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A Numerical Analysis of the Reverse Heat Loss Method for a Refrigerator

냉장고 역열손실 방법의 수치해석적 분석에 관한 연구

  • Ha, Ji-Soo (Department of Energy&Environmental Science, Keimyung University Ref. R&D Lab, LG Electronics Inc.) ;
  • Shim, Jae-Sung (Department of Energy&Environmental Science, Keimyung University Ref. R&D Lab, LG Electronics Inc.)
  • 하지수 (계명대학교 에너지환경과학과) ;
  • 심재성 (계명대학교 에너지환경과학과)
  • Received : 2011.08.16
  • Accepted : 2011.12.05
  • Published : 2011.12.31

Abstract

The present study has been carried out to predict the heat transfer characteristics of reverse heat loss method for a residential refrigerator by using numerical analysis and corresponding experiment. From the measured values of temperature and heat input, one can conclude that, the temperature inside the refrigerator has a nearly linear relationship with heat input. The effect of gasket heat loss was examined with the change of thermal conductivity of gasket region. The appropriate thermal conductivity of gasket region was acquired from the comparison of heat losses with the experimental result and numerical analysis. The result of calculated heat losses had accuracy within 1.8% error with the experimental result. With the selected thermal conductivity of gasket region, the effectiveness of reverse heat loss method was examined with the change of thermal conductivity of vacuum insulation panel.

본 연구는 냉장고의 열전달 특성을 예측하기 위하여 냉장고를 가동하지 않은 상태에서 역열손실 방법에 대한 수치해석과 실험을 수행하였다. 측정된 온도와 투입한 열량의 관계로부터 투입한 열량은 거의 선형적으로 냉장고 내외부 온도차와 비례함을 알 수 있었다. 냉장고 문과 본체사이의 가스켓 영역에서 열손실에 관한 열전도율은 실험과 수치해석의 비교를 통해 도출하였다. 수치해석을 통해 구한 열손실은 실험을 통한 열손실과 비교할 때 오차 범위 1.8% 이하의 정확도로 예측되었다. 이러한 정확도의 수치해석 방법으로 냉장고 진공 단열재의 열전도도 변화에 대한 열손실 저감 효과를 살펴보았다.

Keywords

References

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