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Heat Transfer Analysis and BOG Estimation of Membrane-Type LNG Cargo during Laden Voyage

멤브레인형 LNG선 Cargo의 만선항해시 열전달 해석 및 BOG 평가

  • 허진욱 (부산대학교 대학원 기계설계공학과) ;
  • 이영주 (부산대학교 대학원 기계설계공학과) ;
  • 조진래 (부산대학교 기계기술연구소) ;
  • 하문근 (삼성중공업(주) 조선사업부) ;
  • 이중남 (삼성중공업(주) 조선사업부)
  • Published : 2003.03.01

Abstract

Excessive generation of BOG during the LNG transportation not only causes the severe financial loss but also leads to the unexpected disaster. Therefore, the carrier cargo insulating interior LNG should be carefully designed based upon an accurate heat transfer analysis. However. it is not simple to analyze heat transfer of LNG cargo, because it is in a complex insulation structure and LNG carrier experiences a complicated heat transfer according to various kinds of voyage conditions. In this paper, we carried out the transient finite element heat transfer analysis for a cargo of Mark-111 membrane-type LNG carrier during laden voyage, and we compared heat transfer rates between considering natural convection and considering conduction. For this goal, we developed a PCL program incorporating with a commercial MSC/NASTRAN FEM code.

Keywords

LNG;FEM;Homogenization;Laden Voyage;Insulation;Boil-Off Gas;Boil-Off Ratio

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