Smoke extraction rate calculation of underground lift-sliding stereo mechanical garages

Analyses the fire risk of underground stereo mechanical garage. Based on the spatial structure characteristics of lift-sliding stereo mechanical garage, establishes a window plume calculation model suitable for the smoke extraction rate. Using fire dynamics simulation, establishes a model of the underground stereo garage, and analyses the smoke extraction efficiencies calculated by the window plume method and the air change rate method, respectively. The results show that the fire development in the fired park unit is less affected by the smoke extraction rate. And the results of other indicators such as the visibility and the gas temperature in the car transfer channel and the CO concentration in the garage under the same fire conditions using window plume simulation are all better than those using air change rate method, which provides a higher safety assurance for firefighters.