of these cases were as follows: closing all of the fans, all the fans
exhausting air and one half of fans exhausting air, the other fans
supplying air, respectively. Their study indicated that it was good
to control soot concentration low and ensure the visibility for the
people evacuation at the stairway when all the fans in the tunnel
area are in exhaust mode. However, when no fan was operated,
soot concentration was low at the trackway. These scholars all
studied the modes of exhaust smoke and found different ventilation
cases have different efficacy on controlling smoke diffusion.
However, during their research, the positions of these ventilation
vents are constant and quantitative analysis and specific setting
of the system are not proposed.
of these cases were as follows: closing all of the fans, all the fans
exhausting air and one half of fans exhausting air, the other fans
supplying air, respectively. Their study indicated that it was good
to control soot concentration low and ensure the visibility for the
people evacuation at the stairway when all the fans in the tunnel
area are in exhaust mode. However, when no fan was operated,
soot concentration was low at the trackway. These scholars all
studied the modes of exhaust smoke and found different ventilation
cases have different efficacy on controlling smoke diffusion.
However, during their research, the positions of these ventilation
vents are constant and quantitative analysis and specific setting
of the system are not proposed.
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