권호 표지
DOI QR코드

DOI QR Code

Performance Evaluation of a Defrosting System Using the Condensation Heat of a Refrigerator in Cold Storage

저온창고에서 냉동기 응축폐열을 이용한 제상시스템 성능평가

  • Park, Chunwan (Graduate School of Mechanical Engineering, Chonbuk National University) ;
  • Lee, Donggyu (Graduate School of Mechanical Engineering, Chonbuk National University) ;
  • Im, Kwanbin (Cooltainer Co., Ltd.) ;
  • Kang, Chaedong (Geothermal Energy Center, Chonbuk National University)
  • Received : 2013年10月29日
  • Accepted : 2013年12月02日
  • Published : 2014年02月10日

Abstract

In a cold chain, the refrigerator is also employed for defrosting, by using an electric heater, which consumes 15% of the power for the system operation. In this study, the condensation heat of the refrigerant was suggested as the heat source of defrosting heat, instead of that from an electric defrost heater. The heat for defrosting was stored to a phase change material (PCM, NMP : 52ドル^{\circ}C$) in thermal storage, and was periodically supplied to the evaporator by a circulation loop of brine. As a result, a defrost time by the PCM was obtained that was less than or equal to that by the electric heater. Moreover, power consumption during defrosting was saved by up to 99% of that of the electric heater.

References

  1. Tashtoush, B., 2000, Natural losses from vegetable and fruit products in cold storage, Food Control, Vol. 11, No. 6, pp. 465-470. https://doi.org/10.1016/S0956-7135(00)00012-8
  2. Wu, J. H., Guang, O., Hou, P., and Xiao, H. B., 2011, Experimental investigation of frost formation on a parallel flow evaporator, Applied Energy, Vol. 88, No. 5, pp. 1549-1556. https://doi.org/10.1016/j.apenergy.201011006
  3. Huang, J. M., Hsieh, W. C., Ke, X. J., and Wang, C. C., 2008, The effects of frost thickness on the heat transfer of finned tube heat exchanger subject to the combined influence of fan types, Applied Thermal Engineering, Vol. 28, No. 7, pp. 728-737. https://doi.org/10.1016/j.applthermaleng.2007年06月02日0
  4. O'Neal, D. L., Peterson, K. T., Anand, N. K., and Schliesing, J. S., 1989, Refrigeration system dynamics during the reverse cycle defrost. ASHRAE Transactions, Vol. 95, No. 2, pp. 689-698.
  5. Yang, D. K., Lee, K. S., and Song, S., 2006, Fin spacing optimization of a fin-tube heat exchanger under frosting condition, International Journal of Heat and Mass Transfer, Vol. 49, pp. 2619-2625. https://doi.org/10.1016/j.ijheatmasstransfer.2006年01月01日6
  6. Kim, K. and Lee, K. S., 2011, Frosting and defrosting Characteristics of a fin according to surface contact angle, International Journal of Heat and Mass Transfer, Vol. 54, pp. 2758-2764. https://doi.org/10.1016/j.ijheatmasstransfer.2011年02月06日5
  7. Choi, J. M., Shim, Y. H., Lee, S. H., Lee, J., Park, S. R, Kim, Y., and Yoon, J., 2005, An analysis of the control and defrost patents for heat pump, Journal of SAREK, Vol. 17, No. 12, pp. 1192-1203.
  8. Shin, Y. H., Oh, W. K., Park, K. H., Kim, Y., and Shin, Y., 2005, Measurement and analysis of showcase field data, Journal of SAREK, Vol.17, No. 5, pp. 436-443.

Cited by

  1. Recent Progress in Air-Conditioning and Refrigeration Research: A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2014 vol.27, pp.7, 2015, https://doi.org/10.6110/KJACR.2015277.380