Fire Simulation of a Car Park to Optimize Fire Ventilation Systems


Authors : Dr. Venkatesh T Lamani; Angshuman Bhattacharya; Abhishek Krishnan'; Anant Alok

Volume/Issue : Volume 6 - 2021, Issue 9 - September

Google Scholar : http://bitly.ws/gu88

Scribd : https://bit.ly/3FklfFy

Fires in underground car parks are dangerous for they are isolated with confined quarters. Smoke, Fumes and Carbon Monoxide generated are dangerous and toxic to human life. Their evacuation via jet fans is an important safety requirement. This has the added benefit for ease of evacuation for fire fighters to tackle the situation safely. A Computational Fluid Dynamics (CFD) simulation was duly made, to represent this scenario for designing the ventilation system, using FDS v6.7. The car park is modelled as a bunker sized 40.125 x 24 x 3.75m, parked cars measuring 4 x 2 x 1.25m. The flow rate for venting from jet fans is set to 1m3 s -1 . The effect of the smoke and heat control system (SHC) on the smoke movement in fire conditions is examined. A comparison between smoke extraction rate and smoke recirculation region was made for various cases. Computational models emphasize that proper location of elements of the ventilation system is crucial to attain high efficiency of fire ventilation. Consequently, evacuation plans can be made by proper estimation of smoke direction and density. Also, temperature rise is analyzed as it has a potential effect on safety of structures.

Keywords : Fire Dynamics; Smoke Propagation; Computational Method; Unsteady Solution; Evacuation Plan; Ventilation System. I

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