The sensing-based adaptive risk mitigation of leaking hydrogen in a partially open space

Kazuo Matsuura, Masami Nakano, Jun Ishimoto

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)


This study performs the numerical simulation of hydrogen dispersion in a partially open space. The space under investigation measures 2.9 m × 1.22 m × 0.74 m and a leak flow rate of 2 standard cubic feet per minute is assumed. The effects of various roof vent positions and their areas on the ability to recognize the dispersion and accumulation of hydrogen, and its natural ventilation, are shown and discussed. Based on the results, this paper proposes an innovative approach to the sensing-based adaptive risk mitigation control of hydrogen dispersion and accumulation in a partially open space. By adaptively opening roof vents near the leak source, and closing other neighboring roof vents, concentrated hydrogen is exhausted rapidly and efficiently. It is also shown that cases exist where sufficient area of the proposed adaptive roof vent can be determined by the finite-time sensing of hydrogen concentration near the roof. The effects of the delay time of a sensor, and a method to cancel these effects, are also discussed.

Original languageEnglish
Pages (from-to)8770-8782
Number of pages13
JournalInternational Journal of Hydrogen Energy
Issue number20
Publication statusPublished - 2009 Oct


  • Computational fluid dynamics
  • Control
  • Risk mitigation
  • Sensing
  • Ventilation


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