Numerical Simulations on Sprinkler System and Impulse Ventilation in an Underground Car Park

As more and more underground car parks are built in the city, it is important to design an good fire protection system. Nowadays, many car parks use the impulse ventilation system to control smoke when fire takes place. In order to study the smoke control of impulses ventilation during car park fires when sprinkler system is installed, FDS is used to simulate the smoke temperature, concentration and activated sprinkler number during the fire. It is found that with the impulse ventilation, there would be much less smoke upstream the fire, which is favorable for firefighters to put out the fire. Besides there would be much less sprinklers activated with impulse ventilation system, which will help to stable the water pressure of the sprinkler system.