HSE announces new software product

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Quadvent is a mathematical model of a flammable gas jet release that can be used as part of a hazardous area classification exercise under the Dangerous Substances and Explosives Atmospheres Regulations (DSEAR).

It can model releases of flammable gas either in a ventilated enclosure or outdoors.

The model was originally developed by HSL experts in 2011 for calculating the flammable gas cloud volume (Vz) as a scientifically based alternative to the method described in the international standard on area classification IEC EN60079:10-1.

HSL has now developed Quadvent into a software program that is easy to use, quick to run and allows the user to obtain realistic estimates of Vz for a given gas, pressure and hole size and it can take into account the effects of ventilation by specifying the room volume and ventilation rate.

Quadvent also provides estimates of the ventilation rate of naturally ventilated enclosures through a relatively simple model based on the effects of buoyancy and wind driven ventilation.