Smoke removal in uni-storey smoke control system

There is pronounced interest of engineers in new systems for storey smoke control system.The operational principle of this system is based on independent smoke removal from each storey. Independent ducts with fans and outlets are built for each floor of the building. For this approach it is important to safety remove smoke from the building. One of the proposed approaches is to use nozzle type outlets characterized with high flow and velocity to evacuate combustion products from the building. At the same time, due to system safety requirements it is crucial to dispose combustion products at a distance from building walls. The research interest in smoke removal systems at the Warsaw University of Technology was recently oriented for testing smoke outlets. The primary focus was on analysis of the performance of these elements taking into account flows, diameters and throws with respects to those typically applied in smoke removal systems. Therefore, in contrary to typical diffusers tests our studies included long-throw jets. The air streams generated by ventilation nozzles working as torch outlets were examined in the spacious (high cubic capacity) hall using specially prepared test site. Obtained results were used as a basis for evaluation of effectiveness ofsmoke removal for the smoke removal system operation.