Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지
DOI QR코드

DOI QR Code

Optimal Shape and Boil-Off Gas Generation of Fuel Tank for LNG Fueled Tugboat

  • Kim, Jung-Woog (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jeong, Jin-yeong (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Chang, Dae-Jun (Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2019.11.19
  • Accepted : 2020.02.14
  • Published : 2020.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

This paper proposes the optimal shape of an LNG fuel tank with a lattice pressure vessel (LPV) design for a tugboat. The LPV is a Type C tank with a design philosophy of "design by analysis," which facilitates greater variability of shape compared with other traditional Type C tanks. Further, compared with conventional cylindrical fuel tanks, the LPV provides better volumetric efficiency. Considering the shape of a fuel tank room, a trapezoidal shape of the LPV is concluded as the most optimal design. This study performs two major analyses of the LPV: structural and heat transfer analyses. First, a design procedure of the LPV based on structural analyses is elaborated. The finite element method is used for the analyses. Furthermore, the results guarantee that the maximum stresses by applied loads do not exceed an allowable stress limitation. Second, the heat transfer analysis of the LPV is conducted. LNG boil-off gas generation is analyzed based on various insulation materials and the degree of acuum.

Keywords

References

  1. Ahn, J.K., Choi, Y.S., Jo, C.H., Cho, Y.H., Chang, D.J., Chung, H., ... & Bergan. (2017). Design of a Prismatic Pressure Vessel with Internal X-beam Structures for Application in Ships. Ships and Offshore Structures, 12(6), 781-792. https://doi.org/10.1080/17445302.2016.1247487
  2. ASME. (2013). BPV Code Section VIII Division 2: Alternative Rules - Design and Fabrication of Pressure Vessels.
  3. DNV-GL. (2019). Alternative Fuels Insight Platform (AFI). Retrieved November 2019 from https://store.veracity.com/da10a663-a409-4764-be66-e7a55401275a
  4. Fesmire, J.E. (2015). Standardization in Cryogenic Insulation Systems Testing and Performance Data. Physics Procedia, 67, 1089-1097. https://doi.org/10.1016/j.phpro.2015.06.205
  5. IGC. (2014). International Code of Safety for Ships using Gases or Other Low-Flashpoint Fuels. Retrieved November 2019 from http://www.imo.org/en/KnowledgeCentre/IndexofIMOR esolutions/MSC%20Resolutions/MSC%20370%2093.pdf
  6. IGF. (2015). International Code of Safety for Ships using Gases or Other Low-Flashpoint Fuels. Retrieved November 2019 from http://www.imo.org/en/KnowledgeCentre/IndexofIMOR esolutions/Maritime-Safety-Committee-(MSC)/Documents/MSC.391(95).pdf
  7. International Maritime Organization (IMO). (2018). Report on the Marine Environment Protection Committee on Its Seventysecond Session. Marine Environment Protection Committee (MEPC) 72th Session, Retrieved November 2019 from http://www.crs.hr/Portals/0/docs/eng/imo_iacs_eu/imo/mepc_reports/MEPC%2072%20-%20Report.pdf?ver2018-06-29-140230-617
  8. Ivica A., & Ante S. (2015). Influence of the Required EEDI Reduction Factor on the $CO_2$ Emission from Bulk Carriers. Energy Policy. 84, 107-116. https://doi.org/10.1016/j.enpol.2015.04.031
  9. Kifune, H., & Nishio, T. (2015). A Study of Fuel Consumption Model Using Tugboat's Propulsion System. Journal of the Japan Institute of Marine Engineering, 50(4), 527-534. https://doi.org/10.5988/jime.50.527
  10. Lee, J.M., Choi, Y.S., Jo, C.H., & Chang, D.J. (2017). Design of a Prismatic Pressure Vessel: an Engineering Solution for Non-stiffened-type Vessels. Ocean Engineering, 142, 639-649. https://doi.org/10.1016/j.oceaneng.2017.07.039
  11. Tseng, C.J., Yamaguch, M., & Ohmori, T. (1997). Thermal Cconductivity of Polyurethane Foams from Room Temperature to 20 K. Cryogenics, 37(6), 305-312. https://doi.org/10.1016/S0011-2275(97)00023-4