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http://dx.doi.org/10.6110/KJACR.2014.26.2.072

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

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)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.26, no.2, 2014 , pp. 72-78 More about this Journal
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 : $52^{\circ}C$) 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.
Keywords
Waste heat; Defrost; PCM; Heat storage; Cold storage;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Tashtoush, B., 2000, Natural losses from vegetable and fruit products in cold storage, Food Control, Vol. 11, No. 6, pp. 465-470.   DOI
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.   DOI
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.   DOI   ScienceOn
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.   DOI   ScienceOn
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.   DOI
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.