Study of the Behavior of Wall Sandwich Panels Irrigated with a Drencher Curtain at the Unilateral Thermal Exposure


Annotation:

In the last ten years, drencher curtains are widely used at the large production facilities to increase fire resistance of the building structures. The length of the drencher curtains used as a compensating measure instead of fire walls can reaches 250 m. 

A three-dimensional modeling of the operation of a drencher curtain together with a type 1 fire barrier in the form of a sandwich panel was performed. FireCat software package was used for modeling.  One of its components is the PyroSim software package designed for fire modeling. A field model was chosen as a mathematical model of fire development.

A number of simulations was carried out at a given sprinkler flow rate of 1 l/s, but at different distances between the sprinklers (different number of sprinklers operating in one stream was used) — from 0.5 to 5 m. 

As a result, it is established that when sprinklers are placed at a distance of no more than 2.5 meters from each other, the model meets the fire resistance requirements for type 1 fire walls.

The experiments were carried out in the irrigation intensity range of 0.1–0.5 l/s·m. It is established that in order to achieve fire resistance limit REI 150, the irrigation intensity must be at least 0.37 l/s·m.

The studies carried out made it possible to obtain qualitative data on the efficiency of drencher curtains plaсed in one line as a measure to increase the time limits of fire resistance of fire barriers from 45 to 150 minutes.

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DOI: 10.24000/0409-2961-2022-2-27-31
Year: 2022
Issue num: February
Keywords : flame retardness building structure sandwich panel drencher curtain fire curt 3D modeling heating intensity
Authors: