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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Study on the Comparison of Heat Exchange Performance of Liquefied Gas Vaporizer at Super Low Temperature

초저온 액화가스 기화기의 열 교환성능 비교에 관한 연구

  • Kim, Pil-Hwan (Graduate School of Department of Mechanical Engineering, Gyeoungsang National University) ;
  • Kim, Chul-Pyo (Graduate School of Department of Mechanical Engineering, Gyeoungsang National University) ;
  • Jeong, Hyo-Min (Department of Mechanical Engineering, Gyoungsang National University) ;
  • Chung, Han-Shik (Department of Mechanical Engineering, Gyoungsang National University) ;
  • Lee, Yong-Hun (Institute of Nature and Environmental Technology, Kanazawa University)
  • Published : 2008.10.10
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Abstract

Air-heating vaporizer usually is used to regasify LNG at satellite areas because of the small demand of natural gas there. The common type of air heating vaporizer which exists in the market is the longitudinally finned type with 8 fins, 55 mm fin length and 2mm fin thickness. To contribute in developing an efficient air-heating vaporizer, experiment on finned type air-heating vaporizer using 8 fins, 50mm(fin length) with 2 mm(fin thickness) which exist in the market and 4 fins, 75 mm(fin length) with 2 mm(fin thickness), which is proposed, were conducted. Then, both types of vaporizers are compared. The experiments were conducted in one hour by varying the ambient condition and the length of the vaporizer. The ambient air was controlled so that it has the same temperature, humidity and air velocity with air condition in every season available and the length was varied 4000 mm, 6000 mm and 8000 mm for each type of vaporizer. Additional experiment with longer duration, i.e. In this experiment, the main aspects in analyzing the characteristics of the air heating vaporizer the inlet-outlet enthalpy difference and the outlet temperature of the working fluid. $LN_2$ is used to substitute LNG because of safety reason. The results show that the characteristics of the finned type 4fin75le vaporizer are comparable to finned type 8fin50le vaporizer.

Keywords

References

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