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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Study on the Period of Optimum Defrost of Auto Defrost Unit by the Forced Fan Evaporator

강제 송풍 증발기에 의한 자동제상장치의 최적제상시기에 관한 연구

  • 구남열 (경남대학교 기계공학과) ;
  • 이윤경 (경남대학교 기계공학과) ;
  • 하옥남 (조선대학교 기계공학과)
  • Published : 2003.04.01
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Abstract

This study is on a experiment which shows to defrost automatically on the optimum time regardless of defrosting method. The result shows that the more defrost layers increase in fin tubes of evaporation, the less the section of the circulating air reduce. Thickness of the frost formation increases, so a pressure difference of ventilation increase, as a result automatic defrosting system sets the time COP drops suddenly up optimum time. Automatical defrosting system can find out the initial related current of evaporator fan motor and the value of load current in the optimum time. And it sets defrosting time, evaporating temperature, and temperature in refrigerator up system requiring value. Consequence of this experiment is that energy consumption with defrost load gets effect of reduction of eleven percent per 25.4 hours compared with common defrosting.

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References

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