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Emergency ventilation of a railway tunnel by jet fans
In case of a fire in a long railway tunnel, an emergency stop of a passenger train at an arbitrary location in the tunnel cannot be excluded. In tunnel systems with two single-track tubes, corresponding to the system adopted by the NEAT in Switzerland, passengers can escape through the cross-passages connecting both tubes. The ventilation of the cross-passages,which are opened for escape, by jet fans installed in the portal regions is an interesting option to be discussed in general. Attention has been focused on the time duration required to obtain full ventilation power in the open cross-passage. The influence of the ventilation effect of the traffic is also discussed. A simplified model has been developed to estimate the air-flow rate in the cross-passage opened for escape.
Emergency ventilation of a railway tunnel by jet fans
In case of a fire in a long railway tunnel, an emergency stop of a passenger train at an arbitrary location in the tunnel cannot be excluded. In tunnel systems with two single-track tubes, corresponding to the system adopted by the NEAT in Switzerland, passengers can escape through the cross-passages connecting both tubes. The ventilation of the cross-passages,which are opened for escape, by jet fans installed in the portal regions is an interesting option to be discussed in general. Attention has been focused on the time duration required to obtain full ventilation power in the open cross-passage. The influence of the ventilation effect of the traffic is also discussed. A simplified model has been developed to estimate the air-flow rate in the cross-passage opened for escape.
Emergency ventilation of a railway tunnel by jet fans
Notfall-Lüftung von Eisenbahntunneln durch Strahllüfter
Kunsch, J.P. (author)
2002
10 Seiten, 8 Bilder, 6 Quellen
Conference paper
English
Tunnel , Tunnelbau , Eisenbahn , Lüftung , Entlüftung , Lüftungsanlage , Lüfter , Brandbekämpfung , Brandschutz
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