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US 6,779,413 B1Granted
Clean room fire simulation
AssigneeFM Global Technologies, LLC
InventorGunnar Heskestad
Life of this patent
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AssigneeFM Global Technologies, LLC
InventorGunnar Heskestad
Estimating the term…
In a fire simulation system, a fire in a clean room is simulated. A material of the type that would burn in the clean room fire is burned in a burn cell and air and combustion products are circulated through the burn cell and a secondary exposure cell in parallel. Clean room filters are provided at the top of the burn cell and the secondary exposure cell and both cells have perforated floors. A primary exposure loop may also be connected in the circulation system to receive unfiltered air and combustion products from the bum cell. The material and/or equipment to be tested for fire damage is placed in the secondary exposure cell and/or the primary exposure loop for a predetermined time and then is removed from the cell and exposed to a controlled humidity. Following the controlled humidity exposure, the material and/or equipment is evaluated for damage.
A clean room fire simulation system comprising a burn cell adapted to burn material therein, a secondary exposure cell adapted to have material or equipment to be evaluated for damage placed therein, a circulation system arranged to circulate air and combustion products from said burn cell through said secondary exposure cell, a clean room filter arranged to filter the air and combustion products as they enter said secondary exposure cell, and a monitor in said secondary exposure cell for monitoring the concentration of a predetermined gas generated by the burning of the material in said burn cell.
A clean room fire simulation system comprising a burn cell adapted to burn material therein, a secondary exposure cell adapted to have a material or equipment to be tested for damage placed therein, a circulation system arranged to circulate air and gas through said burn cell and said secondary exposure cell in parallel, clean room filters arranged to filter the air and combustion products circulated through said burn cell and said secondary exposure cell, said circulation system including a duct immediately downstream from said burn cell to receive unfiltered combustion products from the burning of material in said burn cell, a loop connected to said duct and arranged to have some of the air and unfiltered combustion products in said duct pass through said loop, an exposure site in said loop adapted to receive material and/or equipment to be evaluated for fire damage and arranged to be brought into contact with the combustion products in said loop.
A method of evaluating damage from a clean room fire comprising selecting a material which may be burned in a clean room fire, burning said material in a burn cell, placing a test material or equipment in a secondary exposure cell, circulating air and combustion products from said burn cell through a clean room filter and then through said secondary exposure cell to expose said test material and/or equipment to said combustion products and evaluating the damage to said test material and/or equipment.
Dependencies are inferred from the claim text.