Dilution in pressurized enclosures – critical points

The risk of explosion can occur in all activities involving flammable substances which, when mixed with air, form an explosive atmosphere. Explosion protection is intended to prevent the ignition atmospheres. Pressurization, as a type protection, 'p' based on introduction protective gas (air or inert gas) enclosure formation atmosphere within by maintaining overpressure relative surrounding and, where necessary, use dilution. important tests for pressurization are filling and purging test. Each these involves monitoring certain points pressurized confirm that concentrations acceptable limits. location be identified using computer simulations. This results, so-called critical points, concentration lastly reaches pre-set values. These bring advantage need monitor at much smaller number thus it increasing accuracy tests. Following approach work experiments carried out, was found simulation effective establishing points.