Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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A Study on the Thermal Analysis of Spray Cooling for the Membrane Type LNGC During the Cool-Down Period

급냉각기간에서 멤브레인형 LNGC의 분무냉각 열해석에 관한 연구

  • 이정혜 (한국해양대학교 대학원 냉동공조공학과) ;
  • 김경근 (한국해양대학교 기관시스템공학부) ;
  • 노승탁 (서울대학교 기계항공공학부) ;
  • 정한식 (경상대학교 기계항공공학부) ;
  • 김성규 (한국해양대학교 기관시스템공학부)
  • Published : 2003.01.01
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Abstract

The present paper is concerned to the thermal analysis during the cool-down period of 138,000 m$^3$class GTT MARK-III membrane type LNG carrier servicing with LNG from the Middle East to Korea. It is the cool-down period that cools the insulation wall and the gas in LNG tank to avoid the thermal shock as the start of loading of -162$^{\circ}C$ LNG. For six hours of the standard cool-down period, the temperature of NG falls down from -4$0^{\circ}C$ to -13$0^{\circ}C$ and especially the mean temperature of the 1st barrier in the top side insulation wall falls down from -38.38$^{\circ}C$ to -122.42$^{\circ}C$ in case of IMO design condition. By the 3-D numerical calculation about the cargo tank and the cofferdam, the temperature variation in hulls and insulations is precisely predicted in this paper. And the mean temperature variation of gas is calculated as the function of the spraying rate by the heat balance model during the cool-down period.

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References

  1. Kim, K.G., Ro, S.T., Shung, H.S., Lee, J.H. and Chun, B.I., et al., 1998, 'Development of Thermal Design Technology for GTT MARK-Ⅲ Membrane Type LNG Carrier,' Report of Samsung Heavy Industries Co., Ltd.
  2. Kim, K.G., et al., 1999, 'A Study on the Unsteady State Thermal Analysis of the MARK-Ⅲ Type LNG Tank during Ballast Voyage,' Spring Proceedings of the Korean Society of Mechanical Engineers, Pusan, pp. 171-176
  3. Lee, J.H., et al., 1999, 'A Study on the Thermal Analysis of the MARK-Ⅲ Membrane Type LNG Carrier at Steady State during Laden Voyage,' Spring Proceedings of the Korean Society of Marine Engineers, pp. M-99-M-104
  4. Chung, H.S., Jeong, H.M., Kim, K.G. and Ro, S.T., 1999, 'The Turbulent Natural Convection in Membrane Type LNG Carrier Cofferdam,' Transaction of Korean Society of Mechanical Engineers, Vol. 23, No. 2, pp. 281-287
  5. Song, S.O., Lee, J.H., Jun, H.P., Sung, B.Y., Kim, K.G. and Kim, S.G., 1999, 'A Study on the Three- Dimensional Steady State Temperature Distributions and BOR Calculation Program for the Membrane Type LNG Carrier,' Journal of Korean Society of Marine Engineers, Vol. 23, No. 2, pp. 140-148
  6. Kim, K.G., Chun, B.I., Lee, J.H., Song, S.O., Kim, K.S. et al., 1997/1998, 'Thermal Design and Manufacturing Technology for LNG Carrier,' ITEP, Gongkiban Report
  7. Suhas V. Patankar, 1988, 'Numerical heat transfer and fluid flow,' Dae-Han Book Co., pp. 46-85

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