상 거동에 관한 실험적 연구,' 공기조화.냉동공학논문집, Vol. 10, No. 6, pp. 649-657
  9. 靑木和夫, 1986, 'ヒ-トポンプ の着想と除霜,' 日本冷凍協會論文集, Vol. 3, No. 2, pp. 1-9
  10. Brian, P.L. T., Reid, R. C., and Stah, Y. T., 1970, 'Frost Deposition on Cold Surface,' Ind. Eng. Chem. Fundamentals, Vol. 9, No. 3, pp. 375-380 https://doi.org/10.1021/i160035a013
  11. Yoshida, Z., 1950, 'Heat Transfer by Water Vapor in Snow Cover,' Low Temperature Science, Vol. 5, pp. 93-100
  12. Hayashi, Y., Aoki, K., and Yuhara, H., 1676, 'Study of Frost Formation in Forced Convection,' Trans. JSME, Vol. 42, No. 355, pp. 885-892
  13. Rite, R. W., and Craswford, R. R., 1991, 'The Effect of Frost Accumulation on the Performance of Domestic Refrigerator freezer Fined-tube Evaporator Coils,' ASHRAE Transaction, Vol. 97, Pt. 2, pp. 428-437
  14. 岩田 博.坂爪秋郞, 1985, '二溫度檢出による除霜開始制御裝置,' 冷凍, Vol. 60, No. 691, pp. 51-55