Safety evaluation on ammonia-fueled ship: gas dispersion analysis through vent mast

Hayoung Jang, M.P. Mujeeb-Ahmed*, Haibin Wang, Chybyung Park, Insik Hwang, Byongug Jeong, Peilin Zhou, Astrinos Papadakis, Alexandros Giannakis, Konstantinos Sykaras

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

The maritime industry is exploring ammonia as an alternative fuel to reduce greenhouse gas emissions. However, the high toxicity of ammonia poses significant safety challenges for onboard handling and storage. This study investigates ammonia dispersion and toxicity levels from vent mast releases on ships, aiming to enhance safety measures for future ammonia-fueled vessels. Using CFD analysis on a 31,000-dwt general cargo ship model, the research examines various release scenarios, considering regulatory requirements, vent mast design, and environmental conditions. Results show that direct ammonia release from the vent mast poses fatal risks to the crew in the accommodation area and on adjacent ships, regardless of current regulatory stipulations. The study recommends installing an ammonia-catching system to reduce concentrations to safe levels of 30 ppm before release. These findings offer crucial insights for improving the safety of using ammonia as marine fuel through risk assessment and management.
Original languageEnglish
Pages (from-to)1060-1077
Number of pages18
JournalInternational Journal of Hydrogen Energy
Volume83
Early online date15 Aug 2024
DOIs
Publication statusPublished - 19 Sept 2024

Keywords

  • toxicity
  • vent mast
  • regulations
  • safety considerations
  • gas dispersion
  • ammonia-fueled ship

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