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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Analysis on the Thermal Performance of an Ammonia Unit Cooler

암모니아 유니트 쿨러의 열성능 해석

  • 최재광 (인제대학교 대학원 기계공학과) ;
  • 김무근 (인제대학교 기계자동차공학부) ;
  • 박병규 (한국기계연구원 열유체환경연구부)
  • Published : 2001.11.01
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Abstract

Since the surface temperature of the evaporating tube in an ammonia unit cooled is lower than the dew point of atmosphere, the moisture in the atmosphere condenses and the frost grows on the tube. The frost of liquid film decreases the heat transfer rate. The reliable analysis of the heat transfer is required for the prediction of the optimal design of the ammonia unit cooler. For the specific commercial model, the performance was numerical1y estimated for the variation of operating condition and geometric configuration. It is found that there exists an optimum range for the parameters such as mass flow rate of air and refrigerant, humidity, refrigerant quality, fin pitch, the number of step, the number of rows and the pattern of refrigerant path.

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References

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