During the evacuation period, the jet fan ventilation must be switched off to prevent mixing of air and smoke. By running the exhaust, supply and jet fans at full speed after evacuation is complete, the spread of smoke can be kept within a limited area. The fire also remains visible at all times. Meer weergeven For many years, NOVENCO has supplied fans for road tunnels, and their design and further development have often taken place in close cooperation with the authorities. Since 1994, NOVENCO has put this … Meer weergeven Ventilation is the transport of air. To transport air a mass must be moved. At 20°C, the density of air is approx. 1.2 kg/m³. Ventilating 10 m³ air therefore involves moving a mass of 12 kg. Air can be moved in … Meer weergeven In conventional ventilation systems, all air is drawn through fans and ducting. This applies to both the fresh air supplied and the discharged spent air. To prevent pressure drop, air velocity is kept as low as possible. … Meer weergeven Regarding ventilation systems, there are two types of car parks: open and enclosed car parks. Even car parks which are situated above ground can be an enclosed car park if there is insufficient natural ventilation. Meer weergeven Web- outlet cross section of jet fan [m2] and outlet jet velocity [m/s]; • L2,, - distances ante- and post- jet fan location and total distance of the sector [m]. Fig. 2. Tunnel sector with a Jet fan The real flow in a sector with jet fan is three dimensional. One two-dimensional top view is shown on Fig. 3. The distance
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