Abstract
We investigated a fire accident which was caused by an ammonia coolant pipes’ removal operation. Fire investigation at the scene of the accident determined that the corridor was adequately ventilated, with the fastest wind speed at approx. 1.62 m/s near the corridor area of storage room R8, but the ventilation of the top area within storage room R8 was extremely inadequate, measuring a wind speed of nearly 0.0 m/s. The use of natural ventilation was incapable of removing the ammonia gas accumulated near the ceiling of the storage room, thus resulting in a fire and casualties among the personnel. Fire dynamics simulator (FDS) was used to simulate the corridor and ceiling wind speed as 1.7 and 0.0 m/s in the same scene. The results proved that FDS is proper tool to reconstruct the ammonia fire accident.
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