What is CO2 • It is derived from Process waste and therefore not classed as a GWP gas. • CO2 is naturally Occuring Gas • No - Ozone depletion potential (ODP) • No - Global warming potential (GWP) • No - Atmospheric life • • • • CO2 is colourless and odourless CO2 is stored as a liquid in a cylinder CO2 is for total flood and local application uses CO2 is for unoccupied applications only as it is hazardous to humans at the concentrations required to extinguish fires How does CO2 work • CO2 is discharged into an enclosure or directly on to the surface requiring protection, and displaces the oxygen. • CO2 reduces the oxygen level to below that which can support combustion (the concentration varies depending on type of fire and risk). Fire Extinguished • CO2 creates a cooling effect on the fire and surrounding areas • The minimum CO2 fire extinguishing concentration of 34% is NOT life supporting • CO2 is suitable for surface & deep seated class ‘A’ fires • CO2 is suitable for flammable liquids & gas applications • CO2 is suitable for live electrical equipment applications The Benefits of CO2 • • • • • • • • • • • Clean agent Proven components Established technology High availability Low maintenance Low/High pressure systems Total flood/local applications Initial and extended discharge Class A,B,C and E fires BS 5750 Quality Assurance BS and NFPA design codes Critical temperature 69 Bar Liquid region Pressure - Bar 58 Bar Solid region Vapour region 5.17 Bar Triple point Atmospheric 1 Bar -79oC -57oC 0oC 21oC Temperature - oC 31oC CO2 - Systems فشار پائین فشار باال Total Flood Local Application Total Flood Local Application CO2 - High Pressure Storage • Seamless steel cylinder - 45kg CO2 • 2/3 full liquid CO2 • 1/3 full CO2 vapour - 58 bar • Reduced fill - tropics CO2 - High Pressure Storage Low Pressure Storage • 20 bar @ -20oC • Lagged pressure vessel • Refrigeration unit • CO2 bulk storage • Multi discharge capability Low Pressure Systems • Bulk • Mini-Bulk Low Pressure Bulk Systems Advantages • Wide range of storage tanks (680 - 54,430kg) • Any fire control panel can be used • Light weight valves + manual override • Can be remotely located up to 150 mtrs • Options for different power supply requirements • FM approved option • Total flooding, inerting, local application, extended discharge systems, hose reel systems Low Pressure CO2 Bulk Systems Low Pressure Mini-Bulk Advantages • FM Approved • Wide range of storage tanks,159, 227, 363, 454 and 680 kg (manifolding possible) • Savings on footprint - max. diameter 112 cm for 680 kg tank • Easy to service, no weighing (pressure gauges) • Filling on site by CO2 bulk tankers • Options for different power supply requirements • Hose reel systems possible • Stainless steel tanks Low Pressure Mini-Bulk Systems Total Flood Applications High Pressure Deep Seated Surface Flammable liquid stores Gas turbines Engines Oil -filled switchgear Cable ways Transformers Total Flood Applications - cont’d Low Pressure Coal silos and ball mills/pulverisers Turbo-generators Cement pulverising & dust collectors Paint mixing Local Applications System High Pressure Low Pressure Coating machines Fuel transfer/lube oil pumps Grinding mills Aluminium & Steel rolling mills Printing presses & ink storage Quench tanks Manual CO2 hosereels CO2 - Design Basis • BS - 5306 Part 4 • NFPA - 12 • Min. concentration 34% • Electrical risks 50% CO2 - Limitations • Life safety - Above 5% hazardous - Consider need for interlocks • Heavier than air - Low level vent & purge required CO2 - Other Limitations • Thermal shock • Static electricity • Enclosure leakage CO2 - Features & Benefits • Simple technology – High reliability • Low cost gas – Cost effective • Clean agent – No residue, no decomposition • High pressure storage – Cost effective < 1 tonne • Low pressure storage – Large systems, Tanker filling, multishot • Local application – Risk specific protection • Total flooding – Volume protection • Non-corrosive – Ideal for electronic systems CO2 - Features & Benefits cont. • Surface – Rapid extinguish 1 min discharge • Deep seated – Only gas suitable • Directional valves – Central bank high/low pressure • Extended discharge – Leaking enclosures • Hosereels – Manual fire fighting • Inerting – Explosion hazards • Naturally occurring inert gas – Long term availability worldwide Summary CO2 : • Inert gas • Available worldwide • Clean agent • Surface & deep seated fires • Total flood & local application • High pressure (58bar) • Low pressure (20 bar) CO2 SIMPLE RELIABLE VERSATILE Cost effective fire protection for unmanned applications Applications • Wormald has many years experience in the CO2 extinguishing systems market around the World • Some of the applications for CO2: • • • • • • • • • Archives Coating Machines Commercial Fryers Degreasing and Cleaning Processors Dip Tanks Electrical Cabinets Flammable Liquid Storage Flow Coating Machines • • • • • • • • Floor Covering Machines Lubricating Oil Plants Printing Machines Rolling Mills Turbines Spray Booths Switch Rooms Waste Disposal Equipment And many more Commercial and industrial uses.