Syrereducerande anl

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Syrereducerande anlägg Vad är det ?

• Erik Secher
• Kidde Sweden AB

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Hypoxic Air Ventilation (HAV) A revolution in
Fire Protection PAS 952011 (Draft) BSI 2010
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Some dimensions about fire
In Europe, each year

• 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

Which means
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Using ordinary air to save lives and property

• 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

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100 80 60 40 20 0
Prevenex Atmosphere
Ability to support combustion
21 20 19 18 17 16 15 14
13 12 11 10 9 8 7
Oxygen percentage at sea level.
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.
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15 million people live permanently at 2,500m or
more
100 80 60 40 20 0
Aspen Colorado
La Paz Bolivia
Level of oxygen saturation in the bloodstream
Mexico City
Highest piste Chamonix
Prevenex Injection
Prevenex Atmosphere
N2 injection
Death Zone
21 20 19 18 17 16 15 14
13 12 11 10 9 8 7 6
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Oxygen percentage at sea level.
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 Its as healthy as clean
mountain air
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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

Control Cabinet
O2 Sensors
Protected space
Modified Air
Compressor system
Reducing Module
Air
Silencer
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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
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Cost Comparison - Installation
Relative Cost
Volume of Risk m3
Slide courtesy of LPG Fire Ltd
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Operating cost 10 years with 1 discharge
Relative Cost
Volume of Risk m3
Plus up to 60 of Prevenex compressor energy can
be recovered as heat
Slide courtesy of LPG Fire Ltd
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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.
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Questions and answers !