Share

IIR document

Hydrogen re-liquefaction process for boil-off gas handling on a large-scale liquid hydrogen carrier.

Number: 132

Author(s) : KIM D., TRAEDAL S., BERSTAD D., NEKSA P., YUM K. K.

Summary

With the recent focus on hydrogen, seaborne shipping is considered an option for the large-scale transport of liquid hydrogen (LH2). For efficient shipping, boil-off gas (BOG) from the cargo tanks needs to be optimally utilized. This work suggests a BOG handling system (BHS) producing fuel for an LH2 carrier and liquefying excess BOG in a hydrogen Claude cycle. The process offers a simple configuration that does not require a refrigerant makeup facility. The simulation results of the BHS also show relatively low specific power consumption (5.7 to 2.6 kWh/kgLH2) with a good utilisation of cold energy in BOG. The sensitivity analysis with the BOG to fuel (BtF) ratio shows that a higher BtF gives a simpler configuration and a smaller size liquefier, saving capital costs. However, the optimal capacity of the BHS needs to be determined based on the techno-economic performance of the entire system of the LH2 carrier. 

Available documents

Format PDF

Pages: 7 p.

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Hydrogen re-liquefaction process for boil-off gas handling on a large-scale liquid hydrogen carrier.
  • Record ID : 30031055
  • Languages: English
  • Source: Proceedings of the 17th IIR International Conference on Cryogenics, Desden, Germany, april 25-28 2023
  • Publication date: 2023/04/25
  • DOI: http://dx.doi.org/10.18462/iir.cryo.2023.0132

Links


See other articles from the proceedings (33)
See the conference proceedings

Indexing