buradan - Yangın

TÜYAK BİLDİRİLER KİTABI
2009 PROCEEDINGS BOOK
Fire was ignited and 3 minutes pre-burn was allowed before
system was discharged. From the graphs we can see a very fast
temperature reduction on the vicinity of the fire and in all sections in
the tunnel short after water mist discharge (Figure 11).
6
Temperature at +5m
Temperature [°C]
500
400
300
200
100
0
1400 1900 2400 2900
TÜYAK 2009
Tc[5-4-2] Tc[5-4-3] Tc[5-4-4]
Tc[5-4-5] Henget Tønne
Ledig
Time [s]
Figure 11. Diesel pool fire temperature profile at +5 m section
Target wood pallet didn’t ignite and water bucket temperature
increase was very small confirming system capability to prevent
fire spread.
Fire was completely extinguished in about 20 seconds from system
discharge and visibility was clearly improved.
The drop in air velocity close to the ceiling is due to back layering,
which stops at activation of suppression (Figure 12).
Figure 12. Diesel pool fire temperature air velocity at -40 m
section
50 MW Potential Wood Crib:
180 pallets were placed in two lanes simulating a lorry. Total length
was 4.2 m and height 2.6 m (18 pallets). (Figure 13)
Figure 13. 50 MW Wood crib fire configuration (side view)
Target wood pallet and water bucket were also placed at same
locations as previous test.
Fire was ignited and about 5 minutes pre-burn (temperature
at ceiling reach rapidly to 1000 °C) was allowed before system
was discharged (Figure 15). Heat release reached around 45
MW before water mist system was discharged so fire was fully
developed. From the graphs we can see a very fast temperature
reduction on the vicinity of the fire and in all sections in the tunnel
after water mist discharge.
Figure 14. 50 MW Wood crib fire temperature air velocity at -40
m section
Figure 15. 50 MW Wood crib fire temperature profile at +5 m
section
Target wood pallet didn’t ignite and water bucket increase was very
small.
Fire was successfully suppressed and visibility was clearly
improved.
100 MW Potential Wood Crib:
Last test was a 100 MW potential wood crib fire. Main purpose of
this test was to evaluate water mist system capability to control
fire that eventually could grow up to 100 MW. Water mist system
was discharged before fire was fully developed. Heat released was
around 50 MW at discharge time.
360 pallets were placed in two lanes simulating a lorry. Total length
was 8.4 m and height 2.6 m (18 pallets). (Figure 16)
Target wood pallet and water bucket were also placed.
Fire was ignited and about 5 minutes pre-burn (temperature at
ceiling reach rapidly to 1000ºC) was allowed before system was