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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Performance Evaluation of the Hybrid Defrost Process in the Fin-Tube Evaporators of Refrigerators

하이브리드 제상 방식을 적용한 냉장고용 핀-관 열교환기의 제상 성능 평가

  • Lee, Su-Won (Refrigerator R&D Laboratory, LG Electronics) ;
  • Park, Yong-Joo (HA R&D Laboratory, LG Electronics) ;
  • Kweon, Lae-Un (Department of Mechanical Engineering, Pusan National University) ;
  • Jeong, Young-Man (Department of Mechanical Engineering, Pusan National University) ;
  • Lee, Jae-Keun (Department of Mechanical Engineering, Pusan National University)
  • Received : 2010.07.12
  • Accepted : 2010.11.17
  • Published : 2011.01.10
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Abstract

The hybrid defrost process combined with hot-gas bypass defrost and electric heater defrost was experimentally evaluated about its defrost performance in the fin-tube evaporators of household refrigerators. Also the hybrid defrost process was compared with only electric heater defrost process. The defrost efficiency of the hybrid defrost process was shown two times higher than electric heater defrost process. The defrost time of the hybrid defrost process was shorten about 10%~50% than electric heater defrost process. Thermal shock after defrost process was decreased about 50% for the case of the hybrid defrost. It was found that energy consumption ratio of defrost process was reduced up to 7.4% compared with 22.4% of electric heater defrost at the condition of $25^{\circ}C$ ambient temperature.

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References

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