What Is a Tunnel Jet Fan? Tunnel Ventilation and Smoke Control
A tunnel jet fan uses a high-velocity discharge to move the main air mass along the tunnel. By positioning multiple fans at appropriate intervals, a controlled longitudinal airflow can be created.
How does a tunnel jet fan work?
A tunnel jet fan uses a high-velocity discharge to move the main air mass along the tunnel. By positioning multiple fans at appropriate intervals, a controlled longitudinal airflow can be created.
Its role in normal ventilation
It contributes to the airflow required to limit the accumulation of traffic-related pollutants inside the tunnel. With sensors and automation, the system can be operated in stages according to actual demand.
Why is it critical during a fire?
In a fire, the objective is not only to remove smoke but also to control its movement in the designed direction. The fan’s emergency operating scenario and suitability for high-temperature conditions therefore need to be assessed during the design stage.
Which criteria are considered for selection?
Tunnel length and cross-section, traffic load, target air velocity, required thrust, fan spacing, airflow direction, noise limits and the fire scenario should be considered together.
Vitlo TUNEL-AXF
Vitlo TUNEL-AXF is an axial jet fan solution developed for tunnel ventilation and smoke-control applications. Project-specific selection should be made according to system data and the required operating scenario.