Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Frosting Heat Transfer Characteristics of Evaporators Used for Household Refrigerators According to Fin Configuration

냉장고용 증발기의 핀 형상 변화에 따른 착상 열전달 성능특성

  • Received : 2010.05.19
  • Accepted : 2010.10.04
  • Published : 2010.12.01
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Abstract

The objective of this study is to investigate the heat transfer characteristics of evaporators that have various fin configurations and are used in household refrigerators. The frosting and defrosting characteristics of a spirally coiled circular fin-tube evaporator, a discrete-plate fin-tube evaporator, and a continuous-plate fin-tube evaporator were measured and compared. Under non-frosting conditions, the heat transfer coefficient of the spirally coiled circular fin-tube evaporator was 22.3% and 40.2% higher than the coefficients of the discrete- and continuous-plate fin-tube evaporators, respectively. Under frosting conditions, the heat transfer coefficient of the spirally coiled circular fin-tube evaporator was 27.0% and 46.3% higher than the coefficients of the discrete- and continuous-plate fin-tube evaporators, respectively. In addition, the defrosting water amount of the spirally coiled circular fin-tube evaporator was 3.2% and 9.4% lower than the amounts in the case of the discrete- and continuous-plate fin-tube evaporators, respectively.

본 논문은 냉장고용 증발기의 핀 형상을 변화시켜가면서 열전달 성능을 실험적으로 규명하는 것을 목적으로 하고 있다. 냉장고용 핀-튜브 증발기에 나선형 원형핀, 개별 평판핀 및 연속 평판핀을 적용하여 무착상 및 착상 열전달 성능과 제상성능을 측정하고 특성변화를 고찰하였다. 무착상조건에서 나선형 원형핀 증발기의 총괄열전달계수가 개별 평판핀 증발기에 비하여 22.3% 우수하고, 연속 평판핀 증발기에 비하여 40.2% 우수함을 알 수 있었다. 착상조건에서 나선형 원형핀 증발기의 총괄열전달계수가 개별 평판핀 증발기에 비하여 27.0% 우수하고, 연속 평판핀 증발기에 비하여 46.3% 우수함을 알 수 있었다. 또한, 나선형 원형핀 증발기의 제상량은 개별 평판핀 증발기에 비하여 3.2% 적고, 연속 평판핀 증발기에 비하여 9.4% 적었다.

Keywords

References

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  1. Study on Performance Characteristics of Spiral Fin-Tube Evaporator Applied to Domestic Refrigerator-Freezers vol.37, pp.3, 2013, https://doi.org/10.3795/KSME-B.2013.37.3.205