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Syrereducerande anlägg – Vad är det ?Erik Secher
Kidde Sweden AB
Kidde Sweden AB
Hypoxic Air Ventilation (HAV)
A revolution in Fire Protection
PAS 95:2011 (Draft)BSI 2010
Kidde Sweden AB Some dimensions about fire
• 20,000 to 25,000 deaths• 250,000 to 500,000 injuries• 80% of deaths and injuries occur in buildings• 20 Billion Euros in Fire related insurance claims• 1 Historic building lost per day
• Massive disruption to business • Irreplaceable loss of our Cultural Heritage• Fire is the major driver of commercial insurance cost
In Europe, each year
Which means
Kidde Sweden AB
• Prevenex: Uses compressor to reduce oxygen content.
• Oxyreduct: Uses Nitrogen Generators to reduce oxygen level.
• Inward Leakage
• Maximum oxygen concentration level
• Minimum oxygen concentration level
• Oxygen alarm level
• Acceptable space for human occupancy
Using ordinary air to save lives and property
Kidde Sweden AB
100
80
60
40
20
0
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7
Ability to support
combustion%
Oxygen percentage at sea level. %
PrevenexAtmosphere
At 16.2% Oxygen, the large Nitrogen atoms extract heat from the combustion process at such a rate that it cannot continue.
In effect, there are enough nitrogen atoms to form a ‘fire blanket’ around each oxygen atom. No fire can start.
Kidde Sweden AB
100
80
60
40
20
0
21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5
Level of oxygen saturation in the
bloodstream%
Oxygen percentage at sea level. %
PrevenexAtmosphere
Tiny decrease in Blood Oxygen Level from 98% to 95% saturated
Small initial increase in breathing and heart rates, which return to normal with extended exposure
It’s as healthy as clean mountain air
Prevenex Injection
N2 injection
DeathZone
La PazBolivia
Highest pisteChamonix
MexicoCity
AspenColorado
15 million people live permanently at 2,500m or more
Kidde Sweden AB Compact, Unobtrusive & Automatic
• On site generators create and maintain set oxygen levels totally automatically
• Multiple rooms independently controlled from one unit.
• Virtually silent and un-noticeable in the protected space.
• Protects in even the most inaccessible locations – inside cabinets, in ducts, in ceiling voids, even inside packaging – anywhere that there is air.
• Humidity and Temperature control can be integrated.
• Simple to install in new or existing locations
Compressor system
ReducingModule
ControlCabinet
Protected space
O2 Sensors
SilencerAir
ModifiedAir
Kidde Sweden AB Massive savings on space
A conventional Inert Gas suppression system to
protect a 6,000 cu.m. space
A Prevenex HAV module to protect TWICE the volume
spread over 6 rooms
More floor space available for revenue generation
Installation time and cost reduced by 70% or more
Minimal impact on the building
Kidde Sweden AB Cost Comparison - Installation
Rel
ativ
e C
ost
Volume of Risk m3
Slide courtesy of LPG Fire Ltd
Kidde Sweden AB Operating cost: 10 years with 1 discharge
Rel
ativ
e C
ost
Volume of Risk m3
Slide courtesy of LPG Fire Ltd
Plus up to 60% of Prevenex compressor energy can be recovered as heat
Kidde Sweden AB Summary
• Risk of Fire totally removed, even in inaccessible places.
• No need for Pressure Relief Dampers or Extraction Systems
• Greatly simplified installation.
• Small footprint – more space available for revenue generation
• Increasingly cost effective above 2,000m³
• Virtually no pipes or other equipment in the protected areas.
• No need to provide positive pressure to maintain high air quality
Note: It is suggested that a aspirating smoke detection system be installed to warn of any smouldering events due to short
circuits etc.
Questions and answers !
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