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Saturday 11 July 2009

Pool Fire



Gasoline was distributed by a transmission pipeline to the next transmission station and then carried away to the Public Gas Station by a tanker truck. Since the distribution process by a pipeline is very vulnerable, so a leak may happen and then the gasoline will spilled out, and the consequence is it will form a pool that have a potential to become a Pool fire.


Other Fire Modelling Packages

Several specialist fire packages have been recently developed:
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1. CHIC - compartment fires
CHIC (Combustion Hazards In Compartments18) is a time dependent model which predicts the physical effects arising from the confinement of a jet or pool fire in a compartment, e.g. an offshore module. Internal heat fluxes, smoke layer thickness and temperature, CO and soot concentration and the extent, if any, of external flaming are predicted. The model has been validated by experimental work using propane, diesel and gas condensate as fuel.

2. SEAFIRE - fires on the sea
SEAFIRE predicts the behaviour of a subsea release of product at sea, from e.g. a broken pipeline. The release may occur above/on or below the sea surface and for the latter a new model predicts the behaviour of the rising bubble plume and subsequent surface spreading due to wind, waves and gravitational effects. Release products may be mixtures of gas and oil. The fire characteristics of the burning pool are based on experiment. Run time graphics show the development of fire with time.

3. CLOUDF - cloud or flash fires
Cloud or flash fires are transient in nature and are the product of the delayed ignition of a dispersing cloud in an unconfined environment. Two types of cloud fire are modelled19 with radiation dose predictions being supplied at user specified locations. The first is the delayed ignition of the cloud formed from a vertical release. This results in a fireball dying back to a steady state jet flame from the source. The second is the delayed ignition of the cloud formed from a horizontal negatively-buoyant release. Such a flame, when not accelerated by obstacles, will travel horizontally through the cloud at relatively low speeds (less than 20 m/s). Because of the short duration of the fire, radiation effects are generally not significant outside the burning cloud.

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