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 Study of Performance of CO2 Microchannel Evaporator According to Frost Growth

서리성장에 따른 이산화탄소용 마이크로채널 증발기의 성능에 관한 해석적 연구

  • Shin, Eun-Sung (Graduate School of Mechanical Engineering, Chosun University) ;
  • Cho, Hong-Hyun (Department of Mechanical Engineering, Chosun University)
  • 신은성 (조선대학교 기계공학과 대학원) ;
  • 조홍현 (조선대학교 기계공학과)
  • Received : 2012.08.16
  • Published : 2012.10.10
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Abstract

The microchannel evaporator with louver fin using carbon dioxide are analyzed according to the frost growth. To predict the performance of microchannel evaporator with the frost growth under low temperature, the simulation condition of previous studies was applied. As a result, the frost thickness increases and its increasing rate is reduced when the operating time increases. Frost thickness increases gradually below the quality of 0.74, and then it decreases rapidly. In addition, the frost growth of present model under same surface temperature is very similar trends with Moallem's test results. In case of low temperature application, the dimensionless frost thickness increases dramatically and it is about 0.86 after 10 minutes.

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References

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