Numerical analysis of hydrogen ventilation in a confined facility with various opening sizes, positions and leak quantities

Jaewon Lee, Seungsik Cho, Chanho Park, Hyungtae Cho, Il Moon

Research output: Chapter in Book/Report/Conference proceedingChapter

8 Citations (Scopus)


When designing equipment operated by hydrogen as an energy source, safety issues should be considered due to the following physical and chemical properties of hydrogen: hydrogen embrittleness, wide range of flammability limit (4 ~ 75 vol%) and low minimum ignition energy (0.02 mJ). Therefore, it is important to predict the behavior of hydrogen when it is released in an enclosed system. Much research has been conducted to identify hydrogen behaviors and to develop standards and regulations for hydrogen facilities. However, due to the lack of standards and regulations in Korea with respect to hydrogen facilities safety, alternative regulations have been commonly applied: Urban Gas Service Law. Therefore further verification of the effect of hydrogen ventilation is necessary to develop Korean safety regulations around the ventilation systems. In this work, to determine the ventilation requirement in an enclosure system, computational fluid dynamics (CFD) model was developed. To assess the effect of ventilation, further simulations based on the experimental data of HYPER project (installation permitting guidance for hydrogen and duel cells stationary applications) were conducted with a broad range of operating conditions. As a result, the case with crossed ventilation location was the most effective configuration to reduce hydrogen concentration in the system. For other conditions, most of the cases exceeded 1% of hydrogen concentration in an enclosure. In conclusion, the bulk of cases required further reduction of hydrogen concentration and additional measures such as forced ventilation. These results will be a good reference for establishing a standard with regards to safety issues of hydrogen industries and facilities.

Original languageEnglish
Title of host publicationComputer Aided Chemical Engineering
PublisherElsevier B.V.
Number of pages6
Publication statusPublished - 2017 Oct

Publication series

NameComputer Aided Chemical Engineering
ISSN (Print)1570-7946

Bibliographical note

Publisher Copyright:
© 2017 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Computer Science Applications


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