fire fighting system slide
TRANSCRIPT
8/7/2019 Fire Fighting System Slide
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Fire Fighting Installation System
Fixed fire fighting systems are highly desirableand effective, as they are immediately
available and will normally have been designed tomeet the particular risk in the
premises concerned.
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Building characteristic
Shopping
complexBasement
Commercial area
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Factors that have an influence on the level
of fire fighting installation offered by thisbuilding.
Nu
mbers and types of fire starts Likelihood of fire suppression by occupants
Reliability and effectiveness of the detection
and alarm system
Communication system
Reliability and effectives of the sprinkler system
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Smoke detection system
Automatics suppression
For detection
Fire fighting for the occupants
Fire fighting for the brigade
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Operation of wet pipe sprinkler
systems and fire detection
systems
Wet pipe sprinkler systemoperation.
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Components of a FireSprinkler System Installation
1.Water Source
2.Back
flow
preventer
3.Control
valve 4.Alarm
device
5.Booster
pump
6.Fire
department
system
8.Sprinkler heads 7.Pipe fittings &
hangers
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Sprinkler Efficacy
Concerned with whether the system will activate
(deliver waste) and takes into account such matters as
isolation of the system and failure of the water supply
The ability of the sprinkler system to f unction
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Smoke detector system
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Sprinkler Reliability
The reliability of sprinkler system depends
very much on how it is managed with respect
to modifications taking place within the
building.
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Photoelectric Smoke Detector Operation
Smoke produced by a fire affects the intensity
of a light beam passing through air. The smoke
can block or obscure the beam. It can also
cause the light to scatter due to reflection off
the smoke particles. Photoelectric smoke
detectors are designed to sense smoke by
utilizing these effects of smoke on light.
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Factor that influence in smoke detection
system
Sentivities of the photoelectric smoke detector
Photoelectric Detectors characteristic
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Photoelectric Smoke Detector Operation
A light source and light sensor are arranged so that the raysfrom the light source do not hit the light sensor.
When smoke particles enter the light path, some of the
light is scattered and redirected onto the sensor, causing
the detector to activate an alarm.
These detectors react quickly to visible smoke particles
from smoldering fires, but are less sensitive to the smaller
particles associated with flaming or very hot fires.
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Photoelectric Detectors characteristic
Photoelectric detectors are as effective as
ionization detectors in sensing smoke.
Photoelectric detectors respond more qu
icklyto all fires.
Photoelectric detectors are more expensive
than ionization units but the latter provides a
level of built-in security not found in
photoelectric detectors.
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Benefit of photoelectric detectors
system
Faster and easier installation.
Secure protection of alarms prior to commissioning.
Faster and easier installation in any scenario.
Faster and easier installation.
Fewer mistakes in sizing and positioning of cable hole.
Faster and easier termination.
Less scope for termination errors.
A simpler and more cost effective surface mount option.
Minimises visual impact and enhances householdersatisfaction.
Early warning can save lives.