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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Frost Prevention of Fin-Tube Heat Exchanger by Spreading Antifreezing Solution

부동액 도포에 의한 핀-튜브 열교환기 착상방지

  • Oh, Sang-Youp (Thermal/Flow Control Research Center, Korea Institute of Science and Technology) ;
  • Chang, Young-Soo (Thermal/Flow Control Research Center, Korea Institute of Science and Technology)
  • 오상엽 (한국과학기술연구원 열유동제어연구센터) ;
  • 장영수 (한국과학기술연구원 열유동제어연구센터)
  • Published : 2006.06.01
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Abstract

A study on frost prevention of fin-tube heat exchanger is experimently performed by spreading antifreezing solution on heat exchanger surface. It is desirable that the antifreezing solution spreads completely on the surface forming thin liquid film to prevent frost nucleation and crystal growth and to reduce the thermal resistance across the liquid film. A small amount of antifreezing solution falls in drops on heat exchanger surface using two types of supplying devices, and a porous layer coating technique is adopted to enhance the wettedness of antifreezing solution on the surface. It is observed that the antifreezing solution liquid film prevents fin-tube heat exchanger from frosting, and heat transfer performance does not degrade through the frosting tests. The concentration of supplied antifreezing solution can be determined by heat transfer analysis of the first row of heat exchanger to avoid antifreezing solution freezing due to dilution by moisture absorption.

Keywords

References

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