Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Development of Strength Evaluation Methodology for Independent IMO TYPE C Tank with LH2 Carriers

  • Beom-Il, Kim (Ship & Offshore Technology Team, Korean Register) ;
  • Kyoung-Tae Kim (Ship & Offshore Technology Team, Korean Register) ;
  • Shafiqul Islam (Ship & Offshore Technology Team, Korean Register)
  • Received : 2024.02.27
  • Accepted : 2024.04.23
  • Published : 2024.06.30
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Abstract

Given the inadequate regulatory framework for liquefied hydrogen gas storage tanks on ships and the limitations of the IGC Code, designed for liquefied natural gas, this study introduces a critical assessment procedure to ensure the safety and suitability of such tank designs. This study performed a heat transfer analysis for boil-off gas (BOG) calculations and established separate design load cases to evaluate the yielding and buckling strength. In addition, the study assessed methodologies for both high-cycle and low-cycle fatigue assessments, complemented by comprehensive structural integrity evaluations using finite element analysis. A comprehensive approach was developed to assess the structural integrity of Type C tanks by conducting crack propagation analysis and comparing these results with the IGC Code criteria. The practicality and efficacy of these methods were validated through their application on a 23K-class liquefied hydrogen carrier at the concept design stage. These findings may have important implications for enhancing safety standards and regulatory policies.

Keywords

Acknowledgement

This research was a part of the project titled 'Technology application of design and exclusive materials for hydrogen cargo containment mock-up (Project NO. 20019043)', funded by the Ministry of Trade, Industry and Energy, Korea.

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