Defines plugholing in smoke ventilation systems as the unwanted phenomenon whereby an exhaust ventilator draws clean air from below the smoke layer, so that the ventilator exhausts a mixture of smoky gases from the smoke layer and clean air from below the smoke layer. Notes the need to take this into account in time-dependent smoke-filling calculations. Proposes a calculation method which shows that plugholing can have a significant effect on such calculations and that it is strongly dependent on the circumstances of the fire growth and of the building geometry.
Primary Author(s): Morgan H, Compton P
Source: Bldg. Serv. J. CIBSE, May 2002, vol.24, no.5, 60-62, 4 figs, 5 refs.
BSRIA Abstract Doc 000103644 Abs 20020678
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