VESDA LARGE OPEN SPACES - Xtralis
←
→
Page content transcription
If your browser does not render page correctly, please read the page content below
VESDA
LARGE OPEN SPACES
• AIRCRAFT HANGARS
VERY EARLY WARNING • AIRPORT TERMINALS
• CATHEDRALS
SMOKE DETECTION • CHURCHES
PROTECTS THE OCCUPANTS, • EXHIBITION & CONVENTION CENTERS
SERVICE AND REVENUE •
•
HOTEL ATRIUMS
LARGE WAREHOUSES
ASSOCIATED WITH: • OFFICE TOWER ATRIUMS
• RAILWAY STATIONS
• SHOPPING CENTERS
• STADIUMS
• SUPERSTORES
LEARN MORE: XTRALIS.COM
LEARN MORE: XTRALIS.COM
LARGE OPEN SPACES AND THE CHALLENGE
OF PROTECTING THEM FROM THE THREAT OF FIRE
CONSIDER... WHAT ARE THE
A fire starts because of an electrical CHALLENGES ASSOCIATED
fault on the second level of a three WITH DESIGNING A SMOKE
storey shopping center. The smoke DETECTION SYSTEM FOR
spreads to the atrium section of LARGE OPEN SPACES?
the shopping center, but the smoke
Dealing With Smoke Stratification
doesn’t have sufficient energy to rise
up to point-type detectors located on Smoke stratification occurs when
the ceiling of the atrium. The fire is not Figure 1 - Fire Growth Curve solar radiation creates a hot layer of air
detected. The incipient stage (Stage 1) of fire provides under the ceiling of an enclosed area.
the widest window of opportunity to detect When the hot layer of air is warmer
Smoke continues spreading on the and control the spread of fire. VESDA smoke
than the smoke plume, it will prevent
second level of the shopping center, detectors can be configured to multiple alarm
levels during the incipient stage of fire.
the smoke reaching ceiling-mounted
until it is noticed by shoppers who point-type detectors.
panic and run to the escalators. With VESDA - smoke is detected early,
Meanwhile, a maintenance person A VESDA system is comprised of a
information is available to assess the detector and a series of sampling
stumbles across the source of the
situation, and a plan is in place to pipes. This enables the designer to
fire and in an attempt to prevent the
respond accordingly. Lives are saved, place the pipe network where the
fire spreading, he shuts off the power
mains. The lighting in the shopping assets are protected, and business smoke will travel, in addition to the
center goes out, and the occupants continues as normal. ceiling, as may be required by codes
are left to fend for themselves in the and standards.
darkness; smoke is building up and THE VESDA ADVANTAGE
Overcoming The Effects of Smoke
the sense of panic heightens. VESDA - the world’s leading air Dilution
sampling smoke detection system Smoke in a large open area will be
CONVENTIONAL - provides the earliest warning of a highly diluted as it moves through a
DETECTORS ARE NOT potential fire event (refer to Figure 1). large volume of space, an effect which
SUITABLE FOR LARGE OPEN A VESDA system is highly sensitive, is compounded by air conditioning
SPACES and excels at detecting diluted systems. Selecting a smoke detector
smoke. A safe and orderly evacuation with high sensitivity and multiple
Conventional point-type and beam-
is assured with the extra time that sampling points is essential in this
type detectors are not sensitive
a VESDA smoke detection system environment. Beam detectors are
enough to provide early warning
provides. often used for this application, but they
of smoke in a large open space. By
are relatively insensitive - a fire would
the time smoke is detected a fire
be quite large before being detected. A
would have to be very large, creating
point-type detector measures smoke
sufficient heat and smoke to rise up
at a single point in space. If there is not
to conventional point-type detectors
enough smoke pooled at that point,
located on the ceiling.
the detector will not alarm.
VESDA detectors sample smoke
through holes (sampling points) in
the pipe network. Each sampling
point contributes to the smoke being
measured at the detector, enabling
much earlier fire detection.
Maintaining a Smoke Detection Preventing Nuisance Alarms Preserving Architectural Features
System High Above Ground Level Beam-type smoke detectors are often Traditional spot type smoke detectors
All detection systems require periodical prescribed for atriums and large can detract from the architectural
maintenance and testing, as per local open spaces. Unfortunately, seasonal beauty of a building. Using a concealed
standards. Accessing conventional banners and decorations can impede pipe network to supply air samples
point-type detectors for maintenance the beam, causing false alarms or to a hidden VESDA smoke detector
within large facilities with tall ceilings faults. A VESDA smoke detection means that the smoke detection
is difficult. Service crews often require system is not susceptible to such system can be virtually invisible within
costly machinery and platforms to false alarms. VESDA smoke detectors the building.
enable safe access to the detectors. have multiple alarm levels and
thresholds, enabling them to be used
VESDA detectors can be mounted
in conjunction with various planned
in accessible locations, enabling
response options. For example, the
easy access to the detector and pipe
first alarm could be used as a low level
network.
alarm, instructing a security guard
to investigate the event. The second
alarm could alert management that
the risk has escalated. In the unlikely
event that the situation could not
be controlled, the third alarm could Close-up of a VESDA sampling hole in an
intricate theater ceiling
initiate an evacuation and alert the fire
department.
Easy access for
maintenance and testing
saves having to bring in
access equipment.
VESDA sampling
pipes (shown
in red) can be
installed vertically.
This ensures that
smoke is detected
as it spreads
horizontally.
Smoke stratifies
into a mushroom
cloud below
ceiling level in a
large open space.
It may not reach
point-type smoke
detectors installed
on the ceiling.
XTRALIS’ GLOBAL NETWORK OF OFFICES
AND REPRESENTATIVES MEANS THAT HELP IS SOON AT HAND
EXAMPLES OF LARGE, OPEN SPACES THAT ARE PROTECTED BY VESDA SMOKE
DETECTORS:
Sports Venues Convention Centers
• Sydney Aquatic Center, Australia • D. H. Lawrence Convention Center, Pittsburgh, USA
• Olympic Velodrome, Sydney, Australia • Hong Kong Exhibition Center, Hong Kong
• Melbourne Sports & Aquatic Center, Australia • Kunming International Convention Center, China
• Xscape Indoor Skiing Center, UK • Gaylord Opryland Resort & Convention Center, TX, USA
• Hyderabad International Convention Center, India
Hotel & Entertainment Venues Shopping Centers
• Jupiters Casino, Gold Coast, Australia • Bluewater Shopping Center, UK
• Sydney Opera House, Australia • The Trafford Shopping Center, UK
• Museum of Scotland, UK • Braehead Shopping Center, UK
Transport Hubs Office Buildings
• ShangHai South Railway Station • Langham Place, Hong Kong
• Hong Kong Airport Terminal Building • Motorola, Austin, Texas, USA
• Hong Kong Airport Freight Terminal • AstraZenica, Manchester, UK
Heritage
• St. Pauls Cathedral, UK
• Newcastle Cathedral, UK
• Stormant Castle, Ireland
GLOBAL APPROVALS
NF
VdS
S E
R VIC E
TM
CNBOP
NEED MORE INFORMATION?
Visit www.xtralis.com to access information about the VESDA smoke detector product range and our Design Guides.
ABOUT XTRALIS
Xtralis is a leading global provider of We protect highly-valued
powerful solutions for the very early and irreplaceable assets and
& reliable detection of smoke, fire, infrastructure belonging to the world’s
and gas threats. Our technologies top governments and businesses.
prevent disasters by giving users
time to respond before life, critical To learn more, please visit us at
infrastructure or business continuity www.xtralis.com
is compromised.
LEARN MORE: XTRALIS.COM Doc. No. 13314_10
January 2022
You can also read
