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    Datenpaket: Electrostatic Ignition (Summary of experiment series E4.3 results)

    Alternativer Identifier:
    (KITopen-DOI) 10.5445/IR/1000136330
    Verwandter Identifier:
    -
    Ersteller/in:
    Lyons, K. [Lyons, K.]

    Hooker, P. [Hooker, P.]
    Beitragende:
    -
    Titel:
    Electrostatic Ignition (Summary of experiment series E4.3 results)
    Weitere Titel:
    -
    Beschreibung:
    (Abstract) Work package four of the PRESLHY project focuses on ignition phenomena. This report summarises the experimental series E4.3, which focuses on the propensity for an electrostatic charge capable of igniting a hydrogen cloud to be generated during a release, or accidental spill scenario. Seven experiments measuring the electric field of a multiphase hydrogen jet were conducted at the HSE Science and Research Centre. Current measurements on an electrically isolated section of steel pipework were also taken during a total of 30 large scale releases. The results from the plume measurements indicate that the multiphase hydrogen jet itself does not create a significant charge, but certain interactions with the air can cause intermittent spikes in field strength. In particular, air in the pipework being ejected and solidified air forming around the release point, breaking off and flowing downstream appear to be the cause of the electrical fields measured in these experiments. This effect could be larger with different initial conditions either at the nozzle or in the tanker. The wall current measurements were more consistent, as the ability for LH 2 to induce a current on a section of electrically insulated pipework was clearly demonstrated. This charge is a complicated function of the phase of LH 2 in the pipework, the turbulence of the flow, and the resistance to ground of the section of the pipework. Frost formation on the outside of the pipework dynamically changed the resistance to ground throughout each trial, making interrogation of the results difficult. The experiments show that electrostatic charges do pose a credible hazard when considering LH 2 facilities. The charging, however, does not form inside the hydrogen, but on the substances or objects that the hydrogen interacts with. For a fixed facility, maintaining continuity to earth, paying attention to objects in the potential path of a release, would limit the likelihood of electrostatic charging and therefore limit the hazard.
    (Technical Remarks) files consists of data from following sensors, obtained during experiments: • rugged field meter IDB systems I • static field meter IDB systems • electrometer • resistance meter station • pipework thermocouples T • pressure sensor • mass flow sensor • near‐field weather station • far‐field wind sensor • far‐field humidity sensor
    Schlagworte:
    FAIR data management
    pre-normative research
    experimental data
    accessibility
    re-use
    long-term data storage
    research data repository
    liquid hydrogen
    accidental behaviour
    release
    ignition
    combustion
    electrostatic
    Zugehörige Informationen:
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    Sprache:
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    Herausgeber/in:
    Karlsruhe Institute of Technology
    Erstellungsjahr:
    Fachgebiet:
    Engineering
    Objekttyp:
    Dataset
    Datenquelle:
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    Verwendete Software:
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    Datenverarbeitung:
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    Erscheinungsjahr:
    Rechteinhaber/in:
    Lyons, K.

    Hooker, P.
    Förderung:
    -
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    Status:
    Publiziert
    Eingestellt von:
    kitopen
    Erstellt am:
    Archivierungsdatum:
    2023-06-23
    Archivgröße:
    4,4 MB
    Archiversteller:
    kitopen
    Archiv-Prüfsumme:
    78841b746184ad44117cef376a3e4e64 (MD5)
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