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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Study on the Frost Prevention using Micro Liquid Film of an Antifreezing Solution

마이크로 부동액막을 이용한 착상방지에 관한 실험적 연구

  • Chang Young- Soo (Thermal/Flow Control Research Center, Korea Institute of Science and Technology) ;
  • Yun Won -Nam (Thermal/Flow Control Research Center, Korea Institute of Science and Technology)
  • 장영수 (한국과학기술연구원 열유동제어연구센터) ;
  • 윤원남 (한국과학기술연구원 열유동제어연구센터)
  • Published : 2005.05.01
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Abstract

The effect of anti freezing solution liquid film on the frost prevention is experimentally investigated. It is desirable that the antifreezing solution spreads widely on the heat exchanger surface forming thin liquid film to prevent frost nucleation and reduce the thermal resistance across the film. A porous layer coating technique is adopted to improve the wettedness of the anti freezing solution on a parallel plate heat exchanger. The antifreezing solution spreads widely on the heat exchanger surface with 100 $\mu$m thickness by the capillary force resulting from the porous structure. It is observed that the antifreezing solution liquid film prevents a parallel plate heat exchanger from frosting. The reductions of heat and mass transfer rate caused by thin liquid film are only $1\~2\%$ compared with those for non-liquid film surface.

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References

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