The new Gotthard Base Tunnel will be used by passenger and freight trains, whereby the latter ones may carry heavy good vehicles with large fire loads of up to 250 MW. As a case study, the impact of these fires was studied with respect to the mechanical smoke extraction, the resulting concrete and air temperatures, and their influence on airflow and subsequent fan operation points. One-dimensional flow simulations combined with a radial shell and a linear layer model for concrete temperature simulation were performed. The following topics will be addressed in the article: Modelling of 40 and 250 MW fires, the smoke extraction system and the entire concrete plenum system. Air and concrete temperatures in the smoke exhaust plenums and requirements for the concrete structure and technical equipment, such as doors and exhaust fans. Heat fluxes and balances throughout the duration of the fire. Impact on the overall pressure loss, volume and mass flows, and operating points of the smoke exhaust fans. Simulation of further effects, such as buoyancy and heat penetration into walls of concrete. Impact on the design of the smoke exhaust fans and the concrete structure. Measures to ensure the function of the smoke exhaust fans.


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    Titel :

    Mechanical smoke extraction for large fire loads in the gotthard base tunnel


    Weitere Titelangaben:

    Mechanischer Rauchabzug für große Brandlasten im Gotthard-Basistunnel


    Beteiligte:
    Brander, C. (Autor:in)


    Erscheinungsdatum :

    2012


    Format / Umfang :

    7 Seiten, 9 Bilder, 1 Quelle



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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