Smoke and Gas Ingress Analysis (SGIA) is a study of the smoke and gas engulfment hazardous events which leads to the impairment of non-process buildings, temporary refuge, escape & evacuation routes.
The objective of the smoke and gas ingress analysis is to study the concentration of smoke and gas ingress into the non-process buildings and measure it against the concentration levels that affects personals.
A ventilation model: This uses data from a building/TR pressurization test in conjunction with geometry and weather information to estimate the air change rate for the building/TR under shutdown conditions.
An infiltration model to determine the accumulation of pollutants over time as a function of external concentration and the air change rate.
A toxicity model to determine the effects of pollutants on the occupants and hence the impairment time.
The simulations will be performed with the latest version of the FLACS tool (version 9). FLACS is a well-known and thoroughly validated tool developed for ventilation, dispersion and explosion simulations in complex geometries. FLACS is developed and maintained by GexCon AS in Norway.