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Release and dispersion of heavy gases - experimental results and numerical simulations

  • Heavy gases in large quantities are used worldwide in various industries. Past incidents, such as the liquefied gas disaster in Viareggio (2009) have shown that these materials are difficult to handle in a safe manner. According to the German Hazardous Incident Ordinance (StörfallVO 2000 - 12. BImSchV) plant operators with 'extended responsibilities' must produce a report in which they verify that, in the event of an unintentional gas release, the surrounding area will not be aversely affected. The essential elements of this report include calculations of both released mass flow and gas dispersion. Using models such as the VDI guideline 3783 (state of the art in Germany) plant operators are able to predict the characteristics of likely gas dispersions. Within the framework of the reported experimental trials, the release process of heavy gases from standard gas cylinders was investigated. Using the results of this investigation a calculation methodology has been developed which is ableHeavy gases in large quantities are used worldwide in various industries. Past incidents, such as the liquefied gas disaster in Viareggio (2009) have shown that these materials are difficult to handle in a safe manner. According to the German Hazardous Incident Ordinance (StörfallVO 2000 - 12. BImSchV) plant operators with 'extended responsibilities' must produce a report in which they verify that, in the event of an unintentional gas release, the surrounding area will not be aversely affected. The essential elements of this report include calculations of both released mass flow and gas dispersion. Using models such as the VDI guideline 3783 (state of the art in Germany) plant operators are able to predict the characteristics of likely gas dispersions. Within the framework of the reported experimental trials, the release process of heavy gases from standard gas cylinders was investigated. Using the results of this investigation a calculation methodology has been developed which is able to predict the mass flow of a gas-phase release. As input parameters only the geometry of the gas cylinder, the material properties of the respective fluid as well as the environmental parameters such as velocity of approach and air temperature are required. In the course of modeling various approaches for nucleate boiling have been tested for their applicability. Both the calculation methodology and a comparison between the calculated and experimental results will be presented. Within the same framework of experimental trials, the dispersion process of the aforementioned heavy gases was also investigated. The dispersed gas cloud in this case was considered as originating from a continuous point source under ambient conditions. For the various trials concentrations both in the heavy gas (≥ 1 vol.-%) and in the neutral gas field (≤ 3000 ppm) were measured. In the immediate area of the release the length, width and height of the heavy gas cloud were evaluated. The experimental results, comparison calculations and the measurement techniques will be presented.zeige mehrzeige weniger

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Metadaten
Autor*innen:Christian Rauchegger, Volkmar Schröder, Volkmar Lohse, Dirk Schmidt, D. Thévenin
Dokumenttyp:Beitrag zu einem Tagungsband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):8th Global congress on process safety - GCPS (Proceedings)
Jahr der Erstveröffentlichung:2012
Herausgeber (Institution):American Institute of Chemical Engineers
Ausgabe/Heft:Paper 104aq
Erste Seite:1
Letzte Seite:16
Freie Schlagwörter:Gas Dispersion; Gas releases; Heavy gases; VDI Guideline 3783
Veranstaltung:8th Global congress on process safety (GCPS)
Veranstaltungsort:Houston, TX, USA
Beginndatum der Veranstaltung:2012-04-01
Enddatum der Veranstaltung:2012-04-05
URL:https://www.researchgate.net/publication/267345315_Release_and_Dispersion_of_Heavy_Gases_-_Experimental_Results_and_Numerical_Simulations
ISBN:978-0-8169-1071-7
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Sonderstandort: Publica-Schrank
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein
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